气候变化领域集成服务门户(CCPortal): The enigma of Oligocene climate and global surface temperature evolution

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DOI	10.1073/pnas.2003914117
	The enigma of Oligocene climate and global surface temperature evolution
	O'Brien C.L.; Huber M.; Thomas E.; Pagani M.; Super J.R.; Elder L.E.; Hull P.M.
发表日期	2020
ISSN	0027-8424
起始页码	25302
结束页码	25309
卷号	117 期号:41
英文摘要	Falling atmospheric CO2levels led to cooling through the Eocene and the expansion of Antarctic ice sheets close to their modern size near the beginning of the Oligocene, a period of poorly documented climate. Here, we present a record of climate evolution across the entire Oligocene (33.9 to 23.0 Ma) based on TEX86sea surface temperature (SST) estimates from southwestern Atlantic Deep Sea Drilling Project Site 516 (paleolatitude ~36°S) and western equatorial Atlantic Ocean Drilling Project Site 929 (paleolatitude ~0°), combined with a compilation of existing SST records and climate modeling. In this relatively low CO2 Oligoceneworld (~300 to 700 ppm), warm climates similar to those of the late Eocene continued with only brief interruptions, while the Antarctic ice sheet waxed and waned. SSTs are spatially heterogenous, but generally support late Oligocene warming coincident with declining atmospheric CO2. This Oligocene warmth, especially at high latitudes, belies a simple relationship between climate and atmospheric CO2and/or ocean gateways, and is only partially explained by current climate models. Although the dominant climate drivers of this enigmatic Oligocene world remain unclear, our results help fill a gap in understanding past Cenozoic climates and the way long-term climate sensitivity responded to varying background climate states. © 2020 National Academy of Sciences. All rights reserved.
英文关键词	Climate models; Eocene-Oligocene; Proxy reconstructions; Sea surface temperatures; TEX86
语种	英语
scopus关键词	Article; atmosphere; carbon dioxide evolution; climate change; environmental factor; environmental monitoring; environmental parameters; geographic distribution; latitude; Oligocene; priority journal; sea surface temperature
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160213
作者单位	O'Brien, C.L., Department of Geology and Geophysics, Yale University, New Haven, CT 06511, United States, UCL Department of Geography, University College London, London, WC1E 6BT, United Kingdom; Huber, M., Department of Earth, Atmospheric and Planetary Sciences, Purdue University, West Lafayette, IN 47907, United States; Thomas, E., Department of Geology and Geophysics, Yale University, New Haven, CT 06511, United States, Department of Earth and Environmental Sciences, Wesleyan University, Middletown, CT 06459, United States; Pagani, M., Department of Geology and Geophysics, Yale University, New Haven, CT 06511, United States; Super, J.R., Department of Geology and Geophysics, Yale University, New Haven, CT 06511, United States; Elder, L.E., Department of Geology and Geophysics, Yale University, New Haven, CT 06511, United States, Museum of Natural History, University of Colorado, Boulder, CO 80309, United States; Hull, P.M., Department of Geology and Geophysics, Yale University, New Haven, CT 0...
推荐引用方式 GB/T 7714	O'Brien C.L.,Huber M.,Thomas E.,et al. The enigma of Oligocene climate and global surface temperature evolution[J],2020,117(41).
APA	O'Brien C.L..,Huber M..,Thomas E..,Pagani M..,Super J.R..,...&Hull P.M..(2020).The enigma of Oligocene climate and global surface temperature evolution.Proceedings of the National Academy of Sciences of the United States of America,117(41).
MLA	O'Brien C.L.,et al."The enigma of Oligocene climate and global surface temperature evolution".Proceedings of the National Academy of Sciences of the United States of America 117.41(2020).