| 冬季黑潮暖流区加热异常对东亚副热带西风急流影响的数值研究 |
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| 引用本文： | 况雪源,张耀存,刘健,等.冬季黑潮暖流区加热异常对东亚副热带西风急流影响的数值研究[J].大气科学,2009,33(1):81-89. |
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| 作者姓名： | 况雪源 张耀存 刘健 等 |
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| 作者单位： | 1.中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室, 南京,210008;广西气候中心, 南宁,530022 |
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| 基金项目： | 中国科学院知识创新工程重要方向项目KZCX2-YW-315、KZCX2-YW-319， 国家重点基础研究发展规划项目2004CB720200，国家自然科学基金项目40675041、40672210，中国科学院大气物理研究所大气科学和地球流体力学数值模拟国家重点实验室开放课题 |
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| 摘 要： | 通过对大气环流格点模式GAMIL性能的检验表明, 模式较好地再现了东亚地区大气环流型态、高空西风急流变化及表面加热场的季节变化。在此基础上, 设计敏感性试验研究了冬季西太平洋黑潮暖流关键区加热异常对高空西风急流影响, 数值试验结果表明冬季西太平洋黑潮暖流区加热正异常将引起东亚大槽偏东, 大陆冷高压、阿留申低压及位于低纬太平洋上的西太平洋副高均有所增强, 从而导致了冬季风环流加强。相应地, 东北太平洋上出现了明显的气旋差值环流, 而在中高纬大陆海洋交界地区出现反气旋式差值环流; 同时, 西风急流区南侧的低纬地区位势高度及温度场为正异常, 而北侧的中高纬地区为负异常, 这种分布将使得急流区经向气压梯度和南北温差加大, 导致急流的增强。模式结果分别从热力适应理论及热成风的角度验证了黑潮暖流区表面加热异常对急流的影响机理。
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| 关 键 词： | 黑潮暖流区 表面加热异常 东亚副热带西风急流 数值研究 |
A Numerical Study of the Effect of Anomalous Surface Heating in the Kuroshio Current Region in Winter on the East Asian Subtropical Westerly Jet |
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| KUANG Xueyuan,ZHANG Yaocun,LIU Jian.A Numerical Study of the Effect of Anomalous Surface Heating in the Kuroshio Current Region in Winter on the East Asian Subtropical Westerly Jet[J].Chinese Journal of Atmospheric Sciences,2009,33(1):81-89. |
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| Authors: | KUANG Xueyuan ZHANG Yaocun LIU Jian |
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| Institution: | 1.State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008;Guangxi Climate Center, Nanning 5300222.Department of Atmospheric Sciences, Nanjing University, Nanjing 2100933.State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008; |
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| Abstract: | The East Asian Subtropical Westerly Jet(EAWJ) is a narrow and strong westerly wind belt with large horizontal and vertical wind shears over the East Asian subtropical region,which is generally located at the north edge of the Western Pacific subtropical high.It plays a key role in linking weather systems over the mid-latitudes and low latitudes.Its northward jump is the signal of general circulation seasonal transition and the criteria for dividing the natural season of East Asia.Therefore,it is a meaningfu... |
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| Keywords: | Kuroshio Current region anomalous surface heating East Asian Subtropical Westerly Jet (EAWJ) numerical study |
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