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. For other data access options please see here.
Please see 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.
- Log on to www.ecmwf.int. (If you do not have an account create one)
- Read the CAMS data licence and accept the license at the bottom of the page.
- Send an email to copernicus-support@ecmwf.int, 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
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 |
| 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_ contains all the pressure levels of +12 step CO fields from a forecast started on 7 July 2016 at 00:00 UTC.c_ ecmf_20160704000000_prod_fc_pl_012_co.grib
z_cams_ 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.c_ ecmf_20160704120000_prod_fc_ml_012_go3.nc
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 successfuly 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 name | parameter ID | name |
|---|---|---|
| aod1240 | 210216 | Total Aerosol Optical Depth at 1240nm |
| aod469 | 210213 | Total Aerosol Optical Depth at 469nm |
| aod550 | 210207 | Total Aerosol Optical Depth at 550nm |
| aod670 | 210214 | Total Aerosol Optical Depth at 670nm |
| aod865 | 210215 | Total Aerosol Optical Depth at 865nm |
| bcaod550 | 210211 | Black Carbon Aerosol Optical Depth at 550nm |
| duaod550 | 210209 | Dust Aerosol Optical Depth at 550nm |
| gtco3 | 210206 | GEMS Total column ozone |
| lsm | 172 | Land-sea mask |
| omaod550 | 210210 | Organic Matter Aerosol Optical Depth at 550nm |
| ssaod550 | 210208 | Sea Salt Aerosol Optical Depth at 550nm |
| suaod550 | 210212 | Sulphate Aerosol Optical Depth at 550nm |
| tc_c2h6 | 218045 | Total column ethane |
| tc_c3h8 | 218047 | Total column propane |
| tc_c5h8 | 218016 | Total column isoprene |
| tc_ch4 | 218004 | Total column methane |
| tc_hno3 | 218006 | Total column nitric acid |
| tc_no | 218027 | Total column nitrogen monoxide |
| tc_oh | 218030 | Total column hydroxyl radical |
| tc_pan | 218013 | Total column peroxyacetyl nitrate |
| tcco | 210127 | Total column Carbon monoxide |
| tchcho | 210128 | Total column Formaldehyde |
| tcno2 | 210125 | Total column Nitrogen dioxide |
| tcso2 | 210126 | Total column Sulphur dioxide |
| z | 129 | Geopotential |
Analysis pressure level parameters
| short name | parameter ID | name |
|---|---|---|
| aermr01 | 210001 | Sea Salt Aerosol (0.03 - 0.5 um) Mixing Ratio |
| aermr02 | 210002 | Sea Salt Aerosol (0.5 - 5 um) Mixing Ratio |
| aermr03 | 210003 | Sea Salt Aerosol (5 - 20 um) Mixing Ratio |
| aermr04 | 210004 | Dust Aerosol (0.03 - 0.55 um) Mixing Ratio |
| aermr05 | 210005 | Dust Aerosol (0.55 - 0.9 um) Mixing Ratio |
| aermr06 | 210006 | Dust Aerosol (0.9 - 20 um) Mixing Ratio |
| aermr07 | 210007 | Hydrophilic Organic Matter Aerosol Mixing Ratio |
| aermr08 | 210008 | Hydrophobic Organic Matter Aerosol Mixing Ratio |
| aermr09 | 210009 | Hydrophilic Black Carbon Aerosol Mixing Ratio |
| aermr10 | 210010 | Hydrophobic Black Carbon Aerosol Mixing Ratio |
| aermr11 | 210011 | Sulphate Aerosol Mixing Ratio |
| c2h6 | 217045 | Ethane |
| c3h8 | 217047 | Propane |
| c5h8 | 217016 | Isoprene |
| ch4_c | 217004 | Methane (chemistry) |
| co | 210123 | Carbon monoxide |
