New parameters in FTP dissemination
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 (kg kg-1). While this might be sufficient enough for most of the users, some would prefer to use convert the data to mass concentration values (kg m-3).
The conversion formula is simple and we . We are now providing air density density of dry air ("den") as a new parameter to in the CAMS main global dissemination streams stream (CAMS_NREALTIME/ CAMS_GLOBAL). The new parameter is available on pressure and model levels in both GRIB and NetCDF format from the FTP server (ftp://dissemination.ecmwf. The new files are int).
The air density fields are not archived in the MARS data archive and are not available through Web API service.
The new files are named as follows:
| Code Block |
|---|
z_cams_c_ecmf_20180425000000_prod_an_ml_000_den.grib z_cams_c_ecmf_20180425000000_prod_an_ml_000_den.nc z_cams_c_ecmf_20180425000000_prod_an_pl_000_den.grib z_cams_c_ecmf_20180425000000_prod_an_pl_000_den.nc ... z_cams_c_ecmf_20180425000000_prod_fc_ml_012_den.grib z_cams_c_ecmf_20180425000000_prod_fc_ml_012_den.nc z_cams_c_ecmf_20180425000000_prod_fc_pl_012_den.grib z_cams_c_ecmf_20180425000000_prod_fc_pl_012_den.nc ... |
Computation scripts
To compute mass concentration you can use the scripts below.
Compute mass concentration of a chemical species on pressure level from NetCDF output
| Code Block | ||||||||
|---|---|---|---|---|---|---|---|---|
| ||||||||
#!/bin/sh
set -ex
module load cdo
DATADIR=/path-to-datadir
LEVEL=1000 # select pressure level
PARAM=co # select parameter
# extract single level field
cdo -sellevel,${LEVEL} ${DATADIR}/z_cams_c_ecmf_20180425000000_prod_fc_pl_012_${PARAM}.nc ${PARAM}_mmr_${LEVEL}.nc
cdo -sellevel,${LEVEL} ${DATADIR}/z_cams_c_ecmf_20180425000000_prod_fc_pl_012_den.nc den_${LEVEL}.nc
# unpack NetCDF data
cdo -b f32 copy ${PARAM}_mmr_${LEVEL}.nc ${PARAM}_mmr_${LEVEL}_32.nc
cdo -b f32 copy den_${LEVEL}.nc den_${LEVEL}_32.nc
# compute concentration = mmr * air_density
cdo mul ${PARAM}_mmr_${LEVEL}_32.nc den_${LEVEL}_32.nc ${PARAM}_conc_${LEVEL}.nc |
Compute mass concentration of a chemical species on model level from GRIB file
| Code Block | ||||||||
|---|---|---|---|---|---|---|---|---|
| ||||||||
#!/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 |
A new near-surface data service
TODO: Describe lowest model level service, location, file content, grant permissions to users
| Code Block |
|---|
CAMS_GLOBAL_ADDITIONAL/2018042500/z_cams_c_ecmf_20180425000000_prod_an_ml60_000_aermr01.grib
CAMS_GLOBAL_ADDITIONAL/2018042500/z_cams_c_ecmf_20180425000000_prod_an_ml60_000_aermr01.nc
...
