Spectral viscosity for shallow water equations in spherical geometry

A. Gelb, J. P. Gleeson

Research output: Contribution to journalArticle

21 Scopus citations

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
DOIs
StatePublished - Jan 1 2001

ASJC Scopus subject areas

  • Atmospheric Science

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