气象科学2011，Vol.31Issue(5)：652-658,7.
一次夏季雷暴天气过程中闪电活动特征分析
Analysis of lightning characteristics in a summer thunderstorm
摘要
Abstract
Based on the sounding data, Doppler weather radar products and lightning data, the temporal and spatial evolution characteristics of the thunderstorm in the Nanjing region on July 30, 2009 is presented. It is found that convective available potential energy Ecap is a better index in convection potential forecasting in comparison with 1k index etc. The reduction of 0 ℃ and - 10 ℃ temperature level is beneficial to the occurrence and development of the electrical activity in the thunderstorm. The negative lightning is predominant in comparison to positive lightning during the whole period. The increase of the lightning intensity corresponds to the higher flash rate. After each peak lightning, a lightning activity valley will appear. The comparison between location of lightning activity and radar echo shows that the development of the radar echo intensity corresponds to the evolution of flash rate and intensity. Negative lightning mainly clusters in the intensive echo region, while positive lightning usually scatters in the echo area with larger gradient. The characteristics of Doppler velocity PPI is better in order to reveal the mechanism of occurrence and development of lightning according to reflectivity PPI. AWR is the central area of heavy rain and lightning which also corresponds to the thunderstorm center region. It is helpful in the thunderstorm forecasting by the identification of AWR. It is feasible in describing the thermal characteristics and power characteristics of the lightning activity by Ekin index which is calculated by the radar data. The appearance of the Ekin peak value is ahead of the flash rate peak and the intensity peak value by a-bout 30 minutes which has the forecast ability in lightning and is worth further studying.关键词
闪电频数/零速度线/逆风区Key words
Lightning flash rate/Zero Doppler velocity contour/AWR分类
天文与地球科学引用本文复制引用
夏文梅,徐芬,慕熙昱,付志康,徐琪..一次夏季雷暴天气过程中闪电活动特征分析[J].气象科学,2011,31(5):652-658,7.基金项目
国家自然科学基金资助项目(40665001、40475017、40775029、40975013) （40665001、40475017、40775029、40975013）
中国气象局新技术推广项目(CMATG2008 M39) （CMATG2008 M39）
