气候变化领域集成服务门户(CCPortal): Isotopic evidence for glaciation during the cretaceous supergreenhouse

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DOI	10.1126/science.1148777
	Isotopic evidence for glaciation during the cretaceous supergreenhouse
	Bornemann A.; Norris R.D.; Friedrich O.; Beckmann B.; Schouten S.; Damsté J.S.S.; Vogel J.; Hofmann P.; Wagner T.
发表日期	2008
ISSN	0036-8075
起始页码	189
结束页码	192
卷号	319 期号:5860
英文摘要	The Turonian (93.5 to 89.3 million years ago) was one of the warmest periods of the Phanerozoic eon, with tropical sea surface temperatures over 35°C. High-amplitude sea-level changes and positive δ18O excursions in marine limestones suggest that glaciation events may have punctuated this episode of extreme warmth. New δ18O data from the tropical Atlantic show synchronous shifts ∼91.2 million years ago for both the surface and deep ocean that are consistent with an approximately 200,000-year period of glaciation, with ice sheets of about half the size of the modern Antarctic ice cap. Even the prevailing supergreenhouse climate was not a barrier to the formation of large ice sheets, calling into question the common assumption that the poles were always ice-free during past periods of intense global warming.
英文关键词	Cretaceous; glaciation; global warming; ice cap; ice sheet; isotopic analysis; limestone; Phanerozoic; sea level change; sea surface temperature; tropical environment; Turonian; Antarctica; article; Cretaceous; glaciation; greenhouse; greenhouse effect; ice cap; Phanerozoic; priority journal; sea level; sea surface temperature; temperature dependence; Turonian; Antarctica
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/243098
作者单位	Scripps Institution of Oceanography, University of California, San Diego, Geosciences Research Division, 9500 Gilman Drive, San Diego, CA 92093-0244, United States; Institut für Geophysik und Geologie, Universität Leipzig, Talstraße 35, D-04103 Leipzig, Germany; School of Ocean and Earth Science, National Oceanography Centre, European Way, Southampton SO14 3ZH, United Kingdom; Institut für Geologie und Mineralogie, Universität Köln, Zülpicher Straße 49a, D-50674 Köln, Germany; Department of Marine Biogeochemistry and Toxicology, Royal Netherlands Institute for Sea Research, Post Office Box 59, 1790 AB Den Burg, Texel, Netherlands; School of Civil Engineering and Geosciences, Newcastle University, Newcastle upon Tyne NE1 7RU, United Kingdom
推荐引用方式 GB/T 7714	Bornemann A.,Norris R.D.,Friedrich O.,et al. Isotopic evidence for glaciation during the cretaceous supergreenhouse[J],2008,319(5860).
APA	Bornemann A..,Norris R.D..,Friedrich O..,Beckmann B..,Schouten S..,...&Wagner T..(2008).Isotopic evidence for glaciation during the cretaceous supergreenhouse.Science,319(5860).
MLA	Bornemann A.,et al."Isotopic evidence for glaciation during the cretaceous supergreenhouse".Science 319.5860(2008).