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Title: Meltwater routing and the Younger Dryas

Abstract

The Younger Dryas -- the last major cold episode on Earth -- is generally considered to have been triggered by a meltwater flood into the North Atlantic. The prevailing hypothesis, proposed by Broecker et al. [1989 Nature 341:318–321] more than two decades ago, suggests that an abrupt rerouting of Lake Agassiz overflow through the Great Lakes and St. Lawrence Valley inhibited deep water formation in the subpolar North Atlantic and weakened the strength of the Atlantic Meridional Overturning Circulation (AMOC).More recently, Tarasov and Peltier [2005 Nature 435:662–665] showed that meltwater could have discharged into the Arctic Ocean via the Mackenzie Valley ~4,000 km northwest of the St. Lawrence outlet. Here we use a sophisticated, high-resolution, ocean sea-ice model to study the delivery of meltwater from the two drainage outlets to the deep water formation regions in the North Atlantic. Unlike the hypothesis of Broecker et al., freshwater from the St. Lawrence Valley advects into the subtropical gyre ~3,000 km south of the North Atlantic deep water formation regions and weakens the AMOC by <15%. In contrast, narrow coastal boundary currents efficiently deliver meltwater from the Mackenzie Valley to the deep water formation regions of the subpolar North Atlantic and weakenmore » the AMOC by >30%. We conclude that meltwater discharge from the Arctic, rather than the St. Lawrence Valley, was more likely to have triggered the Younger Dryas cooling.« less

Authors:
 [1];  [2]
  1. Univ. of Massachusetts, Amherst, MA (United States). Dept. of Geosciences, Climate System Research Center
  2. Univ. of Alaska, Fairbanks, AK (United States). Inst. of Marine Science, School of Fisheries and Ocean Sciences
Publication Date:
Research Org.:
Univ. of Alaska, Fairbanks, AK (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1105906
Grant/Contract Number:  
FG02-09ER64725
Resource Type:
Accepted Manuscript
Journal Name:
Proceedings of the National Academy of Sciences of the United States of America
Additional Journal Information:
Journal Volume: 109; Journal Issue: 49; Journal ID: ISSN 0027-8424
Publisher:
National Academy of Sciences, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES

Citation Formats

Condron, Alan, and Winsor, Peter. Meltwater routing and the Younger Dryas. United States: N. p., 2012. Web. doi:10.1073/pnas.1207381109.
Condron, Alan, & Winsor, Peter. Meltwater routing and the Younger Dryas. United States. doi:10.1073/pnas.1207381109.
Condron, Alan, and Winsor, Peter. Tue . "Meltwater routing and the Younger Dryas". United States. doi:10.1073/pnas.1207381109. https://www.osti.gov/servlets/purl/1105906.
@article{osti_1105906,
title = {Meltwater routing and the Younger Dryas},
author = {Condron, Alan and Winsor, Peter},
abstractNote = {The Younger Dryas -- the last major cold episode on Earth -- is generally considered to have been triggered by a meltwater flood into the North Atlantic. The prevailing hypothesis, proposed by Broecker et al. [1989 Nature 341:318–321] more than two decades ago, suggests that an abrupt rerouting of Lake Agassiz overflow through the Great Lakes and St. Lawrence Valley inhibited deep water formation in the subpolar North Atlantic and weakened the strength of the Atlantic Meridional Overturning Circulation (AMOC).More recently, Tarasov and Peltier [2005 Nature 435:662–665] showed that meltwater could have discharged into the Arctic Ocean via the Mackenzie Valley ~4,000 km northwest of the St. Lawrence outlet. Here we use a sophisticated, high-resolution, ocean sea-ice model to study the delivery of meltwater from the two drainage outlets to the deep water formation regions in the North Atlantic. Unlike the hypothesis of Broecker et al., freshwater from the St. Lawrence Valley advects into the subtropical gyre ~3,000 km south of the North Atlantic deep water formation regions and weakens the AMOC by <15%. In contrast, narrow coastal boundary currents efficiently deliver meltwater from the Mackenzie Valley to the deep water formation regions of the subpolar North Atlantic and weaken the AMOC by >30%. We conclude that meltwater discharge from the Arctic, rather than the St. Lawrence Valley, was more likely to have triggered the Younger Dryas cooling.},
doi = {10.1073/pnas.1207381109},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
number = 49,
volume = 109,
place = {United States},
year = {2012},
month = {12}
}

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Cited by: 33 works
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Works referenced in this record:

Routing of meltwater from the Laurentide Ice Sheet during the Younger Dryas cold episode
journal, September 1989

  • Broecker, Wallace S.; Kennett, James P.; Flower, Benjamin P.
  • Nature, Vol. 341, Issue 6240
  • DOI: 10.1038/341318a0

