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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 2022 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 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 |
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FTP server
| .ecmwf.int |
Data |
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directories | /DATA/CAMS_GLOBAL/${YYYYMMDDhh} |
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Retention policy
| /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 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]
Where:
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 |
Data organisation
The dataset is grouped by type of product (analysis or forecast), level type (surface parameter, pressure level or model level), by step or forecast range and by parameter.
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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 short 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 aermr01 duaod550 210001210209 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 aermr07 210007 Hydrophilic Organic Matter Aerosol Mixing Ratio concentration in air an + fc pl aermr08 210008 Hydrophobic Organic Matter Aerosol Mixing Ratio concentration in air an + fc pl aermr09 210009 Hydrophilic Black Carbon Aerosol Mixing Ratio concentration in air an + fc pl aermr10 210010 Hydrophobic Black Carbon Aerosol Mixing Ratio concentration in air an + fc pl aermr11 210011 Sulphate Aerosol Mixing Ratio concentration in air an + fc pl Dust Aerosol Optical Depth at 550nm vertically-integrated an + fc sfc omaod550 210210 Organic Matter Aerosol Optical Depth at 550nm vertically-integrated an + fc sfc ssaod550 210208 Sea Salt Aerosol Optical Depth at 550nm vertically-integrated an + fc sfc soaod550 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) Mixing Ratio concentration in air an + fcfc ml + pl aermr02 210002 Sea Salt Aerosol (0.5 - 5 um) Mixing Ratio concentration in air an + fcfc ml + pl aermr03 210003 Sea Salt Aerosol (5 - 20 um) Mixing Ratio concentration in air an + fcfc ml + pl aermr04 210004 Dust Aerosol (0.03 - 0.55 um) Mixing Ratio concentration in air an + fcfc ml + pl aermr05 210005 Dust Aerosol (0.55 - 0.9 um) Mixing Ratio concentration in air an + fcfc ml + pl aermr06 210006 Dust Aerosol (0.9 - 20 um) Mixing Ratio concentration in air an + fcfc ml + pl aermr07 210007 Hydrophilic Organic Matter Aerosol Mixing Ratio concentration in air an + fcfc ml + pl aermr08 210008 Hydrophobic Organic Matter Aerosol Mixing Ratio concentration in air an + fcfc ml + pl aermr09 210009 Hydrophilic Black Carbon Aerosol Mixing Ratio concentration in air an + fcfc ml + pl aermr10 210010 Hydrophobic Black Carbon Aerosol Mixing Ratio concentration in air an + fcfc ml + pl aermr11 210011 Sulphate Aerosol Mixing Ratio concentration in air an + fc fc ml + pl aermr16 title Gases 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 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-integratedan + fc sfc tc_c2h6 218045 Total column ethane
vertically-integratedml + pl aermr18 210249 Ammonium aerosol mass mixing ratio concentration in air 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 c2h6 217045 Ethane
c3h8ml + pl aermr01 210001 Sea Salt Aerosol (0.03 - 0.5 um) Mixing Ratio concentration in air an + fc ml + pl aermr02 210002 Sea Salt Aerosol (0.5 - 5 um) Mixing Ratio concentration in air an + fc ml + pl aermr03 210003 Sea Salt Aerosol (5 - 20 um) Mixing Ratio concentration in air an + fc ml + pl aermr04 210004 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 217047 Propane
c5h8210248 Nitrate coarse mode aerosol mass mixing ratio concentration in air an + fc ml + pl aermr18 217016 Isoprene
ch4_c210249 Ammonium aerosol mass mixing ratio concentration in air an + fc ml + pl aermr19 217004 Methane (chemistry)
co210252 Biogenic secondary organic aerosol mass mixing ratio concentration in air an + fc ml + pl aermr20 210123
Carbon monoxide210253 Anthropogenic secondary organic aerosol mass mixing ratio
