On the Observed Relationships between Wintertime Variability in Kuroshio–Oyashio Extension Sea Surface Temperatures and the Atmospheric Circulation over the North Pacific
On the Observed Relationships between Wintertime Variability in Kuroshio–Oyashio Extension Sea Surface Temperatures and the Atmospheric Circulation over the North Pacific
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DOI：
10.1175/jcli-d-17-0343.1
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发表时间：
2018-05
影响因子：
4.9
通讯作者：
Samantha M. Wills;D. Thompson
中科院分区：
文献类型：
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作者：
Samantha M. Wills;D. Thompson
观测分析表明，北太平洋黑潮-好潮延伸区（KOE）冬季海温（SST）的变化与两种明显且强劲的大气变率模式有关：1)在KOE海温大异常前约2 - 3周达到振幅峰值的模式，与海温场的大气强迫一致；2)在KOE海温异常后约一个月出现的非常不同的模式。后一种模式主要由低海平面气压异常和通过温暖的海温异常进入大气的湍流热通量主导，并被解释为大气对KOE区域海温异常的短暂响应。这些结果提供了越来越多的证据，表明中纬度海洋海温的变化能够显著影响大尺度大气环流，特别是在西部边界流附近。
Observational analyses reveal that wintertime variations in sea surface temperatures (SST) in the Kuroshio–Oyashio Extension (KOE) region of the North Pacific are associated with two distinct and robust patterns of atmospheric variability: 1) a pattern that peaks in amplitude approximately 2–3 weeks prior to large KOE SST anomalies and is consistent with atmospheric forcing of the SST field and 2) a very different pattern that lags SST anomalies in the KOE region by approximately a month. The latter pattern is dominated by low sea level pressure anomalies and turbulent heat fluxes directed into the atmosphere over warm SST anomalies and is interpreted as the transient atmospheric response to SST anomalies over the KOE region. The results contribute to a growing body of evidence that suggests variations in SSTs in the midlatitude oceans are capable of significantly influencing the large-scale atmospheric circulation, especially near western boundary currents.