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Vertical normal modes of a mesoscale model using a scaled height coordinateVertical modes were derived for a version of the Colorado State Regional Atmospheric Mesoscale Modeling System. The impacts of three options for dealing with the upper boundary of the model were studied. The standard model formulation holds pressure constant at a fixed altitude near the model top, and produces a fastest mode with a speed of about 90 m/sec. An alternative formulation, which allows for an external mode, could require recomputation of vertical modes for every surface elevation on the horizontal grid unless the modes are derived in a particular way. These results have bearing on the feasibility of applying vertical mode initialization to models with scaled height coordinates.
Document ID
19870027224
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Lipton, A. E.
(Colorado State Univ. Fort Collins, CO, United States)
Pielke, R. A.
(Colorado State University Fort Collins, United States)
Date Acquired
August 13, 2013
Publication Date
August 1, 1986
Publication Information
Publication: Journal of the Atmospheric Sciences
Volume: 43
ISSN: 0022-4928
Subject Category
Meteorology And Climatology
Accession Number
87A14498
Funding Number(s)
CONTRACT_GRANT: NSF ATM-84-14181
CONTRACT_GRANT: NAG5-359
Distribution Limits
Public
Copyright
Other

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