On the forcing of inertia-gravity by synoptic-scale flows

Riwal Plougonven, Fuqing Zhang

Research output: Contribution to journalArticle

27 Scopus citations

Abstract

Studies on the spontaneous emission of gravity waves from jets, both observational and numerical, have emphasized that excitation of gravity waves occurred preferentially near regions of imbalance. Yet a quantitative relation between the several large-scale diagnostics of imbalance and the excited waves is still lacking. The purpose of the present note is to investigate one possible way to relate quantitatively the gravity waves to diagnostics of the large-scale flow that is exciting them. Scaling arguments are used to determine how the large-scale flow may provide a forcing on the right-hand side of a wave equation describing the linear dynamics of the excited waves. The residual of the nonlinear balance equation plays an important role in this forcing.

Original languageEnglish (US)
Pages (from-to)1737-1742
Number of pages6
JournalJournal of the Atmospheric Sciences
Volume64
Issue number5
DOIs
StatePublished - May 2007

All Science Journal Classification (ASJC) codes

  • Atmospheric Science

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