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Energy input from the exterior cusp into the ionosphere: Correlated ground-based and satellite observations
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Swedish Institute of Space Physics, Uppsala Division.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Swedish Institute of Space Physics, Uppsala Division.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Swedish Institute of Space Physics, Uppsala Division.
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2007 (English)In: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 34, no 4, L04102- p.Article in journal (Refereed) Published
Abstract [en]

The energy transport from the exterior cusp into the ionosphere is investigated using coordinated ground-based (EISCAT and MIRACLE) and satellite ( Cluster) observations. EISCAT and MIRACLE data are used to estimate the plasma heating in the F-region and the Joule heating in the E-region. Cluster measurements are used to derive the electromagnetic and particle energy fluxes at the high altitudes. These fluxes are then compared with the energy deposition into the ionospheric cusp during a 30 minutes long time interval in which Cluster and EISCAT are nearly conjugated. It is shown that the particles seen at about 9 Re in the exterior cusp carry an earthward energy flux that corresponds to the observed heating of the F-region. The estimated earthward Poynting flux is more than enough to account for the Joule heating in the E-region.

Place, publisher, year, edition, pages
2007. Vol. 34, no 4, L04102- p.
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-150913DOI: 10.1029/2006GL028617ISI: 000244474200003OAI: oai:DiVA.org:uu-150913DiVA: diva2:409289
Available from: 2011-04-07 Created: 2011-04-07 Last updated: 2017-12-11Bibliographically approved

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