Physics
Scientific paper
Jun 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jpsj...52.1930h&link_type=abstract
Physical Society of Japan, Journal (ISSN 0031-9015), vol. 52, June 1983, p. 1930-1934.
Physics
11
Jupiter Atmosphere, Saturn Atmosphere, Wind (Meteorology), Flow Distribution, Meridional Flow, Scale Height, Voyager 1 Spacecraft, Voyager 2 Spacecraft
Scientific paper
Voyager spacecraft data of the Jovian and Saturnian wind systems are examined analytically in comparison with theoretical predictions for the formation of organized structures when spectrum condensation of turbulence occurs. The two-dimensional analysis assumes a constant beta, a homogeneous excitation level of the relative scale height, and a normalization of the spatial coordinate of the Rossby radius. Calculations are presented of the width of the zonal flows and the wind speeds. The results are compared with the Voyager observations, showing good agreement for a wind pattern that is periodic in the N-S direction. It is concluded that the spectral condensation is caused by the combination of the inverse cascade in the wave number regime, with mode couplings happening at a rate much faster than the Rossby frequency. The vorticity field continuously dissipates, leaving the ordered structures, which are not destroyed by kinematic disturbances.
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