Energy input from the exterior cusp into the ionosphere: Correlated ground-based and satellite observations
2007 (English)In: Geophysical Research Letters, ISSN 0094-8276, Vol. 34, no 4, L04102- p.Article in journal (Refereed) Published
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.
IdentifiersURN: urn:nbn:se:uu:diva-150913DOI: 10.1029/2006GL028617ISI: 000244474200003OAI: oai:DiVA.org:uu-150913DiVA: diva2:409289