Frontal equilibration by frictional processes

Richard D. Twigg, Peter R. Bannon

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

The effect of friction on frontogenesis driven by a stretching deformation field is studied analytically in both a quasigeostrophic and a semigeostrophic framework for a semi-infinite, adiabatic, Boussinesq fluid on an f plane. Friction is incorporated into the model in terms of a boundary layer pumping term. The solutions demonstrate that the effect of friction is frontolytic. The quasigeostrophic fronts always equilibrate at a finite horizontal scale. The semigeostrophic fronts equilibrate at a finite horizontal scale if the strength of the frontogenesis is below a threshold value. Above this threshold, the front is predicted to collapse to a discontinuity in its thermal and momentum fields.

Original languageEnglish (US)
Pages (from-to)1084-1087
Number of pages4
JournalJournal of the Atmospheric Sciences
Volume55
Issue number6
DOIs
StatePublished - Mar 15 1998

All Science Journal Classification (ASJC) codes

  • Atmospheric Science

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