CAMS_GLOBAL_ADDITIONAL/2018042500/z_cams_c_ecmf_20180425000000_prod_fc_ml60_012_aermr01.grib
CAMS_GLOBAL_ADDITIONAL/2018042500/z_cams_c_ecmf_20180425000000_prod_fc_ml60_012_aermr01.nc
... |
New aerosol parameters
AEROSOL OPTICAL DEPTH AT ADDITIONAL WAVELENGTHS
+ 210217, aod340, Total aerosol optical depth at 340 nm,+ 210218, aod355, Total aerosol optical depth at 355 nm,
+ 210219, aod380, Total aerosol optical depth at 380 nm,
+ 210220, aod400, Total aerosol optical depth at 400 nm,
+ 210221, aod440, Total aerosol optical depth at 440 nm,
+ 210222, aod500, Total aerosol optical depth at 500 nm,
+ 210223, aod532, Total aerosol optical depth at 532 nm,
+ 210224, aod645, Total aerosol optical depth at 645 nm,
+ 210225, aod800, Total aerosol optical depth at 800 nm,
+ 210226, aod858, Total aerosol optical depth at 858 nm,
+ 210227, aod1020, Total aerosol optical depth at 1020 nm,
+ 210228, aod1064, Total aerosol optical depth at 1064 nm,
+ 210229, aod1640, Total aerosol optical depth at 1640 nm,
+ 210230, aod2130, Total aerosol optical depth at 2130 nm,
ABSORPTION OPTICAL DEPTH
+ 215096, aodabs340, Total absorption aerosol optical depth at 340 nm,
+ 215097, aodabs355, Total absorption aerosol optical depth at 355 nm,
+ 215098, aodabs380, Total absorption aerosol optical depth at 380 nm,
+ 215099, aodabs400, Total absorption aerosol optical depth at 400 nm,
+ 215100, aodabs440, Total absorption aerosol optical depth at 440 nm,
+ 215101, aodabs469, Total absorption aerosol optical depth at 469 nm,
+ 215102, aodabs500, Total absorption aerosol optical depth at 500 nm,
+ 215103, aodabs532, Total absorption aerosol optical depth at 532 nm,
+ 215104, aodabs550, Total absorption aerosol optical depth at 550 nm,
+ 215105, aodabs645, Total absorption aerosol optical depth at 645 nm,
+ 215106, aodabs670, Total absorption aerosol optical depth at 670 nm,
+ 215107, aodabs800, Total absorption aerosol optical depth at 800 nm,
+ 215108, aodabs858, Total absorption aerosol optical depth at 858 nm,
+ 215109, aodabs865, Total absorption aerosol optical depth at 865 nm,
+ 215110, aodabs1020, Total absorption aerosol optical depth at 1020 nm,
+ 215111, aodabs1064, Total absorption aerosol optical depth at 1064 nm,
+ 215112, aodabs1240, Total absorption aerosol optical depth at 1240 nm,
+ 215113, aodabs1640, Total absorption aerosol optical depth at 1640 nm,
+ 215176, aodabs2130, Total absorption aerosol optical depth at 2130 nm,
FINE-MODE OPTICAL DEPTH
+ 215114, aodfm340, Total fine mode (r < 0.5 um) aerosol optical depth at 340 nm,
+ 215115, aodfm355, Total fine mode (r < 0.5 um) aerosol optical depth at 355 nm,
+ 215116, aodfm380, Total fine mode (r < 0.5 um) aerosol optical depth at 380 nm,
+ 215117, aodfm400, Total fine mode (r < 0.5 um) aerosol optical depth at 400 nm,
+ 215118, aodfm440, Total fine mode (r < 0.5 um) aerosol optical depth at 440 nm,
+ 215119, aodfm469, Total fine mode (r < 0.5 um) aerosol optical depth at 469 nm,
+ 215120, aodfm500, Total fine mode (r < 0.5 um) aerosol optical depth at 500 nm,
+ 215121, aodfm532, Total fine mode (r < 0.5 um) aerosol optical depth at 532 nm,
+ 215122, aodfm550, Total fine mode (r < 0.5 um) aerosol optical depth at 550 nm,
+ 215123, aodfm645, Total fine mode (r < 0.5 um) aerosol optical depth at 645 nm,
+ 215124, aodfm670, Total fine mode (r < 0.5 um) aerosol optical depth at 670 nm,
+ 215125, aodfm800, Total fine mode (r < 0.5 um) aerosol optical depth at 800 nm,
+ 215126, aodfm858, Total fine mode (r < 0.5 um) aerosol optical depth at 858 nm,
+ 215127, aodfm865, Total fine mode (r < 0.5 um) aerosol optical depth at 865 nm,
+ 215128, aodfm1020, Total fine mode (r < 0.5 um) aerosol optical depth at 1020 nm,
