Heating of ambient electrons in thermosphere under varying solar activity conditions

Details Heating of ambient electrons in thermosphere under varying solar activity conditions Heating of ambient electrons in thermosphere under varying solar activity conditions

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsa33b1775s&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SA33B-1775

Physics

[0300] Atmospheric Composition And Structure, [0355] Atmospheric Composition And Structure / Thermosphere: Composition And Chemistry

Scientific paper

The photoelectron flux plays a very important role in the production of various airglow emissions. The solar Extreme Ultra Violet (EUV) photons are mainly responsible for the production of photoelectrons in the atmosphere. These photoelectrons further cause heating of ambient electrons in the thermosphere. In the present study the heating rate of ambient electrons in the thermosphere under the effect of varying solar activity is being studied. The photoelectron flux is calculated as a function of photoelectron energy. The fluxes are calculated at various levels of solar activity and various geographic locations during the period of five years (2001-2005). This flux is further used to calculate the electron heating rate in the thermosphere. It has been found that the maximum electron heating rate is found near 30oN latitude. It is found that the maximum electron heating rate does not vary linearly with F10.7 solar index. The heating rate becomes more or less saturated at the higher values of F10.7 solar index. The altitude of the peak heating rate shows a very little variation with the solar activity. The altitude of peak electron heating rate increases with the increase in the F10.7 solar index.

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