气候变化领域集成服务门户(CCPortal): Timing and climatic consequences of the opening of drake passage

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DOI	10.1126/science.1120044
	Timing and climatic consequences of the opening of drake passage
	Scher H.D.; Martin E.E.
发表日期	2006
ISSN	0036-8075
起始页码	428
结束页码	430
卷号	312 期号:5772
英文摘要	Age estimates for the opening of Drake Passage range from 49 to 17 million years ago (Ma), complicating interpretations of the relationship between ocean circulation and global cooling. Secular variations of neodymium isotope ratios at Agulhas Ridge (Southern Ocean, Atlantic sector) suggest an influx of shallow Pacific seawater approximately 41 Ma. The timing of this connection and the subsequent deepening of the passage coincide with increased biological productivity and abrupt climate reversals. Circulation/productivity linkages are proposed as a mechanism for declining atmospheric carbon dioxide. These results also indicate that Drake Passage opened before the Tasmanian Gateway, implying the late Eocene establishment of a complete circum-Antarctic pathway.
英文关键词	Carbon dioxide; Geochronology; Isotopes; Neodymium; Ocean currents; Productivity; Seawater; Biological productivity; Climate reversals; Drake passage; Eocene; Climate change; carbon dioxide; isotope; neodymium; sea water; biological production; carbon dioxide; climate variation; global climate; isotopic analysis; neodymium; oceanic circulation; age determination; Antarctica; article; Atlantic Ocean; atmosphere; climate; cooling; Eocene; ocean current; Pacific Ocean; priority journal; Agulhas Ridge; Atlantic Ocean; Drake Passage; Southern Ocean; Tasmanian Gateway
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/245369
作者单位	Department of Geological Sciences, University of Florida, Gainesville, FL 32611, United States; Department of Earth and Environmental Sciences, University of Rochester, Rochester, NY 14627, United States
推荐引用方式 GB/T 7714	Scher H.D.,Martin E.E.. Timing and climatic consequences of the opening of drake passage[J],2006,312(5772).
APA	Scher H.D.,&Martin E.E..(2006).Timing and climatic consequences of the opening of drake passage.Science,312(5772).
MLA	Scher H.D.,et al."Timing and climatic consequences of the opening of drake passage".Science 312.5772(2006).