Teleconnective response of the Pacific-North American region atmosphere to large central equatorial Pacific SST anomalies
Teleconnective response of the Pacific-North American region atmosphere to large central equatorial Pacific SST anomalies
复制标题
太平洋-北美地区大气对赤道中太平洋大海温异常的遥相关响应
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
Arun Kumar
中科院分区：
文献类型：
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作者：
R. E. Livezey;M. Masutani;A. Leetmaa;H. Rui;M. Ji;Arun Kumar
在美国国家气象局用于业务季节预报的环流模式的20年整合中，观测到全球海表温度（SST）异常场对1992年1月（厄尔尼诺-南方涛动大暖期高峰附近）的显著全年集合响应。这促使对赤道中部太平洋和太平洋-北美地区700 hpa高度的强海温异常与美国地表温度和降水之间的遥相关进行详细的观测重新评估。所采用的方法是根据赤道太平洋中部关键区域海温异常大而正或大而负的情况单独形成月平均复合物。进行了广泛的排列检验，以检验这些复合材料中没有信号的零假设。结果提供了一个实质性的案例，证明存在与pos…
Abstract A prominent year-round ensemble response to a global sea surface temperature (SST) anomaly field fixed to that for January 1992 (near the peak of a major warm El Nino–Southern Oscillation episode) was observed in a 20-yr integration of the general circulation model used for operational seasonal prediction by the U.S. National Weather Service. This motivated a detailed observational reassessment of the teleconnections between strong SST anomalies in the central equatorial Pacific Ocean and Pacific–North America region 700-hPa heights and U.S. surface temperatures and precipitation. The approach used consisted of formation of monthly mean composites formed separately from cases in which the SST anomaly in a key area of the central equatorial Pacific Ocean was either large and positive or large and negative. Extensive permutation tests were conducted to test null hypotheses of no signal in these composites. The results provided a substantial case for the presence of teleconnections to either the pos...