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Scope
The ECMWF FTP service provides access to real-time data from the CAMS global atmospheric composition system. For product documentation please see here. For a description of the current global model please see here (including information on system upgrades) . For other data access options please see here.
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From 18th October at 15:00UTC, our FTP server has changed from ftp://dissemination.ecmwf.int to ftp://aux.ecmwf.int From 18th October 15:00UTC, no new data will be published on dissemination.ecmwf.int |
Scope
The ECMWF FTP service provides access to real-time data from the CAMS global atmospheric composition system. For product documentation please see here. For a description of the current global model please see here (including information on system upgrades) . For other data access options please see here.
Please see the list of available atmospheric Please see the list of available atmospheric composition variables below and make sure your variables of interest are available. Please contact us if Should you require any additional species., please raise a request through the ECMWF Support Portal (ECMWF login required).
User User accounts
To get access to CAMS global data, you need user accounts on the ECMWF website, and on the ECMWF FTP service.
- Log on to www.ecmwf.int. (If you do not have an account create one)
- Read the CAMS data licence and the Licence to Use Copernicus Productsand accept the license at the bottom of the page.
- Send an email to copernicus-support@ecmwf.intContact us by creating a ticket through the ECMWF Support Portal, providing
- the user name you used to log into www.ecmwf.int and accept the license
- for our service planning, a brief description of how you intend to use the data, and which chemical species are most relevant for you
Data location
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Please note that the default limit per user is 10 active connections to the FTP server. There is also an overall limit across all users of 2,000 active connections. |
Data location
FTP server | ftp://aux | FTP server | ftp://dissemination.ecmwf.int |
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Data | directorydirectories | /DATA/CAMS_GLOBAL/${YYYYMMDDhh} | |
/DATA/CAMS_GLOBAL_ADDITIONAL which contains individual files of surface level fields (model level 137). | |||
/DATA/CAMS_GLOBAL_TEST/ which contains test data files | |||
Retention policy | Forecast are kept for 3 | Retention policy | Forecast are kept for 3 days |
File naming convention
The file naming convention is based on WMO guidelines as follows:
z_cams_c_ecmf_yyyymmddhhmmss_vvvv_tt_lt_sss_param.[grib|nc]
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ecmf | is the WMO location indicators. The list can be found here. |
yyyymmddhhmmss | is the base date and time of the forecast. |
vvvv | is a version or experiment identifier. prod will be used for operational products, test (or experiment ID) will be used for testing purposes, rean for reanalysis if needed. |
tt | type of data, fc - forecast, an - analysis |
lt | is the type of level. pl for pressure level products, sfc for surface fields, ml for model level fields |
sss | is the forecast hour time step. For accumulation and averages, it is the end time. This number must be zero padded to 3 digits, e.g. step 24 is given as 024 |
param | is the parameter short name as defined here |
| is the format of a file, GRIB or NETCDF |
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z_cams_c_ ecmf_20160704000000_prod_fc_pl_012_co.grib
contains all the pressure levels of +12 step CO fields from a forecast started on 7 July 2016 at 00:00 UTC.
z_cams_c_ ecmf ecmf_20160704120000_prod_fc_ml_012_go3.nc nc
contains all the model levels of step 12 O3 fields from a forecast which was started on 7 July 2016 at 12:00 UTC in NetCDF format.
Data
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The latest model cycle based on the 00 UTC analysis is normally available by 10:00 UTC, the cycle based on 12 UTC analysis is available by 22:00 UTC.
After the data transfer to the ftp server is completed a manifest file is uploaded:
z_cams_c_ecmf_yyyymmddhhmmss_vvvv.manifest
The file is uploaded to the server only after all the data files have been successfully uploaded. The file contains a list of all the GRIB and NetCDF files in the cycle and their MD5 checksums in case you would like to verify data integrity.
