Ion-neutral coupling in the high-latitude F-layer from incoherent scatter and Fabry-Perot interferometer measurements |
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| Authors: | K Cierpka M J Kosch M Rietveld K Schlegel T Hagfors |
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| Institution: | (1) Max-Planck-Institut Aeronomie, 37191 Katlenburg-Lindau, Germany |
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| Abstract: | 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 frictonal 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. |
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| Keywords: | Ionosphere |
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