Simulation of atmospheric frontogenesis with a semi-Lagrangian numerical model
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Authors
Almeida, Ricardo Carvalho de
Subjects
Meteorology
Numerical weather prediction
Semi-Lagrangian
Frontogenesis
Numerical weather prediction
Semi-Lagrangian
Frontogenesis
Advisors
Williams, Roger Terry
Date of Issue
1991-09
Date
September 1991
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
In this study a numerical model based on the hydrostatic Boussinesq equations is used to simulate atmospheric frontogenesis driven by an irrotational non-divergent deformation wind field. The equations are numerically integrated by using the semi-Lagrangian technique associated with two different time schemes: explicit and semi-implicit. Both schemes produce realistic fronts after approximately 40 hours of model integration. The semi-Lagrangian semi-implicit scheme is more successful in handling the sharp gradients associated with the front. Also, the semi-Lagrangian semi-implicit equation are integrated with time steps as long as 3600 sec. producing solutions with relatively small errors. This indicates that this numerical scheme is appropriate for use in mesoscale regional models.
Type
Thesis
Description
Series/Report No
Department
Meteorology
Organization
Naval Postgraduate School
Identifiers
NPS Report Number
Sponsors
Funder
Format
63 p.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
Copyright is reserved by the copyright owner