Diagnostic verification of the GLAS general circulation model as applied to a case of extratropical maritime explosive cyclogenesis.

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Authors
Ebersole, Kenneth A.
Subjects
GLAS Model Verification
Quasi Lagrangian Diagnostics
Explosive Maritime Cyclogenesis
FGGE Year
Mass Budget Analysis
Vorticity Budget Analysis
SAT/NOSAT Comparisons
Advisors
Wash, Carlyle H.
Date of Issue
1984
Date
December 1984
Publisher
Language
en_US
Abstract
The general circulation model from the Goddard Laboratory for Atmospheric Sciences (GLAS) is verified for a case of explosive extratropical cyclogenesis in the North Pacific. Model runs are initialized with GLAS analyses based on the First GARP Global Experiment (FGGE) Level Ill-b data. Mass and vorticity budget studies are performed on two separate sets of forecasts. One set (SAT) was initialized with all available FGGE data, while the other (NOSAT) was initialized with all FGGE data except satellite data. Explosive development occurs in conjunction with zonal mid-level flow and strong jet streak interaction. The inclusion of underestimated satellite winds in the SAT initial field weakened the intensity of the jet stream and adversely affected the forecasts. The NOSAT run indicated greater surface convergence, divergence aloft, vertical motion and PVA than the SAT run. The NOSAT prognoses developed and positioned the storm more accurately than the SAT prognoses.
Type
Thesis
Description
Series/Report No
Department
Organization
Naval Postgraduate school
Identifiers
NPS Report Number
Sponsors
Funder
Format
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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