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Table 2 Summary of the number of fields limits, as well as the major features of all ADS datasets (last reviewed on 16 September 202126 April 2023)
| Dataset | Number of fields limit | Volume size limit | Adaptor (indicates where the data are stored; see "Efficiency Tips" below) | Notes |
| 10000 | 175 GB for GRIB files, 30 GB for netCDF files | MARS Internal/external | Those variables listed as fast-access are readily available from ADS disks. Those variables listed as slow-access and data older than 30 days are stored in ECMWF MARS tape archive. | |
| 100000 | 175 GB for GRIB files, 30 GB for netCDF files | MARS Internal/external | Those variables listed as fast-access are readily available from ADS disks. Those variables listed as slow-access are stored in ECMWF MARS tape archive. | |
| 100000 | 175 GB for GRIB files, 30 GB for netCDF files | MARS Internal | N/A | |
CAMS global inversion-optimised greenhouse gas fluxes and concentrations | 500 | N/A | adaptor.url | Stored locally on ADS disks |
| 100000 | 175 GB for GRIB files, 30 GB for netCDF files | MARS external | Data are stored in ECMWF MARS tape archive | |
CAMS global greenhouse gas reanalysis (EGG4) monthly averaged fields | 100000 | 175 GB for GRIB files, 30 GB for netCDF files | MARS external | Data are stored in ECMWF MARS tape archive |
| 10000 | N/A | adaptor.cams_solar_rad2.retrieve | This data is calculated on demand by a service jointly provided by DLR, Armines, and Transvalor. The ADS forwards requests to this service and returns the data from it. | |
| 5000 | N/A | adaptor.cams_regional_fc.retrieve | There are three classes of speed at which these requests will be processed:
| |
| 1000 | N/A | adaptor.url | Check the documentation for data availability | |
| 1000 | N/A | adaptor.url2.retrieve | N/A | |
| 1000 | N/A | adaptor.url | ||
| 1000 | N/A | adaptor.url |
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