NSF Org:	AGS Division of Atmospheric and Geospace Sciences
Recipient:	UNIVERSITY OF CALIFORNIA SAN DIEGO
Initial Amendment Date:	January 10, 2000
Latest Amendment Date:	November 26, 2001
Award Number:	9911249
Award Instrument:	Continuing Grant
Program Manager:	Lydia Gates AGS  Division of Atmospheric and Geospace Sciences GEO  Directorate for Geosciences
Start Date:	January 1, 2000
End Date:	December 31, 2003 (Estimated)
Total Intended Award Amount:	$234,854.00
Total Awarded Amount to Date:	$234,854.00
Funds Obligated to Date:	FY 2000 = $75,115.00 FY 2001 = $78,003.00 FY 2002 = $81,736.00
History of Investigator:	Guang Zhang (Principal Investigator) gzhang@ucsd.edu
Recipient Sponsored Research Office:	University of California-San Diego Scripps Inst of Oceanography 8622 DISCOVERY WAY # 116 LA JOLLA CA  US  92093-1500 (858)534-1293
Sponsor Congressional District:	50
Primary Place of Performance:	University of California-San Diego Scripps Inst of Oceanography 8622 DISCOVERY WAY # 116 LA JOLLA CA  US  92093-1500
Primary Place of Performance Congressional District:	50
Unique Entity Identifier (UEI):	QJ8HMDK7MRM3
Parent UEI:	QJ8HMDK7MRM3
NSF Program(s):	LARGE-SCALE DYNAMIC METEOROLOG
Primary Program Source:	app-0100  app-0101  app-0102
Program Reference Code(s):	0000, OTHR
Program Element Code(s):	152700
Award Agency Code:	4900
Fund Agency Code:	4900
Assistance Listing Number(s):	47.050

ABSTRACT

The vertical transport of momentum by cumulus convection is very important in maintaining the large-scale atmospheric circulation, but the process is not adequately represented in general circulation models of the atmosphere. The development of parameterizations of convective momentum transport is extremely important to the advancement of climate and numerical weather prediction in general.
Dr. Zhang will investigate fundamental issues related to convective momentum transport and the development of a convective momentum parameterization scheme. Specifically he will examine the role of the convection-induced pressure gradient force across clouds in vertical momentum transport. He will employ two- and three-dimensional cloud resolving models and a single column model as well as observations from both a tropical maritime environment and a midlatitude continental environment. The cloud resolving model results will be used to understand the role of the pressure gradient forces and then refine the parameterization. Several parameterizations will then be tested through simulations with a single column model. Ultimately the results should improve our understanding of the effect of convective momentum transport on the large-scale circulation of the atmosphere.

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