diff --git a/intermediate/indexing/advanced-indexing.ipynb b/intermediate/indexing/advanced-indexing.ipynb
index a5a8095e..9950e621 100644
--- a/intermediate/indexing/advanced-indexing.ipynb
+++ b/intermediate/indexing/advanced-indexing.ipynb
@@ -33,24 +33,9 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 1,
+   "execution_count": null,
    "metadata": {},
-   "outputs": [
-    {
-     "data": {
-      "text/plain": [
-       "array([[ 1,  2,  3,  4,  5],\n",
-       "       [ 6,  7,  8,  9, 10],\n",
-       "       [11, 12, 13, 14, 15],\n",
-       "       [16, 17, 18, 19, 20],\n",
-       "       [21, 22, 23, 24, 25]])"
-      ]
-     },
-     "execution_count": 1,
-     "metadata": {},
-     "output_type": "execute_result"
-    }
-   ],
+   "outputs": [],
    "source": [
     "import numpy as np\n",
     "\n",
@@ -68,822 +53,32 @@
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+   "execution_count": null,
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-       "</style><pre class='xr-text-repr-fallback'>&lt;xarray.DataArray (x: 5, y: 5)&gt;\n",
-       "array([[ 1,  2, ...,  4,  5],\n",
-       "       [ 6,  7, ...,  9, 10],\n",
-       "       ...,\n",
-       "       [16, 17, ..., 19, 20],\n",
-       "       [21, 22, ..., 24, 25]])\n",
-       "Dimensions without coordinates: x, y</pre><div class='xr-wrap' style='display:none'><div class='xr-header'><div class='xr-obj-type'>xarray.DataArray</div><div class='xr-array-name'></div><ul class='xr-dim-list'><li><span>x</span>: 5</li><li><span>y</span>: 5</li></ul></div><ul class='xr-sections'><li class='xr-section-item'><div class='xr-array-wrap'><input id='section-0d12c983-a85a-430f-a425-b02b38a328dc' class='xr-array-in' type='checkbox' checked><label for='section-0d12c983-a85a-430f-a425-b02b38a328dc' title='Show/hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-array-preview xr-preview'><span>1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25</span></div><div class='xr-array-data'><pre>array([[ 1,  2, ...,  4,  5],\n",
-       "       [ 6,  7, ...,  9, 10],\n",
-       "       ...,\n",
-       "       [16, 17, ..., 19, 20],\n",
-       "       [21, 22, ..., 24, 25]])</pre></div></div></li><li class='xr-section-item'><input id='section-f091a821-5624-42ef-9a8a-17ac3a196b52' class='xr-section-summary-in' type='checkbox' disabled ><label for='section-f091a821-5624-42ef-9a8a-17ac3a196b52' class='xr-section-summary'  title='Expand/collapse section'>Coordinates: <span>(0)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'></ul></div></li><li class='xr-section-item'><input id='section-7dc572f6-378d-4406-898b-39ed2288ee71' class='xr-section-summary-in' type='checkbox' disabled ><label for='section-7dc572f6-378d-4406-898b-39ed2288ee71' class='xr-section-summary'  title='Expand/collapse section'>Indexes: <span>(0)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'></ul></div></li><li class='xr-section-item'><input id='section-99ac38ed-5871-4eb3-9003-56ae445f6e24' class='xr-section-summary-in' type='checkbox' disabled ><label for='section-99ac38ed-5871-4eb3-9003-56ae445f6e24' class='xr-section-summary'  title='Expand/collapse section'>Attributes: <span>(0)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><dl class='xr-attrs'></dl></div></li></ul></div></div>"
-      ],
-      "text/plain": [
-       "<xarray.DataArray (x: 5, y: 5)>\n",
-       "array([[ 1,  2, ...,  4,  5],\n",
-       "       [ 6,  7, ...,  9, 10],\n",
-       "       ...,\n",
-       "       [16, 17, ..., 19, 20],\n",
-       "       [21, 22, ..., 24, 25]])\n",
-       "Dimensions without coordinates: x, y"
-      ]
-     },
-     "execution_count": 54,
-     "metadata": {},
-     "output_type": "execute_result"
-    }
-   ],
+   "outputs": [],
    "source": [
     "import xarray as xr\n",
+    "\n",
     "da = xr.DataArray(np_array, dims=[\"x\", \"y\"])\n",
     "da"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 3,
+   "execution_count": null,
    "metadata": {},
-   "outputs": [
-    {
-     "data": {
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-       "array([ 1, 13, 25])"
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-     "execution_count": 3,
-     "metadata": {},
-     "output_type": "execute_result"
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-   ],
+   "outputs": [],
    "source": [
-    "np_array [[0,2,4],[0,2,4]]"
+    "np_array[[0, 2, 4], [0, 2, 4]]"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 4,
+   "execution_count": null,
    "metadata": {},
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-       "<style>/* CSS stylesheet for displaying xarray objects in jupyterlab.\n",
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-       "\n",
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-       "  --xr-background-color-row-even: #111111;\n",
-       "  --xr-background-color-row-odd: #313131;\n",
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-       "\n",
-       ".xr-wrap {\n",
-       "  display: block !important;\n",
-       "  min-width: 300px;\n",
-       "  max-width: 700px;\n",
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-       "\n",
-       ".xr-text-repr-fallback {\n",
-       "  /* fallback to plain text repr when CSS is not injected (untrusted notebook) */\n",
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-       "  border-bottom: solid 1px var(--xr-border-color);\n",
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-       "  margin-top: 0;\n",
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-       ".xr-section-item input {\n",
-       "  display: none;\n",
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-       "  font-weight: 500;\n",
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-       "  padding-top: 4px;\n",
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-       "\n",
-       ".xr-preview {\n",
-       "  color: var(--xr-font-color3);\n",
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-       ".xr-array-data {\n",
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-       "\n",
-       ".xr-var-item > .xr-var-name:hover span {\n",
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-       "\n",
-       ".xr-attrs dt,\n",
-       ".xr-attrs dd {\n",
-       "  padding: 0;\n",
-       "  margin: 0;\n",
-       "  float: left;\n",
-       "  padding-right: 10px;\n",
-       "  width: auto;\n",
-       "}\n",
-       "\n",
-       ".xr-attrs dt {\n",
-       "  font-weight: normal;\n",
-       "  grid-column: 1;\n",
-       "}\n",
-       "\n",
-       ".xr-attrs dt:hover span {\n",
-       "  display: inline-block;\n",
-       "  background: var(--xr-background-color);\n",
-       "  padding-right: 10px;\n",
-       "}\n",
-       "\n",
-       ".xr-attrs dd {\n",
-       "  grid-column: 2;\n",
-       "  white-space: pre-wrap;\n",
-       "  word-break: break-all;\n",
-       "}\n",
-       "\n",
-       ".xr-icon-database,\n",
-       ".xr-icon-file-text2,\n",
-       ".xr-no-icon {\n",
-       "  display: inline-block;\n",
-       "  vertical-align: middle;\n",
-       "  width: 1em;\n",
-       "  height: 1.5em !important;\n",
-       "  stroke-width: 0;\n",
-       "  stroke: currentColor;\n",
-       "  fill: currentColor;\n",
-       "}\n",
-       "</style><pre class='xr-text-repr-fallback'>&lt;xarray.DataArray (dim_0: 3, dim_1: 3)&gt;\n",
-       "array([[ 1,  3,  5],\n",
-       "       [11, 13, 15],\n",
-       "       [21, 23, 25]])\n",
-       "Dimensions without coordinates: dim_0, dim_1</pre><div class='xr-wrap' style='display:none'><div class='xr-header'><div class='xr-obj-type'>xarray.DataArray</div><div class='xr-array-name'></div><ul class='xr-dim-list'><li><span>dim_0</span>: 3</li><li><span>dim_1</span>: 3</li></ul></div><ul class='xr-sections'><li class='xr-section-item'><div class='xr-array-wrap'><input id='section-9e9d4df7-189e-4dd9-9366-0b92f4f1a049' class='xr-array-in' type='checkbox' checked><label for='section-9e9d4df7-189e-4dd9-9366-0b92f4f1a049' title='Show/hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-array-preview xr-preview'><span>1 3 5 11 13 15 21 23 25</span></div><div class='xr-array-data'><pre>array([[ 1,  3,  5],\n",
-       "       [11, 13, 15],\n",
-       "       [21, 23, 25]])</pre></div></div></li><li class='xr-section-item'><input id='section-0705b97e-f1ee-4cb4-85ee-c040dbe37837' class='xr-section-summary-in' type='checkbox' disabled ><label for='section-0705b97e-f1ee-4cb4-85ee-c040dbe37837' class='xr-section-summary'  title='Expand/collapse section'>Coordinates: <span>(0)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'></ul></div></li><li class='xr-section-item'><input id='section-b44322be-f401-44a4-8e03-8ebe8397de01' class='xr-section-summary-in' type='checkbox' disabled ><label for='section-b44322be-f401-44a4-8e03-8ebe8397de01' class='xr-section-summary'  title='Expand/collapse section'>Indexes: <span>(0)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'></ul></div></li><li class='xr-section-item'><input id='section-d0886095-551c-4fda-803a-3931ee368c47' class='xr-section-summary-in' type='checkbox' disabled ><label for='section-d0886095-551c-4fda-803a-3931ee368c47' class='xr-section-summary'  title='Expand/collapse section'>Attributes: <span>(0)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><dl class='xr-attrs'></dl></div></li></ul></div></div>"
-      ],
-      "text/plain": [
-       "<xarray.DataArray (dim_0: 3, dim_1: 3)>\n",
-       "array([[ 1,  3,  5],\n",
-       "       [11, 13, 15],\n",
-       "       [21, 23, 25]])\n",
-       "Dimensions without coordinates: dim_0, dim_1"
-      ]
-     },
-     "execution_count": 4,
-     "metadata": {},
-     "output_type": "execute_result"
-    }
-   ],
+   "outputs": [],
    "source": [
-    "da [[0,2,4],[0,2,4]]"
+    "da[[0, 2, 4], [0, 2, 4]]"
    ]
   },
   {
@@ -918,459 +113,11 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 5,
+   "execution_count": null,
    "metadata": {
     "tags": []
    },
-   "outputs": [
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-       "  min-width: 300px;\n",
-       "  max-width: 700px;\n",
-       "}\n",
-       "\n",
-       ".xr-text-repr-fallback {\n",
-       "  /* fallback to plain text repr when CSS is not injected (untrusted notebook) */\n",
-       "  display: none;\n",
-       "}\n",
-       "\n",
-       ".xr-header {\n",
-       "  padding-top: 6px;\n",
-       "  padding-bottom: 6px;\n",
-       "  margin-bottom: 4px;\n",
-       "  border-bottom: solid 1px var(--xr-border-color);\n",
-       "}\n",
-       "\n",
-       ".xr-header > div,\n",
-       ".xr-header > ul {\n",
-       "  display: inline;\n",
-       "  margin-top: 0;\n",
-       "  margin-bottom: 0;\n",
-       "}\n",
-       "\n",
-       ".xr-obj-type,\n",
-       ".xr-array-name {\n",
-       "  margin-left: 2px;\n",
-       "  margin-right: 10px;\n",
-       "}\n",
-       "\n",
-       ".xr-obj-type {\n",
-       "  color: var(--xr-font-color2);\n",
-       "}\n",
-       "\n",
-       ".xr-sections {\n",
-       "  padding-left: 0 !important;\n",
-       "  display: grid;\n",
-       "  grid-template-columns: 150px auto auto 1fr 20px 20px;\n",
-       "}\n",
-       "\n",
-       ".xr-section-item {\n",
-       "  display: contents;\n",
-       "}\n",
-       "\n",
-       ".xr-section-item input {\n",
-       "  display: none;\n",
-       "}\n",
-       "\n",
-       ".xr-section-item input + label {\n",
-       "  color: var(--xr-disabled-color);\n",
-       "}\n",
-       "\n",
-       ".xr-section-item input:enabled + label {\n",
-       "  cursor: pointer;\n",
-       "  color: var(--xr-font-color2);\n",
-       "}\n",
-       "\n",
-       ".xr-section-item input:enabled + label:hover {\n",
