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Altitude variation of the plasmapause signature in the main ionospheric trough
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SYSNO ASEP 0338200 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Altitude variation of the plasmapause signature in the main ionospheric trough Title Výškové změny znaků plazmapauzy v hlavní ionosférické brázdě Author(s) Grebowsky, J. M. (US)
Benson, R. F. (US)
Webb, P. A. (US)
Truhlík, Vladimír (UFA-U) RID, ORCID
Bilitza, D. (US)Source Title Journal of Atmospheric and Solar-Terrestrial Physics. - : Elsevier - ISSN 1364-6826
Roč. 71, č. 16 (2009), s. 1669-1676Number of pages 8 s. Language eng - English Country GB - United Kingdom Keywords Plasmapause ; Ionosphere ; Midlatitude Trough Subject RIV DG - Athmosphere Sciences, Meteorology R&D Projects IAA300420603 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z30420517 - UFA-U, BC-A (2005-2011) UT WOS 000271249000009 DOI 10.1016/j.jastp.2009.05.016 Annotation The projection of the plasmapause magnetic-field lines to low altitudes, where the light-ion chemistry is dominated by O+, tends to occur near the minimum electron density in the main (midlatitude) electron density trough at night. With increasing altitude in the trough, where H+ emerges as the dominant ion on the low-latitude boundary, we have found cases where the plasmapause fieldlines are located on the sharp low-latitude side of the trough as expected if this topside ionosphere H+ distribution varies in step with the plasmapause gradient in the distant plasmasphere. These conclusions are based on near-equatorial crossings of the plasmapause (corresponding to the steep gradient in the dominant species H+) by the Explorer-45 satellite as determined from electric-field measurements by Maynard and Cauffman in the early 1970s and ISIS-2 ionospheric topside-sounder measurements. The former data have now been converted to digital form and made available at http://nssdcftp.gsfc.nasa.gov. Workplace Institute of Atmospheric Physics Contact Kateřina Adamovičová, adamovicova@ufa.cas.cz, Tel.: 272 016 012 ; Kateřina Potužníková, kaca@ufa.cas.cz, Tel.: 272 016 019 Year of Publishing 2010
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