List of available parameters
format
Model level fields are in GRIB2 format. All other fields are in GRIB1, except for new parameters from cycle 48r1 (more details are available here). NetCDF format is also available.
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From cycle 48R1, there are important changes to the GRIB encoding for model levels fields, relating to packing and GRIB tables. Please see this page for full details: Implementation of IFS cycle 48r1 for CAMS#ChangetoGRIBencoding The 'packingType' can be changed using ECMWF's ecCodes:
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Data availability
The latest model cycle based on the 00 UTC analysis is normally available by 10:00 UTC, the cycle based on 12 UTC analysis is available by 22:00 UTC.
After the data transfer to the ftp server is completed a manifest file is uploaded:
z_cams_c_ecmf_yyyymmddhhmmss_vvvv.manifest
The file is uploaded to the server only after all the data files have been successfully uploaded. The file contains a list of all the GRIB and NetCDF files in the cycle and their MD5 checksums in case you would like to verify data integrity.
List of available parameters
Expand title Aerosol short name parameter ID name type of variable type of data (an,fc) type of level (sfc,pl,ml) aod1240 210216 Total Aerosol Optical Depth at 1240nm Expand title Aerosol expandshort name parameter ID name type of variable type of data (an,fc) type of level (pl,sfc,ml) aod1240 210216 Total Aerosol Optical Depth at 1240nm vertically-integrated an + fc sfc aod469 210213 Total Aerosol Optical Depth at 469nm vertically-integrated an + fc sfc aod550 210207 Total Aerosol Optical Depth at 550nm vertically-integrated an + fc sfc aod670 210214 Total Aerosol Optical Depth at 670nm vertically-integrated an + fc sfc aod865 210215 Total Aerosol Optical Depth at 865nm vertically-integrated an + fc sfc bcaod550 210211 Black Carbon Aerosol Optical Depth at 550nm vertically-integrated an + fc sfc duaod550 210209 Dust Aerosol Optical Depth at 550nm vertically-integrated an + fc sfc omaod550 210210 Organic Matter Aerosol Optical Depth at 550nmvertically-integrated an + fc sfc ssaod550 aod469 210208210213 Sea SaltTotal Aerosol Optical Depth at 550nm469nm vertically-integrated an + fc sfc suaod550 aod550 210212210207 SulphateTotal Aerosol Optical Depth at 550nm vertically-integrated an + fc sfc pm1 aod670 210072 Particulate matter d < 1 um surface concentration fc210214 Total Aerosol Optical Depth at 670nm vertically-integrated an + fc sfc pm10 aod865 210074 Particulate matter d < 10 um surface concentration fc210215 Total Aerosol Optical Depth at 865nm vertically-integrated an + fc sfc pm2p5 bcaod550 210073 Particulate matter d < 2.5 um surface concentration fc210211 Black Carbon Aerosol Optical Depth at 550nm vertically-integrated an + fc sfc niaod550 duaod550 210250 Nitrate aerosol optical depth at 550 nm210209 Dust Aerosol Optical Depth at 550nm vertically-integrated anan + fc sfc amaod550 omaod550 210251 Ammonium aerosol optical depth at 550 nm210210 Organic Matter Aerosol Optical Depth at 550nm vertically-integrated anan + fc sfc tc_h202 ssaod550 218003 Total Column Hydrogen Peroxide210208 Sea Salt Aerosol Optical Depth at 550nm vertically-integrated anan + fc sfc soaod550 aermr01 210001 Sea Salt Aerosol (0.03 - 0.5 um) Mixing Ratio concentration in air an + fc pl aermr02 210002 Sea Salt Aerosol (0.5 - 5 um) Mixing Ratio concentration in air an + fc pl aermr03 210003 Sea Salt Aerosol (5 - 20 um) Mixing Ratio concentration in air an + fc pl aermr04 210004 Dust Aerosol (0.03 - 0.55 um) Mixing Ratio concentration in air an + fc pl aermr05 210005 Dust Aerosol (0.55 - 0.9 um) Mixing Ratio concentration in air an + fc pl aermr06 210006 Dust Aerosol (0.9 - 20 um) Mixing Ratio concentration in air an + fc pl 215226 Secondary organic aerosol optical depth at 550 nm vertically-integrated an + fc sfc suaod550 210212 Sulphate Aerosol Optical Depth at 550nm vertically-integrated an + fc sfc niaod550 210250 Nitrate aerosol optical depth at 550 nm vertically-integrated an + fc sfc amaod550 210251 Ammonium aerosol optical depth at 550 nm vertically-integrated an + fc sfc pm1 210072 Particulate matter d < 1 um surface concentration fc sfc pm10 210074 Particulate matter d < 10 um surface concentration fc sfc pm2p5 210073 Particulate matter d < 2.5 um surface concentration fc sfc aermr01 210001 Sea Salt Aerosol (0.03 - 0.5 um) aermr07 210007 Hydrophilic Organic Matter AerosolMixing Ratio concentration in air an + fc ml + pl aermr08 aermr02 210008 Hydrophobic Organic Matter Aerosol210002 Sea Salt Aerosol (0.5 - 5 um) Mixing Ratio concentration in air an + fc ml + pl aermr09 aermr03 210009 Hydrophilic Black Carbon Aerosol210003 Sea Salt Aerosol (5 - 20 um) Mixing Ratio concentration in air an + fc ml + pl aermr10 aermr04 210010210004 Hydrophobic Black Carbon AerosolDust Aerosol (0.03 - 0.55 um) Mixing Ratio concentration in air an + fc ml + pl aermr11 aermr05 210011210005 Sulphate AerosolDust Aerosol (0.55 - 0.9 um) Mixing Ratio concentration in air an + fc ml + pl h2o2 aermr06 217003 Hydrogen Peroxide210006 Dust Aerosol (0.9 - 20 um) Mixing Ratio concentration in air an + fc plml + pl h2o2aermr07 217003 Hydrogen Peroxide210007 Hydrophilic Organic Matter Aerosol Mixing Ratio concentration in air an + fc mlml + pl aermr01 aermr08 210001 Sea Salt Aerosol (0.03 - 0.5 um)210008 Hydrophobic Organic Matter Aerosol Mixing Ratio concentration in air an + fcfc ml + pl aermr02 aermr09 210002 Sea Salt Aerosol (0.5 - 5 um)210009 Hydrophilic Black Carbon Aerosol Mixing Ratio concentration in air an + fcfc ml + pl aermr03 aermr10 210003 Sea Salt Aerosol (5 - 20 um)210010 Hydrophobic Black Carbon Aerosol Mixing Ratio concentration in air an + fcfc ml + pl aermr04 aermr11 210004210011 Dust Aerosol (0.03 - 0.55 um)Sulphate Aerosol Mixing Ratio concentration in air an + fcfc ml + pl aermr05 aermr16 210005 Dust Aerosol (0.55 - 0.9 um) Mixing Ratio210247 Nitrate fine mode aerosol mass mixing ratio concentration in air an + fcfc ml + pl aermr06 aermr17 210006 Dust Aerosol (0.9 - 20 um) Mixing Ratio210248 Nitrate coarse mode aerosol mass mixing ratio concentration in air an + fcfc ml + pl aermr07 aermr18 210007 Hydrophilic Organic Matter Aerosol Mixing Ratio210249 Ammonium aerosol mass mixing ratio concentration in air an + fcfc ml + pl aermr08 aermr01 210008 Hydrophobic Organic Matter Aerosol210001 Sea Salt Aerosol (0.03 - 0.5 um) Mixing Ratio concentration in air an + fc ml + pl aermr09 aermr02 210009 Hydrophilic Black Carbon Aerosol210002 Sea Salt Aerosol (0.5 - 5 um) Mixing Ratio concentration in