-       "  color: var(--xr-font-color0);\n",
-       "}\n",
-       "\n",
-       ".xr-section-summary {\n",
-       "  grid-column: 1;\n",
-       "  color: var(--xr-font-color2);\n",
-       "  font-weight: 500;\n",
-       "}\n",
-       "\n",
-       ".xr-section-summary > span {\n",
-       "  display: inline-block;\n",
-       "  padding-left: 0.5em;\n",
-       "}\n",
-       "\n",
-       ".xr-section-summary-in:disabled + label {\n",
-       "  color: var(--xr-font-color2);\n",
-       "}\n",
-       "\n",
-       ".xr-section-summary-in + label:before {\n",
-       "  display: inline-block;\n",
-       "  content: '►';\n",
-       "  font-size: 11px;\n",
-       "  width: 15px;\n",
-       "  text-align: center;\n",
-       "}\n",
-       "\n",
-       ".xr-section-summary-in:disabled + label:before {\n",
-       "  color: var(--xr-disabled-color);\n",
-       "}\n",
-       "\n",
-       ".xr-section-summary-in:checked + label:before {\n",
-       "  content: '▼';\n",
-       "}\n",
-       "\n",
-       ".xr-section-summary-in:checked + label > span {\n",
-       "  display: none;\n",
-       "}\n",
-       "\n",
-       ".xr-section-summary,\n",
-       ".xr-section-inline-details {\n",
-       "  padding-top: 4px;\n",
-       "  padding-bottom: 4px;\n",
-       "}\n",
-       "\n",
-       ".xr-section-inline-details {\n",
-       "  grid-column: 2 / -1;\n",
-       "}\n",
-       "\n",
-       ".xr-section-details {\n",
-       "  display: none;\n",
-       "  grid-column: 1 / -1;\n",
-       "  margin-bottom: 5px;\n",
-       "}\n",
-       "\n",
-       ".xr-section-summary-in:checked ~ .xr-section-details {\n",
-       "  display: contents;\n",
-       "}\n",
-       "\n",
-       ".xr-array-wrap {\n",
-       "  grid-column: 1 / -1;\n",
-       "  display: grid;\n",
-       "  grid-template-columns: 20px auto;\n",
-       "}\n",
-       "\n",
-       ".xr-array-wrap > label {\n",
-       "  grid-column: 1;\n",
-       "  vertical-align: top;\n",
-       "}\n",
-       "\n",
-       ".xr-preview {\n",
-       "  color: var(--xr-font-color3);\n",
-       "}\n",
-       "\n",
-       ".xr-array-preview,\n",
-       ".xr-array-data {\n",
-       "  padding: 0 5px !important;\n",
-       "  grid-column: 2;\n",
-       "}\n",
-       "\n",
-       ".xr-array-data,\n",
-       ".xr-array-in:checked ~ .xr-array-preview {\n",
-       "  display: none;\n",
-       "}\n",
-       "\n",
-       ".xr-array-in:checked ~ .xr-array-data,\n",
-       ".xr-array-preview {\n",
-       "  display: inline-block;\n",
-       "}\n",
-       "\n",
-       ".xr-dim-list {\n",
-       "  display: inline-block !important;\n",
-       "  list-style: none;\n",
-       "  padding: 0 !important;\n",
-       "  margin: 0;\n",
-       "}\n",
-       "\n",
-       ".xr-dim-list li {\n",
-       "  display: inline-block;\n",
-       "  padding: 0;\n",
-       "  margin: 0;\n",
-       "}\n",
-       "\n",
-       ".xr-dim-list:before {\n",
-       "  content: '(';\n",
-       "}\n",
-       "\n",
-       ".xr-dim-list:after {\n",
-       "  content: ')';\n",
-       "}\n",
-       "\n",
-       ".xr-dim-list li:not(:last-child):after {\n",
-       "  content: ',';\n",
-       "  padding-right: 5px;\n",
-       "}\n",
-       "\n",
-       ".xr-has-index {\n",
-       "  font-weight: bold;\n",
-       "}\n",
-       "\n",
-       ".xr-var-list,\n",
-       ".xr-var-item {\n",
-       "  display: contents;\n",
-       "}\n",
-       "\n",
-       ".xr-var-item > div,\n",
-       ".xr-var-item label,\n",
-       ".xr-var-item > .xr-var-name span {\n",
-       "  background-color: var(--xr-background-color-row-even);\n",
-       "  margin-bottom: 0;\n",
-       "}\n",
-       "\n",
-       ".xr-var-item > .xr-var-name:hover span {\n",
-       "  padding-right: 5px;\n",
-       "}\n",
-       "\n",
-       ".xr-var-list > li:nth-child(odd) > div,\n",
-       ".xr-var-list > li:nth-child(odd) > label,\n",
-       ".xr-var-list > li:nth-child(odd) > .xr-var-name span {\n",
-       "  background-color: var(--xr-background-color-row-odd);\n",
-       "}\n",
-       "\n",
-       ".xr-var-name {\n",
-       "  grid-column: 1;\n",
-       "}\n",
-       "\n",
-       ".xr-var-dims {\n",
-       "  grid-column: 2;\n",
-       "}\n",
-       "\n",
-       ".xr-var-dtype {\n",
-       "  grid-column: 3;\n",
-       "  text-align: right;\n",
-       "  color: var(--xr-font-color2);\n",
-       "}\n",
-       "\n",
-       ".xr-var-preview {\n",
-       "  grid-column: 4;\n",
-       "}\n",
-       "\n",
-       ".xr-index-preview {\n",
-       "  grid-column: 2 / 5;\n",
-       "  color: var(--xr-font-color2);\n",
-       "}\n",
-       "\n",
-       ".xr-var-name,\n",
-       ".xr-var-dims,\n",
-       ".xr-var-dtype,\n",
-       ".xr-preview,\n",
-       ".xr-attrs dt {\n",
-       "  white-space: nowrap;\n",
-       "  overflow: hidden;\n",
-       "  text-overflow: ellipsis;\n",
-       "  padding-right: 10px;\n",
-       "}\n",
-       "\n",
-       ".xr-var-name:hover,\n",
-       ".xr-var-dims:hover,\n",
-       ".xr-var-dtype:hover,\n",
-       ".xr-attrs dt:hover {\n",
-       "  overflow: visible;\n",
-       "  width: auto;\n",
-       "  z-index: 1;\n",
-       "}\n",
-       "\n",
-       ".xr-var-attrs,\n",
-       ".xr-var-data,\n",
-       ".xr-index-data {\n",
-       "  display: none;\n",
-       "  background-color: var(--xr-background-color) !important;\n",
-       "  padding-bottom: 5px !important;\n",
-       "}\n",
-       "\n",
-       ".xr-var-attrs-in:checked ~ .xr-var-attrs,\n",
-       ".xr-var-data-in:checked ~ .xr-var-data,\n",
-       ".xr-index-data-in:checked ~ .xr-index-data {\n",
-       "  display: block;\n",
-       "}\n",
-       "\n",
-       ".xr-var-data > table {\n",
-       "  float: right;\n",
-       "}\n",
-       "\n",
-       ".xr-var-name span,\n",
-       ".xr-var-data,\n",
-       ".xr-index-name div,\n",
-       ".xr-index-data,\n",
-       ".xr-attrs {\n",
-       "  padding-left: 25px !important;\n",
-       "}\n",
-       "\n",
-       ".xr-attrs,\n",
-       ".xr-var-attrs,\n",
-       ".xr-var-data,\n",
-       ".xr-index-data {\n",
-       "  grid-column: 1 / -1;\n",
-       "}\n",
-       "\n",
-       "dl.xr-attrs {\n",
-       "  padding: 0;\n",
-       "  margin: 0;\n",
-       "  display: grid;\n",
-       "  grid-template-columns: 125px auto;\n",
-       "}\n",
-       "\n",
-       ".xr-attrs dt,\n",
-       ".xr-attrs dd {\n",
-       "  padding: 0;\n",
-       "  margin: 0;\n",
-       "  float: left;\n",
-       "  padding-right: 10px;\n",
-       "  width: auto;\n",
-       "}\n",
-       "\n",
-       ".xr-attrs dt {\n",
-       "  font-weight: normal;\n",
-       "  grid-column: 1;\n",
-       "}\n",
-       "\n",
-       ".xr-attrs dt:hover span {\n",
-       "  display: inline-block;\n",
-       "  background: var(--xr-background-color);\n",
-       "  padding-right: 10px;\n",
-       "}\n",
-       "\n",
-       ".xr-attrs dd {\n",
-       "  grid-column: 2;\n",
-       "  white-space: pre-wrap;\n",
-       "  word-break: break-all;\n",
-       "}\n",
-       "\n",
-       ".xr-icon-database,\n",
-       ".xr-icon-file-text2,\n",
-       ".xr-no-icon {\n",
-       "  display: inline-block;\n",
-       "  vertical-align: middle;\n",
-       "  width: 1em;\n",
-       "  height: 1.5em !important;\n",
-       "  stroke-width: 0;\n",
-       "  stroke: currentColor;\n",
-       "  fill: currentColor;\n",
-       "}\n",
-       "</style><pre class='xr-text-repr-fallback'>&lt;xarray.Dataset&gt;\n",
-       "Dimensions:  (lat: 25, time: 2920, lon: 53)\n",
-       "Coordinates:\n",
-       "  * lat      (lat) float32 75.0 72.5 70.0 67.5 65.0 ... 25.0 22.5 20.0 17.5 15.0\n",
-       "  * lon      (lon) float32 200.0 202.5 205.0 207.5 ... 322.5 325.0 327.5 330.0\n",
-       "  * time     (time) datetime64[ns] 2013-01-01 ... 2014-12-31T18:00:00\n",
-       "Data variables:\n",
-       "    air      (time, lat, lon) float32 241.2 242.5 243.5 ... 296.5 296.2 295.7\n",
-       "Attributes: (5)</pre><div class='xr-wrap' style='display:none'><div class='xr-header'><div class='xr-obj-type'>xarray.Dataset</div></div><ul class='xr-sections'><li class='xr-section-item'><input id='section-d3e5d95f-1b7d-4e54-9def-e316e3fc3f65' class='xr-section-summary-in' type='checkbox' disabled ><label for='section-d3e5d95f-1b7d-4e54-9def-e316e3fc3f65' class='xr-section-summary'  title='Expand/collapse section'>Dimensions:</label><div class='xr-section-inline-details'><ul class='xr-dim-list'><li><span class='xr-has-index'>lat</span>: 25</li><li><span class='xr-has-index'>time</span>: 2920</li><li><span class='xr-has-index'>lon</span>: 53</li></ul></div><div class='xr-section-details'></div></li><li class='xr-section-item'><input id='section-a00cff58-3d5b-4479-9205-f2df0ff7c3f2' class='xr-section-summary-in' type='checkbox'  checked><label for='section-a00cff58-3d5b-4479-9205-f2df0ff7c3f2' class='xr-section-summary' >Coordinates: <span>(3)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'><li class='xr-var-item'><div class='xr-var-name'><span class='xr-has-index'>lat</span></div><div class='xr-var-dims'>(lat)</div><div class='xr-var-dtype'>float32</div><div class='xr-var-preview xr-preview'>75.0 72.5 70.0 ... 20.0 17.5 15.0</div><input id='attrs-c1c2e065-ec49-4c06-ba78-df43eb6d7a14' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-c1c2e065-ec49-4c06-ba78-df43eb6d7a14' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-ae458e70-bef5-477f-a94d-d04d9a2f2c52' class='xr-var-data-in' type='checkbox'><label for='data-ae458e70-bef5-477f-a94d-d04d9a2f2c52' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>standard_name :</span></dt><dd>latitude</dd><dt><span>long_name :</span></dt><dd>Latitude</dd><dt><span>units :</span></dt><dd>degrees_north</dd><dt><span>axis :</span></dt><dd>Y</dd></dl></div><div class='xr-var-data'><pre>array([75. , 72.5, 70. , 67.5, 65. , 62.5, 60. , 57.5, 55. , 52.5, 50. , 47.5,\n",
-       "       45. , 42.5, 40. , 37.5, 35. , 32.5, 30. , 27.5, 25. , 22.5, 20. , 17.5,\n",
-       "       15. ], dtype=float32)</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span class='xr-has-index'>lon</span></div><div class='xr-var-dims'>(lon)</div><div class='xr-var-dtype'>float32</div><div class='xr-var-preview xr-preview'>200.0 202.5 205.0 ... 327.5 330.0</div><input id='attrs-82d93821-a312-489e-9e8c-ac4bb0452cd8' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-82d93821-a312-489e-9e8c-ac4bb0452cd8' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-29597d86-820d-448a-ac11-c4121d1f25f6' class='xr-var-data-in' type='checkbox'><label for='data-29597d86-820d-448a-ac11-c4121d1f25f6' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>standard_name :</span></dt><dd>longitude</dd><dt><span>long_name :</span></dt><dd>Longitude</dd><dt><span>units :</span></dt><dd>degrees_east</dd><dt><span>axis :</span></dt><dd>X</dd></dl></div><div class='xr-var-data'><pre>array([200. , 202.5, 205. , 207.5, 210. , 212.5, 215. , 217.5, 220. , 222.5,\n",
-       "       225. , 227.5, 230. , 232.5, 235. , 237.5, 240. , 242.5, 245. , 247.5,\n",
-       "       250. , 252.5, 255. , 257.5, 260. , 262.5, 265. , 267.5, 270. , 272.5,\n",
-       "       275. , 277.5, 280. , 282.5, 285. , 287.5, 290. , 292.5, 295. , 297.5,\n",
-       "       300. , 302.5, 305. , 307.5, 310. , 312.5, 315. , 317.5, 320. , 322.5,\n",
