Revisit the interannual variability of the North Equatorial Current transport with ECMWF ORA-S3

doi:10.1002/jgrc.20093

IOCAS-IR > 海洋环流与波动重点实验室

	Revisit the interannual variability of the North Equatorial Current transport with ECMWF ORA-S3
	Zhai, Fangguo 1,2,3; Hu, Dunxin 1,2; Hu, DX
	2013-03-01
发表期刊	JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
ISSN	2169-9275
卷号	118 期号:3 页码:1349-1366
文章类型	Article
摘要	The interannual variability of the North Equatorial Current (NEC) transport in the tropical northwestern Pacific Ocean is investigated with the output from ECMWF Ocean Analysis/Reanalysis System 3 (ORA-S3). The results show that the amplitude and root mean square (RMS) of interannual NEC transport anomalies increase from about 3.0-4.0 Sv and 2.0 Sv at 170 degrees E to above 5.0 and 3.4 Sv at 135 degrees E, respectively. The NEC transport variation agrees well with the variation of the sea surface height (SSH) anomaly difference between the southern and northern boundaries of the NEC region. Further analysis near the Philippine coast suggests that their good agreement mainly comes from the agreement of the NEC transport and SSH variations south of the gyre boundary. Around the bifurcation point off the Philippine coast, the southern branch of the NEC transport is highly related to El Nino-Southern Oscillation (ENSO) events. During El Nino/La Nina years, westerly/easterly wind anomalies and positive/negative wind stress curl anomalies develop in the tropical northwestern Pacific Ocean south of 20 degrees N before the mature phase. The wind forcing center moves eastward with time and reaches the easternmost position around 170 degrees E several months before the mature phase. This wind forcing generates upwelling/downwelling Rossby waves, which propagate westward to result in negative/positive SSH anomalies, hence inducing a cyclonic/anticyclonic gyre anomaly, which is responsible for the increase/decrease of the NEC transport. The northern branch of the NEC transport near the Philippine coast has no significant simultaneous relation with ENSO events.; The interannual variability of the North Equatorial Current (NEC) transport in the tropical northwestern Pacific Ocean is investigated with the output from ECMWF Ocean Analysis/Reanalysis System 3 (ORA-S3). The results show that the amplitude and root mean square (RMS) of interannual NEC transport anomalies increase from about 3.0-4.0 Sv and 2.0 Sv at 170 degrees E to above 5.0 and 3.4 Sv at 135 degrees E, respectively. The NEC transport variation agrees well with the variation of the sea surface height (SSH) anomaly difference between the southern and northern boundaries of the NEC region. Further analysis near the Philippine coast suggests that their good agreement mainly comes from the agreement of the NEC transport and SSH variations south of the gyre boundary. Around the bifurcation point off the Philippine coast, the southern branch of the NEC transport is highly related to El Nino-Southern Oscillation (ENSO) events. During El Nino/La Nina years, westerly/easterly wind anomalies and positive/negative wind stress curl anomalies develop in the tropical northwestern Pacific Ocean south of 20 degrees N before the mature phase. The wind forcing center moves eastward with time and reaches the easternmost position around 170 degrees E several months before the mature phase. This wind forcing generates upwelling/downwelling Rossby waves, which propagate westward to result in negative/positive SSH anomalies, hence inducing a cyclonic/anticyclonic gyre anomaly, which is responsible for the increase/decrease of the NEC transport. The northern branch of the NEC transport near the Philippine coast has no significant simultaneous relation with ENSO events.
学科领域	Oceanography
DOI	10.1002/jgrc.20093
URL	查看原文
收录类别	SCI
语种	英语
WOS研究方向	Oceanography
WOS类目	Oceanography
WOS记录号	WOS:000320323200021
WOS关键词	NINO-SOUTHERN-OSCILLATION ; BAROCLINIC ROSSBY WAVES ; PACIFIC-OCEAN ; CURRENT BIFURCATION ; TROPICAL PACIFIC ; WESTERN BOUNDARY ; MINDANAO CURRENT ; CIRCULATION ; PHILIPPINES ; KUROSHIO
WOS标题词	Science & Technology ; Physical Sciences
引用统计	被引频次：40[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/337002/16429
专题	海洋环流与波动重点实验室
通讯作者	Hu, DX
作者单位	1.Chinese Acad Sci, Key Lab Ocean Circulat & Waves, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 3.State Ocean Adm, Inst Oceanog 3, Xiamen, Peoples R China
第一作者单位	海洋环流与波动重点实验室; 中国科学院海洋研究所
推荐引用方式 GB/T 7714	Zhai, Fangguo,Hu, Dunxin,Hu, DX. Revisit the interannual variability of the North Equatorial Current transport with ECMWF ORA-S3[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2013,118(3):1349-1366.
APA	Zhai, Fangguo,Hu, Dunxin,&Hu, DX.(2013).Revisit the interannual variability of the North Equatorial Current transport with ECMWF ORA-S3.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,118(3),1349-1366.
MLA	Zhai, Fangguo,et al."Revisit the interannual variability of the North Equatorial Current transport with ECMWF ORA-S3".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 118.3(2013):1349-1366.

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