On the asymmetry of eddy-induced surface chlorophyll anomalies in the southeastern Pacific: The role of eddy-Ekman pumping

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)

	On the asymmetry of eddy-induced surface chlorophyll anomalies in the southeastern Pacific: The role of eddy-Ekman pumping
	He, Qingyou; Zhan, Haigang; Cai, Shuqun; Zha, Guozhen
刊名	PROGRESS IN OCEANOGRAPHY
	2016
卷号	141 页码:202-211
通讯作者	Zhan, HG (reprint author), Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China.
中文摘要	Mesoscale eddies are ubiquitous features of the World Ocean and have dramatic impacts on the distribution of surface chlorophyll (CHL). It has been reported that CHL anomalies (CHLAs) associated with eddies are dominantly controlled by eddy stirring on a global scale. However, the resultant CHLAs show asymmetric dipoles, indicating that other mechanisms may also play important roles. By analyzing the composite averages of CHLAs associated with 28,293 individual eddies in the southeastern Pacific from 1998 to 2011, we showed that the asymmetry of the CHLAs is mainly attributed to eddy-Ekman pumping. Eddy-Ekman pumping could generate a positive (negative) CHL monopole centered on the core of an anticyclonic (cyclonic) eddy, and the superposition of such a monopole would modify the dipole structure of CHLAs formed by eddy stirring thus result in an asymmetric pattern. The asymmetry exhibits pronounced seasonality, depending on the relative contributions of eddy stirring and eddy-Ekman pumping. In austral winter, the CHL enrichment brought by the upwelling in anticyclonic eddies is more dominant than the CHL diminishment forced by the downwelling in cyclonic eddies, suggesting that eddy-Ekman pumping may represent important sources of new production during this period. (C) 2016 Elsevier Ltd. All rights reserved.
学科主题	Oceanography
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/15561]
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	He, Qingyou,Zhan, Haigang,Cai, Shuqun,et al. On the asymmetry of eddy-induced surface chlorophyll anomalies in the southeastern Pacific: The role of eddy-Ekman pumping[J]. PROGRESS IN OCEANOGRAPHY,2016,141:202-211.
APA	He, Qingyou,Zhan, Haigang,Cai, Shuqun,&Zha, Guozhen.(2016).On the asymmetry of eddy-induced surface chlorophyll anomalies in the southeastern Pacific: The role of eddy-Ekman pumping.PROGRESS IN OCEANOGRAPHY,141,202-211.
MLA	He, Qingyou,et al."On the asymmetry of eddy-induced surface chlorophyll anomalies in the southeastern Pacific: The role of eddy-Ekman pumping".PROGRESS IN OCEANOGRAPHY 141(2016):202-211.