-       "       325. , 327.5, 330. ], dtype=float32)</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span class='xr-has-index'>time</span></div><div class='xr-var-dims'>(time)</div><div class='xr-var-dtype'>datetime64[ns]</div><div class='xr-var-preview xr-preview'>2013-01-01 ... 2014-12-31T18:00:00</div><input id='attrs-33df6204-26b4-4e09-94ae-25fb40d58b68' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-33df6204-26b4-4e09-94ae-25fb40d58b68' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-30bc2d67-609b-4fff-8fa1-4f454303a65c' class='xr-var-data-in' type='checkbox'><label for='data-30bc2d67-609b-4fff-8fa1-4f454303a65c' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>standard_name :</span></dt><dd>time</dd><dt><span>long_name :</span></dt><dd>Time</dd></dl></div><div class='xr-var-data'><pre>array([&#x27;2013-01-01T00:00:00.000000000&#x27;, &#x27;2013-01-01T06:00:00.000000000&#x27;,\n",
-       "       &#x27;2013-01-01T12:00:00.000000000&#x27;, ..., &#x27;2014-12-31T06:00:00.000000000&#x27;,\n",
-       "       &#x27;2014-12-31T12:00:00.000000000&#x27;, &#x27;2014-12-31T18:00:00.000000000&#x27;],\n",
-       "      dtype=&#x27;datetime64[ns]&#x27;)</pre></div></li></ul></div></li><li class='xr-section-item'><input id='section-c547518e-2982-4c15-bd6c-cfbbe93a0942' class='xr-section-summary-in' type='checkbox'  checked><label for='section-c547518e-2982-4c15-bd6c-cfbbe93a0942' class='xr-section-summary' >Data variables: <span>(1)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'><li class='xr-var-item'><div class='xr-var-name'><span>air</span></div><div class='xr-var-dims'>(time, lat, lon)</div><div class='xr-var-dtype'>float32</div><div class='xr-var-preview xr-preview'>241.2 242.5 243.5 ... 296.2 295.7</div><input id='attrs-c452d624-d6fa-4a77-acaf-5016132351f5' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-c452d624-d6fa-4a77-acaf-5016132351f5' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-eb6cb28c-eb8e-4493-86ce-bc0dcc9d7053' class='xr-var-data-in' type='checkbox'><label for='data-eb6cb28c-eb8e-4493-86ce-bc0dcc9d7053' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>long_name :</span></dt><dd>4xDaily Air temperature at sigma level 995</dd><dt><span>units :</span></dt><dd>degK</dd><dt><span>precision :</span></dt><dd>2</dd><dt><span>GRIB_id :</span></dt><dd>11</dd><dt><span>GRIB_name :</span></dt><dd>TMP</dd><dt><span>var_desc :</span></dt><dd>Air temperature</dd><dt><span>dataset :</span></dt><dd>NMC Reanalysis</dd><dt><span>level_desc :</span></dt><dd>Surface</dd><dt><span>statistic :</span></dt><dd>Individual Obs</dd><dt><span>parent_stat :</span></dt><dd>Other</dd><dt><span>actual_range :</span></dt><dd>[185.16 322.1 ]</dd></dl></div><div class='xr-var-data'><pre>array([[[241.2    , 242.5    , ..., 235.5    , 238.59999],\n",
-       "        [243.79999, 244.5    , ..., 235.29999, 239.29999],\n",
-       "        ...,\n",
-       "        [295.9    , 296.19998, ..., 295.9    , 295.19998],\n",
-       "        [296.29   , 296.79   , ..., 296.79   , 296.6    ]],\n",
-       "\n",
-       "       [[242.09999, 242.7    , ..., 233.59999, 235.79999],\n",
-       "        [243.59999, 244.09999, ..., 232.5    , 235.7    ],\n",
-       "        ...,\n",
-       "        [296.19998, 296.69998, ..., 295.5    , 295.1    ],\n",
-       "        [296.29   , 297.19998, ..., 296.4    , 296.6    ]],\n",
-       "\n",
-       "       ...,\n",
-       "\n",
-       "       [[245.79   , 244.79   , ..., 243.98999, 244.79   ],\n",
-       "        [249.89   , 249.29   , ..., 242.48999, 244.29   ],\n",
-       "        ...,\n",
-       "        [296.29   , 297.19   , ..., 295.09   , 294.38998],\n",
-       "        [297.79   , 298.38998, ..., 295.49   , 295.19   ]],\n",
-       "\n",
-       "       [[245.09   , 244.29   , ..., 241.48999, 241.79   ],\n",
-       "        [249.89   , 249.29   , ..., 240.29   , 241.68999],\n",
-       "        ...,\n",
-       "        [296.09   , 296.88998, ..., 295.69   , 295.19   ],\n",
-       "        [297.69   , 298.09   , ..., 296.19   , 295.69   ]]], dtype=float32)</pre></div></li></ul></div></li><li class='xr-section-item'><input id='section-3586e417-7e7e-49e1-a14e-f34094e7104e' class='xr-section-summary-in' type='checkbox'  ><label for='section-3586e417-7e7e-49e1-a14e-f34094e7104e' class='xr-section-summary' >Indexes: <span>(3)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'><li class='xr-var-item'><div class='xr-index-name'><div>lat</div></div><div class='xr-index-preview'>PandasIndex</div><div></div><input id='index-e6a44cd5-d7f8-4bcf-ac25-10cd4d3a8c7f' class='xr-index-data-in' type='checkbox'/><label for='index-e6a44cd5-d7f8-4bcf-ac25-10cd4d3a8c7f' title='Show/Hide index repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-index-data'><pre>PandasIndex(Index([75.0, 72.5, 70.0, 67.5, 65.0, 62.5, 60.0, 57.5, 55.0, 52.5, 50.0, 47.5,\n",
-       "       45.0, 42.5, 40.0, 37.5, 35.0, 32.5, 30.0, 27.5, 25.0, 22.5, 20.0, 17.5,\n",
-       "       15.0],\n",
-       "      dtype=&#x27;float32&#x27;, name=&#x27;lat&#x27;))</pre></div></li><li class='xr-var-item'><div class='xr-index-name'><div>lon</div></div><div class='xr-index-preview'>PandasIndex</div><div></div><input id='index-09cca2f5-569e-4c56-946d-a80095b00bf3' class='xr-index-data-in' type='checkbox'/><label for='index-09cca2f5-569e-4c56-946d-a80095b00bf3' title='Show/Hide index repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-index-data'><pre>PandasIndex(Index([200.0, 202.5, 205.0, 207.5, 210.0, 212.5, 215.0, 217.5, 220.0, 222.5,\n",
-       "       225.0, 227.5, 230.0, 232.5, 235.0, 237.5, 240.0, 242.5, 245.0, 247.5,\n",
-       "       250.0, 252.5, 255.0, 257.5, 260.0, 262.5, 265.0, 267.5, 270.0, 272.5,\n",
-       "       275.0, 277.5, 280.0, 282.5, 285.0, 287.5, 290.0, 292.5, 295.0, 297.5,\n",
-       "       300.0, 302.5, 305.0, 307.5, 310.0, 312.5, 315.0, 317.5, 320.0, 322.5,\n",
-       "       325.0, 327.5, 330.0],\n",
-       "      dtype=&#x27;float32&#x27;, name=&#x27;lon&#x27;))</pre></div></li><li class='xr-var-item'><div class='xr-index-name'><div>time</div></div><div class='xr-index-preview'>PandasIndex</div><div></div><input id='index-ed24752a-e713-49f1-b7c1-4afca526cbbc' class='xr-index-data-in' type='checkbox'/><label for='index-ed24752a-e713-49f1-b7c1-4afca526cbbc' title='Show/Hide index repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-index-data'><pre>PandasIndex(DatetimeIndex([&#x27;2013-01-01 00:00:00&#x27;, &#x27;2013-01-01 06:00:00&#x27;,\n",
-       "               &#x27;2013-01-01 12:00:00&#x27;, &#x27;2013-01-01 18:00:00&#x27;,\n",
-       "               &#x27;2013-01-02 00:00:00&#x27;, &#x27;2013-01-02 06:00:00&#x27;,\n",
-       "               &#x27;2013-01-02 12:00:00&#x27;, &#x27;2013-01-02 18:00:00&#x27;,\n",
-       "               &#x27;2013-01-03 00:00:00&#x27;, &#x27;2013-01-03 06:00:00&#x27;,\n",
-       "               ...\n",
-       "               &#x27;2014-12-29 12:00:00&#x27;, &#x27;2014-12-29 18:00:00&#x27;,\n",
-       "               &#x27;2014-12-30 00:00:00&#x27;, &#x27;2014-12-30 06:00:00&#x27;,\n",
-       "               &#x27;2014-12-30 12:00:00&#x27;, &#x27;2014-12-30 18:00:00&#x27;,\n",
-       "               &#x27;2014-12-31 00:00:00&#x27;, &#x27;2014-12-31 06:00:00&#x27;,\n",
-       "               &#x27;2014-12-31 12:00:00&#x27;, &#x27;2014-12-31 18:00:00&#x27;],\n",
-       "              dtype=&#x27;datetime64[ns]&#x27;, name=&#x27;time&#x27;, length=2920, freq=None))</pre></div></li></ul></div></li><li class='xr-section-item'><input id='section-f3d08f38-c8c9-4b5b-96bd-a60115b1e90e' class='xr-section-summary-in' type='checkbox'  ><label for='section-f3d08f38-c8c9-4b5b-96bd-a60115b1e90e' class='xr-section-summary' >Attributes: <span>(5)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><dl class='xr-attrs'><dt><span>Conventions :</span></dt><dd>COARDS</dd><dt><span>title :</span></dt><dd>4x daily NMC reanalysis (1948)</dd><dt><span>description :</span></dt><dd>Data is from NMC initialized reanalysis\n",
-       "(4x/day).  These are the 0.9950 sigma level values.</dd><dt><span>platform :</span></dt><dd>Model</dd><dt><span>references :</span></dt><dd>http://www.esrl.noaa.gov/psd/data/gridded/data.ncep.reanalysis.html</dd></dl></div></li></ul></div></div>"
-      ],
-      "text/plain": [
-       "<xarray.Dataset>\n",
-       "Dimensions:  (lat: 25, time: 2920, lon: 53)\n",
-       "Coordinates:\n",
-       "  * lat      (lat) float32 75.0 72.5 70.0 67.5 65.0 ... 25.0 22.5 20.0 17.5 15.0\n",
-       "  * lon      (lon) float32 200.0 202.5 205.0 207.5 ... 322.5 325.0 327.5 330.0\n",
-       "  * time     (time) datetime64[ns] 2013-01-01 ... 2014-12-31T18:00:00\n",
-       "Data variables:\n",
-       "    air      (time, lat, lon) float32 241.2 242.5 243.5 ... 296.5 296.2 295.7\n",
-       "Attributes: (5)"
-      ]
-     },
-     "execution_count": 5,
-     "metadata": {},
-     "output_type": "execute_result"
-    }
-   ],
+   "outputs": [],
    "source": [
     "import numpy as np\n",
     "import pandas as pd\n",
@@ -1382,412 +129,14 @@
     "\n",
     "ds = xr.tutorial.load_dataset(\"air_temperature\")\n",
     "da_air = ds.air\n",
-    "ds\n"
+    "ds"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 6,
+   "execution_count": null,
    "metadata": {},
-   "outputs": [
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-       "  stroke: currentColor;\n",
-       "  fill: currentColor;\n",
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-       "</style><pre class='xr-text-repr-fallback'>&lt;xarray.DataArray &#x27;air&#x27; (lat: 4, lon: 3)&gt;\n",
-       "array([[249.79999, 243.09999, 242.39   ],\n",
-       "       [274.29   , 271.79   , 270.6    ],\n",
-       "       [277.4    , 280.6    , 280.9    ],\n",
-       "       [283.19998, 285.5    , 285.9    ]], dtype=float32)\n",
-       "Coordinates:\n",
-       "  * lat      (lat) float32 70.0 65.0 50.0 42.5\n",
-       "  * lon      (lon) float32 202.5 215.0 217.5\n",
-       "    time     datetime64[ns] 2013-01-01\n",
-       "Attributes: (11)</pre><div class='xr-wrap' style='display:none'><div class='xr-header'><div class='xr-obj-type'>xarray.DataArray</div><div class='xr-array-name'>'air'</div><ul class='xr-dim-list'><li><span class='xr-has-index'>lat</span>: 4</li><li><span class='xr-has-index'>lon</span>: 3</li></ul></div><ul class='xr-sections'><li class='xr-section-item'><div class='xr-array-wrap'><input id='section-43ae9f4f-8448-4d8d-b5bc-1f72d25ce34a' class='xr-array-in' type='checkbox' checked><label for='section-43ae9f4f-8448-4d8d-b5bc-1f72d25ce34a' title='Show/hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-array-preview xr-preview'><span>249.8 243.1 242.4 274.3 271.8 270.6 ... 280.6 280.9 283.2 285.5 285.9</span></div><div class='xr-array-data'><pre>array([[249.79999, 243.09999, 242.39   ],\n",
-       "       [274.29   , 271.79   , 270.6    ],\n",
-       "       [277.4    , 280.6    , 280.9    ],\n",
