Comprehensive Observational Features for the Kuroshio Transport Decreasing Trend During a Recent Global Warming Hiatus
Comprehensive Observational Features for the Kuroshio Transport Decreasing Trend During a Recent Global Warming Hiatus
复制标题
最近全球变暖中断期间黑潮输送减少趋势的综合观测特征
DOI：
10.1029/2021gl094169
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发表时间：
2021
影响因子：
5.2
通讯作者：
Hua Zheng
中科院分区：
文献类型：
--
作者：
Zhao-Jun Liu;Xiao-Hua Zhu;Hirohiko Nakamura;Ayako Nishina;Min Wang;Hua Zheng
使用日本南部吐噶喇海峡的长期渡船 ADCP（声学多普勒海流剖面仪）数据和潮汐计数据评估了最近全球变暖中断期间（1998-2013 年）黑潮运输的线性趋势。黑潮表现出约 0.05 Svyear−1 (1 Sv = 106 m3 s−1) 的显着减弱趋势。减弱的黑潮中的重斜层松弛，并在近海边缘显示出浅滩，这归因于垂直温跃层位移而不是水团改变。重要的是，吐噶喇海峡的黑潮输送趋势受到海面高度异常的影响，海面高度异常是由日本南部海岸顺时针斜压模式沿海困波传播和东海下游黑潮平流的综合影响驱动的。这两个特征都是由与北太平洋全球变暖中断相关的风应力旋度变化引起的。
Linear trends in Kuroshio transport during a recent global warming hiatus (1998–2013) were evaluated using long-term ferryboat ADCP (acoustic Doppler current profiler) data and tidal gauge data in the Tokara Strait south of Japan. The Kuroshio exhibited a remarkable weakening trend of approximately 0.05 Sv year−1 (1 Sv = 106 m3 s−1). The pycnocline in the weakened Kuroshio was relaxed and displayed shoaling at the offshore edge, which was attributed to vertical thermocline displacement rather than to water mass modification. Importantly, Kuroshio transport trends in the Tokara Strait were affected by sea surface height anomalies, which were driven by the combined effects of the clockwise baroclinic-mode coastal trapped wave propagation along the southern coast of Japan and downstream Kuroshio advection in the East China Sea. Both features were induced by wind stress curl changes related to the global warming hiatus over the North Pacific.