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Interannual Variability of the Mindanao Current/Undercurrent in Direct Observations and Numerical Simulations
Hu, Shijian1,2,3; Hu, Dunxin1,2,3; Guan, Cong1,2,4; Wang, Fan1,2,3; Zhang, Linlin1,2,3; Wang, Fujun1,2,3; Wang, Qingye1,2,3
2016-02-01
发表期刊JOURNAL OF PHYSICAL OCEANOGRAPHY
卷号46期号:2页码:483-499
文章类型Article
摘要The interannual variability of the boundary currents east of the Mindanao Island, including the Mindanao Current/Undercurrent (MC/MUC), is investigated using moored acoustic Doppler current profiler (ADCP) measurements combined with a series of numerical experiments. The ADCP mooring system was deployed east of the Mindanao Island at 7 degrees 59 ' N, 127 degrees 3 ' E during December 2010-August 2014. Depth-dependent interannual variability is detected in the two western boundary currents: strong and lower-frequency variability dominates the upper-layer MC, while weaker and higher-frequency fluctuation controls the subsurface MUC. Throughout the duration of mooring measurements, the weakest MC was observed in June 2012, in contrast to the maximum peaks in December 2010 and June 2014, while in the deeper layer the MUC shows speed peaks circa December 2010, January 2011, April 2013, and July 2014 and valleys circa June 2011, August 2012, and November 2013. Diagnostic analysis and numerical sensitivity experiments using a 2.5-layer reduced-gravity model indicate that wind forcing in the western Pacific Ocean is a driving agent in conditioning the interannual variability of MC and MUC. Results suggest that westward-propagating Rossby waves that generate in the western Pacific Ocean (roughly 150 degrees-180 degrees E) are of much significance in the interannual variability of the two boundary currents. Fluctuation of Ekman pumping due to local wind stress curl anomaly in the far western Pacific Ocean (roughly 120 degrees-150 degrees E) also plays a role in the interannual variability of the MC. The relationship between the MC/MUC and El Nino is discussed.
关键词In Situ Oceanic Observations Geographic Location/entity Pacific Ocean Observational Techniques And Algorithms Boundary Currents Circulation/ Dynamics
DOI10.1175/JPO-D-15-0092.1
收录类别SCI
语种英语
WOS记录号WOS:000372707000001
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被引频次:9[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.qdio.ac.cn/handle/337002/126211
专题海洋环流与波动重点实验室
作者单位1.Chinese Acad Sci, Inst Oceanol, 7 Nanhai Rd, Qingdao 266071, Peoples R China
2.Chinese Acad Sci, Key Lab Ocean Circulat & Wave, Qingdao 266071, Peoples R China
3.Qingdao Natl Lab Marine Sci & Technol, Lab Ocean & Climate Dynam, Qingdao, Peoples R China
4.Univ Chinese Acad Sci, Beijing, Peoples R China
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Hu, Shijian,Hu, Dunxin,Guan, Cong,et al. Interannual Variability of the Mindanao Current/Undercurrent in Direct Observations and Numerical Simulations[J]. JOURNAL OF PHYSICAL OCEANOGRAPHY,2016,46(2):483-499.
APA Hu, Shijian.,Hu, Dunxin.,Guan, Cong.,Wang, Fan.,Zhang, Linlin.,...&Wang, Qingye.(2016).Interannual Variability of the Mindanao Current/Undercurrent in Direct Observations and Numerical Simulations.JOURNAL OF PHYSICAL OCEANOGRAPHY,46(2),483-499.
MLA Hu, Shijian,et al."Interannual Variability of the Mindanao Current/Undercurrent in Direct Observations and Numerical Simulations".JOURNAL OF PHYSICAL OCEANOGRAPHY 46.2(2016):483-499.
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