Chlorophyll variability induced by mesoscale eddies in the southeastern tropical Indian Ocean

doi:10.1016/j.jmarsys.2019.103209

	Chlorophyll variability induced by mesoscale eddies in the southeastern tropical Indian Ocean
	Yang, Guang 1,2,7; Zhao, Xia 3,4,5; Li, Yuanlong 3,4,5; Liu, Lin 1,2,7; Wang, Fan 3,4,5; Yu, Weidong 2,6
刊名	JOURNAL OF MARINE SYSTEMS
	2019-11
卷号	199
关键词	Mesoscale eddies Chlorophyll-a Southeastern tropical Indian Ocean Upwelling season
ISSN号	0924-7963
DOI	10.1016/j.jmarsys.2019.103209
英文摘要	High sea surface chlorophyll-a concentrations (CHL) and intensive mesoscale eddy activity coexist near the coast of Java in the southeastern tropical Indian Ocean (SETIO) in upwelling season (July-November). In this study, the modulation effects of mesoscale eddies on the local CHL variability are investigated by analyzing remote sensed as well as in situ observations together with ocean and atmospheric reanalysis data from 1997 to 2010. Within 400 km off the coast, the mean CHL inside cyclonic eddies (CEs) is 2-3-fold higher than background, and is obviously suppressed inside anticyclonic eddies (AEs). During upwelling season, more and stronger CEs are generated, which significantly contributes to the high mean CHL levels. A composite analysis revealed that CEs induce CHL anomalies through both vertical upwelling that elevates nutrient-rich water from the subsurface to the surface and horizontal advection that carries high-CHL water from the coast to the offshore area. These effects are particularly visible during the upwelling season, when advection of the background high CHL favors large eddy modulation on the CHL. The eddy-induced CHL anomalies also exhibit prominent interannual variability, which has a close relationship with the El Nino-Southern Oscillation and the Indian Ocean Dipole (IOD). The wind forcing of El Nino and positive IOD events can enhance the vertical shear of the background currents and favor energetic CEs off Java coast, which contributes to the interannual variability of the local CHL. These results underscore the fundamental role played by mesoscale eddies in the ocean dynamics, environment, and bio-system of this region.
资助项目	State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences[LT01803]
WOS关键词	INTRASEASONAL VARIABILITY ; ALGERIAN BASIN ; COLOR VARIABILITY ; PACIFIC-OCEAN ; EL-NINO ; EDDY ; SOUTH ; PHYTOPLANKTON ; CIRCULATION ; DYNAMICS
WOS研究方向	Geology ; Marine & Freshwater Biology ; Oceanography
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000486133400002
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/30150]
专题	自然资源部第一海洋研究所
通讯作者	Yu, Weidong
作者单位	1.Minist Nat Resources, Inst Oceanog 1, Ctr Ocean & Climate Res, Qingdao 266061, Shandong, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Reg Oceanog & Numer Modeling, Qingdao 266061, Shandong, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao 266071, Shandong, Peoples R China 4.Qingdao Natl Lab Marine Sci & Technol, Qingdao 266071, Shandong, Peoples R China 5.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao 266071, Shandong, Peoples R China 6.Sun Yat Sen Univ, Sch Atmospher Sci, 2 Daxue Rd, Zhuhai 519082, Peoples R China 7.Minsitry Nat Resources, Key Lab Marine Sci & Numer Modeling, Qingdao 266061, Shandong, Peoples R China
推荐引用方式 GB/T 7714	Yang, Guang,Zhao, Xia,Li, Yuanlong,et al. Chlorophyll variability induced by mesoscale eddies in the southeastern tropical Indian Ocean[J]. JOURNAL OF MARINE SYSTEMS,2019,199.
APA	Yang, Guang,Zhao, Xia,Li, Yuanlong,Liu, Lin,Wang, Fan,&Yu, Weidong.(2019).Chlorophyll variability induced by mesoscale eddies in the southeastern tropical Indian Ocean.JOURNAL OF MARINE SYSTEMS,199.
MLA	Yang, Guang,et al."Chlorophyll variability induced by mesoscale eddies in the southeastern tropical Indian Ocean".JOURNAL OF MARINE SYSTEMS 199(2019).