Heating of the Lower Thermosphere during Auroral Activity: Measurements and Analysis from the Joule Sounding Rocket Missions

Details Heating of the Lower Thermosphere during Auroral Activity: Measurements and Analysis from the Joule Sounding Rocket Missions Heating of the Lower Thermosphere during Auroral Activity: Measurements and Analysis from the Joule Sounding Rocket Missions

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsa51c1647c&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SA51C-1647

Computer Science

Sound

[0358] Atmospheric Composition And Structure / Thermosphere: Energy Deposition, [2407] Ionosphere / Auroral Ionosphere, [2411] Ionosphere / Electric Fields, [2455] Ionosphere / Particle Precipitation

Scientific paper

Presented and discussed are measurements and analyses from the two Joule sounding rocket missions. The missions were launched into the high-latitude lower thermosphere during periods of auroral activity. Energy deposition due to Joule heating and charged particle precipitation are determined. The effects of this energy deposition in the form of vertical structure in the temperature of the neutral gas are shown and discussed. A peak temperature enhancement over the predictions of the MSIS model of nearly 200 K is seen at about 125 km during the upleg of one of the missions, while the Joule heating is observed to peak at about 120 km. The zonal and meridional winds are also observed to peak in this altitude range. Analyses are used to estimate the degree to which the energy deposition can explain the observed wave-like temperature excursions.

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