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Formulation of an explicit-multiple-time-step time integration method for use in a global primitive equation grid modelWith appropriate modifications, a recently proposed explicit-multiple-time-step scheme (EMTSS) is incorporated into the UCLA model. In this scheme, the linearized terms in the governing equations that generate the gravity waves are split into different vertical modes. Each mode is integrated with an optimal time step, and at periodic intervals these modes are recombined. The other terms are integrated with a time step dictated by the CFL condition for low-frequency waves. This large time step requires a special modification of the advective terms in the polar region to maintain stability. Test runs for 72 h show that EMTSS is a stable, efficient and accurate scheme.
Document ID
19830037246
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Chao, W. C.
(NASA Goddard Space Flight Center Laboratory for Planetary Atmospheres, Greenbelt, MD; Science Applications, Inc., McLean, VA, United States)
Date Acquired
August 11, 2013
Publication Date
November 1, 1982
Publication Information
Publication: Monthly Weather Review
Volume: 110
Subject Category
Meteorology And Climatology
Accession Number
83A18464
Funding Number(s)
CONTRACT_GRANT: N00014-81-C-2085
CONTRACT_GRANT: N00173-80-C-0101
Distribution Limits
Public
Copyright
Other

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