气候变化领域集成服务门户(CCPortal): Atmospheric science: Marked decline in atmospheric carbon dioxide concentrations during the Paleogene

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DOI	10.1126/science.1110063
	Atmospheric science: Marked decline in atmospheric carbon dioxide concentrations during the Paleogene
	Pagani M.; Zachos J.C.; Freeman K.H.; Tipple B.; Bohaty S.
发表日期	2005
ISSN	0036-8075
起始页码	600
结束页码	603
卷号	309 期号:5734
英文摘要	The relation between the partial pressure of atmospheric carbon dioxide (pCO2) and Paleogene climate is poorly resolved. We used stable carbon isotopic values of di-unsaturated alkenones extracted from deep sea cores to reconstruct pCO2 from the middle Eocene to the late Oligocene (∼45 to 25 million years ago). Our results demonstrate that pCO2 ranged between 1000 to 1500 parts per million by volume in the middle to late Eocene, then decreased in several steps during the Oligocene, and reached modern levels by the latest Oligocene. The fall in pCO2 likely allowed for a critical expansion of ice sheets on Antarctica and promoted conditions that forced the onset of terrestrial C4 photosynthesis.
英文关键词	Climate change; Ice; Photosynthesis; Sea level; Deep sea; Oligocene; Paleogene climate; Carbon dioxide; alkene derivative; carbon; carbon; carbon dioxide; ice; carbon dioxide; Neogene; paleoclimate; Antarctica; arctic climate; article; atmospheric dispersion; carbon dioxide measurement; climate change; environmental factor; molecular stability; Oligocene; Paleogene; photosynthesis; pressure; priority journal; alga; atmosphere; climate; cytology; ecosystem; growth, development and aging; metabolism; photosynthesis; phytoplankton; plant; Poaceae; time; Algae; Atmosphere; Carbon Dioxide; Carbon Isotopes; Climate; Ecosystem; Ice; Photosynthesis; Phytoplankton; Plants; Poaceae; Time
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/244981
作者单位	Department of Geology and Geophysics, Yale University, 210 Whitney Avenue, New Haven, CT 06511, United States; Earth Sciences Department, University of California, 1156 High Street, Santa Cruz, CA 95064, United States; Department of Geosciences, Pennsylvania State University, University Park, PA 16802, United States
推荐引用方式 GB/T 7714	Pagani M.,Zachos J.C.,Freeman K.H.,et al. Atmospheric science: Marked decline in atmospheric carbon dioxide concentrations during the Paleogene[J],2005,309(5734).
APA	Pagani M.,Zachos J.C.,Freeman K.H.,Tipple B.,&Bohaty S..(2005).Atmospheric science: Marked decline in atmospheric carbon dioxide concentrations during the Paleogene.Science,309(5734).
MLA	Pagani M.,et al."Atmospheric science: Marked decline in atmospheric carbon dioxide concentrations during the Paleogene".Science 309.5734(2005).