基于大气层结和雷暴演变的闪电和降水关系  

Relationship Between Lightning and Precipitation Based on Classification of Atmospheric Stratification and Development of Thunderstorm

作　　者：王婷波 郑栋[2] 张义军[2] 姚雯[2] 张文娟[2] 

机构地区：[1]成都信息工程学院,成都610225 [2]中国气象科学研究院,北京100081

出　　处：《应用气象学报》2014年第1期33-41,共9页Journal of Applied Meteorological Science

基　　金：国家自然科学基金项目(41005006;41030960);国家科技支撑计划项目(2008BAC36B04);中国气象科学研究院基本科研业务费专项(2013Z006)

摘　　要：选取2006—2008年发生在北京及其周边地区的28次雷暴过程,基于大气不稳定度参数和雷达参量对雷暴过程进行分类,分析了不同分类条件下的总闪电活动(SAFIR3000三维闪电定位系统观测)和对流降水(雷达反演)的关系。结果表明:整体而言,总闪对应降水量的平均值为1.92×10~7kg·fl^(-1)。依据对流有效位能和抬升指数对雷暴进行分类的分析表明,较强的不稳定状态对应了较小的总闪对应降水量,同时总闪频次和对流降水量的相关性更好。基于雷达特征参数的分类分析表明,总闪对应降水量在对流运动较弱情况下最小,其次是对流运动较强的情况下,而对流运动适中时最大。A total of 28 thunderstorms occurring in and around Beijing area from 2006 to 2008 are picked to in- vestigate the relationship between total lightning （observed by SAFIR3000） and convective precipitation （by radar inversion）. These cases are classified according to parameters of the atmospheric stratification where they are generated and the reflectivity of radar. The quantitative results can provide a reference for the applications of lightning data on severe weather warning and precipitation estimation. The forecast can also be improved by assimilating the relationship between the hydrometeors and the activities to the numerical prediction models. The analysis can extend the application field of the data. ghtning ghtning ghtning mospheric stratification tends to be associated with smaller precipitation and more pronounced correlation between total lightning and precipitation. Of which, the classification of EcaP no less than 1600 J· kg-1 has the correlation coefficient of 0. 837, the total lightning frequency can be used to calculate the amount of convective precipitation with the equation of R= （1. 620× 10^8） ＋（5. 478× 106） F. While the classification of IL no less than 4 K has the correlation coefficient of 0. 853, the total lightning frequency can be used to calculate the area of the amount of convective precipitation with the equation of R= （1. 530 × 108） ＋（6. 276 × 106）F. Another three parameters calculated from radar reflectivity, i. e., maximum height of 20 dBZ re- flectivity, maximum reflectivity at 12 km level, and volume ratio of the reflectivity larger than 30 dBZ a- bove 0℃ to the reflectivity larger than 40 dBZ above 0℃, in terms of their radar volume scans. The most pronounced relationships between lightning and precipitation occur in the classification of H20dBz 11. 5 km, 25 dBZ ~fn km^35 dBZ, and V40/30%0. 39, when the correlation coefficients are 0. 804, 0. 609 and 0. 750, respectively. The linear correlation between lightning and precipitation show obvious

关 键 词：闪电 降水 大气层结 雷达参量 

分 类 号：P427.3[天文地球—大气科学及气象学] P426.6