HR: 14:55h
AN: SA13B-06    [Abstracts]
TI: Ionospheric Heating in Aurora: Observations
AU: * Lummerzheim, D
EM: lumm@gi.alaska.edu
AF: Geophysical Institute, University of Alaska, Fairbanks, AK 99775-5320 United States
AU: Peticolas, L
AF: Space Science Laboratory, University of California, Berkeley, Berkeley, CA 94720-7450 United States
AU: Otto, A
EM: ao@gi.alaska.edu
AF: Geophysical Institute, University of Alaska, Fairbanks, AK 99775-5320 United States
AU: Styers, J
AF: Geophysical Institute, University of Alaska, Fairbanks, AK 99775-5320 United States
AU: Lanchester, B
AF: Solar Terrestrial Physics Group School of Physics and Astronomy, University of Southampton, Southampton, SO17 1BJ United Kingdom
AU: Bristow, B
AF: Geophysical Institute, University of Alaska, Fairbanks, AK 99775-5320 United States
AU: Conde, M
AF: Dept. of Physics, Latrobe University, Bundoora, Melbourne, 3083 Australia
AB: Small scale aurora has brightness structures with a horizontal scale length of less than 1~km. Currents and electric fields have variations on the same scale, but observations on this scale length are difficult and few observations exist. Using averaged quantities from observation with less resolution for the determination of Joule heating leads to underestimates of the heating rates. We will present case studies of different observations of small scale aurora, including ground based optical images and spectroscopic measurements, FAST particle and current data, SuperDARN, and data from ground based wind and temperature imagers.
DE: 2407 Auroral ionosphere (2704)
DE: 2704 Auroral phenomena (2407)
DE: 0310 Airglow and aurora
SC: SPA-Aeronomy [SA]
MN: 2004 AGU Fall Meeting