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New parameters
Mass density of air
At the moment almost all of the chemical and aerosol species we disseminate and archive are expressed as mass mixing ratios. While this might be sufficient for most of the users, some would prefer to use mass concentration data.
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#!/bin/sh
set -ex
module load eccodes
module load cdo
DATADIR=/path-to-datadir
LEVEL=60 # select model level
PARAM=no2 # select parameter
# extract single level field
grib_copy -w level=${LEVEL} ${DATADIR}/z_cams_c_ecmf_20180425000000_prod_fc_pl_012_${PARAM}.grib ${PARAM}_mmr_${LEVEL}.grib
grib_copy -w level=${LEVEL} ${DATADIR}/z_cams_c_ecmf_20180425000000_prod_fc_pl_012_den.grib den_${LEVEL}.grib
# compute concentration = mmr * air_density
cdo mul ${PARAM}_mmr_${LEVEL}.grib den_${LEVEL}.grib ${PARAM}_conc_${LEVEL}.grib |
Lowest model level
A new near-surface data service
A Another frequent request we receive is from users who are interested in surface Due to the nature of data organisation
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New aerosol parameters
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