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

CORC > 海洋研究所 > 中国科学院海洋研究所 > 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
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
	2013-03-01
卷号	118 期号:3 页码:1349-1366
ISSN号	2169-9275
通讯作者	Hu, DX
中文摘要	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.
英文摘要	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.
学科主题	Oceanography
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Oceanography
研究领域[WOS]	Oceanography
关键词[WOS]	NINO-SOUTHERN-OSCILLATION ; BAROCLINIC ROSSBY WAVES ; PACIFIC-OCEAN ; CURRENT BIFURCATION ; TROPICAL PACIFIC ; WESTERN BOUNDARY ; MINDANAO CURRENT ; CIRCULATION ; PHILIPPINES ; KUROSHIO
收录类别	SCI
原文出处	10.1002/jgrc.20093
语种	英语
WOS记录号	WOS:000320323200021
公开日期	2014-07-17
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/16429]
专题	海洋研究所_海洋环流与波动重点实验室
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
推荐引用方式 GB/T 7714	Zhai, Fangguo,Hu, Dunxin. 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.(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.