Enhanced EISCAT UHF backscatter during high-energy auroral electron precipitation
2013 (English)In: Annales Geophysicae, ISSN 0992-7689, E-ISSN 1432-0576, Vol. 31, no 10, 1681-1687 p.Article in journal (Refereed) Published
Natural enhancements in the backscattered power of incoherent scatter radars up to 5 orders of magnitudes above the thermal backscatter are sometimes observed at high latitudes. Recently observations of enhancements in the backscattered power including a feature at zero Doppler shift have been reported. These enhancements are limited in altitude to tens of kilometers. The zero Doppler shift feature has been interpreted as a signature of electron density cavitation. Enhanced plasma lines during these observations have also been reported. We report on the first EISCAT UHF observations of enhanced backscattered radar power including a zero Doppler shift feature. The enhancements originated from two distinct and intermittent layers at about 200 km altitude. The altitude extent of the enhancements, observed during auroral high-energy electron precipitation, was < 2 km.
Place, publisher, year, edition, pages
2013. Vol. 31, no 10, 1681-1687 p.
Ionosphere, Auroral ionosphere
Earth and Related Environmental Sciences
IdentifiersURN: urn:nbn:se:kth:diva-116667DOI: 10.5194/angeo-31-1681-2013ISI: 000326548600007ScopusID: 2-s2.0-84885789204OAI: oai:DiVA.org:kth-116667DiVA: diva2:599836
FunderSwedish Research Council
QC 20131129. Updated from manuscript to article in journal.2013-01-242013-01-222015-03-03Bibliographically approved