| 热带太平洋5月份上层洋流的动力统计诊断 |
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| 引用本文： | 卢姁,张东凌.热带太平洋5月份上层洋流的动力统计诊断[J].热带海洋学报,2009,28(2). |
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| 作者姓名： | 卢姁 张东凌 |
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| 作者单位： | 1. 中国人民解放军理工大学气象学院大气环流与短期气候预测研究室,江苏,南京211101
2. 中国科学院大气物理研究所国际气候与环境科学中心,北京,100029 |
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| 基金项目： | 国家重点基础研究发展规划(973计划) |
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| 摘 要： | 利用复EOF分析,将热带太平洋5月份的上层洋流看作一个整体,对其作了动力统计诊断,用以考察热带太平洋5月份上层流场的年际和年代际变化,并揭示其与长江流域梅雨异常的关系.结果表明,热带太平洋5月份上层偏差流的前三模态均为赤道所俘获;其第一、二模态具有明显的年际变化;第一模态与长江流域梅雨异常密切相关;第二模态与ENSO密切相关;第一模态其模的振幅有由小到大的年代际周期变化,且从1994年起模有越变越大的趋势,这表明这段时期长江流域梅雨降水量的异常有所增大.
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| 关 键 词： | 统计诊断 热带太平洋 上层洋流 长江流域 复EOF分析 |
A statistical diagnosis of upper-ocean currents in tropical Pacific Ocean in May |
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| LU Xu,ZHANG Dong-ling.A statistical diagnosis of upper-ocean currents in tropical Pacific Ocean in May[J].Journal of Tropical Oceanography,2009,28(2). |
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| Authors: | LU Xu ZHANG Dong-ling |
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| Institution: | 1.Laboratory of Atmosphere Circulation and Short-term Climate Prediction;Institute of Meteorological;PLA Univ.of Sci.& Tech.;Nanjing 211101;China;2.International Centre for Climate and Environment Sciences;Institute of Atmospheric Physics;CAS;Beijing 100029;China |
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| Abstract: | A CEOF() analysis was carried out in order to study the inter-decadal and decadal variations of the upper-ocean currents in the tropical Pacific Ocean and to unveil their relationship with the abnormal changes of the Meiyu in the Changjiang Valley.The authors find that the first three modes of the anomalous currents are equatorial-trapped.There are obvious inter-decadal variations in the first two modes.The first mode has a close relationship with abnormal precipitation during the Meiyu in the Changjiang Va... |
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| Keywords: | statistical diagnosis tropical Pacific Ocean ocean current Changjiang Valley CEOF analysis |
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