Hi all, I would like to add some further PSD options to ARTS (specifically ones for rain and graupel that are consistent with the single-moment schemes used in the Met Office NWP model). I will be making use of them by defining hydrometeor mass density fields and then using pnd_fieldCalcFromscat_speciesFields.
However, I'm a little bit confused as to the correct way to implement these (and there appears to be incomplete implementations of some of the existing options e.g. Abel & Boutle 2012 for rain, which happens to be one of the ones I'd like to use). The guidance in the arts developer guide also doesn't seem to follow what's actually in the code for some cases. So far I have: - added logic to pnd_fieldCalcFromscat_speciesFields to call pnd_fieldXXX for each of the new parametrizations - updated the documentation for pnd_fieldCalcFromscat_speciesFields in methods.cc to include the new parametrizations - added new pnd_fieldXXX function to microphysics.cc (not cloudbox.cc as suggested by the developer guide) to calculate the pnd field according to the raw PSD function psd_XXX and the scattering meta-data (and added this to microphysics.h as well) - added new "raw" psd calculation psd_XXX to psd.cc This seems to be all that is required to make my use-case work, but I can see that it is not quite complete. In particular, I believe that I should add a new workspace method dNdD_XXX to allow a direct calculation of the raw PSD. Should this go in m_microphysics.cc (and be added to methods.cc)? This seems to be where other ones are, but again the developer guide suggests it should be in m_cloudbox.cc. What is the purpose of the psd_XXX functions in m_psd.cc? Are these also required? Thanks for your help, Stuart Dr Stuart Fox Radiation Research Manager Met Office FitzRoy Road Exeter Devon EX1 3PB United Kingdom Tel: +44 (0) 330 135 2480 Fax: +44 (0)1392 885681 Email: stuart....@metoffice.gov.uk Website: www.metoffice.gov.uk See our guide to climate change at http://www.metoffice.gov.uk/climate-change/guide/
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