A new Greenland ice core chronology for the last glacial termination
journal, January 2006

  • Rasmussen, S. O.; Andersen, K. K.; Svensson, A. M.
  • Journal of Geophysical Research, Vol. 111, Issue D6
  • DOI: 10.1029/2005JD006079

Laurentide Ice Sheet Meltwater Recorded in Gulf of Mexico Deep-Sea Cores
journal, April 1975


Geochemical proxies of North American freshwater routing during the Younger Dryas cold event
journal, April 2007

  • Carlson, A. E.; Clark, P. U.; Haley, B. A.
  • Proceedings of the National Academy of Sciences, Vol. 104, Issue 16
  • DOI: 10.1073/pnas.0611313104

Reduced meltwater outflow from the Laurentide ice margin during the Younger Dryas
journal, June 1996

  • de Vernal, Anne; Hillaire-Marcel, Claude; Bilodeau, Guy
  • Nature, Vol. 381, Issue 6585
  • DOI: 10.1038/381774a0

Rapid climate change and Arctic Ocean freshening: COMMENT and REPLY: REPLY
journal, December 2007

  • Peltier, W. R.; de Vernal, A.; Hillaire-Marcel, C.
  • Geology, Vol. 36, Issue 1
  • DOI: 10.1130/G24971Y.1

Arctic freshwater forcing of the Younger Dryas cold reversal
journal, June 2005


Atlantic meridional overturning and climate response to Arctic Ocean freshening
journal, January 2006

  • Peltier, W. R.; Vettoretti, G.; Stastna, M.
  • Geophysical Research Letters, Vol. 33, Issue 6
  • DOI: 10.1029/2005GL025251

GEOLOGY: Was the Younger Dryas Triggered by a Flood?
journal, May 2006


Identification of Younger Dryas outburst flood path from Lake Agassiz to the Arctic Ocean
journal, April 2010

  • Murton, Julian B.; Bateman, Mark D.; Dallimore, Scott R.
  • Nature, Vol. 464, Issue 7289
  • DOI: 10.1038/nature08954

A finite-volume, incompressible Navier Stokes model for studies of the ocean on parallel computers
journal, March 1997

  • Marshall, John; Adcroft, Alistair; Hill, Chris
  • Journal of Geophysical Research: Oceans, Vol. 102, Issue C3
  • DOI: 10.1029/96JC02775

Coupled ocean-atmosphere model response to freshwater input: Comparison to Younger Dryas Event
journal, April 1997

  • Manabe, Syukuro; Stouffer, Ronald J.
  • Paleoceanography, Vol. 12, Issue 2
  • DOI: 10.1029/96PA03932

Collapse and rapid resumption of Atlantic meridional circulation linked to deglacial climate changes
journal, April 2004

  • McManus, J. F.; Francois, R.; Gherardi, J. -M.
  • Nature, Vol. 428, Issue 6985
  • DOI: 10.1038/nature02494

Investigating the Causes of the Response of the Thermohaline Circulation to Past and Future Climate Changes
journal, April 2006

  • Stouffer, R. J.; Yin, J.; Gregory, J. M.
  • Journal of Climate, Vol. 19, Issue 8
  • DOI: 10.1175/JCLI3689.1

Warming of the subpolar Atlantic triggered by freshwater discharge at the continental boundary: N. ATLANTIC WARMING BY FRESHWATER
journal, August 2007

  • Saenko, Oleg A.; Weaver, Andrew J.; Robitaille, Daniel Y.
  • Geophysical Research Letters, Vol. 34, Issue 15
  • DOI: 10.1029/2007GL030674

A systematic study of the impact of freshwater pulses with respect to different geographical locations
journal, May 2009


Freshwater sources to the coastal ocean off northeastern North America: Evidence from H 2 18 O/H 2 16 O
journal, August 1999

  • Khatiwala, Samar P.; Fairbanks, Richard G.; Houghton, Robert W.
  • Journal of Geophysical Research: Oceans, Vol. 104, Issue C8
  • DOI: 10.1029/1999JC900155

Freshwater export from the Labrador Current to the North Atlantic Current at the Tail of the Grand Banks of Newfoundland
journal, February 2010

  • Fratantoni, Paula S.; McCartney, Michael S.
  • Deep Sea Research Part I: Oceanographic Research Papers, Vol. 57, Issue 2
  • DOI: 10.1016/j.dsr.2009.11.006

Simulated Response of the Arctic Freshwater Budget to Extreme NAO Wind Forcing
journal, May 2009


Temporal Variability of the Atlantic Meridional Overturning Circulation at 26.5 N
journal, August 2007


