ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Volume 22,Issue 9,1996 Table of Contents
1996, 22(9):3-9.
DOI: 10.7519/j.issn.1000-0526.1996.9.001
Abstract:
Kinetic energy budgets were prepared for lower tropospheric jet stream accompaning storm rainfalls of two courses in 1993 and 1994,with the use of analyses from a limited-area fine-mesh model (100× 100km2,ten layers) as well as objective analysis system. It shows that the generation rate of kinetic energy (K) by pressure forces is always two-three orders bigger than change rate of K for every time. But the average generation rate as 200—206W/m2 respectively, and the former was a source of kinetic energy (characterized by a large-scale direct solenoidal circulation, the latter was a sink for subgrid-to grid-scale energy transfer,done by a indirect solenoidal circulation. So the kinetic energy changes of the small (subgrid-) scale flow (lead by storm motions) paralleled those of the large-scale flow. This indicates a need for considering the apparent phenomenon of negative viscosity in mesoscale numerical atmospheric modeling for prediction of storm rainfalls.
Kinetic energy budgets were prepared for lower tropospheric jet stream accompaning storm rainfalls of two courses in 1993 and 1994,with the use of analyses from a limited-area fine-mesh model (100× 100km2,ten layers) as well as objective analysis system. It shows that the generation rate of kinetic energy (K) by pressure forces is always two-three orders bigger than change rate of K for every time. But the average generation rate as 200—206W/m2 respectively, and the former was a source of kinetic energy (characterized by a large-scale direct solenoidal circulation, the latter was a sink for subgrid-to grid-scale energy transfer,done by a indirect solenoidal circulation. So the kinetic energy changes of the small (subgrid-) scale flow (lead by storm motions) paralleled those of the large-scale flow. This indicates a need for considering the apparent phenomenon of negative viscosity in mesoscale numerical atmospheric modeling for prediction of storm rainfalls.
1996, 22(9):10-14.
DOI: 10.7519/j.issn.1000-0526.1996.9.002
Abstract:
The atmospheric transparecy under atmospheric background polltion in East China is studied. The resuhs show that the characteristics of change of atmospheric transparecy in three wavelengths is mainly the same. The atmospheric transparecy is lower in May and Sep. and higher in Jan. ,July,Dec. ,and highest in 778nm and, lowest in 368nm. The attenuation function of aerosol particle is biggest in effects. The frequency paragraph idstribution present minor normal.
The atmospheric transparecy under atmospheric background polltion in East China is studied. The resuhs show that the characteristics of change of atmospheric transparecy in three wavelengths is mainly the same. The atmospheric transparecy is lower in May and Sep. and higher in Jan. ,July,Dec. ,and highest in 778nm and, lowest in 368nm. The attenuation function of aerosol particle is biggest in effects. The frequency paragraph idstribution present minor normal.
1996, 22(9):15-18.
DOI: 10.7519/j.issn.1000-0526.1996.9.003
Abstract:
The necessity of building remote sensing satellitic radiometric calibration site of China, the basic principle of radiometric calibration and the idea of building radiometric calibration site were described.
The necessity of building remote sensing satellitic radiometric calibration site of China, the basic principle of radiometric calibration and the idea of building radiometric calibration site were described.
1996, 22(9):19-21.
DOI: 10.7519/j.issn.1000-0526.1996.9.004
Abstract:
MFFRS is the service surface for users. With this system, remote users can view images and information of forest fire monitoring by satellite remote sensing rapidly. It provides reliable basis for forest fire prevention department to comprehend fire trends and put out a fire.
MFFRS is the service surface for users. With this system, remote users can view images and information of forest fire monitoring by satellite remote sensing rapidly. It provides reliable basis for forest fire prevention department to comprehend fire trends and put out a fire.
1996, 22(9):22-25.
DOI: 10.7519/j.issn.1000-0526.1996.9.005
Abstract:
According to data measured in fields during 1992 to 1994 ,the estimation method of accumulative photosynthesis by Logistic equation is presented. Not only it is of clear significance of biology and ecology,but also the method is simple, and the result is accurate. It is a simple, accurate and practical manner of calculating accumulative photosynthesis of wheat.
According to data measured in fields during 1992 to 1994 ,the estimation method of accumulative photosynthesis by Logistic equation is presented. Not only it is of clear significance of biology and ecology,but also the method is simple, and the result is accurate. It is a simple, accurate and practical manner of calculating accumulative photosynthesis of wheat.
1996, 22(9):26-30.