air an + fc ml + pl aermr10 aermr03 210010 Hydrophobic Black Carbon Aerosol210003 Sea Salt Aerosol (5 - 20 um) Mixing Ratio concentration in air an + fc ml + pl aermr11aermr04 210011210004 Sulphate Aerosol Dust Aerosol (0.03 - 0.55 um) Mixing Ratio concentration in air an + fc ml + pl aermr05 210005 Dust Aerosol (0.55 - 0.9 um) Mixing Ratio concentration in air an + fc ml + pl aermr06 210006 Dust Aerosol (0.9 - 20 um) Mixing Ratio concentration in air an + fc ml + pl aermr07 210007 Hydrophilic Organic Matter Aerosol Mixing Ratio concentration in air an + fc ml + pl aermr08 210008 Hydrophobic Organic Matter Aerosol Mixing Ratio concentration in air an + fc ml + pl aermr09 210009 Hydrophilic Black Carbon Aerosol Mixing Ratio concentration in air an + fc ml + pl aermr10 210010 Hydrophobic Black Carbon Aerosol Mixing Ratio concentration in air an + fc ml + pl aermr11 210011 Sulphate Aerosol Mixing Ratio concentration in air an + fc ml + pl aermr16 210247 Nitrate fine mode aerosol mass mixing ratio concentration in air an + fc ml + pl aermr17 210248 Nitrate coarse mode aerosol mass mixing ratio concentration in air an + fc ml + pl aermr18 210249 Ammonium aerosol mass mixing ratio concentration in air an + fc ml + pl aermr19 210252 Biogenic secondary organic aerosol mass mixing ratio concentration in air an + fc ml + pl aermr20 210253 Anthropogenic secondary organic aerosol mass mixing ratio concentration in air an + fc ml + pl Expand title Gases short name parameter ID name type of variable type of data (an,fc) type of level (pl,sfc,ml) gtco3 210206 GEMS Total column ozone title Gases short name parameter ID name type of variable type of data (an,fc) type of level (pl,sfc,ml) gtco3 210206 GEMS Total column ozone vertically-integrated an +fc sfc tc_c2h6 218045 Total column ethane vertically-integrated an +fc sfc tc_c3h8 218047 Total column propane vertically-integrated an +fc sfc tc_c5h8 218016 Total column isoprene vertically-integrated an +fc sfc tc_ch4 218004 Total column methane vertically-integrated an +fc sfc tc_hno3 218006 Total column nitric acid vertically-integrated an +fc sfc tc_no 218027 Total column nitrogen monoxide vertically-integrated an +fc sfc tc_oh 218030 Total column hydroxyl radical vertically-integrated an +fc sfc tc_pan 218013 Total column peroxyacetyl nitrate vertically-integrated an +fc sfc tcco 210127 Total column Carbon monoxide vertically-integrated an +fc sfc tchcho 210128 Total column Formaldehyde vertically-integrated an +fc sfc tcno2 210125 Total column Nitrogen dioxide vertically-integrated an +fc sfc tcso2 210126 Total column Sulphur dioxide vertically-integrated an +fc sfc tc_c2h6 217045218045 Ethane concentration in airTotal column ethane vertically-integrated an +fc plsfc tc_c3h8 217047218047 Propane concentration in airTotal column propane vertically-integrated an +fc plsfc tc_c5h8 217016218016 Isoprene concentration in airTotal column isoprene vertically-integrated an +fc plsfc tc_ch4 _c217004 Methane (chemistry) concentration in air218004 Total column methane vertically-integrated an +fc plsfc co tc_hno3 210123 Carbon monoxide concentration in air218006 Total column nitric acid vertically-integrated an +fc plsfcgo3 tc_no 210203 GEMS Ozone 218027 Total column nitrogen monoxide vertically-integratedconcentration in air an +fc