Analysis and Zoning on Vulnerability of the Lightning Disaster in Guizhou Province

[ Objective] The research aimed to evaluate vulnerability of the lightning disaster in Guizhou and conduct zoning. [ Method] According to data of the lightning monitoring network and statistical data of the lightning disaster in Guizhou during 2007 -2012, by combining economy and population situations in 9 cities of Guizhou, 6 indicators were used to assess vulnerability of the lightning disasterCG lightning intensity, strong CG lightning intensity, annual average occurrence frequency of the lightning disaster, GDP per capita, population intensity and casualties frequency. By constructing principal component, determining weighing and comprehensive assessment, vulnerability grade of the lightning disaster in Guizhou was divided. [ Result] Guiyang was extremely high vulnerability zone, high vulnerability zone included Zunyi, Bijie and Liupanshui, moderate vulnerabili- ty zone included Anshun, Tongren and Qianxinan, Qiannan was low vulnerability zone, and Qiandongnan was extremely low vulnerability zone. Vulnerability distribution boundary of the lightning disaster in Guizhou was along northeast to southwest, and vulnerability of the lightning disaster gradually weakened from northwest to southeast. [ Conclusion] The research provided scientific basis for preventing lightning disaster and reducing damage of the lightning disaster.

Quantitative Characteristics Analysis of FY4A Satellite Products during a Thunderstorm Weather Process

Based on the lightning monitoring and FY4A satellite data in 12 periods during a thunderstorm,the relationship between lightning activity and four satellite digital products:blackbody radiation brightness temperature(TBB),cloud top temperature(CTT),cloud top height(CTH)and cloud top pressure(CTP)was quantitatively analyzed.The following conclusions were obtained:(1)at lightning location,90.5%of TBB values were less than 214.1 K;88.5%of CTT values were less than 207.7 K;88.5%of CTP values were less than 137.7 hPa,and 88.5%of CTH values were greater than 14872 m.At location without lightning,92.5%of TBB values were greater than 214.1 K;90.4%of CTT values were greater than 207.7 K;89%of CTP values were greater than 137.7 hPa,and 92%of CTH values were less than 14872 m.(2)Lightning activity was concentrated in the cloud area with TBB between 190-210 K,CTT between 185-210 K,CTP between 50-150 hPa and CTH between 12-18 km.Lightning intensity was roughly positively correlated with TBB,CTT and CTP,and negatively correlated with CTH.With the increase of CTH,lightning intensity decreased.(3)TBB,CTT,CTP and CTH can well indicate the location and activity frequency of lightning in thunderstorm weather.