气候变化领域集成服务门户(CCPortal): Postimpact earliest Paleogene warming shown by fish debris oxygen isotopes (El Kef, Tunisia)

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DOI	10.1126/science.aap8525
	Postimpact earliest Paleogene warming shown by fish debris oxygen isotopes (El Kef, Tunisia)
	MacLeod K.G.; Quinton P.C.; Sepúlveda J.; Negra M.H.
发表日期	2018
ISSN	0036-8075
起始页码	1467
结束页码	1469
卷号	360 期号:6396
英文摘要	Greenhouse warming is a predicted consequence of the Chicxulub impact, but supporting data are sparse. This shortcoming compromises understanding of the impact’s effects, and it has persisted due to an absence of sections that both contain suitable material for traditional carbonate- or organic-based paleothermometry and are complete and expanded enough to resolve changes on short time scales. We address the problem by analyzing the oxygen isotopic composition of fish debris, phosphatic microfossils that are relatively resistant to diagenetic alteration, from the Global Stratotype Section and Point for the Cretaceous/Paleogene boundary at El Kef, Tunisia. We report an ~1 per mil decrease in oxygen isotopic values (~5°C warming) beginning at the boundary and spanning ~300 centimeters of section (~100,000 years). The pattern found matches expectations for impact-initiated greenhouse warming. 2017 © The Authors.
英文关键词	carbonic acid; oxygen 18; phosphate; oxygen; Cretaceous; Cretaceous-Paleogene boundary; diagenesis; isotopic composition; microfossil; oxygen isotope; Paleogene; warming; animal tissue; Article; environmental impact; environmental impact assessment; fish; greenhouse effect; microfossil; molecular genetics; nonhuman; Paleogene; priority journal; thermometry; Tunisia; warming; animal; fish; fossil; species extinction; temperature; Kef; Tunisia; Animals; Extinction, Biological; Fishes; Fossils; Global Warming; Greenhouse Effect; Oxygen Isotopes; Temperature; Tunisia
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/244613
作者单位	Department of Geological Sciences, University of Missouri, Columbia, MO, United States; Department of Geology, SUNY Potsdam, Potsdam, NY, United States; Department of Geological Sciences, Institute of Arctic and Alpine Research, University of Colorado Boulder, Boulder, CO, United States; Department of Geology, Faculty of Sciences of Tunis, University of Tunis El Manar, 2092 Manar II, Tunis, Tunisia
推荐引用方式 GB/T 7714	MacLeod K.G.,Quinton P.C.,Sepúlveda J.,et al. Postimpact earliest Paleogene warming shown by fish debris oxygen isotopes (El Kef, Tunisia)[J],2018,360(6396).
APA	MacLeod K.G.,Quinton P.C.,Sepúlveda J.,&Negra M.H..(2018).Postimpact earliest Paleogene warming shown by fish debris oxygen isotopes (El Kef, Tunisia).Science,360(6396).
MLA	MacLeod K.G.,et al."Postimpact earliest Paleogene warming shown by fish debris oxygen isotopes (El Kef, Tunisia)".Science 360.6396(2018).