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| 2009年盛夏湖南持续高温干旱及同期大气环流异常分析 | |
| 引用本文： | 罗伯良,彭莉莉,张超. 2009年盛夏湖南持续高温干旱及同期大气环流异常分析[J]. 干旱气象, 2010, 28(1): 20-25 |
| 作者姓名： | 罗伯良 彭莉莉 张超 |
| 作者单位： | 湖南省气象科学研究所,湖南,长沙,410007;湖南省气象科学研究所,湖南,长沙,410007;湖南省气象科学研究所,湖南,长沙,410007 |
| 基金项目： | 湖南省重大科技专项“湖南省极端气象灾害预警评估技术体系研究与示范”(2008FJ1006)资助 |
| 摘 要： | 利用湖南省97个台站降水、气温资料、NCEP/NCAR再分析资料,分析了2009年8月湖南持续高温干旱的时空分布及同期大气环流的异常特征。结果表明:高温时段从8月中旬初开始一直持续到下旬后期,其中8月中旬到下旬高温范围和持续时间大部分地区为1959年以来最严重的时段。西太平洋副热带高压面积偏大、强度偏强、西伸脊点偏西,湖南地区在副高控制下,盛行下沉气流是引起持续高温干旱的直接原因。从南海到湖南地区存在经向水汽输送的负异常中心,这种水汽输送形势有利于持续高温干旱的发展。 |
| 关 键 词： | 持续高温 大气环流 水汽输送 异常 |
Persistent High Temperature and Drought Feature and Anomalies of Atmospheric Circulation in August 2009 in Hu'nan Province |
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| LUO Boliang,PENG Lili,ZHANG Chao. Persistent High Temperature and Drought Feature and Anomalies of Atmospheric Circulation in August 2009 in Hu'nan Province[J]. Journal of Arid Meteorology, 2010, 28(1): 20-25 | |
| Authors: | LUO Boliang PENG Lili ZHANG Chao |
| Affiliation: | Institute of Meteorological Sciences of Hu'nan Province;Changsha 410007;China |
| Abstract: | The spatial-temporal distribution of the persistent high temperature and drought occurred in Hu'nan in August 2009 and the anomalous atmospheric circulation are analyzed by using the daily precipitation and temperature data of 97 stations in Hu'nan and NCEP/NCAR reanalysis data.The results show that the persistent high temperature period started from early of the second ten days to late of the third ten days of August,and the coverage and duration of high temperature were strongest since 1959 in many parts ... |
| Keywords: | persistent high temperature atmospheric circulation water vapor transportation anomaly |
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