1)Add changes of total cloud fraction for FV3 GFS; 2)Tweak DBZI.#142
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yangfanglin
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The changes look good. Since GFS predicts fractional cloudiness, it makes more since to directly use the model output instead of computing in the POST using a method that was designed for models with binary cloud covers.
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Wen,
Once the post.a lib is updated on WCOSS, ORION, and HERA, I will update
the feature/gfsv16b workflow to use this new post tag.
Fanglin
…On Fri, Jun 19, 2020 at 11:11 AM WenMeng-NOAA ***@***.***> wrote:
Merged #142 <#142> into
release/gfs_v16.
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Fanglin Yang, Ph.D.
Physical Scientist
Environmental Modeling Center
National Centers for Environmental Prediction
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To keep a record .... Brad Ferrier developed a scheme to compute instantaneous Low/Mid/High cloud fractions in the POST for NAM. Because NAM only has binary cloud fraction (1 vs 0) at each model grid, he used the average over a few model grids over a 14 by 14-km box to compute "fractional" cloud covers. Wen applied this method to compute instantaneous L/M/H clouds for GFS.v16. It worked in the offline post; however, it caused the model to hang in the inline post. After long hours of debugging, Wen found an MPI gathering call in this section of code caused the model to hang. The computation needs points to cross the boundaries within each MPI task. Unlike NAM, GFS produces true fractional clouds. We decided to not use the complicated "NAM" approach, and instead directly use GFS predicted 3-D cloud fractions to derive instantaneous L/M/H clouds in the post. This "NAM" approach is nevertheless ad hoc in nature since the corresponding L/M/H cloud-base pressures used in the post are point values instead of area averages. ( PCLDBASE=PMID(I,J,L) !-- Using PCLDBASE variable for convenience). |
Feature/fixgsm filenames
…C#142) track UPP control and params(params_grib2_tbl_new) files RTMA-related updates (sync rtma with latest RRFS_dev1, update convinfo.rtma, etc) check the existence of ${FFG_DIR}/latest.FFG before continuing
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The main changes:
1)Add changes of total cloud fraction for FV3 GFS;
2)Tweak DBZI.