PP13C:
Abrupt Climate Change: Causes, Mechanisms, and Consequences II

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Session ID#: 17683

Session Description:
Abrupt climate changes have occurred throughout the Late Quaternary, in both glacial and interglacial states, and may offer important insights on future climate change. Yet there is debate about their cause, the mechanisms involved, and their wider consequences. New high resolution paleoclimate records are revealing increasing complexity both within and between past abrupt climate events. Meanwhile, recent modelling studies have explored potential drivers other than freshwater, such as volcanic eruptions and ice sheet topography. This session invites contributions that address questions such as: What does it take to cause an abrupt climate event in a glacial or interglacial state? What differentiates Heinrich from non-Heinrich stadials? What caused the abrupt jumps in atmospheric CO2 and CH4 during stadials? What were the impacts of abrupt climate events on ocean and terrestrial carbon storage? We welcome proposals from all fields of the paleoclimate data and modelling community, including terrestrial, marine, and ice settings.
Primary Convener:  David J Thornalley, University College London, Dept. of Geography, London, United Kingdom; WHOI, Geology and Geophysics, Woods Hole, United States
Conveners:  Meredith A Kelly, Dartmouth College, Department of Earth Sciences, Hanover, United States, Shaun A Marcott, University of Wisconsin Madison, Department of Geoscience, Madison, United States and Feng He, University of Wisconsin-Madison, Center for Climatic Research, Madison, United States
Chairs:  David J Thornalley, University College London, Dept. of Geography, London, United Kingdom; WHOI, Geology and Geophysics, Woods Hole, United States, Meredith A Kelly, Dartmouth College, Department of Earth Sciences, Hanover, United States, Feng He, University of Wisconsin-Madison, Center for Climatic Research, Madison, United States and Shaun A Marcott, University of Wisconsin Madison, Department of Geoscience, Madison, United States
OSPA Liaison:  David J Thornalley, University College London, Dept. of Geography, London, United Kingdom; WHOI, Geology and Geophysics, Woods Hole, United States
Index Terms:

1605 Abrupt/rapid climate change [GLOBAL CHANGE]
1616 Climate variability [GLOBAL CHANGE]
1620 Climate dynamics [GLOBAL CHANGE]
4901 Abrupt/rapid climate change [PALEOCEANOGRAPHY]

Abstracts Submitted to this Session:

Coherent Sea Ice Variations in the Nordic Seas and Abrupt Greenland Climate Changes over Dansgaard-Oeschger Cycles (163920)
Henrik Sadatzki1,2, Sarah Berben2,3, Trond Dokken4,5, Rüdiger Stein6, Kirsten Fahl7 and Eystein Jansen1,2, (1)University of Bergen, Bergen, Norway, (2)Bjerknes Centre for Climate Research, Bergen, Norway, (3)University of Bergen, Department of Earth Science, Bergen, Norway, (4)NORCE Norwegian Research Centre AS, Bjerknes Centre for Climate Research, Bergen, Norway, (5)Uni Research Climate, Bergen, Norway, (6)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Bremerhaven, Germany, (7)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Marine Geology, Bremerhaven, Germany
Gradual Warming in the North Atlantic during D-O Events Synchronous with Antarctic and Southern Hemisphere Warmings (Invited) (147067)
Tine Lander Rasmussen, The Arctic University of Norway, Department of Geology, Tromsø, Norway, Erik Thomsen, Aarhus University, Geoscience, Aarhus, Denmark and Matthias Moros, Leibniz Institute for Baltic Sea Research Warnemuende (IOW), Rostock, Germany
Productivity Pulses and Rapid Climate Change in the North Atlantic (191592)
James William Buchanan Rae, University of St Andrews, School of Earth and Environmental Sciences, St Andrews, KY16, United Kingdom, David Thornalley, Woods Hole Oceanographic Institution, Woods Hole, MA, United States, Andrea Burke, University of St Andrews, School of Earth and Environmental Sciences, St Andrews, United Kingdom, Rosanna Greenop, University of Southampton, Morpeth, United Kingdom, Karen Elizabeth Kohfeld, Simon Fraser University, School of Resource and Environmental Management and School of Environmental Science, Burnaby, Canada and Rhian Laura Rees-Owen, University of Leeds, Leeds, United Kingdom
Reconstructing Deep Ocean Circulation in the North Atlantic from Bermuda Rise, and Beyond (Invited) (178151)
Jerry F McManus, Columbia University, Earth and Environmental Sciences, New York, United States; Lamont-Doherty Earth Observatory, Palisades, United States
Foraminiferal δ13C Evidence for a Biological Pump Driver of Atmospheric CO2 Rise during Heinrich Stadial 1 (139820)
Jennifer E Hertzberg, Texas A & M University College Station, College Station, TX, United States, David C Lund, University of CT at Avery Point, Groton, United States and Andreas Schmittner, Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, United States
Increased Drake Passage through-flow triggered abrupt re-invigoration of Atlantic Overturning Circulation during the last deglaciation (155593)
Jenny Roberts, Alfred Wegener Institute, Helmholtz Center for Polar and Marine Research (AWI), Marine Geology, 27568 Bremerhaven, Germany, I. Nicholas McCave, University of Cambridge, Earth Sciences, Cambridge, United Kingdom, Erin McClymont, University of Durham, Durham, United Kingdom, Sev Kender, University of Nottingham, Department of Geography, Nottingham, United Kingdom, Claus-Dieter Hillenbrand, British Antarctic Survey, Cambridge, United Kingdom, Ricardo P Matano, Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, United States, David A Hodell, University of Cambridge, Godwin Laboratory for Palaeoclimate Research, Department of Earth Sciences, Cambridge, United Kingdom and Vicky L Peck, NERC British Antarctic Survey, Cambridge, United Kingdom
Covariation of deglacial North Pacific intermediate water ventilation and atmospheric CO2 evidenced by authigenic neodymium isotope composition (178759)
Jianghui Du1, Brian A Haley2 and Alan C Mix2, (1)ETH Zurich, Institute of Geochemistry and Petrology, Zurich, Switzerland, (2)Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, United States
Synthesis of North Pacific oxygen fluctuations during the climate transitions of the last 20,000 years (160655)
Sarah E Myhre, University of Washington, School of Oceanography, Seattle, United States; University of Washington, Future of Ice Initiative, Seattle, United States, Catherine V Davis, University of California Davis, Department of Earth and Planetary Sciences, Davis, CA, United States, Marisa Julia Borreggine, University of Washington Seattle Campus, School of Oceanography, Seattle, WA, United States, Russell Moffitt, Marine Conservation Institute, Washington, DC, United States and Curtis A. Deutsch, University of Washington Seattle Campus, School of Oceanography, Seattle, United States

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