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Different projects have different needs, and therefore these rules may vary. Users are encouraged to visit the MARS archive catalogue in order to inspect how much related data an archive object contains. The description above is the rule, but resources available at certain times might cause to break it, e.g. 1 month of Analysis may be in 2 files because at that particular month the MARS system was short of disk space and data had to be written to tape earlier than desired.
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Post-processing
Any requested data manipulation or post-processing is carried out by the MARS client, except in the case of a local Member State's client where data is first processed at ECMWF prior to its transmission over the network. The post-processing is carried out by a set of routines present in the EMOSLIB library. Please, refer to the Field interpolation software routines for in-depth details about such post-processing.
Gliffy Diagram
Sub-area extraction
Most of the data at ECMWF is global. A sub-area can be created using the area keyword by defining its latitude and longitude boundaries: North/West/South/East.
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