HR: 11:10h
AN: SA32A-04    [Abstracts]
TI: Measuring the Dayside Thermospheric Resonse to Extreme Joule Heating Events Using SuperDARN and TIMED GUVI
AU: * Baker, J B
EM: joseph.baker@jhuapl.edu
AF: Johns Hopkins University Applied Physics Laboratory, 11100 Johns Hopkins Road, Laurel, MD 20723 United States
AU: Greenwald, R A
EM: raymond.greenwald@jhuapl.edu
AF: Johns Hopkins University Applied Physics Laboratory, 11100 Johns Hopkins Road, Laurel, MD 20723 United States
AU: Paxton, L J
EM: larry.paxton@jhuapl.edu
AF: Johns Hopkins University Applied Physics Laboratory, 11100 Johns Hopkins Road, Laurel, MD 20723 United States
AU: Zhang, Y
EM: yongliang.zhang@jhuapl.edu
AF: Johns Hopkins University Applied Physics Laboratory, 11100 Johns Hopkins Road, Laurel, MD 20723 United States
AU: Ruohoniemi, J M
EM: mike.ruohoniemi@jhuapl.edu
AF: Johns Hopkins University Applied Physics Laboratory, 11100 Johns Hopkins Road, Laurel, MD 20723 United States
AU: Oksavik, K
EM: Kjellmar.oksavik@jhuapl.edu
AF: Johns Hopkins University Applied Physics Laboratory, 11100 Johns Hopkins Road, Laurel, MD 20723 United States
AB: A major goal of the NASA TIMED spacecraft is to understand the transfer of energy from the magnetosphere into the Mesosphere-Lower-Thermosphere-Ionosphere (MLTI) region. Joule and auroral particle heating at high latitudes are two processes by which magnetospheric energy can be deposited within the MLTI. In this session, we will present large-scale maps of dayside Joule heating rates obtained by combining ionospheric electric field measurements from the Super Dual Auroral Radar Network (SuperDARN) with estimates for the ionospheric Pedersen conductance obtained from TIMED Global Ultraviolet Imager (GUVI) auroral images. These Joule heating maps will be compared with maps of the GUVI O/N2 ratio, thereby providing a measure of the change in thermospheric composition associated with the Joule heating events and the subsequent transport of those perturbations via neutral winds.
DE: 0310 Airglow and aurora
DE: 0358 Thermosphere: energy deposition (3369)
DE: 2704 Auroral phenomena (2407)
DE: 2712 Electric fields (2411)
DE: 2736 Magnetosphere/ionosphere interactions (2431)
SC: SPA-Aeronomy [SA]
MN: Fall Meeting 2005