气候变化领域集成服务门户(CCPortal): Temporal trends in deep ocean Redfield ratios

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DOI	10.1126/science.287.5454.831
	Temporal trends in deep ocean Redfield ratios
	Pahlow M.; Riebesell U.
发表日期	2000
ISSN	0036-8075
起始页码	831
结束页码	833
卷号	287 期号:5454
英文摘要	The Redfield ratio [carbon:nitrogen:phosphorus (C:N:P)] of particle flux to the deep ocean is a key factor in marine biogeochemical cycling. Changes in oceanic carbon sequestration have been linked to variations in the Redfield ratio on geological time scales, but this ratio generally is assumed to be constant with time in the modern ocean. However, deep-water Redfield ratios in the northern hemisphere show evidence for temporal trends over the past five decades. The North Atlantic Ocean exhibits a rising N:P ratio, which may be related to increased deposition of atmospheric nitrous oxides from anthropogenic N emissions. In the North Pacific Ocean, increasing C:N and C:P ratios are accompanied by rising remineralization rates, which suggests intensified export production. Stronger export of carbon in this region may be due to enhanced bioavailability of aeolian iron. These findings imply that the biological part of the marine carbon cycle currently is not in steady state.
英文关键词	carbon; nitrogen; phosphorus; biogeochemical cycle; carbon; deep sea; nitrogen; particulate flux; phosphorus; temporal variation; article; atmosphere; carbon dioxide fixation; marine environment; mineralization; priority journal; sea; Atlantic Ocean; Carbon; Nitrogen; Pacific Ocean; Phosphorus; Seawater; Time Factors
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/244983
作者单位	Alfred Wegener Inst. Polar Mar. Res., Post Office Box 120161, D-27515 Bremerhaven, Germany
推荐引用方式 GB/T 7714	Pahlow M.,Riebesell U.. Temporal trends in deep ocean Redfield ratios[J],2000,287(5454).
APA	Pahlow M.,&Riebesell U..(2000).Temporal trends in deep ocean Redfield ratios.Science,287(5454).
MLA	Pahlow M.,et al."Temporal trends in deep ocean Redfield ratios".Science 287.5454(2000).