ISSN 1000-0526
CN 11-2282/P

Volume 20,Issue 8,1994 Table of Contents

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  • 1  The Characteristics of Interannual Change for Annual and Rainy Season Runoff in the Miyun Reseroir Area, Beijing
    张永山 何素兰 汤克靖
    1994, 20(8):3-6. DOI: 10.7519/j.issn.1000-0526.1994.08.001
    [Abstract](589) [HTML](0) [PDF 130.82 K](403)
    By using methods of classification, accumulation and spectral analysis, the characteristics of annual and rainy season runoff from 1919 to 1989 in the Miyun Reseroir Area have been analyzed. It is characterized by continuity,periodicity as well as deficit of periodic runoff.
    2  The Analysis on the Convective Weather near the Center of Subtropical High in the Nonthern Part of Jiangxi Province
    1994, 20(8):7-11. DOI: 10.7519/j.issn.1000-0526.1994.08.002
    [Abstract](411) [HTML](0) [PDF 156.76 K](356)
    It is an exceptional phenomenon that the convection occurred near the center of subtropical high, its mechanism is obviously different from that of common convection. The convection on August 14 1993 is analysed, and the general factors of convection occurence near the center of subtropical high are summed up.
    3  Geographical Distribution of Relative Humidity of Chinese Skin
    1994, 20(8):12-16. DOI: 10.7519/j.issn.1000-0526.1994.08.003
    [Abstract](703) [HTML](0) [PDF 163.36 K](384)
    According to Berglund's formula (1983 ): W =(esk-ea)/essk-ea), the relative humidity of man's skin is calculated by means of the monthly mean value of air temperature,vapour pressue and skin temperature. The climate comfort belts are divided according to the relative humidity of the skin. It showed that the main factors which decided the distribution of the relative humidity of Chinese skin are latitude,distribution of sea-land, topography and atmospheric circulation. China's climate comfort belt is defined according to the relative humidity of the skin 25% - 45%.There are obvious regional difference and seasonal variance in the China's climate comfort belt.
    4  Design and Structure of Torrential Rains Operational Nowcasting System in the Middle Reaches of the Changjiang River(MYTRONS)
    金鸿祥 杨金政
    1994, 20(8):17-21. DOI: 10.7519/j.issn.1000-0526.1994.8.004
    [Abstract](276) [HTML](0) [PDF 221.27 K](355)
    The operational systems,using modern sophisticated technology with the purpose of monitoring and nowcasting middle scale severe weather events being a main area in meteorology,have been developing vigorously in the world since the late 1970s. In the 1980s, starting from the introduction of an American Digital Weather Radar System to the completion of the Project for《Severe Weather Monitoring and Very-short Range Forecasting System》subjected to the National Program in the 7th Five-years Plan,the Wuhan Central Weather Service had developed and established a modernized Torrential Rains Operational Nowcasting System in the middle reaches of the Changjiang River(MYTRONS). From the view point of system engineering, the author describes the design consideration, technical strategy and systematic structure. The success of MYTRONS signifies the significant progress in the modernization of operational meteorology in China.
    5  Dual-digital Processing System of Wuhan Digitized Weather Radar
    方明 陈忠勇 项经魁
    1994, 20(8):22-25. DOI: 10.7519/j.issn.1000-0526.1994.8.005
    [Abstract](454) [HTML](0) [PDF 131.99 K](373)
    With dual-digital processing System, the stability and image quality of WSR-81S radar which is the Central radar in MYTRONS system have been greatly improved,and more products and types of image can be acquired in one scanning period. The potentialities of the radar imported from U. S. A. has been further released.
    6  The Interactive Processing,System Integrated Weather Radar Composite and Satellite Images in Real Time
    万玉发 陈少林 罗建国
    1994, 20(8):26-31. DOI: 10.7519/j.issn.1000-0526.1994.8.006
    [Abstract](599) [HTML](0) [PDF 225.19 K](368)
    As a key link of synthetic processing in MYTRONS, MYWMS system has been successfully designed and developed with dual functions. It has not only the capability of integratedimages of radar network and satellite, that makes analysis and extrapolation forecasting of the cloud rain field similar to FRONTIERS workstation,but also the function as central processing of automatic composite image from digitized weather radar network in the Middle Reaches of the Yangtze River.
