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titleTable 1: per-user, global and system limits (last reviewed on 05 Nov 2020)


Per-user

Limit on simultaneous tasks/requests
Any request (web interface and API together)12
Requests that access the ECMWF archive1
Requests that access the online ADS data40
Global
Requests that can access archived regional forecast data1
Requests that can access latest regional forecast data1
Requests that access the ECMWF archive30
Requests that access the online ADS data180
System
Tasks of type 'adaptor'36
Tasks of type 'cdscompute'96


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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 2021)

DatasetNumber of fields limit

Adaptor

(indicates where the data are stored; see "Efficiency Tips" below)

Notes

CAMS global atmospheric composition forecasts

10000MARS 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.

CAMS global reanalysis (EAC4)

100000MARS 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.

CAMS global reanalysis (EAC4) monthly averaged fields

100000MARS InternalN/A

CAMS global inversion-optimised greenhouse gas fluxes and concentrations

500adaptor.urlStored locally on ADS disks

CAMS global greenhouse gas reanalysis (EGG4)

100000MARS external

Data are stored in ECMWF MARS tape archive

CAMS global greenhouse gas reanalysis (EGG4) monthly averaged fields

100000MARS externalData are stored in ECMWF MARS tape archive

CAMS solar radiation time-series

10000adaptor.cams_solar_rad2.retrieveThis 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.

CAMS European air quality forecasts

5000adaptor.cams_regional_fc.retrieve

There are three classes of speed at which these requests will be processed:

  1. Surface ensemble stored on ADS disks: fast-access
  2. Recent forecasts and analyses for other models/levels stored by third party: slow-access
  3. All other data are stored in a third party archive system:  access to this data is in general much slower than 1. and 2.

CAMS European air quality reanalyses

1000adaptor.urlCheck the documentation for data availability

CAMS global emission inventories

1000adaptor.url2.retrieveN/A

CAMS global radiative forcings

1000adaptor.url

CAMS global radiative forcing - auxilliary variables

1000adaptor.url

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