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Studies of atmospheric internal gravity waves at Halley station, Antarctica, using radiosondes

Published online by Cambridge University Press:  14 May 2004

S.D. Mobbs  and
J.M. Rees
S.D. Mobbs
Affiliation:
Department of Applied Mathematical Studies, University of Leeds, Leeds LS2 9JT, UK
J.M. Rees
Affiliation:
Department of Applied Mathematical Studies, University of Leeds, Leeds LS2 9JT, UK British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge, CB3 0ET, UK Department of Applied and Computational Mathematics, University of Sheffield. Sheffield S10 2TN, UK
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Abstract

Analysis of high-resolution data from slow-ascent radiosondes released at Halley station, Antarctica (75°38′S, 26°40′W), shows that internal gravity wave phenomena are frequently present in the lower troposphere. There is a strong tendency for these waves to induce a vertical transport of the SE-NW component of momentum, this being the component perpendicular to the alignment of regular ridges in the ice shelf on which the base is built and is independent of the mean wind direction. A method for estimating the variation of the momentum fluxes with height is described. Results show that momentum flux divergences equivalent to accelerations of about 10 ms−1 per day are common at Halley.

Keywords

Boundary layerHalley stationinternal gravity wavesradiosondes
Type
Papers—Atmospheric Sciences
Information
Antarctic Science , Volume 1 , Issue 1 , March 1989 , pp. 65 - 75
Copyright
© Antarctic Science Ltd 1989

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