PP43D:
The Role of Meltwater in Abrupt Climate Change: From the Arctic to Antarctic II Posters


Session ID#: 7845

Session Description:
The discharge of meltwater and icebergs to the polar oceans is known to have a major impact on global ocean circulation and may be critical in forcing abrupt climate change; however the mechanisms remain unclear. Recent work has highlighted that meltwater inputs far beyond the North Atlantic can have a significant effect on global climate. As the Greenland and Antarctic ice sheets continue melting, it is essential to understand how changes in freshwater influence ocean circulation and climate. This session will bring together results from numerical modeling, instrumental, and proxy studies investigating the role of freshwater in driving abrupt climate shifts during varying time periods. We encourage submissions from high-resolution models, new geochemical proxies, records of iceberg transport and meltwater pathways, and innovative studies focusing on freshwater forcing in subtropical and/or tropical latitudes and other far-field sites, including the Arctic, Antarctic and Pacific, in addition to traditional North Atlantic records.
Primary Convener:  Jenna C Hill, Coastal Carolina University, Conway, United States
Convener:  Alan Condron, University of Massachusetts Amherst, Amherst, MA, United States
Chairs:  Jenna C Hill, Coastal Carolina University, Conway, United States and Alan Condron, University of Massachusetts Amherst, Amherst, MA, United States
OSPA Liaison:  Jenna C Hill, Coastal Carolina University, Conway, United States
Co-Organized with:
Paleoceanography and Paleoclimatology, and Ocean Sciences

Cross-Listed:
  • GC - Global Environmental Change
  • OS - Ocean Sciences
Index Terms:

1635 Oceans [GLOBAL CHANGE]
3045 Seafloor morphology, geology, and geophysics [MARINE GEOLOGY AND GEOPHYSICS]
4901 Abrupt/rapid climate change [PALEOCEANOGRAPHY]
4928 Global climate models [PALEOCEANOGRAPHY]

Abstracts Submitted to this Session:

Greenland Meltwater and Arctic Circulation Regimes (59633)
Dmitry S Dukhovskoy, Florida State University, Tallahassee, FL, United States, Andrey Yu Proshutinsky, Woods Hole Oceanographic Institution, Physical Oceanography, Woods Hole, MA, United States, Mary-Louise Timmermans, Yale University, Geology and Geophysics, New Haven, CT, United States, Paul Glen Myers, University of Alberta, Department of Earth and Atmospheric Sciences, Edmonton, AB, Canada and Gennady Platov, ICMMG, Novosibirsk, Russia
Impact of Greenland Ice Sheet Melt on the Atlantic Meridional Overturning Circulation in GFDL ESM2Mb (85190)
Rebecca Lynn Beadling, University of Arizona, Tucson, United States, Jianjun Yin, University of Arizona, Tucson, AZ, United States, Pepijn Bakker, Vrije Universiteit Amsterdam, Earth Sciences, Amsterdam, Netherlands and Ronald J Stouffer, Geophysical Fluid Dynamics Laboratory, Princeton, NJ, United States
Influence of the freshwater forcing pathway on the AMOC during 8.2k event (63263)
Aixue Hu1, Bette L Otto-Bliesner2, Justin Small1 and Nan A Rosenbloom3, (1)National Center for Atmospheric Research, Boulder, CO, United States, (2)NSF National Center for Atmospheric Research, Boulder, United States, (3)National Center for Atmospheric Research, Boulder, United States
Could massive Arctic sea ice export to the North Atlantic be the real cause of abrupt climate change during the last deglaciation? (63985)
Anthony John Coletti and Alan Condron, University of Massachusetts Amherst, Amherst, MA, United States
Marine Palynological Records From the Eastern Canadian Margin Suggest Multiple Meltwater Sources at the Time of the Younger Dryas (66393)
Elisabeth Levac, Bishop's University, Environment and Geography, Sherbrooke, QC, Canada and Michael C F Lewis, Natural Resources Canada, Geological Survey of Canada, Dartmouth, NS, Canada
New sedimentological evidence supporting a catastrophic meltwater discharge event along the Beaufort margin, Arctic Ocean (75473)
Shannon Klotsko1, Neal W Driscoll2, Lloyd D Keigwin3 and Brendon Mendenhall1, (1)Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA, United States, (2)Scripps Institution of Oceanog, La Jolla, CA, United States, (3)Woods Hole Oceanographic Institution, Woods Hole, MA, United States
Subtropical iceberg scours: Tracking the path of meltwater in the deglacial North Atlantic (70701)
Jenna C Hill, Coastal Carolina University, Conway, United States and Alan Condron, University of Massachusetts Amherst, Amherst, MA, United States
A High-Resolution Labrador Sea Surface and Subsurface Water Foraminiferal δ18O Record and its Relation to Heinrich Events. (75754)
Zoe E Brown, Mount Holyoke College, South Hadley, MA, United States, Jeremy S Hoffman, PhD, Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, United States and Peter U Clark, Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States
An isotopic perspective on the correlation of surface ocean carbon dynamics and sea ice melting in Prydz Bay (Antarctica) during austral summer (70778)
Run Zhang1, Minfang Zheng1, Min Chen1,2, Qiang Ma1, Jianping Cao1 and Yusheng Qiu1,2, (1)Xiamen University, Xiamen, China, (2)State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, China

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