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Cloud-Resolving Model Simulations of LBA Convective Systems: Easterly and Westerly RegimesThe 3D Goddard Cumulus Ensemble (GCE) model was used to simulate convection that occurred during the TRMM LBA field experiment in Brazil. Convection in this region can be categorized into two different regimes. Low-level easterly flow results in moderate to high CAPE and a drier environment. Convection is more intense like that seen over continents. Low-level westerly flow results in low CAPE and a moist environment. Convection is weaker and more widespread characteristic of oceanic or monsoon-like systems. The GCE model has been used to study both regimes in order to provide cloud data sets that are representative of both environments in support of TRMM rainfall and heating algorithm development. Two different case are presented: Jan 26,1999, an easterly regime case, and Feb 23,1999, a westerly regime case. The Jan 26 case is an organized squall line and is initialized with a standard cold pool. The sensitivity to mid-level sounding moisture and wind shear will also be shown. The Feb 23 case is less-organized with only transient lines and is initialized with either warm bubbles or prescribed surface fluxes. Heating profiles, rainfall statistics and storm characteristics are compared and validated for the two cases against observations collected during the experiment.
Document ID
20030054385
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Lang, Stephen E.
(Science Systems and Applications, Inc. Greenbelt, MD, United States)
Tao, Wei-Kuo
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 2002
Subject Category
Meteorology And Climatology
Meeting Information
Meeting: International TRMM Science Conference
Location: Honolulu, HI
Country: United States
Start Date: July 22, 2002
End Date: July 26, 2002
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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