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#!/bin/bash
# http://opendata.dwd.de/weather/nwp/icon-d2/grib/00/t/icon-d2_germany_regular-lat-lon_pressure-level_2023080200_000_1000_t.grib2.bz2
# <BASE>/<RUN>/<PARAMETER>/icon-d2_regular-lat-lon_pressure-level_<INIT>_<OFFSET>_<LEVEL>_<PARAMETER>
NPROC=$(nproc)
OUTDIR=dwd_icon-d2
MODEL=icon-d2
MODEL_LONG=icon-d2_germany
BASE="http://opendata.dwd.de/weather/nwp"
RUN="18"
PARAMETERS=( "t" "relhum" "u" "v" "fi" )
# tot_prec and cape_ml/cin_ml is in 15min intervals and screws with xygrib
PARAMETERS_SINGLE_LEVEL=( "w_ctmax" )
PRESSURE_LEVELS=( "1000" "975" "950" "850" "700" "600" "500" "400" "300" "250" "200" )
OFFSETS=( "000" "003" "006" "009" "012" "015" "018" "024" "027" "030" "033" "036" "039" "042" "045" "048" )
DATE=$(date +%Y%m%d)
DATE=20230901
mkdir -p $OUTDIR
echo -n > "$OUTDIR/index.txt"
for OFFSET in "${OFFSETS[@]}"; do
for PARAMETER in "${PARAMETERS[@]}"; do
for LEVEL in "${PRESSURE_LEVELS[@]}"; do
while [ $(pgrep -c -P$$) -gt $NPROC ]; do
sleep 1
done
URL="$BASE/$MODEL/grib/$RUN/$PARAMETER/${MODEL_LONG}_regular-lat-lon_pressure-level_${DATE}${RUN}_${OFFSET}_${LEVEL}_${PARAMETER}.grib2.bz2"
BNAME=$(basename "$URL")
echo Getting "$URL"
echo "${BNAME%.bz2}" >> $OUTDIR/index.txt
( wget -q --directory-prefix=$OUTDIR "$URL" || echo FAILED! ) &
done
done
for PARAMETER in "${PARAMETERS_SINGLE_LEVEL[@]}"; do
while [ $(pgrep -c -P$$) -gt $NPROC ]; do
sleep 1
done
URL="$BASE/$MODEL/grib/$RUN/$PARAMETER/${MODEL_LONG}_regular-lat-lon_single-level_${DATE}${RUN}_${OFFSET}_2d_${PARAMETER}.grib2.bz2"
BNAME=$(basename "$URL")
echo Getting "$URL"
echo "${BNAME%.bz2}" >> $OUTDIR/index.txt
( wget -q --directory-prefix=$OUTDIR "$URL" || echo FAILED! ) &
done
done
while [ $(pgrep -c -P$$) -gt 0 ]; do
sleep 1
done
echo Done downloading. Decompressing...
for F in $OUTDIR/*.grib2.bz2; do
while [ $(pgrep -c -P$$) -gt $NPROC ]; do
sleep 1
done
bzip2 -df "$F" &
done
rm -f $OUTDIR/combined.grib2
grib_copy $OUTDIR/*.grib2 $OUTDIR/combined.grib2 || exit 1
rm -f $OUTDIR/icon*.grib2
echo Done.
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