Upper Mesospheric and Lower Thermospheric Temperature Effects Caused by Energetic Particle Precipitation During the 2003 Halloween Storm

Details Upper Mesospheric and Lower Thermospheric Temperature Effects Caused by Energetic Particle Precipitation During the 2003 Halloween Storm Upper Mesospheric and Lower Thermospheric Temperature Effects Caused by Energetic Particle Precipitation During the 2003 Halloween Storm

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsa51a1212s&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #SA51A-1212

Computer Science

Sound

[0342] Atmospheric Composition And Structure / Middle Atmosphere: Energy Deposition, [0358] Atmospheric Composition And Structure / Thermosphere: Energy Deposition, [2455] Ionosphere / Particle Precipitation, [7954] Space Weather / Magnetic Storms

Scientific paper

We investigate the upper mesospheric and lower thermospheric temperature effects caused by energetic particle precipitation during the Halloween storm period in October/November 2003. This study is based on data from the TIMED satellite and the NOAA 15, 16 and 17 satellites. By combining particle measurement from the Medium Energy Proton and Electron Detectors (MEPED) on board the NOAA satellites, crude maps of the global particle precipitation can be obtained close in time to the SABER (Sounding of the Atmosphere using Broadband Emission Radiometry) temperature retrieval on the TIMED satellite. The particle measurements are projected down to 100 km and sorted into a geomagnetic grid, where each cell covers 4 degrees in latitude and 10 degrees in longitude. A global distribution of the precipitating energetic particles is then obtained by interpolating linearly between cells at the same geomagnetic latitudes for the passes of the different satellites. The temperature measurements are sorted into the same geomagnetic grid as used for the particle measurements. We have focused on geomagnetic latitudes between 54 and 66 degrees. In the actual time interval the SABER observations covered local times from 00 hours to 03 hours at these latitudes. For strong particle fluxes we find a temperature increase at 100 km altitude and above, and a temperature decrease at 80-85 km height. We see clearly that the effect on the temperature gradually increases as the particle flux increases.

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