2008年1月26日南京暴雪中尺度风场结构双雷达反演研究  

STUDY ON THE MESOSCALE STRUCTURE OF A SNOWSTORM ON 26 JANUARY 2008 USING DUAL-DOPPLER

作　　者：周海光[1] 

机构地区：[1]中国气象科学研究院灾害天气国家重点实验室,北京100081

出　　处：《热带气象学报》2014年第4期786-794,共9页Journal of Tropical Meteorology

基　　金：国家自然科学基金项目(40975015)资助

摘　　要：由于冷暖空气持续交汇于长江中下游地区,2008年1月25—29日,南京地区普降大到暴雪。为揭示此次暴雪的形成机理和中尺度三维结构特征,利用南京-马鞍山双多普勒天气雷达时间同步体积扫描数据对1月26日的暴雪进行三维风场反演,研究了暴雪的三维动力结构。结果表明,此次暴雪的低层有β中尺度气旋性切变线和β中尺度涡旋活动,有利于气流抬升和水汽辐合,这对于降雪的维持和发展非常重要;中低层有较强烈的风垂直切变,这为暴雪的持续提供了动力条件。For a heavy snowstorm in Nanjing area during 25-29 January 2008,the three-dimensional wind field was retrieved with the synchronization volume data by dual-Doppler weather radars in Nanjing and Ma＇anshan on 26 January in order to investigate the 3D kinematic structure of the snowstorm.The retrieval result shows that there are β-mesoscale shear line and β-mesoscale vortex under the level of 1.5 km.They play important roles in the water vapour convergence.The northeast wind prevails at the low level while the southwest wind prevails above the 2.5 km height.The vertical wind shear at 2～2.5 km and the southwest jet stream above 3 km help maintain the snowstorm.The wind vertical shear is conducive to providing the kinematic condition.

关 键 词：中尺度气象学 暴雪 风场结构 双多普勒天气雷达 风场反演 

分 类 号：P445[天文地球—大气科学及气象学]