plsfchcho tc_oh 210124 Formaldehyde 218030 Total column hydroxyl radical vertically-integratedconcentration in air an +fc plsfchno3 tc_pan 217006 Nitric acid 218013 Total column peroxyacetyl nitrate vertically-integratedconcentration in air an +fc plsfc notcco 217027210127 Nitrogen Total column Carbon monoxide concentration in airvertically-integrated an +fc plsfc no2tchcho 210121 Nitrogen dioxide 210128 Total column Formaldehyde vertically-integratedconcentration in air an +fc plsfc ohtcno2 217030 Hydroxyl radical 210125 Total column Nitrogen dioxide vertically-integratedconcentration in air an +fc plsfc pantcso2 217013 Peroxyacetyl nitrate 210126 Total column Sulphur dioxide vertically-integratedconcentration in air an +fc plsfcso2 tc_h2o2 210122 Sulphur dioxide 218003 Total Column Hydrogen Peroxide vertically-integratedconcentration in air an + fcfc plsfc c2h6 tc_glyoxal 217045 Ethane concentration in air218107 Total column of glyoxal vertically-integrated an + fcfc mlsfc c3h8 tc_clo 217047 Propane concentration in air218174 Total column of chlorine monoxide vertically-integrated an + fcfc mlsfc c5h8 tc_clono2 217016 Isoprene concentration in air218064 Total column of chlorine nitrate vertically-integrated an + fcfc mlsfc ch4 tc_ chcl 217004 Methane (chemistry) concentration in air218200 Total column hydrogen chloride vertically-integrated an + fcfc mlsfc co tc_HCN 210123 Carbon monoxide concentration in air218226 Total column hydrogen cyanide vertically-integrated an + fcfc mlsfc go3 c2h6 210203217045 GEMS OzoneEthane concentration in air an +fc ml + pl hchoc3h8 210124217047 FormaldehydePropane concentration in air an +fc ml + pl hno3c5h8 217006217016 Nitric acidIsoprene concentration in air an +fc ml + pl noch4_c 217027 Nitrogen monoxide217004 Methane (chemistry) concentration in air an +fc ml + pl no2co 210121210123 Nitrogen dioxideCarbon monoxide concentration in air an +fc ml + pl ohgo3 217030210203 Hydroxyl radicalGEMS Ozone concentration in air an +fc ml + pl panhcho 217013210124 Peroxyacetyl nitrateFormaldehyde concentration in air an +fc ml + pl so2hno3 210122217006 Sulphur dioxideNitric acid concentration in air an +fc ml + pl Expand title Other (lsm, z, density, uvbed, uvbedcs) no 217027 Nitrogen monoxide concentration in air an +fc ml + pl no2 210121 Nitrogen dioxide concentration in air an +fc ml + pl oh 217030 Hydroxyl radical concentration in air an +fc ml + pl pan 217013 Peroxyacetyl nitrate concentration in air an +fc ml + pl so2 210122 Sulphur dioxide concentration in air an + fc ml + pl h2o2 217003 Hydrogen Peroxide concentration in air an + fc ml + pl c2h6 217045 Ethane concentration in air an + fc ml + pl c3h8 217047 Propane concentration in air short name parameter ID name type of variable type of data (an,fc) type of level (pl,sfc,ml) lsm 172 Land-sea mask 2D parameter an sfc z 129 Geopotential 2D parameter an sfc uvbed 214002 UV biologically effective dose 2D parameter fc sfc uvbedcs 214003 UV biologically effective dose clear-sky 2D parameter fc sfc den 3089 Density 3D parameter an + fc pl den 3089 Density 3D parameter
lnspan + fc ml + pl c5h8 152 Logarithm of surface pressure
2D parameter217016 Isoprene concentration in air an + fc ml
Data volumes per model cycle
The data volumes are based on the current CAMS experiment (link).
