DOI: 10.5194/cp-12-837-2016
Scopus记录号: 2-s2.0-84966389925
论文题名: Constraints on ocean circulation at the Paleocene-Eocene Thermal Maximum from neodymium isotopes
作者: Abbott A.N. ; Haley B.A. ; Tripati A.K. ; Frank M.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2016
卷: 12, 期: 4 起始页码: 837
结束页码: 847
语种: 英语
Scopus关键词: air-sea interaction
; benthic foraminifera
; carbon isotope
; climate change
; deep water
; global warming
; Hypsithermal
; neodymium isotope
; oceanic circulation
; paleoceanography
; Paleocene-Eocene boundary
; proxy climate record
; reconstruction
英文摘要: Global warming during the Paleocene-Eocene Thermal Maximum (PETM) ĝ1/4 ĝ€55 million years ago (Ma) coincided with a massive release of carbon to the ocean-atmosphere system, as indicated by carbon isotopic data. Previous studies have argued for a role of changing ocean circulation, possibly as a trigger or response to climatic changes. We use neodymium (Nd) isotopic data to reconstruct short high-resolution records of deep-water circulation across the PETM. These records are derived by reductively leaching sediments from seven globally distributed sites to reconstruct past deep-ocean circulation across the PETM. The Nd data for the leachates are interpreted to be consistent with previous studies that have used fish teeth Nd isotopes and benthic foraminiferal δ13C to constrain regions of convection. There is some evidence from combining Nd isotope and δ13C records that the three major ocean basins may not have had substantial exchanges of deep waters. If the isotopic data are interpreted within this framework, then the observed pattern may be explained if the strength of overturning in each basin varied distinctly over the PETM, resulting in differences in deep-water aging gradients between basins. Results are consistent with published interpretations from proxy data and model simulations that suggest modulation of overturning circulation had an important role for initiation and recovery of the ocean-atmosphere system associated with the PETM. © Author(s) 2016. 资助项目: NSF, National Stroke Foundation
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49033
Appears in Collections: 气候变化与战略
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Recommended Citation:
Abbott A.N.,Haley B.A.,Tripati A.K.,et al. Constraints on ocean circulation at the Paleocene-Eocene Thermal Maximum from neodymium isotopes[J]. Climate of the Past,2016-01-01,12(4)