    7  Features and Application of Wuhan Weather Information Dissemination Service System
    冯斌贤 罗建国 万定祥
    1994, 20(8):32-36. DOI: 10.7519/j.issn.1000-0526.1994.8.007
    [Abstract](435) [HTML](0) [PDF 183.72 K](357)
    Using advanced techniques incorporating data broadcasting and remote PC terminal,the dissemination and service system of MYTRONS-Wuhan Weather information Dissemination and Service System(WIDSS) with features of high powerful,reaLtirne and multifunctions was designed and developed successfully. As a result,great social and economic bent fis have been obtained in operrational use.
    8  The Application of MYTRONS to Nowcasting and Studies of Torrential Rain
    徐双柱 项经魁 万玉发 张家国 吴翠红
    1994, 20(8):37-42. DOI: 10.7519/j.issn.1000-0526.1994.8.008
    [Abstract](399) [HTML](0) [PDF 205.47 K](354)
    The application of MYTRONS to nowcasting and studies of torrential rain in the middle reaches of the Changjiang river is described. As MYTRONS was established,the forming knowledge and the forecasting ability of torrential rain were improved. Obvious social and economic benefits have been obtained.
    9  An Analysis on Distribution of Convective Weather and Influence by Topography in Jilin Province
    谢静芳 王晓明
    1994, 20(8):43-47. DOI: 10.7519/j.issn.1000-0526.1994.8.009
    [Abstract](574) [HTML](0) [PDF 183.71 K](379)
    The relationship between the distribution of strong convective weather(hail) and the general convective weather(storm) with topography is analysed. Consequently,the mechanism of topography effect on convective weather has been revealed. The result is very important for the analysis and forecasting of strong convective weather.
    10  Entropy Diagnosis of a Heavy Rain Process
    1994, 20(8):48-49. DOI: 10.7519/j.issn.1000-0526.1994.8.010
    [Abstract](340) [HTML](0) [PDF 104.89 K](343)
    With the aid of entropy balance equation, a heavy rain process in the central and southern parts of Hebei Province during 4-5 August 1993 is diagnosed.
    11  A Summary in Earth-Atmosphere Coupling for 1993 Flood Season Precipitation Forecast
    蔡英 汤懋苍
    1994, 20(8):50-53. DOI: 10.7519/j.issn.1000-0526.1994.8.011
    [Abstract](399) [HTML](0) [PDF 132.12 K](368)
    Flood season precipitation forecasts of 1993 were made with two new research results in the last two years except the routine methods many years ago. (1)The relation between earthquake field and precipitation field:there are weak earthquakes in the Pacific Ocean and Taiwan,this will benefit east China with much rainfall,from July 1992 to March 1993 six earthquakes of magnitude 2-3 occurred in the Changjiang river valley and the earthquakes in North China are very weak. This forebodes the high temperature area of the middle and lower reaches of Changjiang rivier,so we forecast in the northern part of the Changjiang river basin there will be much rain this year. (2) Developing rule of 3. 2 meter earth temperature anomaly field. There are 14 high temperature centers at the figure of 3. 2 meter earth temperature anomaly from Dec. 1992 to Feb. 1993. The historical development,suggest,that if high ternperature centers still exist or become strong,much rainfall could be received,otherwise,thexe will be less rainfall.
    12  The Estimation of the Spatial Distribution of Mean Monthly Soil Temperature at 5cm Depth
    刘学著 周守华
    1994, 20(8):54-57. DOI: 10.7519/j.issn.1000-0526.1994.8.012
    [Abstract](510) [HTML](0) [PDF 124.10 K](385)
    The estimation of the spatial distribution of mean monthly soil temperature in January,April,July and October at a depth of 5cm in Beijing,Tianjin and Hebei district was made by two approches. One is with a regression model in which the predictors of Latitude,Longitude and Sea Level are involved. The other is with the Kriging surface fitting method. The results show that the standard deviation of residual errors of the regression model is 0. 4-0. 7℃,the standard deviation of residual erorrs of the Kriging estimation is 0. 2-0.3 ℃. In addition,as the value of latitude incrises by one degree soil temperature decrises by 0. 2-0.8℃,as the value of longitude incrises by one degree soil temperature decrises by 0. 3-Al-0.7℃, as the value of sea level incrises 100 meters the soil temperature decrises by 0. 5-0. 7 ℃.

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