Background

We need to retrieve three types of files efficiently for the two reanalyses with experiment id = 21 and experiment id = 22. These are all class=ea. The three "streams" are oper, moda and mfb:

• Stream: Atmospheric daily analyses (oper)
• Stream: Monthly means of Daily Means (moda)
• Stream: Observation departures for the data used in the reanalyses (mfb)

Retrieval of daily "oper" files

The availability of the oper files for experiment  = 21 is given here, and the availability of experiment = 22 is here. These pages also enable users to estimate the download costs.