| 摘要: |
| 本文对1982年以来我国东部海域登陆再发展台风进行统计分析，选取其中15个个例进行对比分析，根据其移动路径和增强幅度分为3类，研究表明：台风如果移向东北方向则再发展较弱，而向北移动则发展较深，且向北越深发展越强，这与副热带高压（副高）的位置和强度以及上游高空槽存在一定的关系（整体偏向于正相关），在北上的过程中，如果与高空正位涡发生耦合，则增强越大，但非绝热加热所占的比重越小。同时动能收支分布显示，台风加强越深，动能转换越强，两者成正比，但在能量转化的方向和位置上，三者又存在差异。 |
| 关键词: 变性 再发展 副热带高压 锋生函数 动能收支 |
| DOI：10.11693/hyhz20170500147 |
| 分类号:P732 |
| 基金项目:国家重点研发计划项目，2017YFC1404200号；山东省海洋生态环境与防灾减灾重点实验室开放基金项目，201406号。 |
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| STATISTICAL ANALYSIS OF DIFFERENT TYPES OF TYPHOON LANDED ON CHINA'S EASTERN COAST WITH RE-INTENSIFICATION AND EXTRATROPICAL TRANSITION |
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XIE Jun1, ZHU Xian-De1, GAO Da-Lu1,2, TIAN Tian3
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1.College of Oceanic and Atmospheric Sciences, Ocean University of China, Qingdao 266100, China;2.First institute of oceanography, Laboratory of Marine Science and Numerical Modeling, SOA, Qingdao 266061, China;3.North China Sea Data & Information Service, SOA, Qingdao 266061, China
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| Abstract: |
| We studied statistically the typhoons landed on China's eastern coast with re-intensification since 1982 and classified them into three types in terms of the path and re-intensification degree. The results show that typhoon re-intensification is weaker when moving northeastward then northward. The deeper and the more northern movement, the stronger the re-intensification would be, which is related to the position and the strength of the subtropical high and the upper trough (tends to have a positive correlation in general). In addition, during the progress of going northward, the re-intensification would be stronger if coupled with high altitude potential vorticity, and diabatic heating accounted for a small proportion. As shown in kinetic energy budget distribution, the greater the kinetic transfer, the stronger the re-intensification, showing a positive correlation. However, in the direction and location of energy conversion, the three types of typhoon present differences. |
| Key words: extratropical transition re-intensification subtropical high frontogenesis function kinetic energy budget |
