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Weak Thermocline Mixing in the North Pacific Low-Latitude Western Boundary Current System
Liu, Zhiyu1,2; Lian, Qiang1,2,3; Zhang, Fangtao1,2; Wang, Lei1,2; Li, Mingming4; Bai, Xiaolin1,2; Wang, Jianing5; Wang, Fan5
2017-10-28
发表期刊GEOPHYSICAL RESEARCH LETTERS
卷号44期号:20页码:10530-10539
文章类型Article
摘要Despite its potential importance in the global climate system, mixing properties of the North Pacific low-latitude western boundary current system (LLWBC) remained unsampled until very recently. We report here on the first measurements of turbulence microstructure associated with these currents, made in the western boundary region of the tropical North Pacific east of the Philippines. The results suggest that thermocline mixing in the North Pacific LLWBC is generally weak with the diapycnal diffusivity kappa(rho) similar to O(10(-6))m(2) s(-1). This is consistent with predictions from internal wave-wave interaction theory that mixing due to internal wave breaking is significantly reduced at low latitudes. Enhanced mixing is found to be associated with a permanent cyclonic eddy, the Mindanao Eddy, but mainly at its south and north flanks. There, kappa(rho) is elevated by an order of magnitude due to eddy-induced geostrophic shear. Mixing in the eddy core is at the background level with no indication of enhancement.
DOI10.1002/2017GL075210
收录类别SCI
语种英语
WOS记录号WOS:000416761600053
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被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
版本出版稿
条目标识符http://ir.qdio.ac.cn/handle/337002/143289
专题海洋环流与波动重点实验室
实验海洋生物学重点实验室
作者单位1.Xiamen Univ, State Key Lab Marine Environm Sci, Coll Ocean & Earth Sci, Xiamen, Peoples R China
2.Xiamen Univ, Dept Phys Oceanog, Coll Ocean & Earth Sci, Xiamen, Peoples R China
3.Oregon State Univ, Coll Earth Ocean & Atmospher Sci, Corvallis, OR 97331 USA
4.Guangdong Ocean Univ, Coll Oceanog & Meteorol, Zhanjiang, Peoples R China
5.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China
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Liu, Zhiyu,Lian, Qiang,Zhang, Fangtao,et al. Weak Thermocline Mixing in the North Pacific Low-Latitude Western Boundary Current System[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(20):10530-10539.
APA Liu, Zhiyu.,Lian, Qiang.,Zhang, Fangtao.,Wang, Lei.,Li, Mingming.,...&Wang, Fan.(2017).Weak Thermocline Mixing in the North Pacific Low-Latitude Western Boundary Current System.GEOPHYSICAL RESEARCH LETTERS,44(20),10530-10539.
MLA Liu, Zhiyu,et al."Weak Thermocline Mixing in the North Pacific Low-Latitude Western Boundary Current System".GEOPHYSICAL RESEARCH LETTERS 44.20(2017):10530-10539.
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