thermospheric vorticity at high geomagnetic latitudes from champ data and its imf dependence

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ID: 257587
2011
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Abstract
Neutral thermospheric wind pattern at high latitudes obtained from cross-track acceleration measurements of the CHAMP satellite above both polar regions are used to deduce statistical neutral wind vorticity distributions and were analyzed in their dependence on the Interplanetary Magnetic Field (IMF). The average pattern confirms the large duskside anticyclonic vortex seen in the average wind pattern and reveals a cyclonic vorticity on the dawnside, which is almost equal in magnitude to the duskside minimum. The outer shape of the vorticity pattern agrees approximately with the outer boundary of region-1 currents in the well-known average current distributions of Iijima and Potemra (1976) The IMF dependence of the vorticity pattern resembles the characteristic FAC and ionospheric plasma drift pattern known from various statistical studies obtained under the same sorting conditions.
Reference Key
frster2011annalesthermospheric Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;M. Förster;S. E. Haaland;S. E. Haaland;E. Doornbos
Journal journal of food measurement and characterization
Year 2011
DOI
10.5194/angeo-29-181-2011
URL
https://www.ann-geophys.net/29/181/2011/angeo-29-181-2011.pdf
Keywords
cosmic physics sciencephysicsgeophysics

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