Jupiter's polar ionospheric flows: Theoretical interpretation

Details Jupiter's polar ionospheric flows: Theoretical interpretation Jupiter's polar ionospheric flows: Theoretical interpretation

Mar 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30e..24c&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 5, pp. 24-1, CiteID 1220, DOI 10.1029/2002GL016030

Physics

26

Magnetospheric Physics: Solar Wind/Magnetosphere Interactions, Magnetospheric Physics: Auroral Phenomena (2407), Magnetospheric Physics: Magnetosphere/Ionosphere Interactions

Scientific paper

Prompted by recent observations of ion flows from Doppler measurements of infrared auroras, we here discuss the nature of the plasma flow in Jupiter's high-latitude ionosphere. The physical picture is based on a combination of three elements, namely an inner Hill-type sub-corotating region containing outward-diffusing iogenic plasma, an outer sub-corotating region where iogenic plasma is lost down the tail, principally in the dusk and midnight sector via the reconnection-related Vasyliunas-cycle, and finally an outermost boundary region located principally in the dawn-side magnetosphere which is associated with solar wind interaction and the Dungey-cycle. The nature of the ionospheric flow and currents resulting from the combined action of these processes is outlined. In particular, we point out that the region of open field lines associated with the Dungey-cycle should be a region of near-stagnation in the ionosphere in the rest frame of the dipole, compared with surrounding regions of few-km s-1 sub-corotational flow.

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