Updates in the NCEP GFS Cumulus Convection, Vertical Turbulent Mixing, and Surface Layer Physics

Han, Jongil; Li, Wei; Yang, Fanglin; Strobach, Edward; Zheng, Weizhong; Sun, Ruiyu

doi:10.25923/cybh-w893

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Updates in the NCEP GFS Cumulus Convection, Vertical Turbulent Mixing, and Surface Layer Physics

2021
By Han, Jongil ; Li, Wei ; Yang, Fanglin ; ...
Series: Office note (National Centers for Environmental Prediction (U.S.)) ; 505

[PDF-2.09 MB]

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Han, Jongil ; Li, Wei ; Yang, Fanglin ; Strobach, Edward ; Zheng, Weizhong ; ... More +

Han, Jongil ; Li, Wei ; Yang, Fanglin ; Strobach, Edward ; Zheng, Weizhong ; Sun, Ruiyu Less -
Corporate Authors:

National Centers for Environmental Prediction (U.S.)
NOAA Program & Office:

NWS (National Weather Service) ; NCEP (National Centers for Environmental Prediction)

NWS (National Weather Service) ; NCEP (National Centers for Environmental Prediction) Less -
Description:

Significant model physics updates to cumulus convection, vertical turbulent mixing and surface layer physics were made, all of which represent candidate changes for the next version of the NCEP GFS. The updates aim mainly to enhance the underestimated surface-based convective available potential energy, to reduce the tropospheric cold temperature biases and the planetary boundary layer (PBL) dry moisture biases over the Tropics, to reduce the excessive vertical turbulence mixing in strong shear environment as well as the excessive PBL growth, to better predict the surface inversion as well as the capping inversion near the PBL top, to reduce the nighttime cold and daytime warm 2m temperature biases over forested regions, and to better represent sub-grid scale turbulence variability in the surface layer.
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Atmospheric Models Boundary Layer (Meteorology) Numerical Weather Forecasting
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Office note (National Centers for Environmental Prediction (U.S.)) ; 505
DOI:

https://doi.org/10.25923/cybh-w893
Document Type:

Office Note
Place as Subject:

United States
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Public Domain
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Submitted
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urn:sha256:f89dd31a1741192fafe43ca61ce80e9862dd895a78791f376b50346525df7707
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https://repository.library.noaa.gov/view/noaa/33881/noaa_33881_DS1.pdf
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Updates in the NCEP GFS Cumulus Convection, Vertical Turbulent Mixing, and Surface Layer Physics

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