Based on the data of various types of strong convective weather in Shanghai from April and September during 1998- 2004,the temporal and spatial distribution of strong convective weather were analyzed. The results show...Based on the data of various types of strong convective weather in Shanghai from April and September during 1998- 2004,the temporal and spatial distribution of strong convective weather were analyzed. The results showed that the number of days with strong convective weather in Shanghai from April to September showed an increasing trend during 1998- 2009,and all kinds of strong convective weather appeared frequently from June to August; K index,SI index,Pwv,CAPE,TOT index,SWEAT,and θsedif85 had good indicating significance for the occurrence of strong convective weather such as thunderstorm gales,strong lightning,and hail.展开更多
Analytic method and identification direction for rational identification of lightning derivative disasters by strong convective weather monitoring data in southern China were introduced. Taking identification cases of...Analytic method and identification direction for rational identification of lightning derivative disasters by strong convective weather monitoring data in southern China were introduced. Taking identification cases of lightning disaster in Guangzhou Development Region as the background,according to the characteristics in the region that large high-precision enterprises were more,lightning derivative disasters occurred frequently in thunderstorm season,and the actual situation that time of the affected enterprise applying for lightning disaster scene identification lagged,combining Technical Specifications of Lightning Disaster Investigation（ QX / T103-2009）,qualitative analysis method of lightning derivative disaster was put forward under the weather condition of strong convection in southern China by using weather monitoring data（ Doppler sounding radar data,lightning positioning monitoring data,atmospheric electric field data,rainfall data,wind direction and force）,and was optimized by technical means（ ＂ metallographic method＂ and ＂ remanence law＂）. The research could put forward efficient and convenient analytical thinking and method for lightning derivative disaster,and further optimize accuracy and credibility of lightning disaster investigation.展开更多
To provide references for the forecast of strong convective weather process by county-level stations, through synoptic analysis, diagnostic analysis of physical quantities, analysis of satellite cloud pictures and new...To provide references for the forecast of strong convective weather process by county-level stations, through synoptic analysis, diagnostic analysis of physical quantities, analysis of satellite cloud pictures and new generation of weather radar data, the main reasons for the formation of strong convective weather process in Guannan County on May 16, 2012 was analysed based on the weather situation and physical quantities. The results show that this strong convective weather process occurred under conditions of inversion layer, upper dry and low-level wet climate, high- level convergence and low-level divergence, and unstable stratification, and surface cold front was the major factor triggering this strong convection. Besides, radar echo played an important role in the short-term impending forecast during the development of the weather. The occurrence of a strong convective weather is related to cold air activity, so we should strengthen the monitoring of cold air activity, so as to improve our waming lev- el and service capability to forecast strong convective weather.展开更多
[ Objective] The research aimed to analyze frost weather in southeast Jilin Province in August of 2009. [ Methed] Based on NECP rean- alysis data and routine observation data, by using analytic and diagnostic methods ...[ Objective] The research aimed to analyze frost weather in southeast Jilin Province in August of 2009. [ Methed] Based on NECP rean- alysis data and routine observation data, by using analytic and diagnostic methods of the synoptics, frost weather in southeast Jilin Province in Au- gust of 2009 was analyzed from circulation situation, weather factor characteristics and so on. [ Result] It was a strong cold air influence process with cold wave outbreak property. In prior period, high-altitude situation was stable, and it was high-temperature and rainless in Jilin. In later peri- od, polar vortex and big trough deepened and developed, and strong cold air went south. After big trough and cold front moved eastward, cold air erupted in the province. Generation condition of the frost weather in southeast Jilin Province was that East Asian big trough and strong cold front transited, and high altitude of Jilin Province was controlled by northwest airflow. 850 hPa temperature ≤4 ℃ in central east Jilin Province. Center intensity of the cold high reached 1 020 hPa, and it was just in central east Jilin Province. Control time of the cold air ≥36 h, and rainfall 〈10 mm in 48 h. [ Cendusion] Weather and factor conditions in the process had important significance for future frost weather forecast in summer.展开更多
文摘Based on the data of various types of strong convective weather in Shanghai from April and September during 1998- 2004,the temporal and spatial distribution of strong convective weather were analyzed. The results showed that the number of days with strong convective weather in Shanghai from April to September showed an increasing trend during 1998- 2009,and all kinds of strong convective weather appeared frequently from June to August; K index,SI index,Pwv,CAPE,TOT index,SWEAT,and θsedif85 had good indicating significance for the occurrence of strong convective weather such as thunderstorm gales,strong lightning,and hail.
文摘Analytic method and identification direction for rational identification of lightning derivative disasters by strong convective weather monitoring data in southern China were introduced. Taking identification cases of lightning disaster in Guangzhou Development Region as the background,according to the characteristics in the region that large high-precision enterprises were more,lightning derivative disasters occurred frequently in thunderstorm season,and the actual situation that time of the affected enterprise applying for lightning disaster scene identification lagged,combining Technical Specifications of Lightning Disaster Investigation（ QX / T103-2009）,qualitative analysis method of lightning derivative disaster was put forward under the weather condition of strong convection in southern China by using weather monitoring data（ Doppler sounding radar data,lightning positioning monitoring data,atmospheric electric field data,rainfall data,wind direction and force）,and was optimized by technical means（ ＂ metallographic method＂ and ＂ remanence law＂）. The research could put forward efficient and convenient analytical thinking and method for lightning derivative disaster,and further optimize accuracy and credibility of lightning disaster investigation.
基金Supported by the Open Foundation for Meteorological Research of Jiangsu Province,China (200712)Development Project of Meteorological Research of Jiangsu Province,China (200807)
文摘To provide references for the forecast of strong convective weather process by county-level stations, through synoptic analysis, diagnostic analysis of physical quantities, analysis of satellite cloud pictures and new generation of weather radar data, the main reasons for the formation of strong convective weather process in Guannan County on May 16, 2012 was analysed based on the weather situation and physical quantities. The results show that this strong convective weather process occurred under conditions of inversion layer, upper dry and low-level wet climate, high- level convergence and low-level divergence, and unstable stratification, and surface cold front was the major factor triggering this strong convection. Besides, radar echo played an important role in the short-term impending forecast during the development of the weather. The occurrence of a strong convective weather is related to cold air activity, so we should strengthen the monitoring of cold air activity, so as to improve our waming lev- el and service capability to forecast strong convective weather.
文摘[ Objective] The research aimed to analyze frost weather in southeast Jilin Province in August of 2009. [ Methed] Based on NECP rean- alysis data and routine observation data, by using analytic and diagnostic methods of the synoptics, frost weather in southeast Jilin Province in Au- gust of 2009 was analyzed from circulation situation, weather factor characteristics and so on. [ Result] It was a strong cold air influence process with cold wave outbreak property. In prior period, high-altitude situation was stable, and it was high-temperature and rainless in Jilin. In later peri- od, polar vortex and big trough deepened and developed, and strong cold air went south. After big trough and cold front moved eastward, cold air erupted in the province. Generation condition of the frost weather in southeast Jilin Province was that East Asian big trough and strong cold front transited, and high altitude of Jilin Province was controlled by northwest airflow. 850 hPa temperature ≤4 ℃ in central east Jilin Province. Center intensity of the cold high reached 1 020 hPa, and it was just in central east Jilin Province. Control time of the cold air ≥36 h, and rainfall 〈10 mm in 48 h. [ Cendusion] Weather and factor conditions in the process had important significance for future frost weather forecast in summer.
