Satellite bio-optical and altimeter comparisons of phytoplankton blooms induced by natural and artificial iron addition in the Gulf of Alaska

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)

	Satellite bio-optical and altimeter comparisons of phytoplankton blooms induced by natural and artificial iron addition in the Gulf of Alaska
	Xiu, P ; Thomas, AC ; Chai, F
刊名	REMOTE SENSING OF ENVIRONMENT
	2014
卷号	145 页码:38-46
关键词	Iron fertilization HNLC Eddy Volcano Iron limitation Remote sensing data Chlorophyll Phytoplankton
ISSN号	0034-4257
通讯作者	peng.xiu@maine.edu
中文摘要	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.
学科主题	Environmental Sciences & Ecology ; Remote Sensing ; Imaging Science & Photographic Technology
收录类别	SCI
资助信息	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]
原文出处	ELSEVIER SCIENCE INC
WOS记录号	WOS:000335113200004
公开日期	2014-12-11
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/10558]
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	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[J]. REMOTE SENSING OF ENVIRONMENT,2014,145:38-46.
APA	Xiu, P,Thomas, AC,&Chai, F.(2014).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,145,38-46.
MLA	Xiu, P,et al."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 145(2014):38-46.