HR: 11:15h
AN: SA31B-04 INVITED     [PDF]
TI: High-latitude Energy and Momentum Balance in the Lower Thermosphere
AU: * Richmond, A D
EM: richmond@ucar.edu
AF: NCAR High Altitude Observatory, P.O. Box 3000, Boulder, CO 80307-3000 United States
AU: Roble, R G
EM: roble@ucar.edu
AF: NCAR High Altitude Observatory, P.O. Box 3000, Boulder, CO 80307-3000 United States
AU: Kwak, Y
EM: ys-kwak@hanmail.net
AF: Kyungpook National University, Department of Astronomy and Atmospheric Sciences, Sankyuk-dong, Buk-ku, Daegu, 702-701 Korea, Republic of
AU: Wang, W
EM: wbwang@ucar.edu
AF: NCAR High Altitude Observatory, P.O. Box 3000, Boulder, CO 80307-3000 United States
AU: Burns, A G
EM: aburns@ucar.edu
AF: NCAR High Altitude Observatory, P.O. Box 3000, Boulder, CO 80307-3000 United States
AB: The high-latitude lower thermosphere is significantly influenced by energy and momentum forcing associated with magnetosphere-ionosphere coupling. Electric currents produce a force on the air and dissipate energy through Joule heating. The precipitation of energetic electrons and ions into the auroral regions produces additional direct heating, and also influences the energy balance through production of stored chemical energy, through modification of the concentrations of radiatively active species, and through modification of the electrical conductivity. We examine the resulting energy and momentum balance of the lower thermosphere with the aid of a thermosphere-ionosphere-electrodynamics general circulation model.
DE: 0355 Thermosphere--composition and chemistry
DE: 0358 Thermosphere--energy deposition
DE: 2427 Ionosphere/atmosphere interactions (0335)
DE: 2475 Polar cap ionosphere
DE: 3369 Thermospheric dynamics (0358)
SC: SPA - Aeronomy [SA]
MN: 2003 Fall Meeting