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file size (GRIB / NC)
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No. of fields
per file
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No. of variables
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No. of files (GRIB or NC)
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Total size (NC)
+ pl ch4_c 217004 Methane (chemistry) concentration in air an + fc ml + pl co 210123 Carbon monoxide concentration in air an + fc ml + pl go3 210203 GEMS Ozone concentration in air an + fc ml + pl hcho 210124 Formaldehyde concentration in air an + fc ml + pl glyoxal 217107 Glyoxal concentration in air an + fc ml + pl hno3 217006 Nitric acid concentration in air an + fc ml + pl no 217027 Nitrogen monoxide concentration in air an + fc ml + pl no2 210121 Nitrogen dioxide concentration in air an + fc ml + pl oh 217030 Hydroxyl radical concentration in air an + fc ml + pl pan 217013 Peroxyacetyl nitrate concentration in air an + fc ml + pl so2 210122 Sulphur dioxide concentration in air an + fc ml + pl h2o2 217003 Hydrogen Peroxide concentration in air an + fc ml + pl clo 217174 Chlorine monoxide concentration in air an + fc ml + pl clono2 217064 Chlorine nitrate concentration in air an + fc ml + pl hcl 217200 Hydrogen chloride concentration in air an + fc ml + pl HCN 217226 Hydrogen cyanide concentration in air an + fc ml + pl Expand title Other (lsm, z, density, uvbed, uvbedcs) short name parameter ID name type of variable type of data (an,fc) type of level (pl,sfc,ml) lsm 172 Land-sea mask 2D parameter an sfc z 129 Geopotential 2D parameter an sfc uvbed 214002 UV biologically effective dose 2D parameter fc sfc uvbedcs 214003 UV biologically effective dose clear-sky 2D parameter fc sfc den 3089 Density 3D parameter an + fc pl den 3089 Density 3D parameter an + fc ml lnsp 152 Logarithm of surface pressure 2D parameter an + fc ml z 129 Geopotential 2D parameter fc ml q 133 Specific humidity 3D parameter fc ml t 130 Temperature 3D parameter fc ml u 131 U-component of wind 3D parameter fc ml v 132 V-component of wind 3D parameter fc ml w 135 Vertical velocity 3D parameter fc ml
Data volumes per model cycle
The data volumes are based on the current CAMS experiment (link) and for guidance only.
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Due to the new compression method used, the GRIB file sizes vary much more than before. In this table the numbers are averages. * Please be aware that, the total volume will vary from one model run to the next one. |
average file size (GRIB / NC) | No. of fields per file | No. of variables | No. of files (GRIB or NC) | Total size (GRIB) | Total size (NC) | |
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an_ml | ~ 82 MB/144 MB | 137 | 33 | 33 | ~ 3 GB | 4.6 GB |
an_pl | ~ 28 MB/28 MB | 25 | 32 | 32 | ~ 881 MB | 899 MB |
an_sfc | ~ 1 MB/1.3 MB | 1 | 30 | 30 | ~ 33 MB | 38 MB |
fc_ml | ~ 77 MB/44 MB | 137 | 39 | 1599 | ~ 120 GB | 68 GB |
fc_pl | ~ 28 MB/8.3 MB | 25 | 32 | 1312 | ~ 35 GB | 10.7 GB |
fc_sfc | ~ 1 MB/435 kB | 1 | 33 | 3993 | ~ 4 GB | 1.7 GB |
Totals | 6999 | 163 GB* | 87 GB |
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This document has been produced in the context of theCopernicus Atmosphere Monitoring Service (CAMS). The activities leading to these results have been contracted by the European Centre for Medium-Range Weather Forecasts, operator of CAMS on behalf of the European Union (Delegation Agreement signed on 11/11/2014 and Contribution Agreement signed on 22/07/2021). All information in this document is provided "as is" and no guarantee or warranty is given that the information is fit for any particular purpose. The users thereof use the information at their sole risk and liability. For the avoidance of all doubt , the European Commission and the European Centre for Medium - Range Weather Forecasts have no liability in respect of this document, which is merely representing the author's view. |
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