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学科主题: Geology ; Marine & Freshwater Biology ; Oceanography
题名: Enhancement of eddy-Ekman pumping inside anticyclonic eddies with wind-parallel extension: Satellite observations and numerical studies in the South China Sea
作者: Li, JM ; Qi, YQ ; Jing, ZY ; Wang, J
通讯作者: jingzhiyou@scsio.ac.cn
关键词: Eddies ; Ekman pumping ; Wind-parallel extension ; The South China Sea ; Monsoons ; Chlorophylls
刊名: JOURNAL OF MARINE SYSTEMS
发表日期: 2014
卷: 132, 页:150-161
收录类别: sci
部门归属: [Li, Junmin ; Qi, Yiquan ; Jing, Zhiyou] Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China ; [Wang, Jia] NOAA Great Lakes Environm Res Lab, Ann Arbor, MI USA
项目归属: LTO
资助者: Strategic Priority Research Program of the Chinese Academy of Sciences [XDA11010203, XDA11020201]; Knowledge Innovation Program of the Chinese Academy of Sciences [KZCX2-EW-204, SQ201101]; National Natural Science Foundation of China [U1033003, 41 276022, 41230962]; NOAA Climate Program Office
摘要: Eddy-Ekman pumping was recently proposed as a potential mechanism to explain the high chlorophyll (Chl) concentrations inside anticyclonic eddies (AEs). In this paper, the influence of eddy-shape changes on the strength of eddy-Ekman pumping is investigated for AEs in the South China Sea (SCS) through multi-satellite data and numerical experiments. The results mainly indicate that wind-parallel (-perpendicular) extensions may enhance (reduce) eddy-Ekman pumping inside AEs. First an AE detected in northern SCS winter shows significant Chl-wind relation and uplifted near-surface isopycnals when its shape extension becomes parallel with the wind direction. In addition, satellite observations indicate significant eddy-Ekman-pumping signals appear in the central-northern SCS during the winter monsoon and in the central-eastern SCS during the winter and summer monsoons, whenever and wherever AEs' shapes show wind-parallel extensions. This regional-seasonal characteristic is further confirmed by the numerical experiments, which display a positive linear relationship between wind-parallel projective length and the strength of eddy-Ekman pumping. This study may contribute to extend the theory of eddy-Ekman pumping with emphasizing the importance of eddy shapes and wind directions, especially in the situations that high spatial-temporal variability appears in eddies and/or the wind field. (C) 2014 Elsevier B.V. All rights reserved.
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WOS记录号: WOS:000334141400013
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/10561
Appears in Collections:热带海洋环境国家重点实验室(LTO)_期刊论文

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Li, JM; Qi, YQ; Jing, ZY; Wang, J.Enhancement of eddy-Ekman pumping inside anticyclonic eddies with wind-parallel extension: Satellite observations and numerical studies in the South China Sea,JOURNAL OF MARINE SYSTEMS,2014,132():150-161
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