【作者】 钟元； 滕卫平； 滕舟； 胡波； 黄新晴； 董美莹；

【Author】 ZHONG Yuan 1,TEN Wei-ping 1,TEN Zhou 2, HU Bo 3 ,HUANG Xing-qing, DONG Mei-ying 1 ,(1.Zhejiang Institute of Meteorology,Hangzhou Zhejiang,310017,China; 2.Zhejiang Meteorological Information Center , Hangzhou Zhejiang,310017,China; 3.Zhejiang Meteorological Observatory,Hangzhou Zhejiang,310017,China.)

【机构】 浙江省气象科学研究所； 浙江省气象信息中心； 浙江省气象台；

【摘要】 应用合成分析及相关分析方法研究了影响热带气旋登陆后转向入海路径趋势的若干因素,结果表明:登陆后转向入海路径趋势随时间和登陆地点的变化分布说明热带气旋登陆后路径仍受基本气流的引导和制约;热带气旋登陆时的惯性和和地转力的变化对热带气旋登陆后的路径趋势有一定影响;环境场对热带气旋登陆后转向入海路径有较大影响,尤其对流层中层流场对登陆后的热带气旋的移动仍有明显的引导作用;中国东部至黄海区域是环境场影响热带气旋登陆后转向入海路径趋势的关键区,当区域内西北太平洋副热带高压加强西伸,西风槽北撤,则热带气旋登陆后在副高南侧东风气流引导下向内陆西行至消亡,当区域内副高减弱东退,西风槽南压,则热带气旋登陆后受副高西侧偏南气流与西风槽前西南气流引导转向入海;登陆后18-36小时是转向入海路径趋势受环境场影响的敏感时段。更多还原

【Abstract】 The composite and correlation analyses are carried out in this paper to study major factors affecting the track of tropical cyclones(TCs) after their landfall in Eastern China.The mid-tropospheric environmental guiding flow is found to dominate the movement of a TC even after its landfall,with the inertia and Coriolis force two other subordinates.A key region is discovered covering the east of China and Yellow Sea,in which the environmental flow significantly affects the movement of TCs making landfall in Eastern China.When the subtropical high in this region strengthens and extends westward,accompanied by northward shrink of the westerly trough,the TC tends to move westward after landfall and disappear inland.However,when the subtropical high in this region weakens and shrinks eastward,accompanied by southward push of the westerly trough,the TC tends to recurve after landfall and re-enter the sea at a location to the north of the landfall point.The environment before the landfall of a TC has little impact on its post-landfall track,which is sensitive to the environmental change 18 – 36 hours after landfall.更多还原