| 2003年7月西太平洋副热带高压变异及中国南方高温形成机理研究 |
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| 引用本文： | 林建,毕宝贵,何金海.2003年7月西太平洋副热带高压变异及中国南方高温形成机理研究[J].大气科学,2005,29(4):594-599. |
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| 作者姓名： | 林建 毕宝贵 何金海 |
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| 作者单位： | 中国气象局国家气象中心,北京,100081;南京气象学院,南京,210044 |
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| 基金项目： | 国家自然科学基金;北京市自然科学基金 |
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| 摘 要： | 运用全型垂直涡度倾向方程理论, 研究了空间非绝热加热在垂直方向的变化对2003年7月副高强度和位置变异的影响.结果表明: 副热带地区的非绝热加热对副高的强度和位置的变化有极其重要的影响.与气候平均状况相比较, 2003年7月副高北侧、西侧非绝热加热的垂直变化异常偏强, 而南侧、东侧较常年异常偏弱.这种异常的非绝热加热状况导致我国江南到副热带西太平洋地区呈现带状的异常反气旋性涡度制造, 使得7月副高偏强偏西.
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| 关 键 词： | 副热带高压 非绝热加热 全型垂直涡度倾向方程 |
| 文章编号： | 1006-9895(2005)04-0594-06 |
Physical Mechanism Responsible for Western Pacific Subtropical High Variation and Hot Wave in Southern China in July 2003 |
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| LIN Jian,BI Bao-Gui and HE Jin-Hai.Physical Mechanism Responsible for Western Pacific Subtropical High Variation and Hot Wave in Southern China in July 2003[J].Chinese Journal of Atmospheric Sciences,2005,29(4):594-599. |
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| Authors: | LIN Jian BI Bao-Gui and HE Jin-Hai |
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| Abstract: | The impact of spatially nonuniform heating on the formation and variation in Western Pacific Subtropical High (WPSH) in July 2003 is discussed on the basis of the complete form of vertical vorticity tendency equation by using NCEP/NCAR reanalysis dataset. Results show that vertical diabatic heating plays a dominant role in the variation in intensity and location of WPSH in July 2003. Vertical variations in nonuniform heating in the north and west of WPSH center are anomalously strong, while anomalously weak in the south and east of WPSH center. Such anomalous nonuniform heating generates the powerful anticyclone vorticity over the south of the Yangtze River and the western Pacific, which is greatly favorable for the enhancement and more-westward extension of WPSH. |
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| Keywords: | western pacific subtropical high diabatic heating complete form of vertical vorticity tendency equation |
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