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- 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.
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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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