-       "       [283.19998, 285.5    , 285.9    ]], dtype=float32)</pre></div></div></li><li class='xr-section-item'><input id='section-9f8794ad-14e9-4718-b6f7-9d5214046819' class='xr-section-summary-in' type='checkbox'  checked><label for='section-9f8794ad-14e9-4718-b6f7-9d5214046819' class='xr-section-summary' >Coordinates: <span>(3)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'><li class='xr-var-item'><div class='xr-var-name'><span class='xr-has-index'>lat</span></div><div class='xr-var-dims'>(lat)</div><div class='xr-var-dtype'>float32</div><div class='xr-var-preview xr-preview'>70.0 65.0 50.0 42.5</div><input id='attrs-5b4e2b56-c646-4daa-a270-73ecc0002542' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-5b4e2b56-c646-4daa-a270-73ecc0002542' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-fb56ba6f-5fb0-4a04-ab9b-890a08472194' class='xr-var-data-in' type='checkbox'><label for='data-fb56ba6f-5fb0-4a04-ab9b-890a08472194' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>standard_name :</span></dt><dd>latitude</dd><dt><span>long_name :</span></dt><dd>Latitude</dd><dt><span>units :</span></dt><dd>degrees_north</dd><dt><span>axis :</span></dt><dd>Y</dd></dl></div><div class='xr-var-data'><pre>array([70. , 65. , 50. , 42.5], dtype=float32)</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span class='xr-has-index'>lon</span></div><div class='xr-var-dims'>(lon)</div><div class='xr-var-dtype'>float32</div><div class='xr-var-preview xr-preview'>202.5 215.0 217.5</div><input id='attrs-511c6c06-2efe-47e5-9d87-2e7cb0db6e77' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-511c6c06-2efe-47e5-9d87-2e7cb0db6e77' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-b9d5888d-5c57-42c5-af45-182dfcd5afc3' class='xr-var-data-in' type='checkbox'><label for='data-b9d5888d-5c57-42c5-af45-182dfcd5afc3' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>standard_name :</span></dt><dd>longitude</dd><dt><span>long_name :</span></dt><dd>Longitude</dd><dt><span>units :</span></dt><dd>degrees_east</dd><dt><span>axis :</span></dt><dd>X</dd></dl></div><div class='xr-var-data'><pre>array([202.5, 215. , 217.5], dtype=float32)</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>time</span></div><div class='xr-var-dims'>()</div><div class='xr-var-dtype'>datetime64[ns]</div><div class='xr-var-preview xr-preview'>2013-01-01</div><input id='attrs-836be256-4fa6-4c2c-b49e-743f1fb35d3c' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-836be256-4fa6-4c2c-b49e-743f1fb35d3c' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-81eb97c7-b976-436e-9246-020007de0791' class='xr-var-data-in' type='checkbox'><label for='data-81eb97c7-b976-436e-9246-020007de0791' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>standard_name :</span></dt><dd>time</dd><dt><span>long_name :</span></dt><dd>Time</dd></dl></div><div class='xr-var-data'><pre>array(&#x27;2013-01-01T00:00:00.000000000&#x27;, dtype=&#x27;datetime64[ns]&#x27;)</pre></div></li></ul></div></li><li class='xr-section-item'><input id='section-9f9fc6fd-d3db-4796-bc95-4410dc51e4cf' class='xr-section-summary-in' type='checkbox'  ><label for='section-9f9fc6fd-d3db-4796-bc95-4410dc51e4cf' class='xr-section-summary' >Indexes: <span>(2)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'><li class='xr-var-item'><div class='xr-index-name'><div>lat</div></div><div class='xr-index-preview'>PandasIndex</div><div></div><input id='index-35ba622a-a690-45ed-b798-1f3426f94a4c' class='xr-index-data-in' type='checkbox'/><label for='index-35ba622a-a690-45ed-b798-1f3426f94a4c' title='Show/Hide index repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-index-data'><pre>PandasIndex(Index([70.0, 65.0, 50.0, 42.5], dtype=&#x27;float32&#x27;, name=&#x27;lat&#x27;))</pre></div></li><li class='xr-var-item'><div class='xr-index-name'><div>lon</div></div><div class='xr-index-preview'>PandasIndex</div><div></div><input id='index-f0500266-3442-436f-a261-916cdedffe68' class='xr-index-data-in' type='checkbox'/><label for='index-f0500266-3442-436f-a261-916cdedffe68' title='Show/Hide index repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-index-data'><pre>PandasIndex(Index([202.5, 215.0, 217.5], dtype=&#x27;float32&#x27;, name=&#x27;lon&#x27;))</pre></div></li></ul></div></li><li class='xr-section-item'><input id='section-2df09974-49ef-4c94-a528-e26564d0fb6d' class='xr-section-summary-in' type='checkbox'  ><label for='section-2df09974-49ef-4c94-a528-e26564d0fb6d' class='xr-section-summary' >Attributes: <span>(11)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><dl class='xr-attrs'><dt><span>long_name :</span></dt><dd>4xDaily Air temperature at sigma level 995</dd><dt><span>units :</span></dt><dd>degK</dd><dt><span>precision :</span></dt><dd>2</dd><dt><span>GRIB_id :</span></dt><dd>11</dd><dt><span>GRIB_name :</span></dt><dd>TMP</dd><dt><span>var_desc :</span></dt><dd>Air temperature</dd><dt><span>dataset :</span></dt><dd>NMC Reanalysis</dd><dt><span>level_desc :</span></dt><dd>Surface</dd><dt><span>statistic :</span></dt><dd>Individual Obs</dd><dt><span>parent_stat :</span></dt><dd>Other</dd><dt><span>actual_range :</span></dt><dd>[185.16 322.1 ]</dd></dl></div></li></ul></div></div>"
-      ],
-      "text/plain": [
-       "<xarray.DataArray 'air' (lat: 4, lon: 3)>\n",
-       "array([[249.79999, 243.09999, 242.39   ],\n",
-       "       [274.29   , 271.79   , 270.6    ],\n",
-       "       [277.4    , 280.6    , 280.9    ],\n",
-       "       [283.19998, 285.5    , 285.9    ]], dtype=float32)\n",
-       "Coordinates:\n",
-       "  * lat      (lat) float32 70.0 65.0 50.0 42.5\n",
-       "  * lon      (lon) float32 202.5 215.0 217.5\n",
-       "    time     datetime64[ns] 2013-01-01\n",
-       "Attributes: (11)"
-      ]
-     },
-     "execution_count": 6,
-     "metadata": {},
-     "output_type": "execute_result"
-    }
-   ],
+   "outputs": [],
    "source": [
     "selected_da = da_air.isel(time=0, lat=[2, 4, 10, 13], lon=[1, 6, 7])  # -- orthogonal indexing\n",
     "selected_da"
@@ -1811,476 +160,11 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 7,
+   "execution_count": null,
    "metadata": {
     "tags": []
    },
-   "outputs": [
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-       ".xr-no-icon {\n",
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-       "</style><pre class='xr-text-repr-fallback'>&lt;xarray.DataArray &#x27;air&#x27; (time: 2920, degrees_north: 4, degrees_east: 4)&gt;\n",
-       "array([[[293.1    , 293.1    , 293.29   , 293.29   ],\n",
-       "        [284.6    , 284.6    , 284.9    , 284.19998],\n",
-       "        [282.79   , 282.79   , 283.19998, 282.6    ],\n",
-       "        [282.79   , 282.79   , 283.19998, 282.6    ]],\n",
-       "\n",
-       "       [[293.19998, 293.19998, 293.9    , 294.19998],\n",
-       "        [283.29   , 283.29   , 285.19998, 285.19998],\n",
-       "        [281.4    , 281.4    , 282.79   , 283.5    ],\n",
-       "        [281.4    , 281.4    , 282.79   , 283.5    ]],\n",
-       "\n",
-       "       ...,\n",
-       "\n",
-       "       [[288.29   , 288.29   , 289.19   , 290.79   ],\n",
-       "        [282.09   , 282.09   , 281.59   , 282.38998],\n",
-       "        [280.99   , 280.99   , 280.38998, 280.59   ],\n",
-       "        [280.99   , 280.99   , 280.38998, 280.59   ]],\n",
-       "\n",
-       "       [[289.49   , 289.49   , 290.38998, 291.59   ],\n",
-       "        [282.09   , 282.09   , 281.99   , 283.09   ],\n",
-       "        [281.38998, 281.38998, 280.59   , 280.99   ],\n",
-       "        [281.38998, 281.38998, 280.59   , 280.99   ]]], dtype=float32)\n",
-       "Coordinates:\n",
-       "    lat      (degrees_north) float32 30.0 40.0 42.5 42.5\n",
-       "    lon      (degrees_east) float32 200.0 200.0 202.5 205.0\n",
-       "  * time     (time) datetime64[ns] 2013-01-01 ... 2014-12-31T18:00:00\n",
-       "Dimensions without coordinates: degrees_north, degrees_east\n",
-       "Attributes: (11)</pre><div class='xr-wrap' style='display:none'><div class='xr-header'><div class='xr-obj-type'>xarray.DataArray</div><div class='xr-array-name'>'air'</div><ul class='xr-dim-list'><li><span class='xr-has-index'>time</span>: 2920</li><li><span>degrees_north</span>: 4</li><li><span>degrees_east</span>: 4</li></ul></div><ul class='xr-sections'><li class='xr-section-item'><div class='xr-array-wrap'><input id='section-8e636593-202e-4dad-bd1c-9770bfc62be8' class='xr-array-in' type='checkbox' checked><label for='section-8e636593-202e-4dad-bd1c-9770bfc62be8' title='Show/hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-array-preview xr-preview'><span>293.1 293.1 293.3 293.3 284.6 284.6 ... 281.0 281.4 281.4 280.6 281.0</span></div><div class='xr-array-data'><pre>array([[[293.1    , 293.1    , 293.29   , 293.29   ],\n",
-       "        [284.6    , 284.6    , 284.9    , 284.19998],\n",
-       "        [282.79   , 282.79   , 283.19998, 282.6    ],\n",
-       "        [282.79   , 282.79   , 283.19998, 282.6    ]],\n",
-       "\n",
-       "       [[293.19998, 293.19998, 293.9    , 294.19998],\n",
-       "        [283.29   , 283.29   , 285.19998, 285.19998],\n",
-       "        [281.4    , 281.4    , 282.79   , 283.5    ],\n",
-       "        [281.4    , 281.4    , 282.79   , 283.5    ]],\n",
-       "\n",
-       "       ...,\n",
-       "\n",
-       "       [[288.29   , 288.29   , 289.19   , 290.79   ],\n",
-       "        [282.09   , 282.09   , 281.59   , 282.38998],\n",
-       "        [280.99   , 280.99   , 280.38998, 280.59   ],\n",
-       "        [280.99   , 280.99   , 280.38998, 280.59   ]],\n",
-       "\n",
-       "       [[289.49   , 289.49   , 290.38998, 291.59   ],\n",
-       "        [282.09   , 282.09   , 281.99   , 283.09   ],\n",
-       "        [281.38998, 281.38998, 280.59   , 280.99   ],\n",
-       "        [281.38998, 281.38998, 280.59   , 280.99   ]]], dtype=float32)</pre></div></div></li><li class='xr-section-item'><input id='section-e4eacabb-1b32-4339-ba8c-2318c07272ff' class='xr-section-summary-in' type='checkbox'  checked><label for='section-e4eacabb-1b32-4339-ba8c-2318c07272ff' class='xr-section-summary' >Coordinates: <span>(3)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'><li class='xr-var-item'><div class='xr-var-name'><span>lat</span></div><div class='xr-var-dims'>(degrees_north)</div><div class='xr-var-dtype'>float32</div><div class='xr-var-preview xr-preview'>30.0 40.0 42.5 42.5</div><input id='attrs-8ca4a810-ee0a-4497-9d5a-8315e4554386' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-8ca4a810-ee0a-4497-9d5a-8315e4554386' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-eefeba98-4b13-4972-95cf-64f608f7a5f2' class='xr-var-data-in' type='checkbox'><label for='data-eefeba98-4b13-4972-95cf-64f608f7a5f2' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>standard_name :</span></dt><dd>latitude</dd><dt><span>long_name :</span></dt><dd>Latitude</dd><dt><span>units :</span></dt><dd>degrees_north</dd><dt><span>axis :</span></dt><dd>Y</dd></dl></div><div class='xr-var-data'><pre>array([30. , 40. , 42.5, 42.5], dtype=float32)</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>lon</span></div><div class='xr-var-dims'>(degrees_east)</div><div class='xr-var-dtype'>float32</div><div class='xr-var-preview xr-preview'>200.0 200.0 202.5 205.0</div><input id='attrs-1a2111ea-39a5-43a1-b4e0-6b8a64ae9dcc' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-1a2111ea-39a5-43a1-b4e0-6b8a64ae9dcc' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-71b84e49-a3bf-48f7-b267-0d91cdf4afd8' class='xr-var-data-in' type='checkbox'><label for='data-71b84e49-a3bf-48f7-b267-0d91cdf4afd8' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>standard_name :</span></dt><dd>longitude</dd><dt><span>long_name :</span></dt><dd>Longitude</dd><dt><span>units :</span></dt><dd>degrees_east</dd><dt><span>axis :</span></dt><dd>X</dd></dl></div><div class='xr-var-data'><pre>array([200. , 200. , 202.5, 205. ], dtype=float32)</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span class='xr-has-index'>time</span></div><div class='xr-var-dims'>(time)</div><div class='xr-var-dtype'>datetime64[ns]</div><div class='xr-var-preview xr-preview'>2013-01-01 ... 2014-12-31T18:00:00</div><input id='attrs-c962d925-6df3-4147-a1cc-815989f64a39' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-c962d925-6df3-4147-a1cc-815989f64a39' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-aadda4b3-7747-41e9-ba9d-afb6964692d2' class='xr-var-data-in' type='checkbox'><label for='data-aadda4b3-7747-41e9-ba9d-afb6964692d2' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>standard_name :</span></dt><dd>time</dd><dt><span>long_name :</span></dt><dd>Time</dd></dl></div><div class='xr-var-data'><pre>array([&#x27;2013-01-01T00:00:00.000000000&#x27;, &#x27;2013-01-01T06:00:00.000000000&#x27;,\n",
