气候变化领域集成服务门户(CCPortal): Centennial changes in North Pacific anoxia linked to tropical trade winds

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DOI	10.1126/science.1252332
	Centennial changes in North Pacific anoxia linked to tropical trade winds
	Deutsch C.; Berelson W.; Thunell R.; Weber T.; Tems C.; McManus J.; Crusius J.; Ito T.; Baumgartner T.; Ferreira V.; Mey J.; Van Geen A.
发表日期	2014
ISSN	0036-8075
起始页码	665
结束页码	668
卷号	345 期号:6197
英文摘要	Climate warming is expected to reduce oxygen (O2) supply to the ocean and expand its oxygen minimum zones (OMZs).We reconstructed variations in the extent of North Pacific anoxia since 1850 using a geochemical proxy for denitrification (δ15N) from multiple sediment cores. Increasing δ15N since -1990 records an expansion of anoxia, consistent with observed O2 trends. However, this was preceded by a longer declining δ15N trend that implies that the anoxic zone was shrinking for most of the 20th century. Both periods can be explained by changes in winds over the tropical Pacific that drive upwelling, biological productivity, and O2 demand within the OMZ. If equatorial Pacific winds resume their predicted weakening trend, the ocean's largest anoxic zone will contract despite a global O2 decline.
英文关键词	anoxia; anoxic conditions; denitrification; global warming; nitrogen isotope; oxygen; oxygen minimum layer; sediment core; anoxia; article; climate change; denitrification; geochemical analysis; greenhouse effect; priority journal; sea; sediment; wind; anaerobic growth; chemistry; greenhouse effect; Pacific Ocean; tropic climate; wind; Pacific Ocean; oxygen; sea water; Anaerobiosis; Denitrification; Global Warming; Oxygen; Pacific Ocean; Seawater; Tropical Climate; Wind
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/243524
作者单位	School of Oceanography, University of Washington, Seattle, WA, United States; Department of Earth Sciences, University of Southern California, Los Angeles, CA, United States; Department of Earth and Ocean Sciences, University of South Carolina, Columbia, SC, United States; College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, OR, United States; U.S. Geological Survey, University of Washington School of Oceanography, Seattle, WA, United States; School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, United States; Departamento de Oceanografía Biológica, Centro de Investigación Científica Y de Educación Superior de Ensenada, Baja California, Mexico; Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY, United States; Department of Physical Sciences, Kingsborough Community College, City University of New York, New York, NY, United States; Department of Geosciences, University of Akron, Akron, OH, United States
推荐引用方式 GB/T 7714	Deutsch C.,Berelson W.,Thunell R.,et al. Centennial changes in North Pacific anoxia linked to tropical trade winds[J],2014,345(6197).
APA	Deutsch C..,Berelson W..,Thunell R..,Weber T..,Tems C..,...&Van Geen A..(2014).Centennial changes in North Pacific anoxia linked to tropical trade winds.Science,345(6197).
MLA	Deutsch C.,et al."Centennial changes in North Pacific anoxia linked to tropical trade winds".Science 345.6197(2014).