Phase dispersion relation of the 5-micron hot spot wave from a long-term study of Jupiter in the visible

Details Phase dispersion relation of the 5-micron hot spot wave from a long-term study of Jupiter in the visible Phase dispersion relation of the 5-micron hot spot wave from a long-term study of Jupiter in the visible

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006jgre..11109010a&link_type=abstract

Journal of Geophysical Research, Volume 111, Issue E9, CiteID E09010

Physics

5

Planetary Sciences: Fluid Planets: General Or Miscellaneous, Planetary Sciences: Fluid Planets: Atmospheres (0343, 1060), Planetary Sciences: Fluid Planets: Meteorology (3346), Planetary Sciences: Solar System Objects: Jupiter

Scientific paper

We present a long-term study at visible wavelengths of the motions and spatial distribution of the hot spots at 7°N of Jupiter. This research involves seven years of observations of the planet between 1979 and 2002 and includes data from Voyagers 1 and 2, Hubble Space Telescope, and a number of ground-based observatories. Our analysis of the North Equatorial Belt (NEB) dark projections (DPs) velocities and wave numbers shows that a dispersion relationship exists, with the DPs velocity (ranging from 97 to 113 m s-1) slightly increasing with wave number (ranging from 6 to 20, although usually 8-12). We interpret this relationship in terms of a superposition of equatorial Rossby waves traveling along the planet and confined to the upper troposphere. The resulting equivalent depth for the waves on an incompressible fluid is 1-2 km, and they move relative to a background flow with speed 140 m s-1, a result in good agreement with previous analysis of the wave interpretation for hot spot motions as observed in the infrared.

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