2.5 Comparison of Microphysics Schemes in FV3GFS

Monday, 8 January 2018: 11:30 AM
Room 14 (ACC) (Austin, Texas)
Ruiyu Sun, NOAA/NWS/NCEP/EMC and IMSG, College Park, MD; and A. Chen, F. Yang, S. Moorthi, and V. Tallapragada

Zhao and Carr microphysics scheme as implemented in the NCEP Global Forecasting System (GFS) is a simple scheme and predicts only total cloud condensate. Many microphysical processes, especially the processes related to ice, are simplified or neglected. Precipitation is diagnosed and falls to the surface instantaneously. The scheme has been identified as the source of issues related to the modeled precipitation and cloud radiative effects. Several microphysics schemes have been recommended as candidates to replace Zhao and Carr in the next generation global prediction system (NGGPS). In this study we will show some preliminary results of each scheme in the FV3GFS based on the forecast experiments. Comparisons among the scheme will be made in terms of the precipitation skills and cloud properties and their radiative effects.
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