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Enhancement in electron and ion temperatures due to solar flares as measured by SROSS-C2 satellite

By D. K. Sharma, J. Rai, M. Israil, P. Subrahmanyam, P. Chopra and S. C. Garg

Abstract

International audienceThe observations on the ionospheric electron and ion temperatures (Te and Ti) measured by the RPA payload aboard the SROSS-C2 satellite have been used to study the effect of solar flares on ionospheric heating. The data on solar flare has been obtained from the National Geophysical Data Center (NGDC) Boulder, Colorado (USA). It has been found that the electron and ion temperatures have a consistent enhancement during the solar flares on the dayside Earth's ionosphere. The estimated enhancement for the average electron temperature is from 1.3 to 1.9 times whereas for ion temperature it is from 1.2 to 1.4 times to the normal days average temperature. The enhancement of ionospheric temperatures due to solar flares is correlated with the diurnal variation of normal days' ionospheric temperatures. The solar flare does not have any significant effect on the nightside ionosphere. A comparison with the temperature obtained from the IRI-95 model also shows a similar enhancement

Topics: [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences
Publisher: European Geosciences Union
Year: 2004
OAI identifier: oai:HAL:hal-00317421v1
Provided by: HAL-INSU
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