Dynamo region and the equatorial electrojet in the Jovian atmosphere

Details Dynamo region and the equatorial electrojet in the Jovian atmosphere Dynamo region and the equatorial electrojet in the Jovian atmosphere

Jun 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983p%26ss...31..633r&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 31, June 1983, p. 633-640. Research supported by the Department of Space and

Astronomy and Astrophysics

Astronomy

1

Atmospheric Models, Dynamo Theory, Equatorial Electrojet, Jupiter Atmosphere, Altitude, Astronomical Models, Atmospheric Pressure, Current Density, Electric Fields, Planetary Ionospheres, Jupiter, Dynamo, Equatorial Regions, Atmsophere, Altitude, Pressure, Physical Properties, Features, Ionosphere, Models, Current, Density, Latitude, Thickness, Electrons, Velocity, Procedure

Scientific paper

The existence of the dynamo region is identified in the atmosphere of Jupiter. It is found that the dynamo region extends from an altitude of 130 km (0.153 mbar) to 330 km (0.027 microbar) reckoned from zero altitude corresponding to 43.8 mbar pressure level. Physical features of the equatorial electrojet in the ionosphere of Jupiter are modelled in detail. The Jovian equatorial electrojet has a maximum eastward current density of about 1.5 A/sq km at an altitude of 270 km (0.33 microbar) with a latitudinal half width of about + or - 11 degrees. The thickness of the equatorial half width is 100 km in altitude range. The type I instability in the electrojet can exist only if the electron streaming velocity exceeds the value of about 250 m/s.

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