Other
Scientific paper
May 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agusmsm31d..05y&link_type=abstract
American Geophysical Union, Spring Meeting 2008, abstract #SM31D-05
Other
2723 Magnetic Reconnection (7526, 7835), 2728 Magnetosheath, 2736 Magnetosphere/Ionosphere Interactions (2431)
Scientific paper
A sudden southward turning of IMF is simulated by the University of Michigan BATSRUS model. After the northward to southward transition of IMF at a solar wind speed of 400km/s encounters the bow shock, it takes about 6 minutes to propagate to the magnetopause, eating up the northward IMF inside the magnetosheath and excites the dayside reconnection. The ionospheric response to this sudden southward IMF transition is delayed by another ~4 minutes, during which, conversions from the cusp reconnection to dayside reconnection and Alf'ven wave propagation take place, carrying dayside plasma down to the Earth; thereafter changes in the ionosphere and ground magnetic perturbations associated with the southward IMF are observed. These responses appear to be globally onset. The time it takes from the bow shock hitness to the ionospheric reaction varies with the solar wind speed.
Ridley A. A.
Yu Yue
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