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Regional and global forcing of glacier retreat during the last deglaciation

Journal Article · · Nature Communications
DOI:https://doi.org/10.1038/ncomms9059· OSTI ID:1565327
 [1];  [2];  [3];  [4];  [5];  [6]
  1. Boston College, Chestnut Hill, MA (United States). Dept. of Earth and Environmental Sciences
  2. Oregon State Univ., Corvallis, OR (United States). College of Earth, Ocean, and Atmospheric Sciences
  3. Univ. of Wisconsin, Madison, WI (United States). Nelson Inst. for Environmental Studies; Oregon State Univ., Corvallis, OR (United States). College of Earth, Ocean, and Atmospheric Sciences
  4. Purdue Univ., West Lafayette, IN (United States)
  5. Univ. of Wisconsin, Madison, WI (United States). Nelson Inst. for Environmental Studies
  6. National Center for Atmospheric Research, Boulder, CO (United States). Climate and Global Dynamics Division
The ongoing retreat of glaciers globally is one of the clearest manifestations of recent global warming associated with rising greenhouse gas concentrations. By comparison, the importance of greenhouse gases in driving glacier retreat during the most recent deglaciation, the last major interval of global warming, is unclear due to uncertainties in the timing of retreat around the world. Here we use recently improved cosmogenic-nuclide production-rate calibrations to recalculate the ages of 1,116 glacial boulders from 195 moraines that provide broad coverage of retreat in mid-to-low-latitude regions. This revised history, in conjunction with transient climate model simulations, suggests that while several regional-scale forcings, including insolation, ice sheets and ocean circulation, modulated glacier responses regionally, they are unable to account for global-scale retreat, which is most likely related to increasing greenhouse gas concentrations.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF)
Sponsoring Organization:
National Science Foundation (NSF); USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1565327
Journal Information:
Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 6; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (4)

Southern Ocean warming and Wilkes Land ice sheet retreat during the mid-Miocene journal January 2018
Glacier-based climate reconstructions for the last glacial-interglacial transition: Arthur's Pass, New Zealand (43°S): LAST GLACIAL-INTERGLACIAL TRANSITION, NEW ZEALAND journal November 2016
10Be age constraints on latest Pleistocene and Holocene cirque glaciation across the western United States journal January 2019
Climate during the Last Glacial Maximum in the Northern Sawatch Range, Colorado, USA journal October 2019

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