Computer Science – Numerical Analysis
Scientific paper
Oct 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986joat.conf..144h&link_type=abstract
In NASA. Goddard Inst. for Space Studies The Jovian Atmospheres p 144-155 (SEE N87-17598 09-91)
Computer Science
Numerical Analysis
Atmospheric Circulation, Convective Flow, Jet Streams (Meteorology), Meridional Flow, Planetary Atmospheres, Forced Convection, Jupiter (Planet), Numerical Analysis, Polar Regions, Saturn (Planet), Simulation
Scientific paper
Examples of convection in rotating layers are presented to illustrate how convection can drive global circulations on the Jovian planets. For rapid rotation the convective motions become largely two-dimensional and produce Reynold stresses which drive large scale flows. The initial tendency is to produce a prograde equatorial jet and a meridional circulation which is directed toward the poles in the surface layers. Fully nonlinear numerical simulations for the slowly rotating solar convection zone show that the meridional circulation does not reach the poles. Instead a multicellular meridional circulation is produced which has a downward flowing branch in the mid-latitudes. For more rapidly rotating objects such as Jupiter and Saturn this meridional circulation may consist of a larger number of cells. Axisymmetric convective models then show that prograde jets form at the downflow latitudes. A nonlinear numerical simulation of convection in a prograde jet is presented to illustrate the interactions which occur between convection and these jets. Without rotation the convection removes energy and momentum from the jet. With rotation the convection feeds energy and momentum into the jet.
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