Geostrophic winds with a full representation of the Coriolis force: Application to IR observations of the Upper Jovian Troposphere.

Details Geostrophic winds with a full representation of the Coriolis force: Application to IR observations of the Upper Jovian Troposphere. Geostrophic winds with a full representation of the Coriolis force: Application to IR observations of the Upper Jovian Troposphere.

Nov 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aps..dfd.dn004d&link_type=abstract

American Physical Society, 53rd Annual Meeting of the Division of Fluid Dynamics November 19 - 21, 2000 Washington, DC Meeting I

Physics

Fluid Dynamics

Scientific paper

The diagnostics of large scale geostrophy in a stratified atmosphere are revisited using a full Coriolis force and compared with diagnostics based on the primitive equations. The formulation of geostrophy with a full Coriolis force includes the horizontal and vertical projections of the planetary rotation vector, is not singular at the equator, and provides partial information about vertical transport. We gauge the accuracy of the standard hydrostatic approximation in the presence of geostrophic motion, and an alternative is discussed. The combination of the hydrostatic approximation with geostrophy with a full Coriolis force predicts much smaller wind shears than previously diagnosed for Jupiter. We use a set of global temperature maps observed at four pressure levels, between 100 and 400 mbar, in the upper Jovian troposphere, that were obtained from mid-infrared observations made in June, 1996. Maps of the large-scale thermal shears show higher concentration of longitudinal structures and vertical transport along two particular zonal bands at latitudes near 15 degrees N and 15 degrees S.

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