use sfc_diag to diagnose 2m t/q inside NoahMP

HelinWei-NOAA / ccpp-physics

GFS physics for CCPP

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use sfc_diag to diagnose 2m t/q inside NoahMP #43

Open HelinWei-NOAA opened 2 years ago

HelinWei-NOAA commented 2 years ago

p8c uses the latest update code of NoahMP. So the 2-meter temperature and humidity over land are derived from NoahMP two-tile values instead of using sfc_diag. The diurnal variability becomes too large (too warm daytime and too cold night time) from this change. Now we would like to test using sfc_diag approach to calculate 2-meter temperature and humidity inside NoahMP.

HelinWei-NOAA commented 2 years ago

The test with this proposed change is running. I have rerun p8c 5-day forecasts (P8F) with the old way to calculate 2m T/Q. The difference can be see here

wzzheng90 commented 2 years ago

It looks that t2m is interpolated from tv and sfctmp? Is it done over vegetated part and bare part separately?