Improvements to the Staniforth-Mitchell barotropic numerical weather prediction code
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Authors
Newton, R. E. (Robert Eugene)
Subjects
Finite element
numerical weather prediction
generalized eigenvalue problem
Helmholtz equation
numerical weather prediction
generalized eigenvalue problem
Helmholtz equation
Advisors
Date of Issue
1986-10
Date
1986-10
Publisher
Monterey, California. Naval Postgraduate School
Language
Abstract
Improvements to the Staniforth-Mitchell barotropic numerical weather prediction code are
proposed. Three separate contributions are described: (1) a direct solution of the Helmholtz
equation is offered as a substitute for the iterative scheme currently employed;
(2) a new algorithm is developed to solve the generalized eigenvalue problem for symmetric
tridiagonal matrices; (3) the latter algorithm is extended to deal with a periodic boundary
condition. It is estimated that a direct solution of the Helmholtz equation, for a
13 x 13 grid, will effect a computation time saving per time step of at least 10 percent.
FORTRAN 77 listings of the subroutines needed to implement the proposed improvements are
included.
Type
Technical Report
Description
Interim Report for Period June 1986 - September 1986
Series/Report No
Department
Organization
Identifiers
NPS Report Number
NPS69-35-Q08
Sponsors
supported by the Naval Environmental
Prediction Research Facility
Funding
Format
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.