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 composition variables below and make sure your variables of interest are available. 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.

1. Log on to www.ecmwf.int. (If you do not have an account create one)
2. Read the Licence to Use Copernicus Products and accept the license at the bottom of the page.
3. Contact us by creating a ticket through the ECMWF Support Portal, providing 
   1. the user name you used to log into www.ecmwf.int and accept the license
   2. 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

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:

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. 

Examples:

z_cams_c_ecmf_20160704000000_prod_an_sfc_000_tchcho.grib  contains analysis field of total column formaldehyde computed on 7 July 2016 at 00:00 UTC.

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_20160704120000_prod_fc_ml_012_go3.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 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

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  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 550nm vertically-integrated  an + fc  sfc ssaod550 210208 Sea Salt Aerosol Optical Depth at 550nm 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 + 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 aermr16 210247 Nitrate fine mode aerosol mass mixing ratio concentration in air an + fc pl aermr17 210248 Nitrate coarse mode aerosol mass mixing ratio concentration in air an + fc pl aermr18 210249 Ammonium aerosol mass mixing ratio concentration in air an + fc pl aermr01 210001 Sea Salt Aerosol (0.03 - 0.5 um) Mixing Ratio concentration in air an + fc  ml aermr02 210002 Sea Salt Aerosol (0.5 - 5 um) Mixing Ratio concentration in air an + fc  ml aermr03 210003 Sea Salt Aerosol (5 - 20 um) Mixing Ratio concentration in air an + fc  ml aermr04 210004 Dust Aerosol (0.03 - 0.55 um) Mixing Ratio concentration in air an + fc  ml aermr05 210005 Dust Aerosol (0.55 - 0.9 um) Mixing Ratio concentration in air an + fc  ml aermr06 210006 Dust Aerosol (0.9 - 20 um) Mixing Ratio concentration in air an + fc  ml aermr07 210007 Hydrophilic Organic Matter Aerosol Mixing Ratio concentration in air an + fc  ml aermr08 210008 Hydrophobic Organic Matter Aerosol Mixing Ratio concentration in air an + fc  ml aermr09 210009 Hydrophilic Black Carbon Aerosol Mixing Ratio concentration in air an + fc  ml aermr10 210010 Hydrophobic Black Carbon Aerosol Mixing Ratio concentration in air an + fc  ml aermr11 210011 Sulphate Aerosol Mixing Ratio concentration in air an + fc  ml aermr16 210247 Nitrate fine mode aerosol mass mixing ratio concentration in air an + fc ml aermr17 210248 Nitrate coarse mode aerosol mass mixing ratio concentration in air an + fc ml aermr18 210249 Ammonium aerosol mass mixing ratio concentration in air an + fc ml

  
  

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  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_h2o2 218003 Total Column Hydrogen Peroxide vertically-integrated an + fc  sfc c2h6 217045 Ethane concentration in air an +fc pl c3h8 217047 Propane concentration in air an +fc pl c5h8 217016 Isoprene concentration in air an +fc pl ch4_c 217004 Methane (chemistry) concentration in air an +fc pl co 210123 Carbon monoxide concentration in air an +fc pl go3 210203 GEMS Ozone concentration in air an +fc pl hcho 210124 Formaldehyde concentration in air an +fc pl hno3 217006 Nitric acid concentration in air an +fc pl no 217027 Nitrogen monoxide concentration in air an +fc pl no2 210121 Nitrogen dioxide concentration in air an +fc pl oh 217030 Hydroxyl radical concentration in air an +fc pl pan 217013 Peroxyacetyl nitrate concentration in air an +fc pl so2 210122 Sulphur dioxide concentration in air an + fc pl h2o2 217003 Hydrogen Peroxide concentration in air an + fc pl  c2h6 217045 Ethane concentration in air an + fc ml c3h8 217047 Propane concentration in air an + fc ml c5h8 217016 Isoprene concentration in air an + fc ml ch4_c 217004 Methane (chemistry) concentration in air an + fc ml co 210123 Carbon monoxide concentration in air an + fc ml go3 210203 GEMS Ozone concentration in air an + fc ml hcho 210124 Formaldehyde concentration in air an + fc ml hno3 217006 Nitric acid concentration in air an + fc ml no 217027 Nitrogen monoxide concentration in air an + fc ml no2 210121 Nitrogen dioxide concentration in air an + fc ml oh 217030 Hydroxyl radical concentration in air an + fc ml pan 217013 Peroxyacetyl nitrate concentration in air an + fc ml so2 210122 Sulphur dioxide concentration in air an + fc ml h2o2 217003 Hydrogen Peroxide concentration in air an + fc ml

  
  

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  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).

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