-       "       &#x27;2013-01-01T12:00:00.000000000&#x27;, ..., &#x27;2014-12-31T06:00:00.000000000&#x27;,\n",
-       "       &#x27;2014-12-31T12:00:00.000000000&#x27;, &#x27;2014-12-31T18:00:00.000000000&#x27;],\n",
-       "      dtype=&#x27;datetime64[ns]&#x27;)</pre></div></li></ul></div></li><li class='xr-section-item'><input id='section-43380f57-2ed8-439b-807e-3dabc55530e7' class='xr-section-summary-in' type='checkbox'  ><label for='section-43380f57-2ed8-439b-807e-3dabc55530e7' class='xr-section-summary' >Indexes: <span>(1)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'><li class='xr-var-item'><div class='xr-index-name'><div>time</div></div><div class='xr-index-preview'>PandasIndex</div><div></div><input id='index-8b410424-b034-40b2-89e2-8c40d05d9b27' class='xr-index-data-in' type='checkbox'/><label for='index-8b410424-b034-40b2-89e2-8c40d05d9b27' title='Show/Hide index repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-index-data'><pre>PandasIndex(DatetimeIndex([&#x27;2013-01-01 00:00:00&#x27;, &#x27;2013-01-01 06:00:00&#x27;,\n",
-       "               &#x27;2013-01-01 12:00:00&#x27;, &#x27;2013-01-01 18:00:00&#x27;,\n",
-       "               &#x27;2013-01-02 00:00:00&#x27;, &#x27;2013-01-02 06:00:00&#x27;,\n",
-       "               &#x27;2013-01-02 12:00:00&#x27;, &#x27;2013-01-02 18:00:00&#x27;,\n",
-       "               &#x27;2013-01-03 00:00:00&#x27;, &#x27;2013-01-03 06:00:00&#x27;,\n",
-       "               ...\n",
-       "               &#x27;2014-12-29 12:00:00&#x27;, &#x27;2014-12-29 18:00:00&#x27;,\n",
-       "               &#x27;2014-12-30 00:00:00&#x27;, &#x27;2014-12-30 06:00:00&#x27;,\n",
-       "               &#x27;2014-12-30 12:00:00&#x27;, &#x27;2014-12-30 18:00:00&#x27;,\n",
-       "               &#x27;2014-12-31 00:00:00&#x27;, &#x27;2014-12-31 06:00:00&#x27;,\n",
-       "               &#x27;2014-12-31 12:00:00&#x27;, &#x27;2014-12-31 18:00:00&#x27;],\n",
-       "              dtype=&#x27;datetime64[ns]&#x27;, name=&#x27;time&#x27;, length=2920, freq=None))</pre></div></li></ul></div></li><li class='xr-section-item'><input id='section-c52ccc32-4e54-4a8a-aea0-bebfd55783c2' class='xr-section-summary-in' type='checkbox'  ><label for='section-c52ccc32-4e54-4a8a-aea0-bebfd55783c2' class='xr-section-summary' >Attributes: <span>(11)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><dl class='xr-attrs'><dt><span>long_name :</span></dt><dd>4xDaily Air temperature at sigma level 995</dd><dt><span>units :</span></dt><dd>degK</dd><dt><span>precision :</span></dt><dd>2</dd><dt><span>GRIB_id :</span></dt><dd>11</dd><dt><span>GRIB_name :</span></dt><dd>TMP</dd><dt><span>var_desc :</span></dt><dd>Air temperature</dd><dt><span>dataset :</span></dt><dd>NMC Reanalysis</dd><dt><span>level_desc :</span></dt><dd>Surface</dd><dt><span>statistic :</span></dt><dd>Individual Obs</dd><dt><span>parent_stat :</span></dt><dd>Other</dd><dt><span>actual_range :</span></dt><dd>[185.16 322.1 ]</dd></dl></div></li></ul></div></div>"
-      ],
-      "text/plain": [
-       "<xarray.DataArray 'air' (time: 2920, degrees_north: 4, degrees_east: 4)>\n",
-       "array([[[293.1    , 293.1    , 293.29   , 293.29   ],\n",
-       "        [284.6    , 284.6    , 284.9    , 284.19998],\n",
-       "        [282.79   , 282.79   , 283.19998, 282.6    ],\n",
-       "        [282.79   , 282.79   , 283.19998, 282.6    ]],\n",
-       "\n",
-       "       [[293.19998, 293.19998, 293.9    , 294.19998],\n",
-       "        [283.29   , 283.29   , 285.19998, 285.19998],\n",
-       "        [281.4    , 281.4    , 282.79   , 283.5    ],\n",
-       "        [281.4    , 281.4    , 282.79   , 283.5    ]],\n",
-       "\n",
-       "       ...,\n",
-       "\n",
-       "       [[288.29   , 288.29   , 289.19   , 290.79   ],\n",
-       "        [282.09   , 282.09   , 281.59   , 282.38998],\n",
-       "        [280.99   , 280.99   , 280.38998, 280.59   ],\n",
-       "        [280.99   , 280.99   , 280.38998, 280.59   ]],\n",
-       "\n",
-       "       [[289.49   , 289.49   , 290.38998, 291.59   ],\n",
-       "        [282.09   , 282.09   , 281.99   , 283.09   ],\n",
-       "        [281.38998, 281.38998, 280.59   , 280.99   ],\n",
-       "        [281.38998, 281.38998, 280.59   , 280.99   ]]], dtype=float32)\n",
-       "Coordinates:\n",
-       "    lat      (degrees_north) float32 30.0 40.0 42.5 42.5\n",
-       "    lon      (degrees_east) float32 200.0 200.0 202.5 205.0\n",
-       "  * time     (time) datetime64[ns] 2013-01-01 ... 2014-12-31T18:00:00\n",
-       "Dimensions without coordinates: degrees_north, degrees_east\n",
-       "Attributes: (11)"
-      ]
-     },
-     "execution_count": 7,
-     "metadata": {},
-     "output_type": "execute_result"
-    }
-   ],
+   "outputs": [],
    "source": [
     "target_lat = xr.DataArray([31, 41, 42, 42], dims=\"degrees_north\")\n",
     "target_lon = xr.DataArray([200, 201, 202, 205], dims=\"degrees_east\")\n",
@@ -2319,392 +203,11 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 44,
+   "execution_count": null,
    "metadata": {
     "tags": []
    },
-   "outputs": [
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-       "}\n",
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-       "  min-width: 300px;\n",
-       "  max-width: 700px;\n",
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-       "  margin-bottom: 4px;\n",
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-       "}\n",
-       "\n",
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-       ".xr-header > ul {\n",
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-       "  margin-top: 0;\n",
-       "  margin-bottom: 0;\n",
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-       "\n",
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-       "  color: var(--xr-font-color2);\n",
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-       "  display: grid;\n",
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-       "  display: contents;\n",
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-       "\n",
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-       "  display: none;\n",
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-       "  color: var(--xr-disabled-color);\n",
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-       "\n",
-       ".xr-section-item input:enabled + label {\n",
-       "  cursor: pointer;\n",
-       "  color: var(--xr-font-color2);\n",
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-       "  color: var(--xr-font-color2);\n",
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-       "\n",
-       ".xr-attrs dt {\n",
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-       "}\n",
-       "\n",
-       ".xr-attrs dt:hover span {\n",
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-       "  background: var(--xr-background-color);\n",
-       "  padding-right: 10px;\n",
-       "}\n",
-       "\n",
-       ".xr-attrs dd {\n",
-       "  grid-column: 2;\n",
-       "  white-space: pre-wrap;\n",
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-       "}\n",
-       "\n",
-       ".xr-icon-database,\n",
-       ".xr-icon-file-text2,\n",
-       ".xr-no-icon {\n",
-       "  display: inline-block;\n",
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-       "  stroke-width: 0;\n",
-       "  stroke: currentColor;\n",
-       "  fill: currentColor;\n",
-       "}\n",
-       "</style><pre class='xr-text-repr-fallback'>&lt;xarray.DataArray (points: 4)&gt;\n",
-       "array([31, 41, 42, 42])\n",
-       "Dimensions without coordinates: points</pre><div class='xr-wrap' style='display:none'><div class='xr-header'><div class='xr-obj-type'>xarray.DataArray</div><div class='xr-array-name'></div><ul class='xr-dim-list'><li><span>points</span>: 4</li></ul></div><ul class='xr-sections'><li class='xr-section-item'><div class='xr-array-wrap'><input id='section-7accee19-1189-4507-a052-15b93b2e1449' class='xr-array-in' type='checkbox' checked><label for='section-7accee19-1189-4507-a052-15b93b2e1449' title='Show/hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-array-preview xr-preview'><span>31 41 42 42</span></div><div class='xr-array-data'><pre>array([31, 41, 42, 42])</pre></div></div></li><li class='xr-section-item'><input id='section-aa11cff3-53b0-4c91-8401-24927ea3f967' class='xr-section-summary-in' type='checkbox' disabled ><label for='section-aa11cff3-53b0-4c91-8401-24927ea3f967' class='xr-section-summary'  title='Expand/collapse section'>Coordinates: <span>(0)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'></ul></div></li><li class='xr-section-item'><input id='section-a5063e98-5a6a-455f-aaa9-61ebdf8fcc43' class='xr-section-summary-in' type='checkbox' disabled ><label for='section-a5063e98-5a6a-455f-aaa9-61ebdf8fcc43' class='xr-section-summary'  title='Expand/collapse section'>Indexes: <span>(0)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'></ul></div></li><li class='xr-section-item'><input id='section-cb465474-1f5e-4899-bb93-3a24ea369eff' class='xr-section-summary-in' type='checkbox' disabled ><label for='section-cb465474-1f5e-4899-bb93-3a24ea369eff' class='xr-section-summary'  title='Expand/collapse section'>Attributes: <span>(0)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><dl class='xr-attrs'></dl></div></li></ul></div></div>"
-      ],
-      "text/plain": [
-       "<xarray.DataArray (points: 4)>\n",
-       "array([31, 41, 42, 42])\n",
-       "Dimensions without coordinates: points"
-      ]
-     },
-     "execution_count": 44,
-     "metadata": {},
-     "output_type": "execute_result"
-    }
-   ],
+   "outputs": [],
    "source": [
     "# Define target latitude and longitude (where weather stations might be)\n",
     "lat_points = xr.DataArray([31, 41, 42, 42], dims=\"points\")\n",
@@ -2713,392 +216,11 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 45,
+   "execution_count": null,
    "metadata": {
     "tags": []
    },
-   "outputs": [
-    {
-     "data": {
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-       ".xr-section-details {\n",
-       "  display: none;\n",
-       "  grid-column: 1 / -1;\n",
-       "  margin-bottom: 5px;\n",
-       "}\n",
-       "\n",
-       ".xr-section-summary-in:checked ~ .xr-section-details {\n",
-       "  display: contents;\n",
-       "}\n",
-       "\n",
-       ".xr-array-wrap {\n",
-       "  grid-column: 1 / -1;\n",
-       "  display: grid;\n",
-       "  grid-template-columns: 20px auto;\n",
-       "}\n",
-       "\n",
-       ".xr-array-wrap > label {\n",
-       "  grid-column: 1;\n",
-       "  vertical-align: top;\n",
-       "}\n",
-       "\n",
-       ".xr-preview {\n",
-       "  color: var(--xr-font-color3);\n",
-       "}\n",
-       "\n",
-       ".xr-array-preview,\n",
-       ".xr-array-data {\n",
-       "  padding: 0 5px !important;\n",
-       "  grid-column: 2;\n",
-       "}\n",
-       "\n",
-       ".xr-array-data,\n",
-       ".xr-array-in:checked ~ .xr-array-preview {\n",
-       "  display: none;\n",
-       "}\n",
-       "\n",
-       ".xr-array-in:checked ~ .xr-array-data,\n",
-       ".xr-array-preview {\n",
-       "  display: inline-block;\n",
-       "}\n",
-       "\n",
-       ".xr-dim-list {\n",
-       "  display: inline-block !important;\n",
-       "  list-style: none;\n",
-       "  padding: 0 !important;\n",
-       "  margin: 0;\n",
-       "}\n",
-       "\n",
-       ".xr-dim-list li {\n",
-       "  display: inline-block;\n",
-       "  padding: 0;\n",
-       "  margin: 0;\n",
-       "}\n",
-       "\n",
-       ".xr-dim-list:before {\n",
-       "  content: '(';\n",
-       "}\n",
-       "\n",
-       ".xr-dim-list:after {\n",
-       "  content: ')';\n",
-       "}\n",
-       "\n",
