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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.

Please see the list of available atmospheric composition variables below and make sure your variables of interest are available. Please contact us if you require any additional species.

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 CAMS data licence and accept the license at the bottom of the page.
  3. Send an email to copernicus-support@ecmwf.int, 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

FTP server

ftp://dissemination.ecmwf.int

Data directory

/DATA/CAMS_GLOBAL/${YYYYMMDDhh}

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

grib, nc

 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. 

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

Analysis surface parameters

short nameparameter IDname
aod1240210216Total Aerosol Optical Depth at 1240nm
aod469210213Total Aerosol Optical Depth at 469nm
aod550210207Total Aerosol Optical Depth at 550nm
aod670210214Total Aerosol Optical Depth at 670nm
aod865210215Total Aerosol Optical Depth at 865nm
bcaod550210211Black Carbon Aerosol Optical Depth at 550nm
duaod550210209Dust Aerosol Optical Depth at 550nm
gtco3210206GEMS Total column ozone
lsm172Land-sea mask
omaod550210210Organic Matter Aerosol Optical Depth at 550nm
ssaod550210208Sea Salt Aerosol Optical Depth at 550nm
suaod550210212Sulphate Aerosol Optical Depth at 550nm
tc_c2h6218045Total column ethane
tc_c3h8218047Total column propane
tc_c5h8218016Total column isoprene
tc_ch4218004Total column methane
tc_hno3218006Total column nitric acid
tc_no218027Total column nitrogen monoxide
tc_oh218030Total column hydroxyl radical
tc_pan218013Total column peroxyacetyl nitrate
tcco210127Total column Carbon monoxide
tchcho210128Total column Formaldehyde
tcno2210125Total column Nitrogen dioxide
tcso2210126Total column Sulphur dioxide
z129Geopotential

Analysis pressure level parameters

short nameparameter IDname
aermr01210001Sea Salt Aerosol (0.03 - 0.5 um) Mixing Ratio
aermr02210002Sea Salt Aerosol (0.5 - 5 um) Mixing Ratio
aermr03210003Sea Salt Aerosol (5 - 20 um) Mixing Ratio
aermr04210004Dust Aerosol (0.03 - 0.55 um) Mixing Ratio
aermr05210005Dust Aerosol (0.55 - 0.9 um) Mixing Ratio
aermr06210006Dust Aerosol (0.9 - 20 um) Mixing Ratio
aermr07210007Hydrophilic Organic Matter Aerosol Mixing Ratio
aermr08210008Hydrophobic Organic Matter Aerosol Mixing Ratio
aermr09210009Hydrophilic Black Carbon Aerosol Mixing Ratio
aermr10210010Hydrophobic Black Carbon Aerosol Mixing Ratio
aermr11210011Sulphate Aerosol Mixing Ratio
c2h6217045Ethane
c3h8217047Propane
c5h8217016Isoprene
ch4_c217004Methane (chemistry)
co210123Carbon monoxide
den3089Density
go3210203GEMS Ozone
hcho210124Formaldehyde
hno3217006Nitric acid
no217027Nitrogen monoxide
no2210121Nitrogen dioxide
oh217030Hydroxyl radical
pan217013Peroxyacetyl nitrate
so2210122Sulphur dioxide

Analysis model level parameters

short nameparameter IDname
aermr01210001Sea Salt Aerosol (0.03 - 0.5 um) Mixing Ratio
aermr02210002Sea Salt Aerosol (0.5 - 5 um) Mixing Ratio
aermr03210003Sea Salt Aerosol (5 - 20 um) Mixing Ratio
aermr04210004Dust Aerosol (0.03 - 0.55 um) Mixing Ratio
aermr05210005Dust Aerosol (0.55 - 0.9 um) Mixing Ratio
aermr06210006Dust Aerosol (0.9 - 20 um) Mixing Ratio
aermr07210007Hydrophilic Organic Matter Aerosol Mixing Ratio
aermr08210008Hydrophobic Organic Matter Aerosol Mixing Ratio
aermr09210009Hydrophilic Black Carbon Aerosol Mixing Ratio
aermr10210010Hydrophobic Black Carbon Aerosol Mixing Ratio
aermr11210011Sulphate Aerosol Mixing Ratio
c2h6217045Ethane
c3h8217047Propane
c5h8217016Isoprene
ch4_c217004Methane (chemistry)
co210123Carbon monoxide
den3089Density
go3210203GEMS Ozone
hcho210124Formaldehyde
hno3217006Nitric acid
lnsp152Logarithm of surface pressure
no217027Nitrogen monoxide
no2210121Nitrogen dioxide
oh217030Hydroxyl radical
pan217013Peroxyacetyl nitrate
so2210122Sulphur dioxide