go3concentration in air an + fc ml + pl Expand 210203 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 GEMS Ozone concentration in air an +fc pl hcho 210124 Formaldehyde concentration in air an +fc plsfchno3 tc_c2h6 217006 Nitric acid 218045 Total column ethane vertically-integratedconcentration in air an +fc plsfcno tc_c3h8 217027 Nitrogen monoxide 218047 Total column propane vertically-integratedconcentration in air an +fc plsfcno2 tc_c5h8 210121 Nitrogen dioxide 218016 Total column isoprene vertically-integratedconcentration in air an +fc plsfcoh tc_ch4 217030 Hydroxyl radical 218004 Total column methane vertically-integratedconcentration in air an +fc plsfcpan tc_hno3 217013 Peroxyacetyl nitrate 218006 Total column nitric acid vertically-integratedconcentration in air an +fc plsfcso2 tc_no 210122 Sulphur dioxide 218027 Total column nitrogen monoxide vertically-integratedconcentration in air an +fc plsfc c2h6 tc_oh 217045 Ethane concentration in air218030 Total column hydroxyl radical vertically-integrated an +fc mlsfc c3h8 tc_pan 217047 Propane concentration in air218013 Total column peroxyacetyl nitrate vertically-integrated an +fc mlsfc c5h8 tcco 217016 Isoprene concentration in air210127 Total column Carbon monoxide vertically-integrated an +fc mlsfc ch4_c tchcho 217004 Methane (chemistry) concentration in air210128 Total column Formaldehyde vertically-integrated an +fc mlsfc co tcno2 210123 Carbon monoxide concentration in air210125 Total column Nitrogen dioxide vertically-integrated an +fc mlsfc go3 tcso2 210203 GEMS Ozone concentration in air210126 Total column Sulphur dioxide vertically-integrated an +fc mlsfchcho tc_h2o2 210124 Formaldehyde 218003 Total Column Hydrogen Peroxide vertically-integratedconcentration in air an + fcfc mlsfchno3 tc_glyoxal 217006 Nitric acid 218107 Total column of glyoxal vertically-integratedconcentration in air an + fcfc mlsfc no tc_clo 217027 Nitrogen monoxide concentration in air218174 Total column of chlorine monoxide vertically-integrated an + fcfc mlsfcno2 tc_clono2 210121 Nitrogen dioxide 218064 Total column of chlorine nitrate vertically-integratedconcentration in air an + fcfc mlsfcoh tc_hcl 217030 Hydroxyl radical 218200 Total column hydrogen chloride vertically-integratedconcentration in air an + fcfc mlsfcpan tc_HCN 217013 Peroxyacetyl nitrate 218226 Total column hydrogen cyanide vertically-integratedconcentration in air an + fcfc mlsfc so2c2h6 210122217045 Sulphur dioxideEthane concentration in air an +fc ml + pl c3h8 title Other (lsm, z, density, uvbed, uvbedcs) 217047 Propane concentration in air an +fc ml + pl c5h8 217016 Isoprene concentration in air an +fc ml + 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 hno3 217006 Nitric acid 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 no 152 Logarithm of surface pressure
2D parameter217027 Nitrogen monoxide 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 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 an + fc ml + pl c5h8 217016 Isoprene concentration in air an + fc ml + 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) 10u 165 10m u-component of wind 2D parameter an + fc sfc 10v 166 10m v-component of wind 2D parameter an + fc sfc 2d 168 2m dewpoint temperature 2D parameter an + fc sfc 2t 167 2m temperature 2D parameter an + fc sfc lsm 172 Land-sea mask 2D parameter an sfc msl 151 Mean sea level pressure 2D parameter an + fc sfc z 129 Geopotential 2D parameter an + fc sfc sp 134 Surface pressure 2D parameter an + fc sfc twc 136 Total column water vapour 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 ml + pl lnsp 152 Logarithm of surface pressure 2D parameter an + fc ml + pl z 129 Geopotential 2D parameter an + fc ml + pl q 133 Specific humidity 3D parameter an + fc ml + pl t 130 Temperature 3D parameter an + fc ml + pl u 131 U-component of wind 3D parameter an + fc ml + pl v 132 V-component of wind 3D parameter an + fc ml + pl w 135 Vertical velocity 3D parameter an + fc ml + pl
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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