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Fix #57: Check if ERA5 nc file for this year exists, else, use latest date from prev year #58

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Jan 6, 2025
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Fix #57: Check if ERA5 nc file for this year exists, else, use latest date from prev year #58

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12 changes: 11 additions & 1 deletion run_era5_forecast.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -19,7 +19,17 @@ for HEMI in south north; do

# ERA5 tracks behind the SIC, there was an issue causing the need to use SIC
# FORECAST_INIT=`python -c 'import xarray as xr; print(str(xr.open_dataset("data/osisaf/'$HEMI'/siconca/'${DATE_RANGE:0:4}'.nc").time.values.max())[0:10])'`
FORECAST_INIT=`python -c 'import xarray as xr; print(str(xr.open_dataset("data/era5/'$HEMI'/tas/'${DATE_RANGE:0:4}'.nc").time.values.max())[0:10])'`

# If ERA5 `tas` variable netCDF file does not exist for this year, likely because we've just hit first week of new year where there is no ERA5 data
# available yet due to ~5 day lag in data availability.
if [ ! -f "data/era5/'$HEMI'/tas/'${DATE_RANGE:0:4}'.nc" ]; then
# Use latest day data has been downloaded for in the previous year
YEAR=`date +%Y --date='last year'`
FORECAST_INIT=`python -c 'import xarray as xr; print(str(xr.open_dataset("data/era5/'$HEMI'/tas/'${YEAR}'.nc").time.values.max())[0:10])'`
else
YEAR=${DATE_RANGE:0:4}
FORECAST_INIT=`python -c 'import xarray as xr; print(str(xr.open_dataset("data/era5/'$HEMI'/tas/'${YEAR}'.nc").time.values.max())[0:10])'`
fi

export FORECAST_START="$FORECAST_INIT"
export FORECAST_END="$FORECAST_INIT"
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