Response of global lightning activity to air temperature variation

查看全文 作　　者：MA [1]Ming;TAO [1]Shanchang;ZHU [1]Baoyou;LUE [2]Weitao;TAN [1]Yongbo 机构地区：[1]School of Earth and Space Sciences, University of Science anti Technology of China, Hefei 230026, China;[2]Chinese Academy of Meteorological Sciences, Beijing 100081, China 出　　处：《Chinese Science Bulletin》索引2005年第50卷第22期,共5页 基　　金：This work was supported by the National Natural Science Foundation of China (Grant No. 40205002) ; the ChineseAcademy of Sciences (Grant No. KZCX2-201 ). 摘　　要：It is an issue of great attention but yet not very clear whether lightning activities increase or decrease on a warmer world. Reeve et al. presented that lightning activities in global land and the Northern Hemisphere land have posi- tive response to the increase of wet bulb temperature at 1000hPa. Is this positive response restricted only to wet bulb temperature or in land? What is the response of global light- ning activities (in both land and ocean) to the global surface air temperature variation like? This paper, based on the 5-year or 8-year OTD/LIS satellite-based lightning detecting data and the NCEP reanalysis data, makes a reanalysis of the response of the global and regional lightning activities to temperature variations. The results show that on the inter- annual time scale the global total flash rate has positive re- sponse to the variation in global surface air temperature, with the sensitivity of 17±7% K?1. Also, the seasonal mean flash rate of continents all over the world and that of conti- nents in the Northern Hemisphere have sensitive positive response to increase of global surface air temperature and wet bulb temperature, with the sensitivity of about 13±5% K?1, a bit lower than estimation of 40% K?1 in Reeve et al. However, the Southern Hemisphere and other areas like the tropics show no significant correlation. 关 键 词：OTD IAS 闪电活跃性 气候变化 温度变化 灵敏度