【作者】 狄利华； 姚学祥； 解以扬； 吕江津；

【Author】 Di Lihua1,2 Yao Xuexiang2 Xie Yiyang2 Lv Jiangjin2 1 NIM, Nanjing University of Information Science and Technology, Nanjing 210044 2 Tianjin Municipal Meteorological Bureau, Tianjin 300374

【机构】 南京信息工程大学气象学院； 天津市气象局；

【摘要】 利用地面和高空的实况观测资料、NCEP再分析资料以及FY-2C卫星云图资料,并通过中尺度Barnes滤波和物理量诊断分析,对“麦莎”台风变性过程进行了研究。结果表明:“麦莎”登陆北上的过程中,西北侧冷空气先随着“麦莎”环流由北向南旋转,尔后冷空气又从台风低压中心的偏南侧向北侵入,最终破坏“麦莎”的暖心结构,使台风变性。同时,由分析可见,在接近华北地区时,“麦莎”的云系发生分裂,分裂为东西两片,这两片云系的强度和高度截然不同,引起了不同性质的降水。更多还原

【Abstract】 By employing the actual observations of upper air and surface, NCEP reanalysis data and FY-2C satellite cloud image, by using the methods of mesoscale Barnes filtering and physical diagnosis, ‘MATSA’ is analyzed . The results show that during the process of ‘MATSA’ making the landfall and going northward, cold air of northwest rotates along with ‘MATSA’ circulation from north to south first, and then goes northward from the south of the center of typhoon low, destroys the warm center of ‘MATSA’ at last, inducing extratropical transition. Contemporarily, analysis indicates that the cloud system of ‘MATSA’ divide into west part and east one, when close to North China, and the intensity and height of these two parts of cloud are all different, thus the precipitation brought by them is distinct.更多还原