Department of Geophysics, Faculty of Science, Kyoto University
Department of Geophysics, Faculty of Science, Kyoto University
Department of Geophysics, Faculty of Science, Kyoto University
Japan Meteorological Agency
抄録(英)
An analysis was done of intense midwinter warmings which took place in the southern hemisphere stratosphere during August-September 1988. By using the southern hemispheric data set up to the 1 mb level provided by Japan Meteorological Agency, it is found that the 30 mb temperature increase over eastern Antarctica, about 60 K for 10 days from August 22 to September 1,is associated with the amplification of a quasi-stationary planetary wave of zonal wavenumber 1. The enhancement of wave 1 appears quasi-periodically with a times scale of about 2 weeks during the mid-winter of 1988. Clear evidence is presented to show that the quasi-periodic amplification of wave 1 is due to the wave-wave interaction between the quasi-stationary forced wave of wavenumber 1 and the eastward traveling wave of wavenumber 2. It is emphasized, therefore, that the mechanism of warming in this case is quite different from the transient vertical propagation of a planetary wave forced from below as observed in the northern hemisphere winter.
雑誌書誌ID
AA10756213
雑誌名
Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology
MID-WINTER WARMINGS IN THE SOUTHERN HEMISPHERE STRATOSPHERE IN 1988
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KJ00000767853
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概要