-       ".xr-dim-list li:not(:last-child):after {\n",
-       "  content: ',';\n",
-       "  padding-right: 5px;\n",
-       "}\n",
-       "\n",
-       ".xr-has-index {\n",
-       "  font-weight: bold;\n",
-       "}\n",
-       "\n",
-       ".xr-var-list,\n",
-       ".xr-var-item {\n",
-       "  display: contents;\n",
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-       ".xr-var-item > .xr-var-name span {\n",
-       "  background-color: var(--xr-background-color-row-even);\n",
-       "  margin-bottom: 0;\n",
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-       "\n",
-       ".xr-var-item > .xr-var-name:hover span {\n",
-       "  padding-right: 5px;\n",
-       "}\n",
-       "\n",
-       ".xr-var-list > li:nth-child(odd) > div,\n",
-       ".xr-var-list > li:nth-child(odd) > label,\n",
-       ".xr-var-list > li:nth-child(odd) > .xr-var-name span {\n",
-       "  background-color: var(--xr-background-color-row-odd);\n",
-       "}\n",
-       "\n",
-       ".xr-var-name {\n",
-       "  grid-column: 1;\n",
-       "}\n",
-       "\n",
-       ".xr-var-dims {\n",
-       "  grid-column: 2;\n",
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-       "\n",
-       ".xr-var-dtype {\n",
-       "  grid-column: 3;\n",
-       "  text-align: right;\n",
-       "  color: var(--xr-font-color2);\n",
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-       "\n",
-       ".xr-var-preview {\n",
-       "  grid-column: 4;\n",
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-       "\n",
-       ".xr-index-preview {\n",
-       "  grid-column: 2 / 5;\n",
-       "  color: var(--xr-font-color2);\n",
-       "}\n",
-       "\n",
-       ".xr-var-name,\n",
-       ".xr-var-dims,\n",
-       ".xr-var-dtype,\n",
-       ".xr-preview,\n",
-       ".xr-attrs dt {\n",
-       "  white-space: nowrap;\n",
-       "  overflow: hidden;\n",
-       "  text-overflow: ellipsis;\n",
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-       "\n",
-       ".xr-var-name:hover,\n",
-       ".xr-var-dims:hover,\n",
-       ".xr-var-dtype:hover,\n",
-       ".xr-attrs dt:hover {\n",
-       "  overflow: visible;\n",
-       "  width: auto;\n",
-       "  z-index: 1;\n",
-       "}\n",
-       "\n",
-       ".xr-var-attrs,\n",
-       ".xr-var-data,\n",
-       ".xr-index-data {\n",
-       "  display: none;\n",
-       "  background-color: var(--xr-background-color) !important;\n",
-       "  padding-bottom: 5px !important;\n",
-       "}\n",
-       "\n",
-       ".xr-var-attrs-in:checked ~ .xr-var-attrs,\n",
-       ".xr-var-data-in:checked ~ .xr-var-data,\n",
-       ".xr-index-data-in:checked ~ .xr-index-data {\n",
-       "  display: block;\n",
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-       "\n",
-       ".xr-var-data > table {\n",
-       "  float: right;\n",
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-       "\n",
-       ".xr-var-name span,\n",
-       ".xr-var-data,\n",
-       ".xr-index-name div,\n",
-       ".xr-index-data,\n",
-       ".xr-attrs {\n",
-       "  padding-left: 25px !important;\n",
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-       "\n",
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-       ".xr-index-data {\n",
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-       "\n",
-       "dl.xr-attrs {\n",
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-       "  display: grid;\n",
-       "  grid-template-columns: 125px auto;\n",
-       "}\n",
-       "\n",
-       ".xr-attrs dt,\n",
-       ".xr-attrs dd {\n",
-       "  padding: 0;\n",
-       "  margin: 0;\n",
-       "  float: left;\n",
-       "  padding-right: 10px;\n",
-       "  width: auto;\n",
-       "}\n",
-       "\n",
-       ".xr-attrs dt {\n",
-       "  font-weight: normal;\n",
-       "  grid-column: 1;\n",
-       "}\n",
-       "\n",
-       ".xr-attrs dt:hover span {\n",
-       "  display: inline-block;\n",
-       "  background: var(--xr-background-color);\n",
-       "  padding-right: 10px;\n",
-       "}\n",
-       "\n",
-       ".xr-attrs dd {\n",
-       "  grid-column: 2;\n",
-       "  white-space: pre-wrap;\n",
-       "  word-break: break-all;\n",
-       "}\n",
-       "\n",
-       ".xr-icon-database,\n",
-       ".xr-icon-file-text2,\n",
-       ".xr-no-icon {\n",
-       "  display: inline-block;\n",
-       "  vertical-align: middle;\n",
-       "  width: 1em;\n",
-       "  height: 1.5em !important;\n",
-       "  stroke-width: 0;\n",
-       "  stroke: currentColor;\n",
-       "  fill: currentColor;\n",
-       "}\n",
-       "</style><pre class='xr-text-repr-fallback'>&lt;xarray.DataArray (points: 4)&gt;\n",
-       "array([200, 201, 202, 205])\n",
-       "Dimensions without coordinates: points</pre><div class='xr-wrap' style='display:none'><div class='xr-header'><div class='xr-obj-type'>xarray.DataArray</div><div class='xr-array-name'></div><ul class='xr-dim-list'><li><span>points</span>: 4</li></ul></div><ul class='xr-sections'><li class='xr-section-item'><div class='xr-array-wrap'><input id='section-6dc7e7a8-a584-4546-9efe-04d6763e8046' class='xr-array-in' type='checkbox' checked><label for='section-6dc7e7a8-a584-4546-9efe-04d6763e8046' title='Show/hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-array-preview xr-preview'><span>200 201 202 205</span></div><div class='xr-array-data'><pre>array([200, 201, 202, 205])</pre></div></div></li><li class='xr-section-item'><input id='section-68eeaafa-d3ed-4f45-b871-8550857cef4d' class='xr-section-summary-in' type='checkbox' disabled ><label for='section-68eeaafa-d3ed-4f45-b871-8550857cef4d' class='xr-section-summary'  title='Expand/collapse section'>Coordinates: <span>(0)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'></ul></div></li><li class='xr-section-item'><input id='section-73c3f5a0-ad03-438b-b55b-374f4dad2f6b' class='xr-section-summary-in' type='checkbox' disabled ><label for='section-73c3f5a0-ad03-438b-b55b-374f4dad2f6b' class='xr-section-summary'  title='Expand/collapse section'>Indexes: <span>(0)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'></ul></div></li><li class='xr-section-item'><input id='section-433f3d78-6eef-48bc-8cbc-9eb3eacac871' class='xr-section-summary-in' type='checkbox' disabled ><label for='section-433f3d78-6eef-48bc-8cbc-9eb3eacac871' class='xr-section-summary'  title='Expand/collapse section'>Attributes: <span>(0)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><dl class='xr-attrs'></dl></div></li></ul></div></div>"
-      ],
-      "text/plain": [
-       "<xarray.DataArray (points: 4)>\n",
-       "array([200, 201, 202, 205])\n",
-       "Dimensions without coordinates: points"
-      ]
-     },
-     "execution_count": 45,
-     "metadata": {},
-     "output_type": "execute_result"
-    }
-   ],
+   "outputs": [],
    "source": [
     "lon_points = xr.DataArray([200, 201, 202, 205], dims=\"points\")\n",
     "lon_points"
@@ -3113,428 +235,11 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 23,
+   "execution_count": null,
    "metadata": {
     "tags": []
    },
-   "outputs": [
-    {
-     "data": {
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-       "\n",
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-       "  display: inline;\n",
-       "  margin-top: 0;\n",
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-       "</style><pre class='xr-text-repr-fallback'>&lt;xarray.DataArray &#x27;air&#x27; (time: 2920, points: 4)&gt;\n",
-       "array([[293.1    , 284.6    , 283.19998, 282.6    ],\n",
-       "       [293.19998, 283.29   , 282.79   , 283.5    ],\n",
-       "       ...,\n",
-       "       [288.29   , 282.09   , 280.38998, 280.59   ],\n",
-       "       [289.49   , 282.09   , 280.59   , 280.99   ]], dtype=float32)\n",
-       "Coordinates:\n",
-       "    lat      (points) float32 30.0 40.0 42.5 42.5\n",
-       "    lon      (points) float32 200.0 200.0 202.5 205.0\n",
-       "  * time     (time) datetime64[ns] 2013-01-01 ... 2014-12-31T18:00:00\n",
-       "Dimensions without coordinates: points\n",
-       "Attributes: (11)</pre><div class='xr-wrap' style='display:none'><div class='xr-header'><div class='xr-obj-type'>xarray.DataArray</div><div class='xr-array-name'>'air'</div><ul class='xr-dim-list'><li><span class='xr-has-index'>time</span>: 2920</li><li><span>points</span>: 4</li></ul></div><ul class='xr-sections'><li class='xr-section-item'><div class='xr-array-wrap'><input id='section-9ba7cfb7-8c21-4447-8d06-e3ca61612923' class='xr-array-in' type='checkbox' checked><label for='section-9ba7cfb7-8c21-4447-8d06-e3ca61612923' title='Show/hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-array-preview xr-preview'><span>293.1 284.6 283.2 282.6 293.2 283.3 ... 280.6 289.5 282.1 280.6 281.0</span></div><div class='xr-array-data'><pre>array([[293.1    , 284.6    , 283.19998, 282.6    ],\n",
-       "       [293.19998, 283.29   , 282.79   , 283.5    ],\n",
-       "       ...,\n",
-       "       [288.29   , 282.09   , 280.38998, 280.59   ],\n",
-       "       [289.49   , 282.09   , 280.59   , 280.99   ]], dtype=float32)</pre></div></div></li><li class='xr-section-item'><input id='section-6e1a4d08-4e47-41a1-a2ec-f973aa28c6b1' class='xr-section-summary-in' type='checkbox'  checked><label for='section-6e1a4d08-4e47-41a1-a2ec-f973aa28c6b1' class='xr-section-summary' >Coordinates: <span>(3)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'><li class='xr-var-item'><div class='xr-var-name'><span>lat</span></div><div class='xr-var-dims'>(points)</div><div class='xr-var-dtype'>float32</div><div class='xr-var-preview xr-preview'>30.0 40.0 42.5 42.5</div><input id='attrs-926aae7e-d864-4950-8738-1b3e3b7323c4' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-926aae7e-d864-4950-8738-1b3e3b7323c4' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-6cdb3e40-220b-4c7c-9e0a-3b69f13de716' class='xr-var-data-in' type='checkbox'><label for='data-6cdb3e40-220b-4c7c-9e0a-3b69f13de716' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>standard_name :</span></dt><dd>latitude</dd><dt><span>long_name :</span></dt><dd>Latitude</dd><dt><span>units :</span></dt><dd>degrees_north</dd><dt><span>axis :</span></dt><dd>Y</dd></dl></div><div class='xr-var-data'><pre>array([30. , 40. , 42.5, 42.5], dtype=float32)</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>lon</span></div><div class='xr-var-dims'>(points)</div><div class='xr-var-dtype'>float32</div><div class='xr-var-preview xr-preview'>200.0 200.0 202.5 205.0</div><input id='attrs-47ca22ff-9bd9-461a-b7d8-641fb2114cdb' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-47ca22ff-9bd9-461a-b7d8-641fb2114cdb' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-443b14a8-a2b8-43b4-8a27-28bb6954d454' class='xr-var-data-in' type='checkbox'><label for='data-443b14a8-a2b8-43b4-8a27-28bb6954d454' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>standard_name :</span></dt><dd>longitude</dd><dt><span>long_name :</span></dt><dd>Longitude</dd><dt><span>units :</span></dt><dd>degrees_east</dd><dt><span>axis :</span></dt><dd>X</dd></dl></div><div class='xr-var-data'><pre>array([200. , 200. , 202.5, 205. ], dtype=float32)</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span class='xr-has-index'>time</span></div><div class='xr-var-dims'>(time)</div><div class='xr-var-dtype'>datetime64[ns]</div><div class='xr-var-preview xr-preview'>2013-01-01 ... 2014-12-31T18:00:00</div><input id='attrs-ee228036-1bfd-4f0d-80c2-a5ce4db1a825' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-ee228036-1bfd-4f0d-80c2-a5ce4db1a825' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-36625a98-ddce-4ac1-b8ba-2e5a997fa89e' class='xr-var-data-in' type='checkbox'><label for='data-36625a98-ddce-4ac1-b8ba-2e5a997fa89e' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>standard_name :</span></dt><dd>time</dd><dt><span>long_name :</span></dt><dd>Time</dd></dl></div><div class='xr-var-data'><pre>array([&#x27;2013-01-01T00:00:00.000000000&#x27;, &#x27;2013-01-01T06:00:00.000000000&#x27;,\n",
