ISSN 1000-0526
CN 11-2282/P

Volume 17,Issue 6,1991 Table of Contents

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  • 1  The characteristics of isentropic potential vorticity maps and their application to dynamical analysis and prediction
    1991, 17(6):3-11. DOI: 10.7519/j.issn.1000-0526.1991.06.001
    [Abstract](513) [HTML](0) [PDF 915.26 K](486)
    Beginning with the primary principles of isentropic potential vorti-city (IPV), "IPV thought" based on the invertibility principle is introduced in this paper. It includes the typical structure induced both by the isolated upper-air IPV anomalies and surface potential temperature anomalies, and quasi-geostrophic and semi-geostrophic theories on the invertibility principle for time-dependent flow. The "IPV thought" is used to interprete the dynamical characteristics of large scale motions, such as the Rossby waves and shear instabilities and so on. Moreover, the method to work out the IPV maps is given, and the applicable forms and limits of the maps are described. And at the same time the compari-sion between IPV maps and isobaric maps are made.
    2  The ralationship between the East Asian Blocking high and heavy rain in China in summer
    晁淑懿 佟光
    1991, 17(6):12-17. DOI: 10.7519/j.issn.1000-0526.1991.6.002
    [Abstract](456) [HTML](0) [PDF 544.79 K](455)
    In this paper, the observations of the blocking high over the mid-high latitudes in east Asia (45-75°N, 80-120°E) are analysed. The results show that the continous heavy rains in the east part of China often occurred under the conditons with the blocking high circulation. The relation of the major heavy rain zones with the east wind to the south of the East Asian blocking high or with the south branch of the west jet, or with the south boundary of the north wind over the middle latitudes as well as with the axis line of the maximun south wind in the low latitudes are investigated.
    3  The application of the physicas fields to the objective forecast
    1991, 17(6):18-22. DOI: 10.7519/j.issn.1000-0526.1991.6.003
    [Abstract](366) [HTML](0) [PDF 538.07 K](459)
    In this paper, the method to apply the physicas fields to the objective forecast is given based on the article[1]. The advantages of this method are given as well as.

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