Forecast surface parameters

short nameparameter IDname
aod1240210216Total Aerosol Optical Depth at 1240nm
aod469210213Total Aerosol Optical Depth at 469nm
aod550210207Total Aerosol Optical Depth at 550nm
aod670210214Total Aerosol Optical Depth at 670nm
aod865210215Total Aerosol Optical Depth at 865nm
bcaod550210211Black Carbon Aerosol Optical Depth at 550nm
duaod550210209Dust Aerosol Optical Depth at 550nm
gtco3210206GEMS Total column ozone
omaod550210210Organic Matter Aerosol Optical Depth at 550nm
pm1210072Particulate matter d < 1 um
pm10210074Particulate matter d < 10 um
pm2p5210073Particulate matter d < 2.5 um
ssaod550210208Sea Salt Aerosol Optical Depth at 550nm
suaod550210212Sulphate Aerosol Optical Depth at 550nm
tc_c2h6218045Total column ethane
tc_c3h8218047Total column propane
tc_c5h8218016Total column isoprene
tc_ch4218004Total column methane
tc_hno3218006Total column nitric acid
tc_no218027Total column nitrogen monoxide
tc_oh218030Total column hydroxyl radical
tc_pan218013Total column peroxyacetyl nitrate
tcco210127Total column Carbon monoxide
tchcho210128Total column Formaldehyde
tcno2210125Total column Nitrogen dioxide
tcso2210126Total column Sulphur dioxide
uvbed214002UV biologically effective dose
uvbedcs214003UV biologically effective dose clear-sky

Forecast pressure level parameters

short nameparameter IDname
aermr01210001Sea Salt Aerosol (0.03 - 0.5 um) Mixing Ratio
aermr02210002Sea Salt Aerosol (0.5 - 5 um) Mixing Ratio
aermr03210003Sea Salt Aerosol (5 - 20 um) Mixing Ratio
aermr04210004Dust Aerosol (0.03 - 0.55 um) Mixing Ratio
aermr05210005Dust Aerosol (0.55 - 0.9 um) Mixing Ratio
aermr06210006Dust Aerosol (0.9 - 20 um) Mixing Ratio
aermr07210007Hydrophilic Organic Matter Aerosol Mixing Ratio
aermr08210008Hydrophobic Organic Matter Aerosol Mixing Ratio
aermr09210009Hydrophilic Black Carbon Aerosol Mixing Ratio
aermr10210010Hydrophobic Black Carbon Aerosol Mixing Ratio
aermr11210011Sulphate Aerosol Mixing Ratio
c2h6217045Ethane
c3h8217047Propane
c5h8217016Isoprene
ch4_c217004Methane (chemistry)
co210123Carbon monoxide
den3089Density
go3210203GEMS Ozone
hcho210124Formaldehyde
hno3217006Nitric acid
no217027Nitrogen monoxide
no2210121Nitrogen dioxide
oh217030Hydroxyl radical
pan217013Peroxyacetyl nitrate
so2210122Sulphur dioxide

Forecast model level parameters

short nameparameter IDname
aermr01210001Sea Salt Aerosol (0.03 - 0.5 um) Mixing Ratio
aermr02210002Sea Salt Aerosol (0.5 - 5 um) Mixing Ratio
aermr03210003Sea Salt Aerosol (5 - 20 um) Mixing Ratio
aermr04210004Dust Aerosol (0.03 - 0.55 um) Mixing Ratio
aermr05210005Dust Aerosol (0.55 - 0.9 um) Mixing Ratio
aermr06210006Dust Aerosol (0.9 - 20 um) Mixing Ratio
aermr07210007Hydrophilic Organic Matter Aerosol Mixing Ratio
aermr08210008Hydrophobic Organic Matter Aerosol Mixing Ratio
aermr09210009Hydrophilic Black Carbon Aerosol Mixing Ratio
aermr10210010Hydrophobic Black Carbon Aerosol Mixing Ratio
aermr11210011Sulphate Aerosol Mixing Ratio
c2h6217045Ethane
c3h8217047Propane
c5h8217016Isoprene
ch4_c217004Methane (chemistry)
co210123Carbon monoxide
den3089Density
go3210203GEMS Ozone
hcho210124Formaldehyde
hno3217006Nitric acid
lnsp152Logarithm of surface pressure
no217027Nitrogen monoxide
no2210121Nitrogen dioxide
oh217030Hydroxyl radical
pan217013Peroxyacetyl nitrate
so2210122Sulphur dioxide

 Data volumes per model cycle

The data volumes are based on the current CAMS experiment (link).


 

file size (GRIB / NC)

No. of fields
per file

No. of variables

No. of files (GRIB or NC)

Total size (GRIB)

Total size (NC)

an_sfc1.2 MB / 800 kB1151518 MB12 MB

an_pl

30 MB / 20 MB251624697 MB465 MB
an_ml70 MB / 47 MB6016251,7 GB1,1 GB
fc_sfc1.2 MB / 800 kB12633883,9 GB2,6 GB
fc_pl30 MB / 20 MB252498428 GB19 GB
fc_ml70 MB / 47 MB6025102568 GB45 GB
  Total 5461102 GB68 GB

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