HR: 1330h
AN: SA13A-02    [Abstracts]
TI: Thermospheric neutral wind response to geomagnetic storms
AU: * Wang, W
EM: wbwang@ucar.edu
AF: High Altitude Observatory National Center for Atmospheric Research, P. O. Box 3000, Boulder, CO 80307
AU: Burns, A G
EM: aburns@ucar.edu
AF: High Altitude Observatory National Center for Atmospheric Research, P. O. Box 3000, Boulder, CO 80307
AU: Wiltberger, M
EM: wilbermj@ucar.edu
AF: High Altitude Observatory National Center for Atmospheric Research, P. O. Box 3000, Boulder, CO 80307
AU: Solomon, S C
EM: stans@ucar.edu
AF: High Altitude Observatory National Center for Atmospheric Research, P. O. Box 3000, Boulder, CO 80307
AU: Killeen, T L
EM: killeen@ucar.edu
AF: High Altitude Observatory National Center for Atmospheric Research, P. O. Box 3000, Boulder, CO 80307
AU: Lyon, J G
EM: lyon@tinman.dartmouth.edu
AF: Center for Integrated Space Weather Modelling Boston University, 725 Commonwealth Ave., Boston, MA 02155
AU: Goodrich, C
EM: ccg@bu.edu
AF: Center for Integrated Space Weather Modelling Boston University, 725 Commonwealth Ave., Boston, MA 02155
AB: The CISM Coupled Magnetosphere-Ionosphere-Thermosphere (CMIT) model, which includes two-way coupling between the Thermosphere/Ionosphere Nested Grid (TING) Model and the Lyon-Fedder-Mobarry (LFM) global magnetosphere MHD code, is run to investigate the near Earth space weather response to the 12-15 May 1997 geomagnetic storm. In this paper we will focus on the high and middle latitudes thermospheric wind variations during the storm. Two major processes change the storm time neutral wind circulation: an enhanced ion drag effect that forces the neutrals to follow the expanded ion convective drift, and an intensified Joule heating effect that increases the high latitude pressure gradient and thus changes the global wind pattern. We will discuss temporal and spatial evolutions of neutral wind changes after the storm commencement, and the time cadence of neutral wind recovery after the storm. Of particular interest to this study is a jet of neutral winds that occurs in the middle latitudes during the storm.
DE: 2407 Auroral ionosphere (2704)
DE: 2427 Ionosphere/atmosphere interactions (0335)
DE: 2443 Midlatitude ionosphere
DE: 2736 Magnetosphere/ionosphere interactions
DE: 3369 Thermospheric dynamics (0358)
SC: SPA-Aeronomy [SA]
MN: 2005 Joint Assembly