气候变化领域集成服务门户(CCPortal): Coupled evolution of temperature and carbonate chemistry during the Paleocene–Eocene; new trace element records from the low latitude Indian Ocean

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DOI	10.1016/j.epsl.2020.116414
	Coupled evolution of temperature and carbonate chemistry during the Paleocene–Eocene; new trace element records from the low latitude Indian Ocean
	Barnet J.S.K.; Harper D.T.; LeVay L.J.; Edgar K.M.; Henehan M.J.; Babila T.L.; Ullmann C.V.; Leng M.J.; Kroon D.; Zachos J.C.; Littler K.
发表日期	2020
ISSN	0012821X
卷号	545
英文摘要	The early Paleogene represents the most recent interval in Earth's history characterized by global greenhouse warmth on multi-million year timescales, yet our understanding of long-term climate and carbon cycle evolution in the low latitudes, and in particular the Indian Ocean, remains very poorly constrained. Here we present the first long-term sub-eccentricity-resolution stable isotope (δ13C and δ18O) and trace element (Mg/Ca and B/Ca) records spanning the late Paleocene–early Eocene (∼58–53 Ma) across a surface–deep hydrographic reconstruction of the northern Indian Ocean, resolving late Paleocene 405-kyr paced cyclicity and a portion of the PETM recovery. Our new records reveal a long-term warming of ∼4–5 °C at all depths in the water column, with absolute surface ocean temperatures and magnitudes of warming comparable to the low latitude Pacific. As a result of warming, we observe a long-term increase in δ18Osw of the mixed layer, implying an increase in net evaporation. We also observe a collapse in the temperature gradient between mixed layer- and thermocline-dwelling species from ∼57–54 Ma, potentially due to either the development of a more homogeneous water column with a thicker mixed layer, or depth migration of the Morozovella in response to warming. Synchronous warming at both low and high latitudes, along with decreasing B/Ca ratios in planktic foraminifera indicating a decrease in ocean pH and/or increasing dissolved inorganic carbon, suggest that global climate was forced by rising atmospheric CO2 concentrations during this time. © 2020 The Author(s)
关键词	Indian Ocean paleoceanography Paleocene-Eocene Thermal Maximum paleoclimate Paleogene trace elements
英文关键词	Carbon; Earth (planet); Oceanography; CO2 concentration; Coupled evolution; Depth migration; Dissolved inorganic carbon; Global climates; Northern indian oceans; Planktic foraminifera; Stable isotopes; Trace elements; carbon dioxide; carbon emission; carbonate; chemical composition; chemostratigraphy; concentration (composition); Eocene; Paleocene; temperature effect; trace element; Indian Ocean; Foraminifera; Morozovella
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202476
作者单位	Camborne School of Mines, Environment and Sustainability Institute, University of Exeter, Penryn Campus, Cornwall, United Kingdom; Department of Earth and Planetary Sciences, University of California Santa Cruz, Santa Cruz, CA, United States; Department of Geology, The University of Kansas, Lawrence, KS 66045, United States; International Ocean Discovery Program, Texas A&M University, College Station, TX, United States; School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, United Kingdom; GFZ German Research Centre for Geosciences, Section Earth Surface Geochemistry, Telegrafenberg, Potsdam, 14473, Germany; Ocean and Earth Science, National Oceanography Centre Southampton, University of Southampton, Southampton, United Kingdom; NERC Isotope Geosciences Facility, British Geological Survey, Nottingham, NG12 5GG, United Kingdom; Centre for Environmental Geochemistry, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, United Kingdom;...
推荐引用方式 GB/T 7714	Barnet J.S.K.,Harper D.T.,LeVay L.J.,等. Coupled evolution of temperature and carbonate chemistry during the Paleocene–Eocene; new trace element records from the low latitude Indian Ocean[J],2020,545.
APA	Barnet J.S.K..,Harper D.T..,LeVay L.J..,Edgar K.M..,Henehan M.J..,...&Littler K..(2020).Coupled evolution of temperature and carbonate chemistry during the Paleocene–Eocene; new trace element records from the low latitude Indian Ocean.Earth and Planetary Science Letters,545.
MLA	Barnet J.S.K.,et al."Coupled evolution of temperature and carbonate chemistry during the Paleocene–Eocene; new trace element records from the low latitude Indian Ocean".Earth and Planetary Science Letters 545(2020).