Flow fields within Jupiter's Great Red SPOT and White Oval BC

Details Flow fields within Jupiter's Great Red SPOT and White Oval BC Flow fields within Jupiter's Great Red SPOT and White Oval BC

Sep 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jgr....86.8751m&link_type=abstract

Journal of Geophysical Research, vol. 86, Sept. 30, 1981, p. 8751-8757. NASA-supported research.

Physics

63

Atmospheric Circulation, Flow Distribution, Jupiter Atmosphere, Jupiter Red Spot, Planetary Mapping, Geostrophic Wind, High Resolution, Planetary Waves, Rossby Regimes, Vorticity, Voyager Project, Wind Velocity, Jupiter, Great Red Spot, Flow, White Oval Bc, Voyager 1, Rossby Number, Vortex, Velocity, Winds, Features, Latitudes, Photographs, Eddy Effects, Circulation, Comparisons, Data, Imagery

Scientific paper

Voyager 1 high-resolution images of Jupiter's Great Red Spot (GRS) and White Oval BC are used to map flow fields within these two areas. The relative vorticity is computed as a function of semi-major axis length and position angle in a coordinate system consisting of concentric ellipses of equal eccentricity. Wind speeds of 110-120 m/s are observed near the outer edge of both features, and along their minor axes relative vorticity profiles reach a maximum of 0.00006/s. Maximum Rossby numbers of 0.36 are computed for flows within both features, and are found to be low, indicating geostrophic constraints on the flow. The difference in streamline curvature within the GRS and the Oval BC is found to compensate for the difference in planetary vorticity at the respective latitudes of the features. Finally, motions within the central region of the GRS are slower and more random than around the spot's outer portion.

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