Thermospheric wind, temperature, and compositional response to auroral events above Alaska and Western Canada

Details Thermospheric wind, temperature, and compositional response to auroral events above Alaska and Western Canada Thermospheric wind, temperature, and compositional response to auroral events above Alaska and Western Canada

May 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agusmsa52b..06c&link_type=abstract

American Geophysical Union, Spring Meeting 2002, abstract #SA52B-06

Physics

3369 Thermospheric Dynamics (0358), 2407 Auroral Ionosphere (2704), 2427 Ionosphere/Atmosphere Interactions (0335), 2435 Ionospheric Disturbances

Scientific paper

We use data from three Fabry-Perot spectrometers located in Alaska and Western Canada to observe the thermosphere's wind and temperature response to auroral forcing events. In particular, large vertical wind events are known to modify the compositional structure of thermosphere at both E- and F-region altitudes. We have developed techniques for mapping the wind-driven vertical displacement of the atmospheric column above 100-km altitude due to these events, based on satellite ultraviolet auroral images. Displacements inferred from POLAR UVI images are shown to be consistent with vertical winds measured by the ground-based Fabry-Perot instruments. With appropriate definitions of the GUVI "color" channels, this same technique could be applied to TIMED-GUVI images. Although GUVI would not produce the long time-series of vertical displacement data that are available from POLAR-UVI, GUVI could instead map the column displacements at much higher spatial resolution.

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