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Eddy effects on surface chlorophyll in the northern South China Sea: Mechanism investigation and temporal variability analysis
He, Qingyou; Zhan, Haigang; Cai, Shuqun; Li, Zimu; Zhan, HG (reprint author), Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China.
2016
Source PublicationDEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
Volume112Pages:25-36
AbstractThe effects of eddies on surface chlorophyll (CHL) in the northern South China Sea are investigated by analyzing the long-term composite averages of CHL anomalies between 1998 and 2011 that were associated with eddies. CHL anomalies that are modulated by different dynamical processes are distinguished and discussed separately. The positive CHL anomalies within cyclonic eddies are generally larger in magnitude than the negative CHL anomalies within anticyclonic eddies, which implies a net increase in chlorophyll induced by eddy activities. At least two dynamical mechanisms, eddy pumping and eddy stirring, are found to play important roles in the CHL anomalies. The influence of eddy pumping is restricted by the mixed layer depth and its distance from deep nutriclines. Thus, the associated CHL anomalies are most apparent in winter and diminish in the following summer for both cyclonic and anticyclonic eddies. The inter-annual variation in the CHL anomalies within cyclonic eddies is modulated by the eddy intensity and exhibits a close relationship with the El Nino-Southern Oscillation. Meanwhile, the variation within anticyclonic eddies might be affected by the background CHL, with a downward trend during the study period. This work provides an overview to the nature and temporal variations in CHL anomalies that are associated with eddies in the northern South China Sea. (C) 2016 Elsevier Ltd. All rights reserved.
Department[He, Qingyou; Zhan, Haigang; Cai, Shuqun; Li, Zimu] Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China; [He, Qingyou; Li, Zimu] Univ Chinese Acad Sci, Beijing 100049, Peoples R China ; LTO
KeywordMesoscale Eddy Surface Chlorophyll Eddy Pumping Eddy Stirring Northern South China Sea
Subject AreaOceanography
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/15360
Collection热带海洋环境国家重点实验室(LTO)
Corresponding AuthorZhan, HG (reprint author), Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China.
Recommended Citation
GB/T 7714
He, Qingyou,Zhan, Haigang,Cai, Shuqun,et al. Eddy effects on surface chlorophyll in the northern South China Sea: Mechanism investigation and temporal variability analysis[J]. DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,2016,112:25-36.
APA He, Qingyou,Zhan, Haigang,Cai, Shuqun,Li, Zimu,&Zhan, HG .(2016).Eddy effects on surface chlorophyll in the northern South China Sea: Mechanism investigation and temporal variability analysis.DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,112,25-36.
MLA He, Qingyou,et al."Eddy effects on surface chlorophyll in the northern South China Sea: Mechanism investigation and temporal variability analysis".DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS 112(2016):25-36.
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