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Author:

Moseley, Gina E. (Moseley, Gina E..) | Spoetl, Christoph (Spoetl, Christoph.) | Cheng, Hai (Cheng, Hai.) (Scholars:程海) | Boch, Ronny (Boch, Ronny.) | Min, Angela (Min, Angela.) | Edwards, R. Lawrence (Edwards, R. Lawrence.)

Indexed by:

SCIE EI Scopus

Abstract:

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 sub-polar gyre weakened allowing cool polar waters to penetrate southwards. The main warming associated with TIT 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 Bolling/Allerod-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. (C) 2015 The Authors. Published by Elsevier Ltd.

Keyword:

Bolling/Allerod-Younger Dryas Last interglacial Millennial-scale climate change North Atlantic Paleoclimatology Quaternary Speleothem Stable isotopes Termination II U-Th dating

Author Community:

  • [ 1 ] [Moseley, Gina E.; Spoetl, Christoph; Boch, Ronny] Univ Innsbruck, Inst Geol, A-6020 Innsbruck, Austria
  • [ 2 ] [Cheng, Hai; Min, Angela; Edwards, R. Lawrence] Univ Minnesota, Dept Earth Sci, Minneapolis, MN 55455 USA
  • [ 3 ] [Cheng, Hai] Xi An Jiao Tong Univ, Inst Global Environm Change, Xian 710049, Peoples R China
  • [ 4 ] [Boch, Ronny] Graz Univ Technol, Inst Appl Geosci, A-8010 Graz, Austria
  • [ 5 ] [Moseley, Gina E.]Univ Innsbruck, Inst Geol, A-6020 Innsbruck, Austria
  • [ 6 ] [Spoetl, Christoph]Univ Innsbruck, Inst Geol, A-6020 Innsbruck, Austria
  • [ 7 ] [Boch, Ronny]Univ Innsbruck, Inst Geol, A-6020 Innsbruck, Austria
  • [ 8 ] [Cheng, Hai]Univ Minnesota, Dept Earth Sci, Minneapolis, MN 55455 USA
  • [ 9 ] [Min, Angela]Univ Minnesota, Dept Earth Sci, Minneapolis, MN 55455 USA
  • [ 10 ] [Edwards, R. Lawrence]Univ Minnesota, Dept Earth Sci, Minneapolis, MN 55455 USA
  • [ 11 ] [Cheng, Hai]Xi An Jiao Tong Univ, Inst Global Environm Change, Xian 710049, Peoples R China
  • [ 12 ] [Boch, Ronny]Graz Univ Technol, Inst Appl Geosci, A-8010 Graz, Austria

Reprint Author's Address:

  • Univ Innsbruck, Inst Geol, Innrain 52, A-6020 Innsbruck, Austria.

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Source :

QUATERNARY SCIENCE REVIEWS

ISSN: 0277-3791

Year: 2015

Volume: 127

Page: 229-239

4 . 5 2 1

JCR@2015

4 . 1 1 2

JCR@2020

ESI Discipline: GEOSCIENCES;

ESI HC Threshold:159

JCR Journal Grade:2

CAS Journal Grade:1

Cited Count:

WoS CC Cited Count: 43

SCOPUS Cited Count: 61

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 4

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