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Simulated Radar Characteristics 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 n order to provide cloud datasets that are representative of both environments in support of TRMM rainfall and heating algorithm development. Two different cases are analyzed: Jan 26, 1999, an eastely regime case, and Feb 23, 1999, a westerly regime case. The Jan 26 case is an organized squall line, while the Feb 23 case is less organized with only transient lines. Radar signatures, including CFADs, from the two simulated cases are compared to each other and with observations. The microphysical processes simulated in the model are also compared between the two cases.
Document ID
20030053074
Acquisition Source
Goddard Space Flight Center
Document Type
Preprint (Draft being sent to journal)
Authors
Lang, Stephen E.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Tao, Wei-Kuo
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Simpson, Joanne
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 2003
Subject Category
Meteorology And Climatology
Meeting Information
Meeting: 31st International Conference on Radar Meteorology
Location: Seattle, WA
Country: United States
Start Date: August 6, 2003
End Date: August 12, 2003
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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