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Geostrophic adjustment in a baroclinic atmosphere (1990)

Duffy, Dean G.

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Publication Date: 2011-08-19

Description: The classical geostrophic adjustment problem is reexamined in a baroclinically unstable atmosphere. After the geostrophic balance is disturbed by either adding mass or momentum to the atmosphere, the resulting evolution of the mass and momentum fields is found by using Laplace and Fourier transforms. In general, the results from classical geostrophic theory hold in the baroclinically unstable atmosphere. Although the most unstable modes eventually dominate, in certain situations the perturbations may actually decay before they begin to grow. This may be a key mechanism which explains a portion of the spinup problem commonly encountered in numerical models.

Keywords: METEOROLOGY AND CLIMATOLOGY

Type: Journal of the Atmospheric Sciences (ISSN 0022-4928); 47; 457-473

Format: text

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