ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Volume 20,Issue 2,1994 Table of Contents
1994, 20(2):3-10.
DOI: 10.7519/j.issn.1000-0526.1994.02.001
Abstract:
On the basis of discussion about various budget equations,the horizontal pattern and vertical profiles of apparent source and sink with direct and indirect methods over the Changjiang River basin during Mei-yu heavy rain are summarized. Although the results are different and difficult to compare for each case,region or data,but this is certainly followed by an important vertical transport process of subgrid-scale,which reflects the striking effect of cumulus convection on largescale environment.Thus,for any prognostic models of heavy rain over the midlatitutes,it is necesary to add the parameterization of subgrid-scale motion.
On the basis of discussion about various budget equations,the horizontal pattern and vertical profiles of apparent source and sink with direct and indirect methods over the Changjiang River basin during Mei-yu heavy rain are summarized. Although the results are different and difficult to compare for each case,region or data,but this is certainly followed by an important vertical transport process of subgrid-scale,which reflects the striking effect of cumulus convection on largescale environment.Thus,for any prognostic models of heavy rain over the midlatitutes,it is necesary to add the parameterization of subgrid-scale motion.
1994, 20(2):11-17.
DOI: 10.7519/j.issn.1000-0526.1994.2.002
Abstract:
Dignosis shows that the basic contributing factors caused the exceedingly heavy rain during August 4-5, 1993 in southern Shandong Province are as the following. Under the suitable circulation background as subtropical high intensified and spreaded westward,and the plateau trough moved eastwards with the southwest vortex,warm and wet air with southerly jet at the low layer were transported and reached over the stationary front (from west to east) in the front of the convergence core of the law vortex,and forced lifted, then, MCC (Meso-scale Convective Complex) generated, devdoped, and regenerated.
Dignosis shows that the basic contributing factors caused the exceedingly heavy rain during August 4-5, 1993 in southern Shandong Province are as the following. Under the suitable circulation background as subtropical high intensified and spreaded westward,and the plateau trough moved eastwards with the southwest vortex,warm and wet air with southerly jet at the low layer were transported and reached over the stationary front (from west to east) in the front of the convergence core of the law vortex,and forced lifted, then, MCC (Meso-scale Convective Complex) generated, devdoped, and regenerated.
1994, 20(2):18-24.
DOI: 10.7519/j.issn.1000-0526.1994.2.003
Abstract:
The results are presented of a comprehensive observational analysis of physical and chemical characteristics of precipitation within the warm sector of a quasi-stationary front in South China.It is found that(1) inside the warm sector the mild raindrop concentration in the cumulus rainfall is associated with reasonably large drop diameter, with spectral pattern dominated by multiple peaks; (2) the pH value of the rainwater is low,averagihg at 4. 43,and NO,Cl-,SO,NH and Na+ are highly concentrated among the compositions of ions; (3) the scavenging rate for this rainfall is 45 % of the total mass of aerosols,especially higher for Cl-,F- and NO;(4) because the scavenging rate is large for the anion (mainly NO) and small for the cation in the aerosols,the pH value is decreased,becoming one of the causes for the relatively higher acidity in the rainwater in this process of precipitation.
The results are presented of a comprehensive observational analysis of physical and chemical characteristics of precipitation within the warm sector of a quasi-stationary front in South China.It is found that(1) inside the warm sector the mild raindrop concentration in the cumulus rainfall is associated with reasonably large drop diameter, with spectral pattern dominated by multiple peaks; (2) the pH value of the rainwater is low,averagihg at 4. 43,and NO,Cl-,SO,NH and Na+ are highly concentrated among the compositions of ions; (3) the scavenging rate for this rainfall is 45 % of the total mass of aerosols,especially higher for Cl-,F- and NO;(4) because the scavenging rate is large for the anion (mainly NO) and small for the cation in the aerosols,the pH value is decreased,becoming one of the causes for the relatively higher acidity in the rainwater in this process of precipitation.
1994, 20(2):25-27.
