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Seasonal variation of the surface North Equatorial Countercurrent (NECC) in the western Pacific Ocean
Zhao Jun1; Li Yuanlong1,2; Wang Fan1,3
2016-11-01
发表期刊CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY
卷号34期号:6页码:1332-1346
文章类型Article
摘要The North Equatorial Countercurrent (NECC) is an important zonal flow in the upper circulation of the tropical Pacific Ocean, which plays a vital role in the heat budget of the western Pacific warm pool. Using satellite-derived data of ocean surface currents and sea surface heights (SSHs) from 1992 to 2011, the seasonal variation of the surface NECC in the western tropical Pacific Ocean was investigated. It was found that the intensity (INT) and axis position (Y CM ) of the surface NECC exhibit strikingly different seasonal fluctuations in the upstream (128A degrees-136A degrees E) and downstream (145A degrees-160A degrees E) regions. Of the two regions, the seasonal cycle of the upstream NECC shows the greater interannual variability. Its INT and Y-CM are greatly influenced by variations of the Mindanao Eddy, Mindanao Dome (MD), and equatorial Rossby waves to its south. Both INT and Y CM also show semiannual signals induced by the combined effects of equatorial Rossby waves from the Central Pacific and local wind forcing in the western Pacific Ocean. In the downstream region, the variability of the NECC is affected by SSH anomalies in the MD and the central equatorial Pacific Ocean. Those in the MD region are especially important in modulating the Y-CM of the downstream NECC. In addition to the SSH-related geostrophic flow, zonal Ekman flow driven by meridional wind stress also plays a role, having considerable impact on INT variability of the surface NECC. The contrasting features of the variability of the NECC in the upstream and downstream regions reflect the high complexity of regional ocean dynamics.
关键词North Equatorial Countercurrent (Necc) Seasonal Variation Western Pacific Ocean Wind Stress
DOI10.1007/s00343-016-5119-9
收录类别SCI
语种英语
WOS记录号WOS:000382885200018
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被引频次:1[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/337002/135829
专题海洋环流与波动重点实验室
作者单位1.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao 266071, Peoples R China
2.Univ Colorado, Dept Atmospher & Ocean Sci, Boulder, CO 80309 USA
3.Qingdao Natl Lab Marine Sci & Technol, Funct Lab Ocean Dynam & Climate, Qingdao 266000, Peoples R China
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Zhao Jun,Li Yuanlong,Wang Fan. Seasonal variation of the surface North Equatorial Countercurrent (NECC) in the western Pacific Ocean[J]. CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2016,34(6):1332-1346.
APA Zhao Jun,Li Yuanlong,&Wang Fan.(2016).Seasonal variation of the surface North Equatorial Countercurrent (NECC) in the western Pacific Ocean.CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,34(6),1332-1346.
MLA Zhao Jun,et al."Seasonal variation of the surface North Equatorial Countercurrent (NECC) in the western Pacific Ocean".CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY 34.6(2016):1332-1346.
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