Subtropics-Related Interannual Sea Surface Temperature Variability in the Central Equatorial Pacific
Subtropics-Related Interannual Sea Surface Temperature Variability in the Central Equatorial Pacific
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DOI：
10.1175/2010jcli3171.1
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发表时间：
2010-06
影响因子：
4.9
通讯作者：
Jin‐Yi Yu;H. Kao;Tong Lee
中科院分区：
文献类型：
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作者：
Jin‐Yi Yu;H. Kao;Tong Lee
摘要 赤道中太平洋海表温度（SST）年际变化由与东太平洋海表温度变化相关的分量（称为1型海表温度变化）和与东太平洋海表温度变化无关的分量（称为2型海表温度变化）组成。进行超前滞后回归和海洋表层温度平衡分析来对比它们的控制机制。 1型变率是典型的一部分，其特征是海温异常从南美海岸延伸到太平洋中部，与南方涛动相结合，并与整个盆地的地下海洋变化有关。这种类型的变异主要由 4-5 年的主要周期性和 2-2.5 年的次要周期性组成。相比之下，2 型变率以两年一次的周期性为主，与局部海气相互作用有关，并且缺乏流域范围的异常结构。此外，2 型海温变化与两个半球的副热带地区表现出密切的联系......
Abstract Interannual sea surface temperature (SST) variability in the central equatorial Pacific consists of a component related to eastern Pacific SST variations (called Type-1 SST variability) and a component not related to them (called Type-2 SST variability). Lead–lagged regression and ocean surface-layer temperature balance analyses were performed to contrast their control mechanisms. Type-1 variability is part of the canonical, which is characterized by SST anomalies extending from the South American coast to the central Pacific, is coupled with the Southern Oscillation, and is associated with basinwide subsurface ocean variations. This type of variability is dominated by a major 4–5-yr periodicity and a minor biennial (2–2.5 yr) periodicity. In contrast, Type-2 variability is dominated by a biennial periodicity, is associated with local air–sea interactions, and lacks a basinwide anomaly structure. In addition, Type-2 SST variability exhibits a strong connection to the subtropics of both hemisphere...