GRIB library

FLEXPART expects meteorological input files to be in GRIB format, thus a GRIB decoding library is needed. GRIB is a compressed binary format for meteorological fields including metadata, defined by WMO.

There is GRIB1 and GRIB2 format. Since V8.0, FLEXPART can read GRIB2 (as well as GRIB1). Current operational NCEP GFS model data are disseminated in the GRIB2 format.

A recommended GRIB library implementation is ECMWF's GRIB_API. A Version >= 1.6.1 is needed for reading GRIB2 data. It can read the GRIB1 format as well.

The EMOS library can also be used, and since January 2014 it also offers GRIB2 capability, but by calling GRIB_API. EMOS has a number of interpolation functions for ECMWF data; they are not needed for running FLEXPART, so there is nothing to gain by using EMOSlib. If you have an older EMOSlib already installed, it will probably still work for decoding GRIB1 fields.

Recommended sources for GRIB libraries:

Last modified 4 years ago Last modified on Oct 16, 2014, 9:03:01 AM
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