| 2014年两次路径相似热带气旋降水特征及其成因的对比 |
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| 引用本文： | 蒋贤玲,任福民,马柱国,蔡亲波.2014年两次路径相似热带气旋降水特征及其成因的对比[J].地球物理学报,2017,60(4):1305-1320. |
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| 作者姓名： | 蒋贤玲 任福民 马柱国 蔡亲波 |
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| 作者单位： | 1. 中国科学院大气物理研究所东亚区域气候-环境重点实验室, 北京 100029;
2. 中国科学院大学, 北京 100049;
3. 中国气象科学研究院灾害天气国家重点实验室, 北京 100081;
4. 海南省气象台, 海口 570203 |
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| 基金项目： | 国家自然基金面上项目（41375056）,国家科技支撑计划项目（2013BAK05B03）,海南省气象局科研项目（HNQXQN201402）,中国气象局预报员专项项目（CMAYBY2015-058）资助. |
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| 摘 要： | 利用NASA的MERRA再分析数据、台站降水资料、热带气旋最佳路径数据集和雷达资料初步对比探讨了2014年两次路径相似台风（"威马逊"和"海鸥"）的降水特征及其成因.结果表明,两者台站过程降水和最大日降水强度差异明显;在华南产生的过程降水和日降水均表现出明显的非对称性,最强均在海南岛;在海南岛产生的过程降水、日降水和最大小时降水最强均在海南岛西部和北部.与"海鸥"相比,在强降水时段,"威马逊"产生更大台站日降水的原因之一是其自身更强的强度和偏慢的移动速度,而且还与高层更强的南亚高压主体、中层偏弱偏东的副热带高压和低层强的低空急流密切相关.在强降水阶段,两者所处的环境风垂直切变均指向西南偏西-西南偏南方向,而强的对流均主要在环境风垂直切变的左侧或前侧.两者强降水主要在海南岛西部和北部的关键原因是五指山山脉和台风路径的相对位置配置类似,强降水区恰好处于向岸风面或五指山的迎风面.
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| 关 键 词： | 路径相似 热带气旋 海南岛 降水特征 成因 |
| 收稿时间： | 2016-06-13 |
Rainfall characteristic and cause comparison of two track-similar tropical cyclones in 2014 |
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| JIANG Xian-Ling,REN Fu-Min,MA Zhu-Guo,CAI Qin-Bo.Rainfall characteristic and cause comparison of two track-similar tropical cyclones in 2014[J].Chinese Journal of Geophysics,2017,60(4):1305-1320. |
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| Authors: | JIANG Xian-Ling REN Fu-Min MA Zhu-Guo CAI Qin-Bo |
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| Institution: | 1. Key Laboratory of Regional Climate-environment for Temperate East Asia of Chinese Academy of Sciences, Institute of Atmospheric Physics, Beijing 100029, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. State Key Laboratory on Severe Weather, Chinese Academy of Meteorological Sciences, Beijing 100081, China;
4. Hainan Meteorological Observatory, Haikou 570203, China |
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| Abstract: | Rainfall characteristics and causes of two track-similar tropical cyclones (TCs) (Typhoon Rammasun and Typhoon Kalmageg) in 2014 are compared using NASA's MERRA Reanalysis data, station daily precipitation data, Shanghai Typhoon Institute TC best track data and Doppler radar data. Intensities of station process rainfall and station maximum daily rainfall showed significant differences between Typhoon Rammasun and Typhoon Kalmageg. Both process rainfall and daily rainfall in the South China showed obvious asymmetry, with the strongest in the Hainan Island. Station process rainfall, daily rainfall and maximum hourly rainfall in the Hainan Island were the strongest in western and northern region of the Hainan Island. Compared with Typhoon Kalmageg,during heavy rainfall period, stronger rainfall of Typhoon Rammasun closely associated with its stronger intensity and slower moving speed, as well as stronger South Asia High in upper troposphere, weaker northwest Pacific Subtropical High in middle troposphere, and stronger low-level jet. Heavy rainfall of the two TCs was in downshear or on the left side of the environment vertical wind shear which pointed from west-southwest to south-southwest during heavy rainfall period. Configurations of relative positions of the two TC tracks and the Wuzhi Mountain were key causes of stronger rainfall in western and northern region of the Hainan Island which was on the onshore flow sides of tracks or on the windward slopes of the Wuzhi Mountain. |
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| Keywords: | Track-similar Tropical cyclone The Hainan Island Rainfall characteristics Causes |
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