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Controlling effects of mesoscale eddies on thermohaline structure and in situ chlorophyll distribution in the western North Pacific
Gao, Wei1,2,3; Wang, Zhenyan1,2,4; Zhang, Kainan1,2,3
2017-11-01
发表期刊JOURNAL OF MARINE SYSTEMS
卷号175页码:24-35
文章类型Article
摘要Based on the conductivity, temperature and depth (CTD) data collected at 93 hydrographic stations during a marine cruise and on contemporary satellite altimeter observations, a series of eddies have been observed passing over the stratified upper water of the Parece Vela Basin. The results from hydrographic measurements and in situ chlorophyll fluorescence measurements have revealed that these eddies exerted significant controlling effects on the thermohaline structure and chlorophyll distribution, especially on the prevalent subsurface chlorophyll maximum layer (SCML). Based on these observations and particulate beam attenuation coefficient (c(p)) data, the in situ phytoplankton bloom around the pycnocline can be largely attributable to the formation of a well-developed SCML in the studied system. The uplift of the cold subsurface water within the cyclone, shoaling the pycnocline to a shallower layer, resulted in a low-temperature anomaly and different salinity anomalies at different depths. This uplift in the cyclone further caused the SCML to appear at a shallower depth with a higher in situ chlorophyll concentration than that in the normal domain. Conversely, the sinking of the warm surface water to the subsurface layer within the anticyclone depressed the pycnocline to a deeper layer and generated a high-temperature anomaly and opposite salinity anomalies compared with the cyclone. The sinking of the pycnocline within the anticyclone considerably influenced the characteristics of the SCML, which had a deeper depth and a lower in situ chlorophyll concentration than that of the normal sea. This study contributes rare quasi-synchronous CTD observations capturing mesoscale eddies and provides valuable descriptions of the variations in the SCML under the influence of mesoscale eddies based on in situ optical measurements from the seldom-discussed western North Pacific. (C) 2017 Elsevier B.V. All rights reserved.
关键词Mesoscale Eddy Thermohaline Structure Subsurface Chlorophyll Maximum Layer Pycnocline Western North Pacific
DOI10.1016/j.jmarsys.2017.07.002
收录类别SCI
语种英语
WOS记录号WOS:000411420700003
引用统计
文献类型期刊论文
版本出版稿
条目标识符http://ir.qdio.ac.cn/handle/337002/143202
专题海洋地质与环境重点实验室
作者单位1.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
2.Chinese Acad Sci, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao 266071, Peoples R China
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Gao, Wei,Wang, Zhenyan,Zhang, Kainan. Controlling effects of mesoscale eddies on thermohaline structure and in situ chlorophyll distribution in the western North Pacific[J]. JOURNAL OF MARINE SYSTEMS,2017,175:24-35.
APA Gao, Wei,Wang, Zhenyan,&Zhang, Kainan.(2017).Controlling effects of mesoscale eddies on thermohaline structure and in situ chlorophyll distribution in the western North Pacific.JOURNAL OF MARINE SYSTEMS,175,24-35.
MLA Gao, Wei,et al."Controlling effects of mesoscale eddies on thermohaline structure and in situ chlorophyll distribution in the western North Pacific".JOURNAL OF MARINE SYSTEMS 175(2017):24-35.
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