Interannual Variability of Equatorial Eastern Indian Ocean Upwelling: Local versus Remote Forcing*

CORC > 南海海洋研究所 > 中国科学院南海海洋研究所 > 热带海洋环境国家重点实验室(LTO)

	Interannual Variability of Equatorial Eastern Indian Ocean Upwelling: Local versus Remote Forcing*
	Chen, Gengxin; Han, Weiqing; Li, Yuanlong; Wang, Dongxiao
刊名	JOURNAL OF PHYSICAL OCEANOGRAPHY
	2016
卷号	46 期号:3 页码:789-807
关键词	Wind stress Upwelling/downwelling Circulation/ Dynamics Ocean dynamics Kelvin waves
通讯作者	Chen, GX (reprint author), Chinese Acad Sci, State Key Lab Trop Oceanog, South China Sea Inst Oceanol, 164 West Xingang Rd, Guangzhou 510301, Guangdong, Peoples R China.
中文摘要	The equatorial eastern Indian Ocean (EIO) upwelling occurs in the Indian Ocean warm pool, differing from the equatorial Pacific and Atlantic upwelling that occurs in the cold tongue. By analyzing observations and performing ocean model experiments, this paper quantifies the remote versus local forcing in causing interannual variability of the equatorial EIO upwelling from 2001 to 2011 and elucidates the associated processes. For all seasons, interannual variability of thermocline depth in the EIO, as an indicator of upwelling, is dominated by remote forcing from equatorial Indian Ocean winds, which drive Kelvin waves that propagate along the equator and subsequently along the Sumatra-Java coasts. Upwelling has prominent signatures in sea surface temperature (SST) and chlorophyll-a concentration but only in boreal summer-fall (May-October). Local forcing plays a larger role than remote forcing in producing interannual SST anomaly (SSTA). During boreal summer-fall, when the mean thermocline is relatively shallow, SSTA is primarily driven by the upwelling process, with comparable contributions from remote and local forcing effects. In contrast, during boreal winter-spring (November-April), when the mean thermocline is relatively deep, SSTA is controlled by surface heat flux and decoupled from thermocline variability. Advection affects interannual SSTA in all cases. The remote and local winds that drive the interannual variability of the equatorial EIO upwelling are closely associated with Indian Ocean dipole events and to a lesser degree with El Nino-Southern Oscillation.
学科主题	Oceanography
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/15559]
专题	南海海洋研究所_热带海洋环境国家重点实验室(LTO)
推荐引用方式 GB/T 7714	Chen, Gengxin,Han, Weiqing,Li, Yuanlong,et al. Interannual Variability of Equatorial Eastern Indian Ocean Upwelling: Local versus Remote Forcing*[J]. JOURNAL OF PHYSICAL OCEANOGRAPHY,2016,46(3):789-807.
APA	Chen, Gengxin,Han, Weiqing,Li, Yuanlong,&Wang, Dongxiao.(2016).Interannual Variability of Equatorial Eastern Indian Ocean Upwelling: Local versus Remote Forcing*.JOURNAL OF PHYSICAL OCEANOGRAPHY,46(3),789-807.
MLA	Chen, Gengxin,et al."Interannual Variability of Equatorial Eastern Indian Ocean Upwelling: Local versus Remote Forcing*".JOURNAL OF PHYSICAL OCEANOGRAPHY 46.3(2016):789-807.