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High-resolution simulations of freely decaying shallow-water turbulence on a rotating sphere

TitoloHigh-resolution simulations of freely decaying shallow-water turbulence on a rotating sphere
Tipo di pubblicazioneArticolo su Rivista peer-reviewed
Anno di Pubblicazione1999
AutoriIacono, Roberto, Struglia Maria Vittoria, Ronchi C., and Nicastro S.
RivistaNuovo Cimento della Societa Italiana di Fisica C
Volume22
Paginazione813-821
Type of ArticleArticle
ISSN03905551
Abstract

Results of high-resolution, long-time numerical integrations of the unforced shallow-water equations on a rotating sphere are presented. A new accurate and efficient grid point method is used for these simulations, that allows to easily reach very high spatial resolutions (up to an equivalent T680 spectral truncation). It is found that, for small values of the Rossby deformation radius LD, the final quasi-steady states of the free evolution are characterized by the formation of robust westward (retrograde) equatorial jets, whose strengths and widths depend on LD and on the rotation speed. It is also shown that the presence of a westward equatorial jet is related to the global prevalence of anticyclonic vorticity.

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URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-2242445210&partnerID=40&md5=a60fe6ea572b1d496be34c3c98f0c07b
Citation KeyIacono1999813