[EMEP] Computed variables about pyaerocom HOT 1 OPEN

file1=${model}/renamed/aerocom.${model}.daily.sconcno3.${year}.nc
file2=${model}/renamed/aerocom.${model}.daily.sconchno3.${year}.nc
file3=${model}/renamed/aerocom.${model}.daily.sconctno3.${year}.nc
if [ ! -f $file3 ] ; then
if [ -f $file1 ] ; then
     if [ -f $file2 ] ; then
        ncks -O -v sconcno3 $file1 $file3
        ncrename -v sconcno3,sconctno3 $file3
        ncks -A -v sconchno3 $file2 $file3
        ncap2 -O -s "sconctno3=sconctno3+sconchno3" $file3 $file3
        ncks -O -x -v sconchno3  $file3 $file3
         fi
fi
fi