Spectral viscosity for shallow water equations in spherical geometry

Anne Gelb, J. P. Gleeson

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

A spherical spectral viscosity operator is proposed as an alternative to standard horizontal diffusion terms in global atmospheric models. Implementation in NCAR's Spectral Transform Shallow Water Model and application to a suite of standard test cases demonstrates improvement in resolution and numerical conservation of invariants at no extra computational cost. The retention in the spectral viscosity solution of high-wavenumber information allows the successful application of high-resolution postprocessing methods.

Original languageEnglish (US)
Pages (from-to)2346-2360
Number of pages15
JournalMonthly Weather Review
Volume129
Issue number9
StatePublished - Sep 2001
Externally publishedYes

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shallow-water equation
viscosity
geometry
shallow water
transform
cost
atmospheric model
method
test

ASJC Scopus subject areas

  • Atmospheric Science

Cite this

Spectral viscosity for shallow water equations in spherical geometry. / Gelb, Anne; Gleeson, J. P.

In: Monthly Weather Review, Vol. 129, No. 9, 09.2001, p. 2346-2360.

Research output: Contribution to journalArticle

Gelb, A & Gleeson, JP 2001, 'Spectral viscosity for shallow water equations in spherical geometry', Monthly Weather Review, vol. 129, no. 9, pp. 2346-2360.
Gelb, Anne ; Gleeson, J. P. / Spectral viscosity for shallow water equations in spherical geometry. In: Monthly Weather Review. 2001 ; Vol. 129, No. 9. pp. 2346-2360.
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