Process GRIB data per month for better performance

postprocess.sh

@@ -15,6 +15,8 @@ if [[ ! -f $weights_file ]]; then
     "${weights_file}"
 fi
 
+year=$1
+
 cdo \
   -f nc4 \
   -P 8 \
@@ -22,5 +24,5 @@ cdo \
   -hpdegrade,nside=128 \
   -monmean \
   -mergetime \
-  data/icon_historical_*.grib2 \
-  data/icon_historical_1992.nc
+  data/icon_historical_${year}*.grib2 \
+  data/icon_historical_monmean_1x1_${year}.nc