Footprinting: A seasonal connection between the tropics and mid‐latitudes
Footprinting: A seasonal connection between the tropics and mid‐latitudes
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DOI：
10.1029/2001gl013435
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发表时间：
2001-10
影响因子：
5.2
通讯作者：
D. Vimont;D. Battisti;A. Hirst
中科院分区：
文献类型：
--
作者：
D. Vimont;D. Battisti;A. Hirst
耦合环流模式（CGCM）确定了中纬度和热带太平洋之间的联系。这种联系涉及冬季中纬度大气环流异常和夏季赤道风应力异常之间的季节性耦合。季节耦合源于“足迹”机制，其中夏季热带大气对前一个冬季中纬度大气变率产生的副热带海表温度（SST）异常作出响应。详细介绍了连接和足迹机制。对年际ENSO和年代际ENSO样变率的影响进行了讨论。
A connection between the mid‐latitude and tropical Pacific is identified in a coupled general circulation model (CGCM). The connection involves a seasonal coupling between winter mid‐latitude atmospheric circulation anomalies, and summer equatorial wind stress anomalies. The seasonal coupling results from a “footprinting” mechanism, in which the summer tropical atmosphere responds to subtropical sea surface temperature (SST) anomalies that are generated by the mid‐latitude atmospheric variability during the previous winter. Details of the connection, and of the footprinting mechanism are presented. Implications for interannual ENSO and decadal ENSO‐like variability are discussed.