-       "       &#x27;2013-01-01T12:00:00.000000000&#x27;, ..., &#x27;2014-12-31T06:00:00.000000000&#x27;,\n",
-       "       &#x27;2014-12-31T12:00:00.000000000&#x27;, &#x27;2014-12-31T18:00:00.000000000&#x27;],\n",
-       "      dtype=&#x27;datetime64[ns]&#x27;)</pre></div></li></ul></div></li><li class='xr-section-item'><input id='section-3624f481-29b9-46cc-aa48-4dd75eba8c8f' class='xr-section-summary-in' type='checkbox'  ><label for='section-3624f481-29b9-46cc-aa48-4dd75eba8c8f' class='xr-section-summary' >Indexes: <span>(1)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'><li class='xr-var-item'><div class='xr-index-name'><div>time</div></div><div class='xr-index-preview'>PandasIndex</div><div></div><input id='index-0b3a7f91-3b69-4a30-ad48-83d198109002' class='xr-index-data-in' type='checkbox'/><label for='index-0b3a7f91-3b69-4a30-ad48-83d198109002' title='Show/Hide index repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-index-data'><pre>PandasIndex(DatetimeIndex([&#x27;2013-01-01 00:00:00&#x27;, &#x27;2013-01-01 06:00:00&#x27;,\n",
-       "               &#x27;2013-01-01 12:00:00&#x27;, &#x27;2013-01-01 18:00:00&#x27;,\n",
-       "               &#x27;2013-01-02 00:00:00&#x27;, &#x27;2013-01-02 06:00:00&#x27;,\n",
-       "               &#x27;2013-01-02 12:00:00&#x27;, &#x27;2013-01-02 18:00:00&#x27;,\n",
-       "               &#x27;2013-01-03 00:00:00&#x27;, &#x27;2013-01-03 06:00:00&#x27;,\n",
-       "               ...\n",
-       "               &#x27;2014-12-29 12:00:00&#x27;, &#x27;2014-12-29 18:00:00&#x27;,\n",
-       "               &#x27;2014-12-30 00:00:00&#x27;, &#x27;2014-12-30 06:00:00&#x27;,\n",
-       "               &#x27;2014-12-30 12:00:00&#x27;, &#x27;2014-12-30 18:00:00&#x27;,\n",
-       "               &#x27;2014-12-31 00:00:00&#x27;, &#x27;2014-12-31 06:00:00&#x27;,\n",
-       "               &#x27;2014-12-31 12:00:00&#x27;, &#x27;2014-12-31 18:00:00&#x27;],\n",
-       "              dtype=&#x27;datetime64[ns]&#x27;, name=&#x27;time&#x27;, length=2920, freq=None))</pre></div></li></ul></div></li><li class='xr-section-item'><input id='section-b7b497f8-c3fb-4138-9acd-a068ef419f91' class='xr-section-summary-in' type='checkbox'  ><label for='section-b7b497f8-c3fb-4138-9acd-a068ef419f91' class='xr-section-summary' >Attributes: <span>(11)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><dl class='xr-attrs'><dt><span>long_name :</span></dt><dd>4xDaily Air temperature at sigma level 995</dd><dt><span>units :</span></dt><dd>degK</dd><dt><span>precision :</span></dt><dd>2</dd><dt><span>GRIB_id :</span></dt><dd>11</dd><dt><span>GRIB_name :</span></dt><dd>TMP</dd><dt><span>var_desc :</span></dt><dd>Air temperature</dd><dt><span>dataset :</span></dt><dd>NMC Reanalysis</dd><dt><span>level_desc :</span></dt><dd>Surface</dd><dt><span>statistic :</span></dt><dd>Individual Obs</dd><dt><span>parent_stat :</span></dt><dd>Other</dd><dt><span>actual_range :</span></dt><dd>[185.16 322.1 ]</dd></dl></div></li></ul></div></div>"
-      ],
-      "text/plain": [
-       "<xarray.DataArray 'air' (time: 2920, points: 4)>\n",
-       "array([[293.1    , 284.6    , 283.19998, 282.6    ],\n",
-       "       [293.19998, 283.29   , 282.79   , 283.5    ],\n",
-       "       ...,\n",
-       "       [288.29   , 282.09   , 280.38998, 280.59   ],\n",
-       "       [289.49   , 282.09   , 280.59   , 280.99   ]], dtype=float32)\n",
-       "Coordinates:\n",
-       "    lat      (points) float32 30.0 40.0 42.5 42.5\n",
-       "    lon      (points) float32 200.0 200.0 202.5 205.0\n",
-       "  * time     (time) datetime64[ns] 2013-01-01 ... 2014-12-31T18:00:00\n",
-       "Dimensions without coordinates: points\n",
-       "Attributes: (11)"
-      ]
-     },
-     "execution_count": 23,
-     "metadata": {},
-     "output_type": "execute_result"
-    }
-   ],
+   "outputs": [],
    "source": [
     "da_air.sel(lat=lat_points, lon=lon_points, method=\"nearest\")"
    ]
@@ -3548,22 +253,11 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 24,
+   "execution_count": null,
    "metadata": {
     "tags": []
    },
-   "outputs": [
-    {
-     "data": {
-      "text/plain": [
-       "('time', 'points')"
-      ]
-     },
-     "execution_count": 24,
-     "metadata": {},
-     "output_type": "execute_result"
-    }
-   ],
+   "outputs": [],
    "source": [
     "da_air.sel(lat=lat_points, lon=lon_points, method=\"nearest\").dims"
    ]
@@ -3581,464 +275,11 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 43,
+   "execution_count": null,
    "metadata": {
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-       "  padding-left: 0.5em;\n",
-       "}\n",
-       "\n",
-       ".xr-section-summary-in:disabled + label {\n",
-       "  color: var(--xr-font-color2);\n",
-       "}\n",
-       "\n",
-       ".xr-section-summary-in + label:before {\n",
-       "  display: inline-block;\n",
-       "  content: '►';\n",
-       "  font-size: 11px;\n",
-       "  width: 15px;\n",
-       "  text-align: center;\n",
-       "}\n",
-       "\n",
-       ".xr-section-summary-in:disabled + label:before {\n",
-       "  color: var(--xr-disabled-color);\n",
-       "}\n",
-       "\n",
-       ".xr-section-summary-in:checked + label:before {\n",
-       "  content: '▼';\n",
-       "}\n",
-       "\n",
-       ".xr-section-summary-in:checked + label > span {\n",
-       "  display: none;\n",
-       "}\n",
-       "\n",
-       ".xr-section-summary,\n",
-       ".xr-section-inline-details {\n",
-       "  padding-top: 4px;\n",
-       "  padding-bottom: 4px;\n",
-       "}\n",
-       "\n",
-       ".xr-section-inline-details {\n",
-       "  grid-column: 2 / -1;\n",
-       "}\n",
-       "\n",
-       ".xr-section-details {\n",
-       "  display: none;\n",
-       "  grid-column: 1 / -1;\n",
-       "  margin-bottom: 5px;\n",
-       "}\n",
-       "\n",
-       ".xr-section-summary-in:checked ~ .xr-section-details {\n",
-       "  display: contents;\n",
-       "}\n",
-       "\n",
-       ".xr-array-wrap {\n",
-       "  grid-column: 1 / -1;\n",
-       "  display: grid;\n",
-       "  grid-template-columns: 20px auto;\n",
-       "}\n",
-       "\n",
-       ".xr-array-wrap > label {\n",
-       "  grid-column: 1;\n",
-       "  vertical-align: top;\n",
-       "}\n",
-       "\n",
-       ".xr-preview {\n",
-       "  color: var(--xr-font-color3);\n",
-       "}\n",
-       "\n",
-       ".xr-array-preview,\n",
-       ".xr-array-data {\n",
-       "  padding: 0 5px !important;\n",
-       "  grid-column: 2;\n",
-       "}\n",
-       "\n",
-       ".xr-array-data,\n",
-       ".xr-array-in:checked ~ .xr-array-preview {\n",
-       "  display: none;\n",
-       "}\n",
-       "\n",
-       ".xr-array-in:checked ~ .xr-array-data,\n",
-       ".xr-array-preview {\n",
-       "  display: inline-block;\n",
-       "}\n",
-       "\n",
-       ".xr-dim-list {\n",
-       "  display: inline-block !important;\n",
-       "  list-style: none;\n",
-       "  padding: 0 !important;\n",
-       "  margin: 0;\n",
-       "}\n",
-       "\n",
-       ".xr-dim-list li {\n",
-       "  display: inline-block;\n",
-       "  padding: 0;\n",
-       "  margin: 0;\n",
-       "}\n",
-       "\n",
-       ".xr-dim-list:before {\n",
-       "  content: '(';\n",
-       "}\n",
-       "\n",
-       ".xr-dim-list:after {\n",
-       "  content: ')';\n",
-       "}\n",
-       "\n",
-       ".xr-dim-list li:not(:last-child):after {\n",
-       "  content: ',';\n",
-       "  padding-right: 5px;\n",
-       "}\n",
-       "\n",
-       ".xr-has-index {\n",
-       "  font-weight: bold;\n",
-       "}\n",
-       "\n",
-       ".xr-var-list,\n",
-       ".xr-var-item {\n",
-       "  display: contents;\n",
-       "}\n",
-       "\n",
-       ".xr-var-item > div,\n",
-       ".xr-var-item label,\n",
-       ".xr-var-item > .xr-var-name span {\n",
-       "  background-color: var(--xr-background-color-row-even);\n",
-       "  margin-bottom: 0;\n",
-       "}\n",
-       "\n",
-       ".xr-var-item > .xr-var-name:hover span {\n",
-       "  padding-right: 5px;\n",
-       "}\n",
-       "\n",
-       ".xr-var-list > li:nth-child(odd) > div,\n",
-       ".xr-var-list > li:nth-child(odd) > label,\n",
-       ".xr-var-list > li:nth-child(odd) > .xr-var-name span {\n",
-       "  background-color: var(--xr-background-color-row-odd);\n",
-       "}\n",
-       "\n",
-       ".xr-var-name {\n",
-       "  grid-column: 1;\n",
-       "}\n",
-       "\n",
-       ".xr-var-dims {\n",
-       "  grid-column: 2;\n",
-       "}\n",
-       "\n",
-       ".xr-var-dtype {\n",
-       "  grid-column: 3;\n",
-       "  text-align: right;\n",
-       "  color: var(--xr-font-color2);\n",
-       "}\n",
-       "\n",
-       ".xr-var-preview {\n",
-       "  grid-column: 4;\n",
-       "}\n",
-       "\n",
-       ".xr-index-preview {\n",
-       "  grid-column: 2 / 5;\n",
-       "  color: var(--xr-font-color2);\n",
-       "}\n",
-       "\n",
-       ".xr-var-name,\n",
-       ".xr-var-dims,\n",
-       ".xr-var-dtype,\n",
-       ".xr-preview,\n",
-       ".xr-attrs dt {\n",
-       "  white-space: nowrap;\n",
-       "  overflow: hidden;\n",
-       "  text-overflow: ellipsis;\n",
-       "  padding-right: 10px;\n",
-       "}\n",
-       "\n",
-       ".xr-var-name:hover,\n",
-       ".xr-var-dims:hover,\n",
-       ".xr-var-dtype:hover,\n",
-       ".xr-attrs dt:hover {\n",
-       "  overflow: visible;\n",
-       "  width: auto;\n",
-       "  z-index: 1;\n",
-       "}\n",
-       "\n",
-       ".xr-var-attrs,\n",
-       ".xr-var-data,\n",
-       ".xr-index-data {\n",
-       "  display: none;\n",
-       "  background-color: var(--xr-background-color) !important;\n",
-       "  padding-bottom: 5px !important;\n",
-       "}\n",
-       "\n",
-       ".xr-var-attrs-in:checked ~ .xr-var-attrs,\n",
-       ".xr-var-data-in:checked ~ .xr-var-data,\n",
-       ".xr-index-data-in:checked ~ .xr-index-data {\n",
-       "  display: block;\n",
-       "}\n",
-       "\n",
-       ".xr-var-data > table {\n",
-       "  float: right;\n",
-       "}\n",
-       "\n",
-       ".xr-var-name span,\n",
-       ".xr-var-data,\n",
-       ".xr-index-name div,\n",
-       ".xr-index-data,\n",
-       ".xr-attrs {\n",
-       "  padding-left: 25px !important;\n",
-       "}\n",
-       "\n",
-       ".xr-attrs,\n",
-       ".xr-var-attrs,\n",
-       ".xr-var-data,\n",
-       ".xr-index-data {\n",
-       "  grid-column: 1 / -1;\n",
-       "}\n",
-       "\n",
-       "dl.xr-attrs {\n",
-       "  padding: 0;\n",
-       "  margin: 0;\n",
-       "  display: grid;\n",
-       "  grid-template-columns: 125px auto;\n",
-       "}\n",
-       "\n",
-       ".xr-attrs dt,\n",
-       ".xr-attrs dd {\n",
-       "  padding: 0;\n",
-       "  margin: 0;\n",
-       "  float: left;\n",
-       "  padding-right: 10px;\n",
-       "  width: auto;\n",
-       "}\n",
-       "\n",
-       ".xr-attrs dt {\n",
-       "  font-weight: normal;\n",
-       "  grid-column: 1;\n",
-       "}\n",
-       "\n",
-       ".xr-attrs dt:hover span {\n",
-       "  display: inline-block;\n",
-       "  background: var(--xr-background-color);\n",
-       "  padding-right: 10px;\n",
-       "}\n",
-       "\n",
-       ".xr-attrs dd {\n",
-       "  grid-column: 2;\n",
-       "  white-space: pre-wrap;\n",
-       "  word-break: break-all;\n",
-       "}\n",
-       "\n",
-       ".xr-icon-database,\n",
-       ".xr-icon-file-text2,\n",