| den | 3089 | Density |
| go3 | 210203 | GEMS Ozone |
| hcho | 210124 | Formaldehyde |
| hno3 | 217006 | Nitric acid |
| no | 217027 | Nitrogen monoxide |
| no2 | 210121 | Nitrogen dioxide |
| oh | 217030 | Hydroxyl radical |
| pan | 217013 | Peroxyacetyl nitrate |
| so2 | 210122 | Sulphur dioxide |
Analysis model level parameters
| short name | parameter ID | name |
|---|---|---|
| aermr01 | 210001 | Sea Salt Aerosol (0.03 - 0.5 um) Mixing Ratio |
| aermr02 | 210002 | Sea Salt Aerosol (0.5 - 5 um) Mixing Ratio |
| aermr03 | 210003 | Sea Salt Aerosol (5 - 20 um) Mixing Ratio |
| aermr04 | 210004 | Dust Aerosol (0.03 - 0.55 um) Mixing Ratio |
| aermr05 | 210005 | Dust Aerosol (0.55 - 0.9 um) Mixing Ratio |
| aermr06 | 210006 | Dust Aerosol (0.9 - 20 um) Mixing Ratio |
| aermr07 | 210007 | Hydrophilic Organic Matter Aerosol Mixing Ratio |
| aermr08 | 210008 | Hydrophobic Organic Matter Aerosol Mixing Ratio |
| aermr09 | 210009 | Hydrophilic Black Carbon Aerosol Mixing Ratio |
| aermr10 | 210010 | Hydrophobic Black Carbon Aerosol Mixing Ratio |
| aermr11 | 210011 | Sulphate Aerosol Mixing Ratio |
| c2h6 | 217045 | Ethane |
| c3h8 | 217047 | Propane |
| c5h8 | 217016 | Isoprene |
| ch4_c | 217004 | Methane (chemistry) |
| co | 210123 | Carbon monoxide |
| den | 3089 | Density |
| go3 | 210203 | GEMS Ozone |
| hcho | 210124 | Formaldehyde |
| hno3 | 217006 | Nitric acid |
| lnsp | 152 | Logarithm of surface pressure |
| no | 217027 | Nitrogen monoxide |
| no2 | 210121 | Nitrogen dioxide |
| oh | 217030 | Hydroxyl radical |
| pan | 217013 | Peroxyacetyl nitrate |
| so2 | 210122 | Sulphur dioxide |
Forecast surface parameters
| short name | parameter ID | name |
|---|---|---|
| aod1240 | 210216 | Total Aerosol Optical Depth at 1240nm |
| aod469 | 210213 | Total Aerosol Optical Depth at 469nm |
| aod550 | 210207 | Total Aerosol Optical Depth at 550nm |
| aod670 | 210214 | Total Aerosol Optical Depth at 670nm |
| aod865 | 210215 | Total Aerosol Optical Depth at 865nm |
| bcaod550 | 210211 | Black Carbon Aerosol Optical Depth at 550nm |
| duaod550 | 210209 | Dust Aerosol Optical Depth at 550nm |
| gtco3 | 210206 | GEMS Total column ozone |
| omaod550 | 210210 | Organic Matter Aerosol Optical Depth at 550nm |
| pm1 | 210072 | Particulate matter d < 1 um |
| pm10 | 210074 | Particulate matter d < 10 um |
| pm2p5 | 210073 | Particulate matter d < 2.5 um |
| ssaod550 | 210208 | Sea Salt Aerosol Optical Depth at 550nm |
| suaod550 | 210212 | Sulphate Aerosol Optical Depth at 550nm |
| tc_c2h6 | 218045 | Total column ethane |
| tc_c3h8 | 218047 | Total column propane |
| tc_c5h8 | 218016 | Total column isoprene |
| tc_ch4 | 218004 | Total column methane |
| tc_hno3 | 218006 | Total column nitric acid |
| tc_no | 218027 | Total column nitrogen monoxide |
| tc_oh | 218030 | Total column hydroxyl radical |
| tc_pan | 218013 | Total column peroxyacetyl nitrate |
| tcco | 210127 | Total column Carbon monoxide |
| tchcho | 210128 | Total column Formaldehyde |
| tcno2 | 210125 | Total column Nitrogen dioxide |
| tcso2 | 210126 | Total column Sulphur dioxide |
| uvbed | 214002 | UV biologically effective dose |
| uvbedcs | 214003 | UV biologically effective dose clear-sky |
Forecast pressure level parameters
