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Metview Macro Library function. Computes the total column integrated mass for the "mdc" (mass density concentration) fields in a FLEXPART output GRIB file.
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Parameter infile is a FLEXPART output GRIB file; ageclass is the FLEXPART ageclass. If ageclass is set to -1 all the ageclasses are used Ageclass indexing starts at 1.
Example
# to compute the total column integrated mass for all the ageclasses
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