Nonlinear equilibration of two-dimensional Eady waves: a new perspective

S. T. Garner, N. Nakamura, I. M. Held

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

To avoid subgrid turbulence parameterizations and computational diffusion, the analogy is developed using Eady's generalized baroclinic instability problem. Eady's generalized model has two semi-infinite regions of large PV surrounding a layer of relatively small PV. Without boundaries, frontal collapse, or strong diffusion the model still produces equilibrated states, with structure similar to the vortex streets that emerge from unstable barotropic shear layers. The similarity is greatest when the baroclinic development is viewed in isentropic coordinates. The contrast between the present equilibrated solutions, which exhibit no vertical tilt, and Blumen's diffusive frontogenesis model, which allows the wave to retain its phase tilt, is briefly discussed. -Authors

Original languageEnglish (US)
Pages (from-to)1984-1996
Number of pages13
JournalJournal of the Atmospheric Sciences
Volume49
Issue number21
DOIs
StatePublished - 1992

All Science Journal Classification (ASJC) codes

  • Atmospheric Science

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