气候变化领域集成服务门户(CCPortal): Terrestrial cooling and changes in hydroclimate in the continental interior of the United States across the Eocene-Oligocene boundary

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DOI	10.1130/B31732.1
	Terrestrial cooling and changes in hydroclimate in the continental interior of the United States across the Eocene-Oligocene boundary
	Fan M.; Ayyash S.A.; Tripati A.; Passey B.H.; Griffith E.M.
发表日期	2018
ISSN	167606
起始页码	1073
结束页码	1084
卷号	130 期号:2021-07-08
英文摘要	One of the most pronounced climate transitions in Earth's history occurred at the Eocene- Oligocene transition, ~34.0-33.6 m.y. ago. Marine sedimentary records indicate a dramatic decline in pCO2 coeval with global cooling during the transition. However, terrestrial records are relatively sparse, with conflicting interpretations of hydroclimate in continental interiors. Here, we provide quantitative constraints on the response of the continental hydroclimate in the western United States across the Eocene-Oligocene boundary by studying clumped isotope temperatures [T(Δ47)], δ13C and δ18O values of vadose carbonates, and δ13C values of bulk organic matter (δ13Corg) in eastern Wyoming. Our results show that T(Δ47) dropped from ~28 °C to ~21 °C, indicating ~7 °C cooling in air temperature, which occurred parallel to the decrease in atmospheric pCO2 during the latest Eocene-early Oligocene. We find that aridity and the biome were stable, and ice-volume-corrected precipitation δ18O decreased ~1.6‰ across the Eocene- Oligocene boundary, attributable to reduced vapor condensation temperatures. These new quantitative data add to the growing body of evidence suggesting a marked terrestrial response in temperature and hydroclimate across the Eocene-Oligocene transition. Our findings indicate a pattern of greenhouse-gas- induced global temperature change in the continental interior of the United States that was roughly 1.5-2× the magnitude of cooling in the global ocean. © 2018 The Authors.
语种	英语
来源期刊	Bulletin of the Geological Society of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185022
作者单位	Department of Earth and Environmental Sciences, The University of Texas at Arlington, 500 Yates Street, Arlington, TX 76019, United States; Department of Earth, Planetary and Space Sciences, University of California-Los Angeles, United States; Department of Atmospheric and Oceanic Sciences, Institute of the Environment and Sustainability, 595 Charles E Young Drive E, Los Angeles, CA 90095, United States; European Institute of Marine Sciences (IUEM), Université de Bretagne Occidentale, UMR 6538/6539, L'Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), Rue Dumont D'Urville, Plouzané, 29280, France; Morton K. Blaustein Department of Earth and Planetary Sciences, Johns Hopkins University, 3400 N. Charles Street, Baltimore, MD 21218, United States; School of Earth Sciences, The Ohio State University, 275 Mendenhall Laboratory, 125 South Oval Mall, Columbus, OH 43210, United States; Department of Earth and Environmental Sciences, University of Michigan, Ann Arbor, MI 48109, United States
推荐引用方式 GB/T 7714	Fan M.,Ayyash S.A.,Tripati A.,et al. Terrestrial cooling and changes in hydroclimate in the continental interior of the United States across the Eocene-Oligocene boundary[J],2018,130(2021-07-08).
APA	Fan M.,Ayyash S.A.,Tripati A.,Passey B.H.,&Griffith E.M..(2018).Terrestrial cooling and changes in hydroclimate in the continental interior of the United States across the Eocene-Oligocene boundary.Bulletin of the Geological Society of America,130(2021-07-08).
MLA	Fan M.,et al."Terrestrial cooling and changes in hydroclimate in the continental interior of the United States across the Eocene-Oligocene boundary".Bulletin of the Geological Society of America 130.2021-07-08(2018).