| 我国南方洪涝暴雨期西太平洋副高短期位置变异的特点及成因 |
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| 引用本文： | 王黎娟,陈璇,管兆勇,等.我国南方洪涝暴雨期西太平洋副高短期位置变异的特点及成因[J].大气科学,2009,33(5):1047-1057. |
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| 作者姓名： | 王黎娟 陈璇 管兆勇 等 |
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| 作者单位： | 1.南京信息工程大学 气象灾害省部共建教育部重点实验室, 南京,210044 |
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| 基金项目： | 国家科技支撑计划项目2007BAC29B02;江苏省气象灾害重点实验室项目KLME060204;江苏省高校自然科学基础研究项目06KJB170050 |
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| 摘 要： | 利用NCEP/NCAR多年逐日再分析资料、美国环境预报中心CMAP (NOAA NCEP Climate Prediction Center Merged Analysis of Precipitation) 候平均降雨量资料以及全国740站逐日降水资料, 对华南前汛期和江淮梅雨期大范围持续性暴雨过程中西太平洋副高短期位置变异的异同及其可能成因进行了分析。结果表明: 华南和江淮大范围持续性暴雨期间, 西太平洋副高位置均比同期气候平均值异常偏南偏西, 且强度偏强。华南暴雨期间, 副高西北侧华南地区以及西侧孟加拉湾地区存在异常强烈的视热源和视水汽汇; 江淮暴雨期间, 副高北侧江淮流域及西侧孟加拉湾地区也存在异常强烈的视热源和视水汽汇。运用全型垂直涡度倾向方程理论, 研究非绝热加热对西太平洋副高短期位置变异的影响, 结果表明: 副高位置的短期变异与非绝热加热场及其配置有密切联系。华南暴雨期间, 副高西北侧边缘的华南地区加热场可在短期内迫使副高东撤南退; 江淮暴雨期间, 副高北侧江淮流域加热场的存在不利于副高北进, 而西侧较远处孟加拉湾热源会诱导副高西伸, 两者的共同作用导致副高在江淮以南维持, 且会明显西伸。
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| 关 键 词： | 华南 江淮 大范围持续性暴雨 西太平洋副高 非绝热加热 |
Features of the Short-Team Position Variation of the Western Pacific Subtropical High during the Torrential Rain Causing Severe Floods in Southern China and Its Possible Cause |
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| WANG Lijuan,CHEN Xuan,GUAN Zhaoyong.Features of the Short-Team Position Variation of the Western Pacific Subtropical High during the Torrential Rain Causing Severe Floods in Southern China and Its Possible Cause[J].Chinese Journal of Atmospheric Sciences,2009,33(5):1047-1057. |
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| Authors: | WANG Lijuan CHEN Xuan GUAN Zhaoyong |
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| Institution: | 1.Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science & Technology, Nanjing,2100442.Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science & Technology, Nanjing,210044; Wuhan Central Meteorological Observatory, Wuhan,430074 |
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| Abstract: | By using the NCEP/NCAR daily reanalysis data, NOAA NCEP Climate Prediction Center Merged Analysis of Precipitation (CMAP) pentad-mean precipitation data and daily precipitation data of 740 stations in China, the authors analyze the similarities and differences of the short-term position variation of the Western Pacific Subtropical High (WPSH) and its probable formation cause during large-scale continuous torrential rain in South China pre-flood period and the Changjiang-Huaihe River valley Meiyu period. Res... |
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| Keywords: | South China the Changjiang-Huaihe River valley large-scale continuous torrential rain western Pacific subtropical high diabatic heating |
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