DOI: 10.7519/j.issn.1000-0526.1996.09.006
Abstract:
Based on 191 hail cloud echoes and variations obtained with a 711 radar in Jinan during June to August from 1976 to 1987 and the rader echo during June to August of 1989—1991 operational period by antihail gun in Pingyuan county,Dezhou district,the effect of hail suppression is evaluated. The results show that echo top altitude and its descent rate, bright belt of 0℃ layer and structures of radar echo are all varied obviously after the hail suppression operations. The analysis is aiming at propelling to develop the cause of hail suppression in Shandong provice and making greater contributions to decrease natural disasters.
Based on 191 hail cloud echoes and variations obtained with a 711 radar in Jinan during June to August from 1976 to 1987 and the rader echo during June to August of 1989—1991 operational period by antihail gun in Pingyuan county,Dezhou district,the effect of hail suppression is evaluated. The results show that echo top altitude and its descent rate, bright belt of 0℃ layer and structures of radar echo are all varied obviously after the hail suppression operations. The analysis is aiming at propelling to develop the cause of hail suppression in Shandong provice and making greater contributions to decrease natural disasters.
1996, 22(9):35-38.
DOI: 10.7519/j.issn.1000-0526.1996.9.009
Abstract:
Abnormal drought and flood disasters in the area between the Yangtze River and Huaihe River in the summer in 1991 and 1994 were observed respectively. They are caused by anomalous changes of the main general circulation systems in the Northern Hemisphere,such as the intensity and position of the polar vortex, long-wave trough and ridge in the westerlies, the west Pacific subtropical high at 500hPa,and South Asia high at 100hPa,as well as that of SST in the tropical ocean.
Abnormal drought and flood disasters in the area between the Yangtze River and Huaihe River in the summer in 1991 and 1994 were observed respectively. They are caused by anomalous changes of the main general circulation systems in the Northern Hemisphere,such as the intensity and position of the polar vortex, long-wave trough and ridge in the westerlies, the west Pacific subtropical high at 500hPa,and South Asia high at 100hPa,as well as that of SST in the tropical ocean.
1996, 22(9):39-41.
DOI: 10.7519/j.issn.1000-0526.1996.09.010
Abstract:
From the need of seasonal precipitation forecasts, using the precipitation data of 8 stations in Xiangxi region, the climatic feature and the evolution trend of precipitation during flood season from April to September have been analysed. These results are of important reference for precipitation forecast in flood season.
From the need of seasonal precipitation forecasts, using the precipitation data of 8 stations in Xiangxi region, the climatic feature and the evolution trend of precipitation during flood season from April to September have been analysed. These results are of important reference for precipitation forecast in flood season.
1996, 22(9):42-44.
DOI: 10.7519/j.issn.1000-0526.1996.09.011
Abstract:
The GMS cloud chart of the regional heavy torrential rain in Jiangsu Province at pre-flood season from 1980 to 1990 was analysed. The causes of torrential rain,its cloud features and the evolution were revealed,and the feature classification was made. The forecast point was presented.
The GMS cloud chart of the regional heavy torrential rain in Jiangsu Province at pre-flood season from 1980 to 1990 was analysed. The causes of torrential rain,its cloud features and the evolution were revealed,and the feature classification was made. The forecast point was presented.
1996, 22(9):45-47.
DOI: 10.7519/j.issn.1000-0526.1996.09.012
Abstract:
In view of the production practics, the meteorological condition that Chinese cabbage is frozen has been decided. Using 500hPa data of the pentad average height,the circulation pattern before and during the Chinese cabbage frozen has been analysed. The key-regions indicator has been given, and the forecast equation in relation to the Chinese cabbage frozen damage and the third and fourth pentad in November has been established.
In view of the production practics, the meteorological condition that Chinese cabbage is frozen has been decided. Using 500hPa data of the pentad average height,the circulation pattern before and during the Chinese cabbage frozen has been analysed. The key-regions indicator has been given, and the forecast equation in relation to the Chinese cabbage frozen damage and the third and fourth pentad in November has been established.
1996, 22(9):48-49.
DOI: 10.7519/j.issn.1000-0526.1996.09.013
Abstract:
No. 448ZM tower crashing accident in 500kV overhigh pressure transmission wire from Zou county electric plant to Zibo city was described,the weather condition causing the power interruption was analysed.
No. 448ZM tower crashing accident in 500kV overhigh pressure transmission wire from Zou county electric plant to Zibo city was described,the weather condition causing the power interruption was analysed.
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ISSN:1000-0526 CN:11-2282/P