A wave dynamical interpretation of Saturn's polar hexagon

Details A wave dynamical interpretation of Saturn's polar hexagon A wave dynamical interpretation of Saturn's polar hexagon

Mar 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990sci...247.1061a&link_type=abstract

Science (ISSN 0036-8075), vol. 247, March 2, 1990, p. 1061-1063.

Computer Science

33

Planetary Waves, Polar Regions, Saturn Atmosphere, Voyager 2 Spacecraft, Clouds, Stream Functions (Fluids), Wave Functions, Saturn, Dynamics, Waves, Polar Regions, Clouds, Features, Atmosphere, Spacecraft Observations, Voyager Missions, Jets, Perturbations, Models, Trapping, Stratification, Photographs, Calculations, Patterns, Flow, Velocity, Motion, Comparisons

Scientific paper

The hexagonal, pole-centered cloud feature in Saturn's northern atmosphere, as revealed in Voyager close-encounter imaging mosaics, may be interpreted as a stationary Rossby wave. The wave is embedded within a sharply peaked eastward jet (of 100 meters per second) and appears to be perturbed by at least one anticyclonic oval vortex immediately to the south. The effectively exact observational determination of the horizontal wave number and phase speed, applied to a simple model dispersion relation, suggests that the wave is vertically trapped and provides a diagnostic template for further modeling of the deep atmospheric stratification.

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