PP11D:
Abrupt Climate Change: Causes, Mechanisms, and Consequences I

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Session ID#: 17678

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 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:

Connecting the records: exploiting tephra deposits to help understand abrupt climate change (173246)
Siwan Manon Davies1, Peter Michael Abbott2, Anna J Bourne2, Mark Chapman3, Nicholas J G Pearce4, Adam J Griggs2 and Eliza Cook5, (1)Swansea University, Cardiff, CF5, United Kingdom, (2)Swansea University, Swansea, United Kingdom, (3)UEA, University of East Anglia, Norwich, United Kingdom, (4)Aberystwyth University, Aberystwyth, United Kingdom, (5)University of Copenhagen, Physics of ice, climate and earth, Niels Bohr Institute, Copenhagen, Denmark
Rethinking tropical-extratropical interactions in the Atlantic basin (Invited) (187616)
Amy C Clement, University of Miami, RSMAS, Miami, FL, United States, Mark A Cane, Lamont-Doherty Earth Observatory, Palisades, NY, United States, Katinka Bellomo, Lamont -Doherty Earth Observatory, Palisades, NY, United States and Lisa Murphy Goes, University of Miami, Rosenstiel School of Marine, Atmospheric, and Earth Science, Department of Atmospheric Sciences, Miami, United States
Southern Hemisphere Climate Variability Forced by Northern Hemisphere Ice Sheet Topography (158158)
Tyler R Jones, University of Colorado, Institute of Arctic and Alpine Research, Boulder, CO, United States, William H.G. Roberts, University of Bristol, Bristol, United Kingdom, Eric J. Steig, University of Washington Seattle Campus, Seattle, WA, United States, James W C White, Univ Colorado, Institute of Arctic and Alpine Research, Boulder, CO, United States, Kurt M Cuffey, University of California Berkeley, Department of Geography, Berkeley, United States and Bradley R Markle, California Institute of Technology, Pasadena, CA, United States
Abrupt changes in atmospheric methane and carbon dioxide during Heinrich Stadials from very high resolution ice core data (Invited) (118496)
Edward J Brook1, James Edward Lee2, Thomas K Bauska3, Rachael Rhodes4, Shaun A Marcott5, Jinho Ahn6, Vasilii V Petrenko7, Jeffrey P Severinghaus8, Michael Kalk9, Hubertus Fischer10 and Jochen Schmitt10, (1)Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, United States, (2)Los Alamos National Laboratory, Earth and Environmental Science Division, Los Alamos, United States, (3)University of Cambridge, Earth Sciences, Cambridge, United Kingdom, (4)Oregon State University, Corvallis, OR, United States, (5)University of Wisconsin Madison, Department of Geoscience, Madison, United States, (6)Seoul National University, School of Earth and Environmental Sciences, Seoul, South Korea, (7)University of Rochester, Earth and Environmental Sciences, Rochester, NY, United States, (8)Scripps Institution of Oceanography, La Jolla, United States, (9)Oregon State University, College of Earth, Ocean and Atmospheric Sciences, Corvallis, OR, United States, (10)University of Bern, Climate and Environmental Physics and Oeschger Centre for Climate Research, Bern, Switzerland
Ocean-Ice Sheet Interactions in the Norwegian Sea and Teleconnections to Low Latitude Hydrology and Atmospheric Circulation (193195)
Jo Brendryen1,2, Bjarte Hannisdal1,2, Kristian Agasøster Haaga1,2, Haflidi Haflidason1,2, David Diego Castro1, Kristin Johanne Grasmo1, Hans Petter Sejrup3, R. Lawrence Edwards4, Hai Cheng5,6, Megan J Kelly4 and Yanbin Lu7, (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)University of Minnesota, Minneapolis, MN, United States, (5)Xi'an Jiaotong University, Institute of Global Environmental Change, Xian, China, (6)University of Minnesota, Department of Earth and Environmental Sciences, Minneapolis, United States, (7)University of Minnesota, Department of Earth Sciences, Minneapolis, MN, United States
Stability of AMOC and bipolar seesaw under different background climate in MIROC AOGCM (196593)
Ayako Abe-Ouchi1, Rumi Ohgaito2, Wing-Le Chan1, Masakazu Yoshimori3, Akira Oka4 and Kenji Kawamura5, (1)University of Tokyo, Atmosphere and Ocean Research Institute, Bunkyo-ku, Japan, (2)JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan, (3)The University of Tokyo, Atmosphere and Ocean Research Institute, Kashiwa, Japan, (4)The University of Tokyo, Japan, (5)National Institute of Polar Research, Tokyo, Japan
Laurentide ice sheet dynamics during the last glacial period (170611)
Marisa Montoya, Jorge Alvarez-Solas, Alexander Robinson and Rubén Banderas, Complutense University of Madrid, Madrid, Spain
Southern Ocean Control of Glacial AMOC Stability and Dansgaard-Oeschger Interstadial Duration (195900)
Christo Buizert and Andreas Schmittner, Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, United States

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