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学科主题: Environmental Sciences & Ecology ; Remote Sensing ; Imaging Science & Photographic Technology
题名: Satellite bio-optical and altimeter comparisons of phytoplankton blooms induced by natural and artificial iron addition in the Gulf of Alaska
作者: Xiu, P ; Thomas, AC ; Chai, F
通讯作者: peng.xiu@maine.edu
关键词: Iron fertilization ; HNLC ; Eddy ; Volcano ; Iron limitation ; Remote sensing data ; Chlorophyll ; Phytoplankton
刊名: REMOTE SENSING OF ENVIRONMENT
发表日期: 2014
卷: 145, 页:38-46
收录类别: sci
部门归属: [Xiu, Peng ; Thomas, Andrew C. ; Chai, Fei] Univ Maine, Sch Marine Sci, Orono, ME 04469 USA ; [Xiu, Peng] Chinese Acad Sci, South China Sea Inst Oceanog, State Key Lab Trop Oceanog, Guangzhou, Guangdong, Peoples R China
项目归属: LTO
资助者: State Key Laboratory of Tropical Oceanography (South China Sea Institute of Oceanology, Chinese Academy of Sciences) [LT01107]; 100-Talent Program of Chinese Academy of Sciences; Strategic Priority Research Program of the Chinese Academy of Sciences [XDA10010304, NNX10AU07G, NNX09AU39G, OCE-0814413, OCE0815051, OCE-0961345]
摘要: An iron fertilization experiment conducted during the summer of 2012 dumped over 100 tons of an ironcontaining substance into surface waters of a Haida eddy in the eastern North Pacific to stimulate a large phytoplankton bloom. Announced as a privately funded ocean fertilization effort to increase salmon returns, it attracted considerable press coverage, caused much public controversy and has been widely denounced by the science community. Here, we use available satellite bio-optical measurements from the MODIS/Aqua instrument and AVISO altimeter dynamic height data to examine the timing, magnitude and extent of this artificial iron fertilization experiment, comparing it with natural fertilization events such as volcanic ash deposition and mesascale eddy transport in the Gulf of Alaska. With respect to other Haida eddies over the past 10 years, this event produced the highest chlorophyll concentrations observed late (>400 days) in eddy life history, produced the strongest bloom ever observed in an eddy in late-summer and induced this late-summer bloom earlier in the season than any other eddy. With respect to the local area of the fertilization, this experiment induced the most intensive phytoplanlcton bloom of the past 10 years, similar to 2x stronger than that caused by Kasatochi volcano in 2008, similar to 5 x that typically observed in the region, including any induced by passing eddies of previous years. Due to its limited spatial and temporal scales, however, estimated total annual carbon drawdown over the Gulf of Alaska by this experiment is one order of magnitude smaller than the Kasatochi volcano and mesoscale Haida eddies. The target eddy followed a path typical of previous Haida eddies, but with relatively weak dynamic height and rotational circulation. Satellite-based calculations also suggest that only a small fraction of the dumped iron might have been taken up by phytoplankton. The extent to which this localized experiment may impact higher trophic levels such as salmon remains uncertain. (c) 2014 Elsevier Inc. All rights reserved.
原文出处: 查看原文
WOS记录号: WOS:000335113200004
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/10558
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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Xiu, P; Thomas, AC; Chai, F.Satellite bio-optical and altimeter comparisons of phytoplankton blooms induced by natural and artificial iron addition in the Gulf of Alaska,REMOTE SENSING OF ENVIRONMENT,2014,145():38-46
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