Freshwater Forcing of Abrupt Climate Change During the Last Glaciation
journal, July 2001


Open-ocean convection: Observations, theory, and models
journal, February 1999

  • Marshall, John; Schott, Friedrich
  • Reviews of Geophysics, Vol. 37, Issue 1
  • DOI: 10.1029/98RG02739

Interannual changes in the overflow from the Nordic Seas into the Atlantic Ocean through Denmark Strait
journal, January 2005


    Works referencing / citing this record:

    Acceleration of Northern Ice Sheet Melt Induces AMOC Slowdown and Northern Cooling in Simulations of the Early Last Deglaciation
    journal, July 2018

    • Ivanovic, R. F.; Gregoire, L. J.; Burke, A.
    • Paleoceanography and Paleoclimatology
    • DOI: 10.1029/2017pa003308

    Climate response to the meltwater runoff from Greenland ice sheet: evolving sensitivity to discharging locations
    journal, November 2017


    Reconstruction of North American drainage basins and river discharge since the Last Glacial Maximum
    journal, January 2016


    Sediment Provenance Changes in the Western Arctic Ocean in Response to Ice Rafting, Sea Level, and Oceanic Circulation Variations Since the Last Deglaciation
    journal, July 2018

    • Deschamps, Charles-Edouard; Montero-Serrano, Jean-Carlos; St-Onge, Guillaume
    • Geochemistry, Geophysics, Geosystems, Vol. 19, Issue 7
    • DOI: 10.1029/2017gc007411

    Deglacial floods in the Beaufort Sea preceded Younger Dryas cooling
    journal, July 2018


    Climate response to the meltwater runoff from Greenland ice sheet: evolving sensitivity to discharging locations
    journal, November 2017


    Sediment Provenance Changes in the Western Arctic Ocean in Response to Ice Rafting, Sea Level, and Oceanic Circulation Variations Since the Last Deglaciation
    journal, July 2018

    • Deschamps, Charles-Edouard; Montero-Serrano, Jean-Carlos; St-Onge, Guillaume
    • Geochemistry, Geophysics, Geosystems, Vol. 19, Issue 7
    • DOI: 10.1029/2017gc007411

    Acceleration of Northern Ice Sheet Melt Induces AMOC Slowdown and Northern Cooling in Simulations of the Early Last Deglaciation
    journal, July 2018

    • Ivanovic, R. F.; Gregoire, L. J.; Burke, A.
    • Paleoceanography and Paleoclimatology
    • DOI: 10.1029/2017pa003308

    Deglacial floods in the Beaufort Sea preceded Younger Dryas cooling
    journal, July 2018


    Reconstruction of North American drainage basins and river discharge since the Last Glacial Maximum
    journal, January 2016


    Inferring surface water equilibrium calcite δ 18 O during the last deglacial period from benthic foraminiferal records: Implications for ocean circulation
    journal, November 2015

    • Amrhein, Daniel E.; Gebbie, Geoffrey; Marchal, Olivier
    • Paleoceanography, Vol. 30, Issue 11
    • DOI: 10.1002/2014pa002743

    Consequences of future increased Arctic runoff on Arctic Ocean stratification, circulation, and sea ice cover
    journal, January 2016

    • Nummelin, Aleksi; Ilicak, Mehmet; Li, Camille
    • Journal of Geophysical Research: Oceans, Vol. 121, Issue 1
    • DOI: 10.1002/2015jc011156

    Collapse of the North American ice saddle 14,500 years ago caused widespread cooling and reduced ocean overturning circulation: Ice Collapse Caused Cooling ~14.5 ka
    journal, January 2017

    • Ivanovic, Ruza F.; Gregoire, Lauren J.; Wickert, Andrew D.
    • Geophysical Research Letters, Vol. 44, Issue 1
    • DOI: 10.1002/2016gl071849

    North Atlantic forcing of tropical Indian Ocean climate
    journal, April 2014

    • Mohtadi, Mahyar; Prange, Matthias; Oppo, Delia W.
    • Nature, Vol. 509, Issue 7498
    • DOI: 10.1038/nature13196

    Subtropical iceberg scours and meltwater routing in the deglacial western North Atlantic
    journal, October 2014

    • Hill, Jenna C.; Condron, Alan
    • Nature Geoscience, Vol. 7, Issue 11
    • DOI: 10.1038/ngeo2267

    Transient climate simulations of the deglaciation 21–9 thousand years before present (version 1) – PMIP4 Core experiment design and boundary conditions
    journal, January 2016

    • Ivanovic, Ruza F.; Gregoire, Lauren J.; Kageyama, Masa
    • Geoscientific Model Development, Vol. 9, Issue 7
    • DOI: 10.5194/gmd-9-2563-2016