+ 215129, aodfm1064, Total fine mode (r < 0.5 um) aerosol optical depth at 1064 nm,
+ 215130, aodfm1240, Total fine mode (r < 0.5 um) aerosol optical depth at 1240 nm,
+ 215131, aodfm1640, Total fine mode (r < 0.5 um) aerosol optical depth at 1640 nm,
+ 215177, aodfm2130, Total fine mode (r < 0.5 um) aerosol optical depth at 2130 nm,
COLUMN-MEAN SINGLE SCATTERING ALBEDO
+ 215132, ssa340, Single scattering albedo at 340 nm,
+ 215133, ssa355, Single scattering albedo at 355 nm,
+ 215134, ssa380, Single scattering albedo at 380 nm,
+ 215135, ssa400, Single scattering albedo at 400 nm,
+ 215136, ssa440, Single scattering albedo at 440 nm,
+ 215137, ssa469, Single scattering albedo at 469 nm,
+ 215138, ssa500, Single scattering albedo at 500 nm,
+ 215139, ssa532, Single scattering albedo at 532 nm,
+ 215140, ssa550, Single scattering albedo at 550 nm,
+ 215141, ssa645, Single scattering albedo at 645 nm,
+ 215142, ssa670, Single scattering albedo at 670 nm,
+ 215143, ssa800, Single scattering albedo at 800 nm,
+ 215144, ssa858, Single scattering albedo at 858 nm,
+ 215145, ssa865, Single scattering albedo at 865 nm,
+ 215146, ssa1020, Single scattering albedo at 1020 nm,
+ 215147, ssa1064, Single scattering albedo at 1064 nm,
+ 215148, ssa1240, Single scattering albedo at 1240 nm,
+ 215149, ssa1640, Single scattering albedo at 1640 nm,
+ 215178, ssa2130, Single scattering albedo at 2130 nm,
COLUMN-MEAN ASYMMETRY PARAMETER
+ 215150, assimetry340, Assimetry factor at 340 nm,
+ 215151, assimetry355, Assimetry factor at 355 nm,
+ 215152, assimetry380, Assimetry factor at 380 nm,
+ 215153, assimetry400, Assimetry factor at 400 nm,
+ 215154, assimetry440, Assimetry factor at 440 nm,
+ 215155, assimetry469, Assimetry factor at 469 nm,
+ 215156, assimetry500, Assimetry factor at 500 nm,
+ 215157, assimetry532, Assimetry factor at 532 nm,
+ 215158, assimetry550, Assimetry factor at 550 nm,
+ 215159, assimetry645, Assimetry factor at 645 nm,
+ 215160, assimetry670, Assimetry factor at 670 nm,
+ 215161, assimetry800, Assimetry factor at 800 nm,
+ 215162, assimetry858, Assimetry factor at 858 nm,
+ 215163, assimetry865, Assimetry factor at 865 nm,
+ 215164, assimetry1020, Assimetry factor at 1020 nm,
+ 215165, assimetry1064, Assimetry factor at 1064 nm,
+ 215166, assimetry1240, Assimetry factor at 1240 nm,
+ 215167, assimetry1640, Assimetry factor at 1640 nm,
+ 215179, assimetry2130, Assimetry factor at 2130 nm,
PER-BIN AEROSOL OPTICAL DEPTH AT 550nm
+ 215022, aerodsss, Sea salt aerosol (0.03 - 0.5 um) optical depth,
+ 215023, aerodssm, Sea salt aerosol (0.5 - 5 um) optical depth,
+ 215024, aerodssl, Sea salt aerosol (5 - 20 um) optical depth,
+ 215046, aeroddus, Dust aerosol (0.03 - 0.55 um) optical depth,
+ 215047, aeroddum, Dust aerosol (0.55 - 9 um) optical depth,
+ 215048, aeroddul, Dust aerosol (9 - 20 um) optical depth,
+ 215063, aerodomhphob, Hydrophobic organic matter aerosol optical depth,
+ 215064, aerodomhphil, Hydrophilic organic matter aerosol optical depth,
+ 215079, aerodbchphob, Hydrophobic black carbon aerosol optical depth,
+ 215080, aerodbchphil, Hydrophilic black carbon aerosol optical depth,
+ 215088, aerodsu, Sulphate aerosol optical depth,
AEROSOL MASS BUDGET TERMS
+ 215001, aersrcsss, Source/gain of sea salt aerosol (0.03 - 0.5 um),
+ 215002, aersrcssm, Source/gain of sea salt aerosol (0.5 - 5 um),
+ 215003, aersrcssl, Source/gain of sea salt aerosol (5 - 20 um),
+ 215004, aerddpsss, Dry deposition of sea salt aerosol (0.03 - 0.5 um),
+ 215005, aerddpssm, Dry deposition of sea salt aerosol (0.5 - 5 um),
+ 215006, aerddpssl, Dry deposition of sea salt aerosol (5 - 20 um),
