Ion-neutral coupling in the high-latitude F-layer from incoherent scatter and Fabry-Perot interferometer measurements
Since the auroral ionosphere provides an important energy sink for the magnetosphere, ionosphere-thermosphere coupling must be investigated when considering the energy budget of the ionosphere-magnetosphere coupling. We present the first Scandinavian ground-based study of high-latitude F-region ion-...
| Published in: | Annales Geophysicae |
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| Main Authors: | , , , , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Springer Verlag
2000
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| Subjects: | |
| Online Access: | https://doi.org/10.1007/s00585-000-1145-0 https://noa.gwlb.de/receive/cop_mods_00036674 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00036628/angeo-18-1145-2000.pdf https://angeo.copernicus.org/articles/18/1145/2000/angeo-18-1145-2000.pdf |
| Summary: | Since the auroral ionosphere provides an important energy sink for the magnetosphere, ionosphere-thermosphere coupling must be investigated when considering the energy budget of the ionosphere-magnetosphere coupling. We present the first Scandinavian ground-based study of high-latitude F-region ion-neutral frictional heating where ion velocity and temperature are measured by the EISCAT incoherent scatter radar as well as neutral wind and temperature being measured simultaneously by a Fabry-Perot interferometer. A geomagnetically active period (Kp = 7– – 5–) and quiet period (Kp = 0+ – 0) were studied. Neglecting the neutral wind can result in errors of frictional heating estimates of 60% or more in the F-layer. About 96% of the local ion temperature enhancement over the neutral temperature is accounted for by ion-neutral frictional heating. Key words: Ionosphere (auroral ionosphere; ionosphere-atmosphere interactions) |
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