Performance of Hybrid Eulerian-Lagrangian Semi-Implicit time integrators for nonhydrostatic mesoscale atmospheric modeling
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Authors
De Luca, Thomas J.
Subjects
Advisors
Giraldo, Francis X.
Stone, Rebecca E.
Date of Issue
2007-09
Date
Publisher
Monterey, California. Naval Postgraduate School
Language
Abstract
In this thesis, the performance and accuracy of explicit, semiimplicit, and Hybrid EulerianLagrangian SemiImplicit (HELSI) timeintegration methods used in atmospheric modeling are examined. Four test cases are analyzed: A density current, an inertial gravity wave, a rising thermal bubble, and a hydrostatic mountain wave. Strict attention is paid to computational time, stability criteria, and accuracy. The project aims to show increased efficiency using the HELSI method over fully semiimplicit methods, which, in turn, should be better than the splitexplicit methods currently used in mesoscale models such as WRF, COAMPS, and the German LM model. This increase in efficiency allows for valuable computational resources to be used for other purposes, such as improved data assimilation, increased spatial resolution, or more detailed physics.
Type
Thesis
Description
Series/Report No
Department
Meteorology
Applied Mathematics
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
xiv, 57 p.: ill., (some col.)
Citation
Distribution Statement
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.