+ 215007, aersdmsss, Sedimentation of sea salt aerosol (0.03 - 0.5 um),
+ 215008, aersdmssm, Sedimentation of sea salt aerosol (0.5 - 5 um),
+ 215009, aersdmssl, Sedimentation of sea salt aerosol (5 - 20 um),
+ 215010, aerwdlssss, Wet deposition of sea salt aerosol (0.03 - 0.5 um) by large-scale precipitation,
+ 215011, aerwdlsssm, Wet deposition of sea salt aerosol (0.5 - 5 um) by large-scale precipitation,
+ 215012, aerwdlsssl, Wet deposition of sea salt aerosol (5 - 20 um) by large-scale precipitation,
+ 215013, aerwdccsss, Wet deposition of sea salt aerosol (0.03 - 0.5 um) by convective precipitation,
+ 215014, aerwdccssm, Wet deposition of sea salt aerosol (0.5 - 5 um) by convective precipitation,
+ 215015, aerwdccssl, Wet deposition of sea salt aerosol (5 - 20 um) by convective precipitation,
+ 215016, aerngtsss, Negative fixer of sea salt aerosol (0.03 - 0.5 um),
+ 215017, aerngtssm, Negative fixer of sea salt aerosol (0.5 - 5 um),
+ 215018, aerngtssl, Negative fixer of sea salt aerosol (5 - 20 um),
+ 215025, aersrcdus, Source/gain of dust aerosol (0.03 - 0.55 um),
+ 215026, aersrcdum, Source/gain of dust aerosol (0.55 - 9 um),
+ 215027, aersrcdul, Source/gain of dust aerosol (9 - 20 um),
+ 215028, aerddpdus, Dry deposition of dust aerosol (0.03 - 0.55 um),
+ 215029, aerddpdum, Dry deposition of dust aerosol (0.55 - 9 um),
+ 215030, aerddpdul, Dry deposition of dust aerosol (9 - 20 um),
+ 215031, aersdmdus, Sedimentation of dust aerosol (0.03 - 0.55 um),
+ 215032, aersdmdum, Sedimentation of dust aerosol (0.55 - 9 um),
+ 215033, aersdmdul, Sedimentation of dust aerosol (9 - 20 um),
+ 215034, aerwdlsdus, Wet deposition of dust aerosol (0.03 - 0.55 um) by large-scale precipitation,
+ 215035, aerwdlsdum, Wet deposition of dust aerosol (0.55 - 9 um) by large-scale precipitation,
+ 215036, aerwdlsdul, Wet deposition of dust aerosol (9 - 20 um) by large-scale precipitation,
+ 215037, aerwdccdus, Wet deposition of dust aerosol (0.03 - 0.55 um) by convective precipitation,
+ 215038, aerwdccdum, Wet deposition of dust aerosol (0.55 - 9 um) by convective precipitation,
+ 215039, aerwdccdul, Wet deposition of dust aerosol (9 - 20 um) by convective precipitation,
+ 215040, aerngtdus, Negative fixer of dust aerosol (0.03 - 0.55 um),
+ 215041, aerngtdum, Negative fixer of dust aerosol (0.55 - 9 um),
+ 215042, aerngtdul, Negative fixer of dust aerosol (9 - 20 um),
+ 215049, aersrcomhphob, Source/gain of hydrophobic organic matter aerosol,
+ 215050, aersrcomhphil, Source/gain of hydrophilic organic matter aerosol,
+ 215051, aerddpomhphob, Dry deposition of hydrophobic organic matter aerosol,
+ 215052, aerddpomhphil, Dry deposition of hydrophilic organic matter aerosol,
+ 215053, aersdmomhphob, Sedimentation of hydrophobic organic matter aerosol,
+ 215054, aersdmomhphil, Sedimentation of hydrophilic organic matter aerosol,
+ 215055, aerwdlsomhphob, Wet deposition of hydrophobic organic matter aerosol by large-scale precipitation,
+ 215056, aerwdlsomhphil, Wet deposition of hydrophilic organic matter aerosol by large-scale precipitation,
+ 215057, aerwdccomhphob, Wet deposition of hydrophobic organic matter aerosol by convective precipitation,
+ 215058, aerwdccomhphil, Wet deposition of hydrophilic organic matter aerosol by convective precipitation,
+ 215059, aerngtomhphob, Negative fixer of hydrophobic organic matter aerosol,
+ 215060, aerngtomhphil, Negative fixer of hydrophilic organic matter aerosol,
+ 215065, aersrcbchphob, Source/gain of hydrophobic black carbon aerosol,
+ 215066, aersrcbchphil, Source/gain of hydrophilic black carbon aerosol,
+ 215067, aerddpbchphob, Dry deposition of hydrophobic black carbon aerosol,
