Physics
Scientific paper
May 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sa52c03e&link_type=abstract
American Geophysical Union, Spring Meeting 2001, abstract #SA52C-03
Physics
2427 Ionosphere/Atmosphere Interactions (0335), 3369 Thermospheric Dynamics (0358)
Scientific paper
We use extensive wind measurements from the Wind Imaging Interferometer on board UARS to study the average storm time dependent response of low- and mid-latitude upper thermospheric winds to magnetospheric disturbances. Our results show equatorward wind perturbations developing at mid latitudes shortly after enhancements in the high-latitude current systems, and reaching low latitudes in about 2-3 h. These equatorward disturbances undergo an abatement 5-6 h after storm onset (as a result of the surge from the conjugate hemisphere) and subsequently increase. The zonal disturbance winds, which are mostly confined to latitudes above 30 degrees, build up fairly steadily in the westward direction during the first 12 h after storm onset. Our results are generally consistent with storm time evolution predictions from numerical global circulation models.
Emmert John T.
Fejer Bela G.
Shepherd Gordon G.
Solheim Brian H.
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