ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Volume 20,Issue 8,1994 Table of Contents
1994, 20(8):3-6.
DOI: 10.7519/j.issn.1000-0526.1994.08.001
Abstract:
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.
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.
1994, 20(8):7-11.
DOI: 10.7519/j.issn.1000-0526.1994.08.002
Abstract:
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.
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.
1994, 20(8):12-16.
DOI: 10.7519/j.issn.1000-0526.1994.08.003
Abstract:
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.
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.
1994, 20(8):17-21.
DOI: 10.7519/j.issn.1000-0526.1994.8.004
Abstract:
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.
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.
1994, 20(8):22-25.
DOI: 10.7519/j.issn.1000-0526.1994.8.005
Abstract:
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.
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.
1994, 20(8):26-31.
DOI: 10.7519/j.issn.1000-0526.1994.8.006
Abstract:
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.
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.
1994, 20(8):32-36.
DOI: 10.7519/j.issn.1000-0526.1994.8.007
Abstract:
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.
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.
1994, 20(8):37-42.
DOI: 10.7519/j.issn.1000-0526.1994.8.008
Abstract:
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.
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.
1994, 20(8):43-47.
DOI: 10.7519/j.issn.1000-0526.1994.8.009
Abstract:
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.
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.
1994, 20(8):48-49.
DOI: 10.7519/j.issn.1000-0526.1994.8.010
Abstract:
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.
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.
1994, 20(8):50-53.
DOI: 10.7519/j.issn.1000-0526.1994.8.011
Abstract:
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.
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.
1994, 20(8):54-57.
DOI: 10.7519/j.issn.1000-0526.1994.8.012
Abstract:
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 ℃.
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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ISSN:1000-0526 CN:11-2282/P