+ 215068, aerddpbchphil, Dry deposition of hydrophilic black carbon aerosol,
+ 215069, aersdmbchphob, Sedimentation of hydrophobic black carbon aerosol,
+ 215070, aersdmbchphil, Sedimentation of hydrophilic black carbon aerosol,
+ 215071, aerwdlsbchphob, Wet deposition of hydrophobic black carbon aerosol by large-scale precipitation,
+ 215072, aerwdlsbchphil, Wet deposition of hydrophilic black carbon aerosol by large-scale precipitation,
+ 215073, aerwdccbchphob, Wet deposition of hydrophobic black carbon aerosol by convective precipitation,
+ 215074, aerwdccbchphil, Wet deposition of hydrophilic black carbon aerosol by convective precipitation,
+ 215075, aerngtbchphob, Negative fixer of hydrophobic black carbon aerosol,
+ 215076, aerngtbchphil, Negative fixer of hydrophilic black carbon aerosol,
+ 215081, aersrcsu, Source/gain of sulphate aerosol,
+ 215082, aerddpsu, Dry deposition of sulphate aerosol,
+ 215083, aersdmsu, Sedimentation of sulphate aerosol,
+ 215084, aerwdlssu, Wet deposition of sulphate aerosol by large-scale precipitation,
+ 215085, aerwdccsu, Wet deposition of sulphate aerosol by convective precipitation,
+ 215086, aerngtsu, Negative fixer of sulphate aerosol,
+ 215168, aersrcso2, Source/gain of sulphur dioxide,
+ 215169, aerddpso2, Dry deposition of sulphur dioxide,
+ 215170, aersdmso2, Sedimentation of sulphur dioxide,
+ 215171, aerwdlsso2, Wet deposition of sulphur dioxide by large-scale precipitation,
+ 215172, aerwdccso2, Wet deposition of sulphur dioxide by convective precipitation,
+ 215173, aerngtso2, Negative fixer of sulphur dioxide,
MODEL-LEVEL FIELDS INTRODUCED IN 43R3 BUT NOT CURRENTLY EXPOSED VIA WEB UI
(from 45r1,
New aerosol parameters in data archive
Several new aerosol diagnostic parameters are available from our MARS data archive using the Web API service. Please read the service description if you haven't used it before.
To access test data please use dataset=cams_esuite keyword. After the upgrade data will be available using keyword dataset=cams_nrealtime.
They are not distributed via the FTP server.
| parameter group | list of parameters | |||||||
|---|---|---|---|---|---|---|---|---|
Aerosol optical depth at additional wavelengths |
| |||||||
Absorption optical depth |
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Fine-mode optical depth |
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Column-mean single scattering albedo |
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Column-mean asymmetry parameter |
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Per-bin aerosol optical depth at 550 nm |
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Aerosol mass budget terms |
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Model-level fields (aerext* and aerbackscat* are also available on pressure levels; aot* are not) |
+ 215094, naot532, Natural
|
+ 215095,
|
+ 215180,
|
+ 215181,
|
+ 215182,
|
+ 215183,
|
+ 215184,
|
+ 215185,
|
+ 215186,
|
+ 215187,
|
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A new near-surface service
To reduce the volume of data one would have to download to access near-surface values we are introducing a new data service. We are making the lowest model level analyses and forecasts of atmospheric composition parameters available as separate files. The fields are based on same CAMS global modelling system.
In the new file names level type information is encoded as ml60, the files can be found in the directory called CAMS_GLOBAL_ADDITIONAL:
| Code Block |
|---|
/DATA/CAMS_GLOBAL_ADDITIONAL/2018042500/z_cams_c_ecmf_20180425000000_prod_an_ml60_000_aermr01.grib
/DATA/CAMS_GLOBAL_ADDITIONAL/2018042500/z_cams_c_ecmf_20180425000000_prod_an_ml60_000_aermr01.nc
...
|