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Solar flux variation of the electron temperature morning overshoot in the equatorial F region
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SYSNO ASEP 0366447 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Solar flux variation of the electron temperature morning overshoot in the equatorial F region Tvůrce(i) Stolle, C. (DK)
Liu, H. (JP)
Truhlík, Vladimír (UFA-U) RID, ORCID
Lühr, H. (DE)
Richards, G. (US)Zdroj.dok. Journal of Geophysical Research - ISSN 0148-0227
Roč. 116, - (2011), A04308/1-A04308/13Poč.str. 13 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova IONOSPHERIC PHOTOELECTRON FLUX ; MODEL ; DENSITY ; ATMOSPHERE ; ION Vědní obor RIV DG - Vědy o atmosféře, meteorologie CEP GAP209/10/2086 GA ČR - Grantová agentura ČR CEZ AV0Z30420517 - UFA-U, BC-A (2005-2011) UT WOS 000289644900005 DOI 10.1029/2010JA016235 Anotace Using 8 years of CHAMP satellite observations of the equatorial electron temperature, T(e), we investigate its behavior during the morning overshoot and at ionospheric altitudes below 450 km including its variation with solar activity. The morning T(e) has a maximum at the dip equator and decreases gradually with increasing latitude, which is due to the increasing importance of heat conduction as the dip angle becomes larger. The amplitude of the equatorial morning overshoot T(e) decreases with increasing solar flux by about -10 degrees K/solar flux unit depending on season and longitude. Trends of similar magnitude are predicted by the FLIP model. The model calculations confirm that the electron cooling due to enhanced electron-ion collisions increases faster than the heating of thermal electrons through collision with photoelectrons for increasing solar EUV. Both data and model showed that elevated electron temperatures persist to later local times during low solar activity. Pracoviště Ústav fyziky atmosféry Kontakt Kateřina Adamovičová, adamovicova@ufa.cas.cz, Tel.: 272 016 012 ; Kateřina Potužníková, kaca@ufa.cas.cz, Tel.: 272 016 019 Rok sběru 2012 Elektronická adresa http://www.agu.org/pubs/crossref/2011/2010JA016235.shtml
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