大气科学2017，Vol.41Issue(6)：1221-1233,13.DOI:10.3878/j.issn.1006-9895.1707.17144
2016年6月23日江苏阜宁龙卷的高分辨快速更新同化预报与分析
High-Resolution Rapid Refresh Analysis and Prediction of the Tornado Occurring in Funing on 23 June 2016
摘要
Abstract
The tornado occurring on June 23 2016 in Funing County,Jiangsu Province was simulated using the operational Shanghai Meteorological Service-WRF ADAS Rapid Refresh System.The parent storm of the tornado was identified near Funing in the model output,which occurred in the area with very strong convective activities.Its development and timing agreed well with observations.However,the simulated vortex was 20 km north of its observed location with weaker surface winds.Further analysis indicated that a supercell was initialized within the updraft in the middle level prior to the occurrence of the storm,and extended upward and downward following the expansion of the updraft.With significantly enhanced updraft and increased z-helicity in the middle and upper levels,the x-helicity started to increase along with the intensified divergence in the upper level.In lower levels,the updraft and convergence both strengthened and the y-helicity increased.Following the weakening of divergence and updraft in the upper level,the cyclonic vortex eventually diminished and dissipated.In a comparative simulation without rapid data refresh,the supercell didn't exist,suggesting that the hourly data assimilation played a key role in successful simulation of the tornado.关键词
龙卷/数值预报/螺旋度/快速更新Key words
Tornado/Numerical prediction/Helicity/Rapid refresh分类
天文与地球科学引用本文复制引用
李佳,陈葆德,张旭,黄伟..2016年6月23日江苏阜宁龙卷的高分辨快速更新同化预报与分析[J].大气科学,2017,41(6):1221-1233,13.基金项目
国家重点研发计划“政府间国际科技创新合作”重点专项2016YFE0109700,国家自然科学基金项目41575101,41505087 National Key Research and Development Plan "Inter Governmental Cooperation in International Scientific and Technological Innovation" Key Projects (Grant 2016YFE0109700),National Natural Science Foundation of China (Grants 41575101,41505087) （Grant 2016YFE0109700）
