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VHF radar measurements in the summer polar mesosphereMeasurements in the mesosphere over Andoya/Norway (69 N, 16 E) were carried out using the mobile SOUSY-VHF radar with an extended beam configuration during the MAC/SINE campaign in summer 1987. First results of a 48 h and a 3 h observational period for heights between about 83 and 91 km are presented. Zonal mean winds are characterized by a strong westward flow of up to 50/ms, whereas the equatorward directed meridional component is weaker. The dominating semidiurnal tide has amplitudes up to 30/ms and a vertical wavelength of about 55 km. The diurnal tide is less pronounced. The total upward flux of horizontal momentum takes values of -2 sq m/sq s near 84 km and increases with increasing height, reaching a maximum value of 22 sq m/sqs for both the zonal and meridional components. However, measurements of the horizontal isotropy of the wave field suggest significant anisotropy. The major contribution to the momentum flux is from the 10 min to 1 h period range below about 87 km, and from the 1 to 6 h period range above this height.
Document ID
19890020535
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Ruester, R.
(Max-Planck-Inst. fuer Aeronomie Katlenburg-Lindau, Germany)
Reid, I. M.
(Max-Planck-Inst. fuer Aeronomie Katlenburg-Lindau, Germany)
Czechowsky, P.
(Max-Planck-Inst. fuer Aeronomie Katlenburg-Lindau, Germany)
Schmidt, G.
(Max-Planck-Inst. fuer Aeronomie Katlenburg-Lindau, Germany)
Date Acquired
September 6, 2013
Publication Date
April 1, 1989
Publication Information
Publication: International Council of Scientific Unions, Middle Atmosphere Program. Handbook for MAP, volume 27
Subject Category
Geophysics
Accession Number
89N29906
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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