Physics – Fluid Dynamics
Scientific paper
Nov 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aps..dfd..jc06c&link_type=abstract
American Physical Society, Division of Fluid Dynamics Meeting, November 22-24, 1998 Philadelphia, PA, abstract #JC.06
Physics
Fluid Dynamics
Scientific paper
The motion in and around the Great Red Spot (GRS) is tremendously complex, involving a huge range of spatial scales. In the past, many numerical simulation studies have been carried out aimed at addressing the possible origin and general stability of the GRS. However, past studies have neither been able to capture the detail flow nor adequately constrain the vertical stratification (represented by the Rossby deformation radius, L_R) due to the severe limitation in numerical resolution. In this work, we present results from high-resolution simulations using an essentially inviscid algorithm based on the advection of deformable patches of dynamically active tracer, potential vorticity (PV). The algorithm solves 3-D quasi-geostrophic PV equation, which governs the motion of large-scale, slowly-varying, shallow structures in planetary atmospheres. In order to carefully delineate the effects of stratification on the nonlinear evolution of the GRS, we vary the vertical profile of LR to correspond to several representative temperature profiles in the Jovian atmosphere. Our simulations show that, at high resolutions, this simple model (diabatic effects are not included) is able to capture very well the flow features seen in Voyager and Galileo images.
Cho James Y-K.
de la Torre Juarez Manuel
Ingersoll P. A. P. A.
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