| 2003年夏季华南持续高温天气过程及热力诊断 |
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| 引用本文： | 方宇凌,简茂球.2003年夏季华南持续高温天气过程及热力诊断[J].热带海洋学报,2011(3). |
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| 作者姓名： | 方宇凌 简茂球 |
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| 作者单位： | 中山大学大气科学系/季风与环境研究中心;中山市气象局; |
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| 基金项目： | 国家重点基础研究发展计划项目(2009CB421404) |
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| 摘 要： | 利用华南观测的逐日最高气温资料和NCEP逐日再分析资料,对2003年6月29日—8月15日华南持续高温过程的大气环流背景、动力和热力条件进行了诊断分析。结果表明,2003年6月29日—8月15日华南大范围持续高温的前2段高温峰期与副高有关,第3段高温期大陆高压有关,而且3次高温过程都与热带气旋外围下沉气流有密切联系,而前2次持续高温的缓解都与热带气旋登陆和影响华南地区有密切联系。热力诊断发现,3段持续高温期间,近地层大气的局地增温主要是由非绝热加热作用(白天地表感热通量和地面长波辐射加热)造成的,水平温度平流对局地增温作用有负贡献。高温天气过程的晴空少云天气背景有利于白天太阳辐射加热地面,并可造成明显的地面感热通量和地面长波辐射加热近地面层大气,从而导致了持续高温天气过程。
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| 关 键 词： | 持续高温 诊断 非绝热加热 华南 |
Diagnosis study of persistent heat waves in South China during summer 2003 |
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| FANG Yu-ling,JIAN Mao-qiu .Research Center for Monsoon , Environment.Diagnosis study of persistent heat waves in South China during summer 2003[J].Journal of Tropical Oceanography,2011(3). |
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| Authors: | FANG Yu-ling JIAN Mao-qiu Research Center for Monsoon Environment |
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| Affiliation: | FANG Yu-ling1,2,JIAN Mao-qiu1 1.Research Center for Monsoon and Environment and Department of Atmospheric Sciences,Sun Yat-sen University,Guangzhou 510275,China,2.Zhongshan Meteorological Observatory,Zhongshan 528401 |
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| Abstract: | Based on the observational data(daily maximum surface air temperature over South China) and the NCEP/NCAR reanalysis data,three persistent extreme heat waves in the summer of 2003 are examined in terms of atmospheric circulation background and thermal dynamic conditions.It is found that these three persistent heat wave periods occurred in South China were related to the western Pacific subtropical high,the subtropical continental high,and sinking motion of upper outflow of tropical cyclone.The termination o... |
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| Keywords: | persistent heat wave diagnosis diabatic heating South China |
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