A Comparative Study of Jovian Cyclonic Features from a Six-Year (1994-2000) Survey

Details A Comparative Study of Jovian Cyclonic Features from a Six-Year (1994-2000) Survey A Comparative Study of Jovian Cyclonic Features from a Six-Year (1994-2000) Survey

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002icar..160..325m&link_type=abstract

Icarus, Volume 160, Issue 2, p. 325-335.

Computer Science

10

Scientific paper

This work presents a six-year study aimed at characterizing the morphology and properties of the atmospheric features present in jovian cyclonic regions. It complements our previous analysis for the same period on the anticyclonic vortices (Morales-Juberias et al. 2002, Icarus 157, 76-90). The main difference between cyclonic and anticyclonic regions in Jupiter is that a variety of organized morphologies are present in the cyclonic areas, although they can be grouped consistently into five different types: filamentary turbulence related to the highest speed jets, organized folded filamentary regions, elongated areas with contours closed by a ribbon-like feature, discrete, closed brown cyclones (``barges''), and peculiar transient structures such as short wave trains and cyclonic cells. We present data on their color contrast, size, aspect ratio, distribution, lifetimes, relation to the jet system and to the anticyclones, and motions (global and internal to the features). Most cyclonic features show a rapid evolution, compared to the anticyclones, and tend to be dispersed zonally although some survive for a few years. We used the barges that are the most representative, long-lived, and extended type of cyclonic features to show that there exists a linear relationship between their relative velocity and the mean zonal flow speed, similar to that found in our previous work on the anticyclones. There is also some evidence that the drift rate of barges is related to the planetary minus flow vorticity gradient.

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