Thermospheric Temperature Variability from Incoherent Scatter Radar Long-duration Experiments at Millstone Hill

Details Thermospheric Temperature Variability from Incoherent Scatter Radar Long-duration Experiments at Millstone Hill Thermospheric Temperature Variability from Incoherent Scatter Radar Long-duration Experiments at Millstone Hill

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsa33a1066z&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #SA33A-1066

Physics

0328 Exosphere, 2443 Midlatitude Ionosphere, 6929 Ionospheric Physics (1240, 2400), 7900 Space Weather, 7974 Solar Effects

Scientific paper

Incoherent scatter radar experiments at Millstone Hill conducted for 30 consecutive days have been conducted in October 2002, September 2005 and March 2006, enabling this study of the day-to-day thermospheric variability. Based on the radar's plasma temperature and electron density observations, daytime thermospheric parameters, in particular, exospheric and thermobase temperatures, are derived using an established technique. Solar and magnetic influences on the thermospheric variability are investigated. Our results indicate, even for very weak magnetic activity, a very clear correlation between the upper atmospheric temperaure and Dst index. There is also a very clear correlation between the temperature and solar 10.7 cm flux. It is shown that the major part of the day-to-day varibaility in thermospheric temperature at Millstone Hill is due to solar flux variability with additional contribution due to magnetic activity. We also discuss quantively effects of these major sources of variability.

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