DOI: 10.1016/j.quascirev.2015.07.012
Scopus记录号: 2-s2.0-84945448537
论文题名: Termination-II interstadial/stadial climate change recorded in two stalagmites from the north European Alps
作者: Moseley G.E. ; Spötl C. ; Cheng H. ; Boch R. ; Min A. ; Edwards R.L.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2015
卷: 127 起始页码: 229
结束页码: 239
语种: 英语
英文关键词: Bølling/Allerød-Younger Dryas
; Last interglacial
; Millennial-scale climate change
; North Atlantic
; Paleoclimatology
; Quaternary
; Speleothem
; Stable isotopes
; Termination II
; U-Th dating
Scopus关键词: Atmospheric thermodynamics
; Climatology
; Geochronology
; Glacial geology
; Isotopes
; Oceanography
; Last interglacial
; North Atlantic
; Paleoclimatology
; Quaternary
; Speleothem
; Stable isotopes
; Termination II
; Younger Dryas
; Climate change
; climate variation
; interstadial
; Last Interglacial
; paleoclimate
; proxy climate record
; speleothem
; stable isotope
; stalagmite
; uranium series dating
; Alps
; Atlantic Ocean
; Atlantic Ocean (North)
英文摘要: Understanding the sequence of events that take place during glacial-interglacial climate transitions is important for improving our knowledge of abrupt climate change. Here, we present a new stacked, high-resolution, precisely-dated speleothem stable isotope record from the northern Alps, which provides an important record of temperature and moisture-source changes between 134 and 111 ka for Europe and the wider North Atlantic realm. The record encompasses the penultimate deglaciation (Termination II (TII)), which lies beyond the limit of radiocarbon dating, thus providing an important new archive for a crucial period of rapid paleoclimate change. Warmer and wetter ice-free conditions were achieved by 134.1 ± 0.7 ka (modelled ages) as indicated by the presence of liquid water at the site. Temperatures warmed further at 133.7 ± 0.5 ka and led into an interstadial, synchronous with slightly elevated monsoon strength during the week monsoon interval. The interstadial experienced an unstable climate with a trough in temperature associated with a slowdown in Atlantic Meridional Overturning Circulation (AMOC) and a reduction in North Atlantic Deep Water (NADW) formation. The interstadial ended with a more extreme cold reversal lasting 500 years in which NADW formation remained active but the subpolar gyre weakened allowing cool polar waters to penetrate southwards. The main warming associated with TII was very rapid, taking place between 130.9 ± 0.9 and 130.7 ± 0.9 ka coeval with initial monsoon strengthening. Temperatures then plateaued before being interrupted by a 600-year cold event at 129.1 ± 0.6 ka, associated once again with penetration of polar waters southwards into the North Atlantic and a slowdown in monsoon strengthening. Sub-orbital climate oscillations were thus a feature of TII in the north Atlantic realm, which broadly resemble the Bølling/Allerød-Younger Dryas-8.2 ka event pattern of change observed in Termination I despite monsoon records indicating strong differences between the last and penultimate deglaciation. © 2015 The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59795
Appears in Collections: 过去全球变化的重建
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作者单位: Institute of Geology, University of Innsbruck, Innrain 52, Innsbruck, Austria; Department of Earth Sciences, University of Minnesota, 310 Pillsbury Drive SE, Minneapolis, United States; Institute of Global Environmental Change, Xi'an Jiaotong University, Xi'an, China; Institute of Applied Geosciences, Graz University of Technology, Graz, Austria
Recommended Citation:
Moseley G.E.,Spötl C.,Cheng H.,et al. Termination-II interstadial/stadial climate change recorded in two stalagmites from the north European Alps[J]. Quaternary Science Reviews,2015-01-01,127