Middle Atmosphere by R. Alan Plumb, Robert A. Vincent (auth.), R. Alan Plumb,

By R. Alan Plumb, Robert A. Vincent (auth.), R. Alan Plumb, Robert A. Vincent (eds.)

PAGEOPH, stratosphere, those ameliorations supply us with new proof, interpretation of that may materially support to increase our knowing of stratospheric dynamics more often than not. it's now weil demonstrated that smaller-scale motions-in specific gravity waves and turbulence-are of basic significance within the basic move of the mesosphere; they appear to be equally, if much less spectacularly, major within the troposphere, and doubtless additionally within the stratosphere. Our knowing of those motions, their results at the suggest movement and their mutual interactions is progressing speedily, as is weil illustrated by means of the papers during this factor; there are stories of observational reviews, specially with new tools comparable to the japanese MV radar, stories of the country of concept, a laboratory examine and an research of gravity waves and their results within the excessive answer "SKYHI" basic stream version. There are sturdy purposes to suspect that gravity waves will be of the most important importance in making the stratospheric move how it is (modeling adventure being one suggestive piece of facts for this). Direct observational facts has to date been avoided by means of the trouble of constructing observations of such scales of movement during this quarter; in a single examine suggested the following, falling sphere observations are used to procure info at the constitution and depth of waves within the top stratosphere.

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No. 8, Commonwealth Bureau of Meteorology, Melbourne. 180 H. R. Phillpot PAGEOPH, PHILLPOT, H. R. (1969), Antaretie stratospherie warming reviewed in the light 0/1967 observations, Quart. J. R. Met. Soc. 95, 329-348. PHILLPOT, H. R. (1984), Satellite-derived radianee data over high southern latitudes, Met. Dept. Pub. No. 26, University of Me1bourne. WEXLER, H. (1959), Seasonal and other temperature ehanges in the Antaretie atmosphere, Quart. J. R. Met. Soc. 85, 196-208. 20/0 © 1989 Birkhäuser Verlag, Basel PAGEOPH, Vol.

Rowever, there are large-scale systematic differences between the base-level analyses, as shown by the differences of the mean height in Figure I, which lead to significant differences of the circulation statistics and which would not be removed by smoothing the base-level analyses. This study has shown that circulation statistics for the SR stratosphere are dependent on the base-level analyses, to a varying degree. Statistics involving time-averaging and zonal-averaging are more reliable but derived quantities for individual days obtained from any particular base-level analysis should be treated with appropriate caution.

R. ittle different, it pointed strongly to a significant contribution to heating by dynamic processes resulting in subsidence and adiabatic heating. iminary study of available radiosonde observations up to the end of 1963, was made by the author (PHILLPOT, 1964). These observations were mainly at the 100 hPa level because flights to heights much above this were not regularly made due, at least in part, to the failure of the balloon fabrics under the very low temperatures ( ~ - 80°C) encountered at lower stratospheric levels in the late winter period.

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