unithickness

unithickness(lnsp[, levels][, lnsp_code])
unithickness(lnsp, fs_levels[, lnsp_code])

Computes the pressure thickness in Pa of a list of ECMWF model levels from lnsp (logarithm of surface pressure).

Parameters

  • lnsp (Fieldset) – lnsp fieldset defined on model level 1

  • fs_levels (Fieldset) – fieldset defining the target model levels

  • lnsp_code (number) – ecCodes paramId for lnsp

  • levels (list) – list of target model levels whose thickness will be computed

Return type

Fieldset

lnsp must contain an lnsp field, which is identified by its ecCodes paramId. By default the value of 152 is used but it can be overridden by the optional lnsp_code.

The list of target model levels depends on the actual arguments:

  • if no fs_levels is specified the thickness is computed for all the model levels defined by the GRIB header in lnsp.

  • if fs_levels is specified the thickness is computed for all the model levels in fs_levels.

  • if levels is specified it defines the list of target model levels whose thickness will be computed.

A missing value in lnsp will result in a missing value in the corresponding place in the output fieldset.