| short name | parameter ID | name |
|---|---|---|
| aermr01 | 210001 | Sea Salt Aerosol (0.03 - 0.5 um) Mixing Ratio |
| aermr02 | 210002 | Sea Salt Aerosol (0.5 - 5 um) Mixing Ratio |
| aermr03 | 210003 | Sea Salt Aerosol (5 - 20 um) Mixing Ratio |
| aermr04 | 210004 | Dust Aerosol (0.03 - 0.55 um) Mixing Ratio |
| aermr05 | 210005 | Dust Aerosol (0.55 - 0.9 um) Mixing Ratio |
| aermr06 | 210006 | Dust Aerosol (0.9 - 20 um) Mixing Ratio |
| aermr07 | 210007 | Hydrophilic Organic Matter Aerosol Mixing Ratio |
| aermr08 | 210008 | Hydrophobic Organic Matter Aerosol Mixing Ratio |
| aermr09 | 210009 | Hydrophilic Black Carbon Aerosol Mixing Ratio |
| aermr10 | 210010 | Hydrophobic Black Carbon Aerosol Mixing Ratio |
| aermr11 | 210011 | Sulphate Aerosol Mixing Ratio |
| c2h6 | 217045 | Ethane |
| c3h8 | 217047 | Propane |
| c5h8 | 217016 | Isoprene |
| ch4_c | 217004 | Methane (chemistry) |
| co | 210123 | Carbon monoxide |
| den | 3089 | Density |
| go3 | 210203 | GEMS Ozone |
| hcho | 210124 | Formaldehyde |
| hno3 | 217006 | Nitric acid |
| no | 217027 | Nitrogen monoxide |
| no2 | 210121 | Nitrogen dioxide |
| oh | 217030 | Hydroxyl radical |
| pan | 217013 | Peroxyacetyl nitrate |
| so2 | 210122 | Sulphur dioxide |
Forecast model level parameters
| short name | parameter ID | name |
|---|---|---|
| aermr01 | 210001 | Sea Salt Aerosol (0.03 - 0.5 um) Mixing Ratio |
| aermr02 | 210002 | Sea Salt Aerosol (0.5 - 5 um) Mixing Ratio |
| aermr03 | 210003 | Sea Salt Aerosol (5 - 20 um) Mixing Ratio |
| aermr04 | 210004 | Dust Aerosol (0.03 - 0.55 um) Mixing Ratio |
| aermr05 | 210005 | Dust Aerosol (0.55 - 0.9 um) Mixing Ratio |
| aermr06 | 210006 | Dust Aerosol (0.9 - 20 um) Mixing Ratio |
| aermr07 | 210007 | Hydrophilic Organic Matter Aerosol Mixing Ratio |
| aermr08 | 210008 | Hydrophobic Organic Matter Aerosol Mixing Ratio |
| aermr09 | 210009 | Hydrophilic Black Carbon Aerosol Mixing Ratio |
| aermr10 | 210010 | Hydrophobic Black Carbon Aerosol Mixing Ratio |
| aermr11 | 210011 | Sulphate Aerosol Mixing Ratio |
| c2h6 | 217045 | Ethane |
| c3h8 | 217047 | Propane |
| c5h8 | 217016 | Isoprene |
| ch4_c | 217004 | Methane (chemistry) |
| co | 210123 | Carbon monoxide |
| den | 3089 | Density |
| go3 | 210203 | GEMS Ozone |
| hcho | 210124 | Formaldehyde |
| hno3 | 217006 | Nitric acid |
| lnsp | 152 | Logarithm of surface pressure |
| no | 217027 | Nitrogen monoxide |
| no2 | 210121 | Nitrogen dioxide |
| oh | 217030 | Hydroxyl radical |
| pan | 217013 | Peroxyacetyl nitrate |
| so2 | 210122 | Sulphur dioxide |
Data volumes per model cycle
The data volumes are based on the current CAMS experiment (link).
file size (GRIB / NC) | No. of fields | No. of variables | No. of files (GRIB or NC) | Total size (GRIB) | Total size (NC) | |
|---|---|---|---|---|---|---|
| an_sfc | 1.2 MB / 800 kB | 1 | 15 | 15 | 18 MB | 12 MB |
an_pl | 30 MB / 20 MB | 25 | 16 | 24 | 697 MB | 465 MB |
| an_ml | 70 MB / 47 MB | 60 | 16 | 25 | 1,7 GB | 1,1 GB |
| fc_sfc | 1.2 MB / 800 kB | 1 | 26 | 3388 | 3,9 GB | 2,6 GB |
| fc_pl | 30 MB / 20 MB | 25 | 24 | 984 | 28 GB | 19 GB |
| fc_ml | 70 MB / 47 MB | 60 | 25 | 1025 | 68 GB | 45 GB |
| Total | 5461 | 102 GB | 68 GB |
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