-       ".xr-no-icon {\n",
-       "  display: inline-block;\n",
-       "  vertical-align: middle;\n",
-       "  width: 1em;\n",
-       "  height: 1.5em !important;\n",
-       "  stroke-width: 0;\n",
-       "  stroke: currentColor;\n",
-       "  fill: currentColor;\n",
-       "}\n",
-       "</style><pre class='xr-text-repr-fallback'>&lt;xarray.DataArray &#x27;air&#x27; (time: 2920, lat: 3, points: 4)&gt;\n",
-       "array([[[296.6    , 296.6    , 296.19998, 296.4    ],\n",
-       "        [293.1    , 293.1    , 293.29   , 293.29   ],\n",
-       "        [284.6    , 284.6    , 284.9    , 284.19998]],\n",
-       "\n",
-       "       [[296.4    , 296.4    , 295.9    , 296.19998],\n",
-       "        [293.19998, 293.19998, 293.9    , 294.19998],\n",
-       "        [283.29   , 283.29   , 285.19998, 285.19998]],\n",
-       "\n",
-       "       ...,\n",
-       "\n",
-       "       [[293.69   , 293.69   , 293.88998, 295.38998],\n",
-       "        [288.29   , 288.29   , 289.19   , 290.79   ],\n",
-       "        [282.09   , 282.09   , 281.59   , 282.38998]],\n",
-       "\n",
-       "       [[293.79   , 293.79   , 293.69   , 295.09   ],\n",
-       "        [289.49   , 289.49   , 290.38998, 291.59   ],\n",
-       "        [282.09   , 282.09   , 281.99   , 283.09   ]]], dtype=float32)\n",
-       "Coordinates:\n",
-       "  * lat      (lat) float32 20.0 30.0 40.0\n",
-       "    lon      (points) float32 200.0 200.0 202.5 205.0\n",
-       "  * time     (time) datetime64[ns] 2013-01-01 ... 2014-12-31T18:00:00\n",
-       "Dimensions without coordinates: points\n",
-       "Attributes: (11)</pre><div class='xr-wrap' style='display:none'><div class='xr-header'><div class='xr-obj-type'>xarray.DataArray</div><div class='xr-array-name'>'air'</div><ul class='xr-dim-list'><li><span class='xr-has-index'>time</span>: 2920</li><li><span class='xr-has-index'>lat</span>: 3</li><li><span>points</span>: 4</li></ul></div><ul class='xr-sections'><li class='xr-section-item'><div class='xr-array-wrap'><input id='section-12ad8a8c-383a-4b01-a20a-756221cd4fed' class='xr-array-in' type='checkbox' checked><label for='section-12ad8a8c-383a-4b01-a20a-756221cd4fed' title='Show/hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-array-preview xr-preview'><span>296.6 296.6 296.2 296.4 293.1 293.1 ... 291.6 282.1 282.1 282.0 283.1</span></div><div class='xr-array-data'><pre>array([[[296.6    , 296.6    , 296.19998, 296.4    ],\n",
-       "        [293.1    , 293.1    , 293.29   , 293.29   ],\n",
-       "        [284.6    , 284.6    , 284.9    , 284.19998]],\n",
-       "\n",
-       "       [[296.4    , 296.4    , 295.9    , 296.19998],\n",
-       "        [293.19998, 293.19998, 293.9    , 294.19998],\n",
-       "        [283.29   , 283.29   , 285.19998, 285.19998]],\n",
-       "\n",
-       "       ...,\n",
-       "\n",
-       "       [[293.69   , 293.69   , 293.88998, 295.38998],\n",
-       "        [288.29   , 288.29   , 289.19   , 290.79   ],\n",
-       "        [282.09   , 282.09   , 281.59   , 282.38998]],\n",
-       "\n",
-       "       [[293.79   , 293.79   , 293.69   , 295.09   ],\n",
-       "        [289.49   , 289.49   , 290.38998, 291.59   ],\n",
-       "        [282.09   , 282.09   , 281.99   , 283.09   ]]], dtype=float32)</pre></div></div></li><li class='xr-section-item'><input id='section-f9bb31fe-2d30-4413-aaec-7d8328a30980' class='xr-section-summary-in' type='checkbox'  checked><label for='section-f9bb31fe-2d30-4413-aaec-7d8328a30980' class='xr-section-summary' >Coordinates: <span>(3)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'><li class='xr-var-item'><div class='xr-var-name'><span class='xr-has-index'>lat</span></div><div class='xr-var-dims'>(lat)</div><div class='xr-var-dtype'>float32</div><div class='xr-var-preview xr-preview'>20.0 30.0 40.0</div><input id='attrs-8254ea77-a56b-4c33-949b-9bc23c0d6b66' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-8254ea77-a56b-4c33-949b-9bc23c0d6b66' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-34b79bf6-8646-488f-b792-933644ca42ab' class='xr-var-data-in' type='checkbox'><label for='data-34b79bf6-8646-488f-b792-933644ca42ab' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>standard_name :</span></dt><dd>latitude</dd><dt><span>long_name :</span></dt><dd>Latitude</dd><dt><span>units :</span></dt><dd>degrees_north</dd><dt><span>axis :</span></dt><dd>Y</dd></dl></div><div class='xr-var-data'><pre>array([20., 30., 40.], dtype=float32)</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>lon</span></div><div class='xr-var-dims'>(points)</div><div class='xr-var-dtype'>float32</div><div class='xr-var-preview xr-preview'>200.0 200.0 202.5 205.0</div><input id='attrs-4ac155dd-fe5c-46ff-a3c2-aaf4c088910a' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-4ac155dd-fe5c-46ff-a3c2-aaf4c088910a' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-006efed7-5c7d-4503-919d-3c9e24902ebf' class='xr-var-data-in' type='checkbox'><label for='data-006efed7-5c7d-4503-919d-3c9e24902ebf' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>standard_name :</span></dt><dd>longitude</dd><dt><span>long_name :</span></dt><dd>Longitude</dd><dt><span>units :</span></dt><dd>degrees_east</dd><dt><span>axis :</span></dt><dd>X</dd></dl></div><div class='xr-var-data'><pre>array([200. , 200. , 202.5, 205. ], dtype=float32)</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span class='xr-has-index'>time</span></div><div class='xr-var-dims'>(time)</div><div class='xr-var-dtype'>datetime64[ns]</div><div class='xr-var-preview xr-preview'>2013-01-01 ... 2014-12-31T18:00:00</div><input id='attrs-5fd0a354-47bd-47cd-8503-a99a2521f43c' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-5fd0a354-47bd-47cd-8503-a99a2521f43c' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-b27dc1d7-026c-4da7-ab09-d0db92e8bcb6' class='xr-var-data-in' type='checkbox'><label for='data-b27dc1d7-026c-4da7-ab09-d0db92e8bcb6' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>standard_name :</span></dt><dd>time</dd><dt><span>long_name :</span></dt><dd>Time</dd></dl></div><div class='xr-var-data'><pre>array([&#x27;2013-01-01T00:00:00.000000000&#x27;, &#x27;2013-01-01T06:00:00.000000000&#x27;,\n",
-       "       &#x27;2013-01-01T12:00:00.000000000&#x27;, ..., &#x27;2014-12-31T06:00:00.000000000&#x27;,\n",
-       "       &#x27;2014-12-31T12:00:00.000000000&#x27;, &#x27;2014-12-31T18:00:00.000000000&#x27;],\n",
-       "      dtype=&#x27;datetime64[ns]&#x27;)</pre></div></li></ul></div></li><li class='xr-section-item'><input id='section-37de95f0-3655-414f-a2b3-f9579ed5ff5b' class='xr-section-summary-in' type='checkbox'  ><label for='section-37de95f0-3655-414f-a2b3-f9579ed5ff5b' class='xr-section-summary' >Indexes: <span>(2)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'><li class='xr-var-item'><div class='xr-index-name'><div>lat</div></div><div class='xr-index-preview'>PandasIndex</div><div></div><input id='index-1fe4f3df-0a07-4e3b-b9e1-486dfa13c30a' class='xr-index-data-in' type='checkbox'/><label for='index-1fe4f3df-0a07-4e3b-b9e1-486dfa13c30a' title='Show/Hide index repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-index-data'><pre>PandasIndex(Index([20.0, 30.0, 40.0], dtype=&#x27;float32&#x27;, name=&#x27;lat&#x27;))</pre></div></li><li class='xr-var-item'><div class='xr-index-name'><div>time</div></div><div class='xr-index-preview'>PandasIndex</div><div></div><input id='index-4fd1ebdb-5560-4b72-8133-5907c46828fe' class='xr-index-data-in' type='checkbox'/><label for='index-4fd1ebdb-5560-4b72-8133-5907c46828fe' title='Show/Hide index repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-index-data'><pre>PandasIndex(DatetimeIndex([&#x27;2013-01-01 00:00:00&#x27;, &#x27;2013-01-01 06:00:00&#x27;,\n",
-       "               &#x27;2013-01-01 12:00:00&#x27;, &#x27;2013-01-01 18:00:00&#x27;,\n",
-       "               &#x27;2013-01-02 00:00:00&#x27;, &#x27;2013-01-02 06:00:00&#x27;,\n",
-       "               &#x27;2013-01-02 12:00:00&#x27;, &#x27;2013-01-02 18:00:00&#x27;,\n",
-       "               &#x27;2013-01-03 00:00:00&#x27;, &#x27;2013-01-03 06:00:00&#x27;,\n",
-       "               ...\n",
-       "               &#x27;2014-12-29 12:00:00&#x27;, &#x27;2014-12-29 18:00:00&#x27;,\n",
-       "               &#x27;2014-12-30 00:00:00&#x27;, &#x27;2014-12-30 06:00:00&#x27;,\n",
-       "               &#x27;2014-12-30 12:00:00&#x27;, &#x27;2014-12-30 18:00:00&#x27;,\n",
-       "               &#x27;2014-12-31 00:00:00&#x27;, &#x27;2014-12-31 06:00:00&#x27;,\n",
-       "               &#x27;2014-12-31 12:00:00&#x27;, &#x27;2014-12-31 18:00:00&#x27;],\n",
-       "              dtype=&#x27;datetime64[ns]&#x27;, name=&#x27;time&#x27;, length=2920, freq=None))</pre></div></li></ul></div></li><li class='xr-section-item'><input id='section-cecab476-b748-4bfb-af86-d02998249440' class='xr-section-summary-in' type='checkbox'  ><label for='section-cecab476-b748-4bfb-af86-d02998249440' class='xr-section-summary' >Attributes: <span>(11)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><dl class='xr-attrs'><dt><span>long_name :</span></dt><dd>4xDaily Air temperature at sigma level 995</dd><dt><span>units :</span></dt><dd>degK</dd><dt><span>precision :</span></dt><dd>2</dd><dt><span>GRIB_id :</span></dt><dd>11</dd><dt><span>GRIB_name :</span></dt><dd>TMP</dd><dt><span>var_desc :</span></dt><dd>Air temperature</dd><dt><span>dataset :</span></dt><dd>NMC Reanalysis</dd><dt><span>level_desc :</span></dt><dd>Surface</dd><dt><span>statistic :</span></dt><dd>Individual Obs</dd><dt><span>parent_stat :</span></dt><dd>Other</dd><dt><span>actual_range :</span></dt><dd>[185.16 322.1 ]</dd></dl></div></li></ul></div></div>"
-      ],
-      "text/plain": [
-       "<xarray.DataArray 'air' (time: 2920, lat: 3, points: 4)>\n",
-       "array([[[296.6    , 296.6    , 296.19998, 296.4    ],\n",
-       "        [293.1    , 293.1    , 293.29   , 293.29   ],\n",
-       "        [284.6    , 284.6    , 284.9    , 284.19998]],\n",
-       "\n",
-       "       [[296.4    , 296.4    , 295.9    , 296.19998],\n",
-       "        [293.19998, 293.19998, 293.9    , 294.19998],\n",
-       "        [283.29   , 283.29   , 285.19998, 285.19998]],\n",
-       "\n",
-       "       ...,\n",
-       "\n",
-       "       [[293.69   , 293.69   , 293.88998, 295.38998],\n",
-       "        [288.29   , 288.29   , 289.19   , 290.79   ],\n",
-       "        [282.09   , 282.09   , 281.59   , 282.38998]],\n",
-       "\n",
-       "       [[293.79   , 293.79   , 293.69   , 295.09   ],\n",
-       "        [289.49   , 289.49   , 290.38998, 291.59   ],\n",
-       "        [282.09   , 282.09   , 281.99   , 283.09   ]]], dtype=float32)\n",
-       "Coordinates:\n",
-       "  * lat      (lat) float32 20.0 30.0 40.0\n",
-       "    lon      (points) float32 200.0 200.0 202.5 205.0\n",
-       "  * time     (time) datetime64[ns] 2013-01-01 ... 2014-12-31T18:00:00\n",
-       "Dimensions without coordinates: points\n",
-       "Attributes: (11)"
-      ]
-     },
-     "execution_count": 43,
-     "metadata": {},
-     "output_type": "execute_result"
-    }
-   ],
+   "outputs": [],
    "source": [
     "da_air.sel(lat=[20, 30, 40], lon=lon_points, method=\"nearest\")"
    ]
@@ -4083,11 +324,6 @@
   }
  ],
  "metadata": {
-  "kernelspec": {
-   "display_name": "Python 3 (ipykernel)",
-   "language": "python",
-   "name": "python3"
-  },
   "language_info": {
    "codemirror_mode": {
     "name": "ipython",
@@ -4097,8 +333,7 @@
    "mimetype": "text/x-python",
    "name": "python",
    "nbconvert_exporter": "python",
-   "pygments_lexer": "ipython3",
-   "version": "3.11.4"
+   "pygments_lexer": "ipython3"
   },
   "toc": {
    "base_numbering": 1,