| 我国近海热带气旋强度突变的气候特征分析 |
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| 引用本文： | 冯锦全,陈多.我国近海热带气旋强度突变的气候特征分析[J].热带气象学报,1995,11(1):35-42. |
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| 作者姓名： | 冯锦全 陈多 |
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| 作者单位： | 福建省气象科学研究所,福建省气象局 |
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| 基金项目： | 福建省科委“关于9012号台风几个特殊问题的研究”攻关项目 |
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| 摘 要： | 利用２．５×２．５格距的风场及气压资料,计算分析９０１２号热带气旋登陆后维持６５小时不消的各标准时次的角动量收支。得到的结果是：９０１２号热带气旋登陆后,进入一个相对稳定的鞍型场的中心,低层有西南风急流将大量潮湿空气卷入热带气旋,为其提供充足的潜热能,北侧弱冷空气的侵入,为其提供了斜压能量;而对流层上部气旋４°－８°半径上的地转角动量的涡旋输送及β项产生的气旋角动量的输入,则是气旋中心气压和最大风速维持的直接因素。
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| 关 键 词： | 热带气旋 角动量输送 动力机制 |
| 收稿时间： | 1993/10/20 0:00:00 |
| 修稿时间： | 9/7/1994 12:00:00 AM |
ANALYSES OF CLIMATIC CHARACTERISTICS ACCOMPANYING SUDDEN INTENSITY CHANGES IN OFFSHORE TROPICAL CYCLONES IN CHINA |
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| Feng Jinquan and Chen Duo.ANALYSES OF CLIMATIC CHARACTERISTICS ACCOMPANYING SUDDEN INTENSITY CHANGES IN OFFSHORE TROPICAL CYCLONES IN CHINA[J].Journal of Tropical Meteorology,1995,11(1):35-42. |
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| Authors: | Feng Jinquan and Chen Duo |
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| Institution: | Guangzhou Central Meteoroloigical Observatory, Guangzhou, 510080;Guangzhou Central Meteoroloigical Observatory, Guangzhou, 510080 |
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| Abstract: | Following criteria of sudden intensity changes in offshore tropical cyclones proposed by the experts of key projects office for the"8th five-year plan"in the national bureau,elassification statistics is done for the tropical cyclones in offshore Chinese waters 1970 through 1991 which meet the requirement.They all have the following climatic characteristics.There are in average 8-9 tropical cyclones per year whose intensity change abruptly as they move towards the offshore,among which 79.6% of the total weaken May through December while 20.4% intensity May through October;the former appears over vast area,while the latter is monthly seen over waters offshore the Zhejiang and Fujian Provinces,the central South China Sea,waters from the Pearl River Mouth across the Beibuwan Bay,and eastern Bashi Channel;No tropical cyclones enchance north of 30°N and west of 125°E or in the eastern South China Sea. |
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| Keywords: | Long maintenance Angular momentum transport Spin-up or spin-down |
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