Coupling and propagating of mesoscale sea level variability between the western Pacific and the South China Sea
Coupling and propagating of mesoscale sea level variability between the western Pacific and the South China Sea
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DOI：
10.1007/s11434-007-0203-3
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发表时间：
2007-06
影响因子：
--
通讯作者：
Li Li-Li;Chunsheng Jing;Dayong Zhu
中科院分区：
文献类型：
--
作者：
Li Li-Li;Chunsheng Jing;Dayong Zhu
基于卫星高度计观测数据、21°N海道海面高度异常（SSHA）和南海北部斜坡的时间序列分析，研究了西太平洋（WP）与南海（SCS）中尺度海平面变化的耦合和传播特征。分析表明，WP中尺度海平面波动对南海的相干效应相当有限，除了45天波段外，没有观测到吕宋海峡中尺度变率的传播。有证据表明，45天的波动很可能是黑潮从低纬度开始的一个特征。向西传播的罗斯比波在遇到黑潮的动力屏障时会发生变形。然后黑潮会以自己的方式对南海采取行动。从海洋中尺度波耦合和传播的意义上说，南海是一个相对孤立的系统。
The coupling and propagating features of mesoscale sea level variability between the western Pacific (WP) and the South China Sea (SCS) were studied based on time series analyses of satellite altimeter measured, along-track sea surface height anomalies (SSHA) along 21°N and the slope of the northern SCS. The analyses show that mesoscale sea level fluctuations in the WP have rather limited coherent effects on the SCS, and no statistically significant propagation of mesoscale variability through the Luzon Strait was observed except in the 45-day band. Evidence suggests that the 45-day fluctuation is very much likely a character of the Kuroshio originating from its low-latitude beginning. It is also suggested that the westward propagating Rossby waves will deform when they encounter the dynamical barrier of the Kuroshio. The Kuroshio will then acts on the SCS in its own way. The SCS is a relatively isolated system in the sense of coupling and propagating of oceanic mesoscale waves.