On the intermittency of orographic gravity wave hotspots and its importance for middle atmosphere dynamics

A. Kuchar, P. Sacha, R. Eichinger, Ch. Jacobi, P. Pisoft, and H. Rieder

Published in Weather and Climate Dynamics.

Code used to process and visualise the model and other data outputs in order to reproduce figures in the manuscript. Model data are available here. All datasets already preprocessed can be found here.

Notebooks for each individual figure as well as for two data tables are in the code/ directory, while the figures themselves are in the plots/ directory.

Figures

#	Figure	Notebook	Dependencies
1	Ratio of zonally averaged OGWD in zonal direction to the total wave forcing	reproduce_Fig1+2.ipynb
2	Winter climatology of the zonal OGWD component at 70 hPa	reproduce_Fig1+2.ipynb
3	Area-weighted average of daily OGWD within the hotspot areas	reproduce_Fig3+table.ipynb	averaging.py, detect_peaks.py
4	Climatologies for the absolute gravity wave momentum fluxes at 20 and 30 km	reproduce_Fig4.ipynb
5	Climatology of total parametrized zonally averaged GWD at 70 hPa in January averaged over the period 1980-2010	reproduce_Fig5+S3.ipynb
6	OGWD distribution at 70 hPa during boreal winter within HI, EA and WA hotspot, respectively, with log-norm fit	reproduce_Fig6+S15.ipynb	averaging.py
7	Spatial and annual variability of the Gini index of GW momentum fluxes at 100, 70, 50, 20, 10, 1 hPa within HI, EA and WA hotspot, respectively	reproduce_Fig7+Smaps+S12-S14.ipynb
8	Composite anomalies of OGWD averaged at all lags within the selected hotspot areas on the 20-day timescale	reproduce_Fig8.ipynb	anomalies_calc-accelogw.ipynb

Supplementary figures

#	Figure	Notebook	Dependencies
S1	Comparison between zonal and meridional OGWD didstributions at 70 hPa during boreal winter within HI, EA and WA hotspot, respectively	reproduce_FigS1.ipynb
S2	Climatological relative EPFD contribution to the overall drag in January averaged over the period 1980-2010	reproduce_FigS2.ipynb
S3	Climatological average of particular CMAM-sd tendencies in January averaged over the period 1980-2010	reproduce_Fig5+S3.ipynb
S4	Spatial variability of Gini index of OGW momentum fluxes at 100,70,50,20,10,1 hPa for DJF	reproduce_Fig7+Smaps+S12-S14.ipynb
S5	Spatial variability of Gini index of NGW momentum fluxes at 100,70,50,20,10,1 hPa for DJF	reproduce_Fig7+Smaps+S12-S14.ipynb
S6	Spatial variability of Gini index of OGW momentum fluxes at 100,70,50,20,10,1 hPa for MAM	reproduce_Fig7+Smaps+S12-S14.ipynb
S7	Spatial variability of Gini index of NGW momentum fluxes at 100,70,50,20,10,1 hPa for MAM	reproduce_Fig7+Smaps+S12-S14.ipynb
S8	Spatial variability of Gini index of OGW momentum fluxes at 100,70,50,20,10,1 hPa for JJA	reproduce_Fig7+Smaps+S12-S14.ipynb
S9	Spatial variability of Gini index of NGW momentum fluxes at 100,70,50,20,10,1 hPa for JJA	reproduce_Fig7+Smaps+S12-S14.ipynb
S10	Spatial variability of Gini index of OGW momentum fluxes at 100,70,50,20,10,1 hPa for SON	reproduce_Fig7+Smaps+S12-S14.ipynb
S11	Spatial variability of Gini index of NGW momentum fluxes at 100,70,50,20,10,1 hPa for SON	reproduce_Fig7+Smaps+S12-S14.ipynb
S12	Spatial and annual variability of the Gini index of OGW momentum fluxes at 100, 70, 50, 20, 10, 1 hPa within HI, EA and WA hotspot, respectively	reproduce_Fig7+Smaps+S12-S14.ipynb
S13	Spatial and annual variability of the Gini index of NOGW momentum fluxes at 100, 70, 50, 20, 10, 1 hPa within HI, EA and WA hotspot, respectively	reproduce_Fig7+Smaps+S12-S14.ipynb
S14	Spatial and annual variability of Gini index of OGW momentum fluxes at 850 hPa within Himalayas, East Asia and West America hotspot, respectively.	reproduce_Fig7+Smaps+S12-S14.ipynb
S15	OGWD distribution at 70 hPa during boreal winter within HI, EA and WA hotspot, respectively with Weibull fit	reproduce_Fig6+S15.ipynb

Tables

#	Figure	Notebook	Dependencies
1	Number of detected peak events per month for the three selected hotspot areas	reproduce_Fig3+table.ipynb

Required package installation

pip install -r requirements.txt

References

Kuchar, A., Sacha, P., Eichinger, R., Jacobi, C., Pisoft, P., and Rieder, H. E.: On the intermittency of orographic gravity wave hotspots and its importance for middle atmosphere dynamics, Weather Clim. Dynam., 1, 481-495, https://doi.org/10.5194/wcd-2020-21, 2020.