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东亚经向型气压异常偶极模与冬季北太平洋关键区域海温的关系及其数值模拟试验

赵巧莲 李崇银 李琳

赵巧莲, 李崇银, 李琳. 东亚经向型气压异常偶极模与冬季北太平洋关键区域海温的关系及其数值模拟试验[J]. 气候与环境研究, 2013, 18(2): 232-242. doi: 10.3878/j.issn.1006-9585.2013.11170
引用本文: 赵巧莲, 李崇银, 李琳. 东亚经向型气压异常偶极模与冬季北太平洋关键区域海温的关系及其数值模拟试验[J]. 气候与环境研究, 2013, 18(2): 232-242. doi: 10.3878/j.issn.1006-9585.2013.11170
ZHAO Qiaolian, LI Chongyin, LI Lin. Relationship between the Meridional Dipole Mode of Sea Level Pressure Anomalies in Asia–Pacific Region and SST Anomalies in the Northwestern Pacific Determined by Sensitive Experiments with General Circulation Model[J]. Climatic and Environmental Research, 2013, 18(2): 232-242. doi: 10.3878/j.issn.1006-9585.2013.11170
Citation: ZHAO Qiaolian, LI Chongyin, LI Lin. Relationship between the Meridional Dipole Mode of Sea Level Pressure Anomalies in Asia–Pacific Region and SST Anomalies in the Northwestern Pacific Determined by Sensitive Experiments with General Circulation Model[J]. Climatic and Environmental Research, 2013, 18(2): 232-242. doi: 10.3878/j.issn.1006-9585.2013.11170

东亚经向型气压异常偶极模与冬季北太平洋关键区域海温的关系及其数值模拟试验

doi: 10.3878/j.issn.1006-9585.2013.11170
基金项目: 国家重点基础研究发展计划2007CB411805

Relationship between the Meridional Dipole Mode of Sea Level Pressure Anomalies in Asia–Pacific Region and SST Anomalies in the Northwestern Pacific Determined by Sensitive Experiments with General Circulation Model

  • 摘要: 进一步从资料分析和大气环流模式的敏感性试验, 对西北太平洋海温异常与亚太中高纬度地区冬季海平面气压异常经向偶极模的关系及影响进行了研究。资料分析表明, 对应冬季亚太地区海平面气压的经向(ME)型偶极模, 西北太平洋中高纬度海温异常的影响存在两个重要关键区。尤其是(40°N~55°N, 150°E~160°W)海区的海温异常与冬季东亚经向型气压偶极模指数IME有明显正相关, (20°N~35°N, 125°E~170°W)海区的海温异常与指数IME有明显负相关。而上述两个关键海区的SSTA对经向型振荡模的影响, 主要是通过热通量异常的作用。敏感性模拟试验清楚表明, 西北太平洋关键区的海温异常对亚洲—太平洋地区冬季海平面气压场的经向偶极模有一定影响。区域1(42°N~62°N, 145°E~165°W)的负异常相对于其自身的正异常来说, 对亚太地区海平面气压场的负经向偶极模贡献更大, 而区域2 [(22°N~42°N, 135°E~175°E)和(26°N~42°N, 175°E~170°W)]的正异常相对区域1的负异常来说对负经向偶极模的贡献更大一些。但是, 单独区域1的负异常海温和单独区域2的正异常海温影响下的海平面气压场响应的负经向偶极模都会有不同程度的位置偏移。当存在区域1的负异常海温和区域2的正异常海温相互匹配的情况下, 亚洲—太平洋地区冬季海平面气压场的负经向偶极模特征更为显著。
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  • 收稿日期:  2011-11-01
  • 修回日期:  2013-01-25

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