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van Eyken et al. 2000

van Eyken, A.P., Williams, P.J.S., Buchert, S.C. and Kunitake, M. (2000). First measurements of tidal modes in the lower thermosphere by the EISCAT Svalbard radar. Geophysical Research Letters 27: doi: 10.1029/1999GL003687. issn: 0094-8276.

First measurements by the EISCAT Svalbard Radar of ion velocities in the lower thermosphere show the presence of strong tidal or quasi-tidal modes with periods of 24, 12 and 8 hours. The diurnal mode shows no variation of phase with height above 100 km. In contrast, the semidiurnal and terdiurnal modes show a steady variation of phase with height corresponding to vertical wavelengths of about 40 km and 30 km respectively. In addition there is evidence at 93 km, the lowest height measured, of a planetary wave with a period of 2--3 days. ¿ 2000 American Geophysical Union

BACKGROUND DATA FILES

	Abstract

Keywords
Meteorology and Atmospheric Dynamics, Waves and tides, Radio Science, Radar atmospheric physics

Journal
Geophysical Research Letters
http://www.agu.org/journals/gl/

Publisher
American Geophysical Union
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