Global MHD modeling of the impact of a solar wind pressure change

Global MHD modeling of the impact of a solar wind pressure change

A sudden increase in the solar wind dynamic pressure compresses the magnetosphere and launches compressional waves into the magnetosphere. The global response of the magnetosphere, including the ionosphere and the location of the field‐aligned current (FAC) generation, to a step increase in the sola...

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Veröffentlicht in:Journal of Geophysical Research: Space Physics 2002-07, Vol.107 (A7), p.SMP 21-1-SMP 21-8
Hauptverfasser: Keller, Kristi A., Hesse, Michael, Kuznetsova, Maria, Rastätter, Lutz, Moretto, Therese, Gombosi, Tamas I., DeZeeuw, Darren L.
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solar wind pressure changes
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container_end_page SMP 21-8
container_issue A7
container_start_page SMP 21-1
container_title Journal of Geophysical Research: Space Physics
container_volume 107
creator Keller, Kristi A.
Hesse, Michael
Kuznetsova, Maria
Rastätter, Lutz
Moretto, Therese
Gombosi, Tamas I.
DeZeeuw, Darren L.
description A sudden increase in the solar wind dynamic pressure compresses the magnetosphere and launches compressional waves into the magnetosphere. The global response of the magnetosphere, including the ionosphere and the location of the field‐aligned current (FAC) generation, to a step increase in the solar wind density has been studied using a global three‐dimensional adaptive MHD model. As the density increase propagated along the flanks of the magnetopause, a two‐phased response was seen in the ionosphere. The first response was an increase in FACs near the polar cap. For this response we found the location of FACs to lie just inside the magnetosphere. The second response was an increase in FACs at lower latitudes. The increase in FACs was in the same direction as region 1 currents. For the second response we found the location of FACs to fall well within the magnetosphere.
doi_str_mv 10.1029/2001JA000060
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title Global MHD modeling of the impact of a solar wind pressure change
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