ISSN 1000-0526
CN 11-2282/P

Volume 15,Issue 1,1989 Table of Contents

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  • 1  The application of divergence variation to analysis and forecasting of mesoscale convective systems
    1989, 15(1):3-8. DOI: 10.7519/j.issn.1000-0526.1989.1.001
    [Abstract](457) [HTML](0) [PDF 528.59 K](556)
    The recent study of divergence variation of wind fields and its application to mesoscale system are introduced. It is indicated that the pattern of mesoscale divergence and its change are closely related to the severe weather, which could often predict the appearance of mesoscale weather. Certain terms of divergence equation have been practised in severe weather. The successful results are also discribed here.
    2  A preliminary study on the periodicity of meteorological components related to crop yield
    王馥棠 王石立
    1989, 15(1):9-12. DOI: 10.7519/j.issn.1000-0526.1989.01.002
    [Abstract](459) [HTML](0) [PDF 365.39 K](516)
    In this paper the midium and short periodic fluctuations of meteorological components related to crop yield in China are discussed by means of spectrum analysis,periodogram and variance analysis. It is shown that the spectral distributions in different parts of the country are basically similar and particularly occur in a period of about 4-6 years and even twice of the period. It could be deduced that the fluctuations of agromete-orological thermal factors influence the periodic fluctuations of the meteo rological components related to crop yield and hence result in periodic variations of crop yield.
    3  Pentad,decade and monthly mean SST fields derived from radiation measurements by satellite
    周嗣松 王保华
    1989, 15(1):13-16. DOI: 10.7519/j.issn.1000-0526.1989.1.003
    [Abstract](631) [HTML](0) [PDF 396.16 K](570)
    Here is a computer software system which is adopted to obtain pentad, decade and monthly mean SST from infrared radiation measurements by AVHRR abroad NOAA satellites. The decade and monthly mean SST fields,derived from NOAA-9 AVHRR data in June of 1987,are presented.
    4  A system for GMS stretched data realtime receiving and image processing
    孙松青 吴志根
    1989, 15(1):17-21. DOI: 10.7519/j.issn.1000-0526.1989.1.004
    [Abstract](435) [HTML](0) [PDF 496.92 K](639)
    This system consists of a receiver,a real-time high speed interface and an image computer-processing subsystem. The main principle is that the GMS frame date are transmitted to the high-speed interface through, the demodulator and synchronizer. Then the buffered data are put into three files (i. e. document file, infrared and vissible files) and ingested in a hard disc with large capacity, at same time a selectable-1024 1024-pixel image is shown on the high resolution screen in the real-time and pseudocolor mode.
    5  Analysis and correction of wind effects on precipitation measurements at the head of Urumqi river during summer
    杨大庆 康尔泗 张寅生 姜彤
    1989, 15(1):22-27. DOI: 10.7519/j.issn.1000-0526.1989.01.005
    [Abstract](748) [HTML](0) [PDF 608.35 K](566)
    The concept of wind effects on precipitation measurements is intro-duced. Based on the comparative, measurements obtained with different , gauges, the efficiency of wind shields under, different precipitation conditions and the relationships between the capture rate of a gauge and the average wind speed are determined.With the correction of the errors caused by wind effects in precipitation measurements, relatively accurate values of summer precipitation at the observation point (43°06/N, 87°15'E; 3588m, a.s.l.) in the source area of Urumqi river is obtained.

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