DOI: 10.7519/j.issn.1000-0526.1994.02.004
Abstract:
A method of classifying climatic regions of agrometeorological yeild in Shandong Province with clustering analysis is introduced. Taking into account not only the effects of agricultural climatic condition within each region but also the productive levels as well as the administrative divisions. This method makes the results of agricultural yeild forecasts more concrete,accurate and convenient.
A method of classifying climatic regions of agrometeorological yeild in Shandong Province with clustering analysis is introduced. Taking into account not only the effects of agricultural climatic condition within each region but also the productive levels as well as the administrative divisions. This method makes the results of agricultural yeild forecasts more concrete,accurate and convenient.
1994, 20(2):28-32.
DOI: 10.7519/j.issn.1000-0526.1994.02.005
Abstract:
In view of the vocational work undertaken by the meteorological stations at prefectural level,a computerized "three-in-one" weather forecast and service system is developed. Through the above-metioned system, weather information will be speedily received from the meteorological stations at higher levels,prompt and satisfactory weather service and instructions could be provided to the relevant units and individuals,the grassroots meteorological stations. Thus weather stations at prefectural level will play a greater role in economic construction and disaster prevention.
In view of the vocational work undertaken by the meteorological stations at prefectural level,a computerized "three-in-one" weather forecast and service system is developed. Through the above-metioned system, weather information will be speedily received from the meteorological stations at higher levels,prompt and satisfactory weather service and instructions could be provided to the relevant units and individuals,the grassroots meteorological stations. Thus weather stations at prefectural level will play a greater role in economic construction and disaster prevention.
1994, 20(2):33-36.
DOI: 10.7519/j.issn.1000-0526.1994.02.006
Abstract:
Based on data of the same time level,methods of quality control of the conventional data are discussed and a checking scheme is designed which could test all the data according to that of a particular point and could proceed from the surface to the inner essence. Some skills are also shown for how to perform the scheme on a computer. It is emphasized that extremum check is the key to the quality control of the conventional data.
Based on data of the same time level,methods of quality control of the conventional data are discussed and a checking scheme is designed which could test all the data according to that of a particular point and could proceed from the surface to the inner essence. Some skills are also shown for how to perform the scheme on a computer. It is emphasized that extremum check is the key to the quality control of the conventional data.
1994, 20(2):37-39.
DOI: 10.7519/j.issn.1000-0526.1994.2.007
Abstract:
The features,thinking of design,the conditions of operation of an auto-system of forecasting norther over the Bohai Sea and the Huanghai Sea,as well as its effects,are introduced.
The features,thinking of design,the conditions of operation of an auto-system of forecasting norther over the Bohai Sea and the Huanghai Sea,as well as its effects,are introduced.
1994, 20(2):40-43.
DOI: 10.7519/j.issn.1000-0526.1994.2.008
Abstract:
Analysis shows the seriousness of the powdery mildew of winter wheat in the Huaibei area,Anhui Province, depends on some climatic factors, such as sunshine-hour, precipitation, rainy day,and daily mean relative humidity,etc., A equation for forecasting how serious powdery mildew of winter wheat is obtained with multiple correlation analysis and its historical fitting probability is 91.7%.
Analysis shows the seriousness of the powdery mildew of winter wheat in the Huaibei area,Anhui Province, depends on some climatic factors, such as sunshine-hour, precipitation, rainy day,and daily mean relative humidity,etc., A equation for forecasting how serious powdery mildew of winter wheat is obtained with multiple correlation analysis and its historical fitting probability is 91.7%.
1994, 20(2):44-46.
DOI: 10.7519/j.issn.1000-0526.1994.02.009
Abstract:
Assessing of climatic impact on electricity demands in 1988、1989 and 1990 in Nanchang shows that electricity demands responsed sensitively when temperature fluctuation was great and in the long duration of high temperature. Analyses of both"climate-load" regression models and sensitivity have instructive effects on decision making in electricity distribution.
Assessing of climatic impact on electricity demands in 1988、1989 and 1990 in Nanchang shows that electricity demands responsed sensitively when temperature fluctuation was great and in the long duration of high temperature. Analyses of both"climate-load" regression models and sensitivity have instructive effects on decision making in electricity distribution.
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ISSN:1000-0526 CN:11-2282/P