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Description of the numerical weather prediction products at MET Norway
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Parameters MET Nordic #8

Closed kristss closed 2 years ago

kristss commented 2 years ago

Are the parameters cloud_area_fraction and integral_of_surface_downwelling_shortwave_flux_in_air just the nearest neighbour of the raw model output at 2.5 km resolution? Or is there some post-processing or downscaling applied to the analysis and forecast products like nearest neighbourhood area selection? In the pdf about MEPS linked to on the MEPS AROME Arctic wiki page, it is written that post-processed cloud area fractions are the median value of a neighbourhood area of 37.5x37.5 km, but I notice that the information is a few years old and applied to the old pp products.

cristianlussana commented 2 years ago

MET Nordic post-processing for the parameters cloud_area_fraction and integral_of_surface_downwelling_shortwave_flux_in_air are derived through a post-processing of the 2.5 km raw model output. I am not the author of the procedure but it should be a nearest neighbour (or similar). MEPS Arome Arctic is a different story and it is not related to MET Nordic methods.