PP21A:
Abrupt Climate Change: Causes, Mechanisms, and Consequences IV Posters

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Session ID#: 17656

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:  Shaun A Marcott, University of Wisconsin Madison, Department of Geoscience, Madison, United States, Feng He, University of Wisconsin-Madison, Center for Climatic Research, Madison, United States and Meredith A Kelly, Dartmouth College, Earth Sciences, Hanover, NH, United States
Chairs:  David J Thornalley, University College London, Dept. of Geography, London, United Kingdom; WHOI, Geology and Geophysics, Woods Hole, United States, Feng He, University of Wisconsin-Madison, Center for Climatic Research, Madison, United States, Shaun A Marcott, University of Wisconsin Madison, Department of Geoscience, Madison, United States and Meredith A Kelly, Dartmouth College, Department of Earth Sciences, Hanover, United States; Dartmouth College, Earth Sciences, Hanover, NH, 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:

The influence of extreme seasonality on lake temperatures during Younger Dryas (188856)
Dr. Frederik Schenk, PhD1,2, Christian Stranne2,3 and Barbara Wohlfarth1,2, (1)Stockholm University, Bolin Centre for Climate Research, Stockholm, Sweden, (2)Stockholm University, Department of Geological Sciences, Stockholm, Sweden, (3)Center for Coastal and Ocean Mapping Joint Hydrographic Center, Durham, NH, United States
Placing modern climate warming in western Mongolia into paleoclimatic context (118123)
Destiny Shanika Washington, University of Maine, Orono, ME, United States
Hydroclimate of North Island of New Zealand during the last 45,000 Years. (199594)
Natallia Piatrunia1, Timothy M Shanahan2, Paul M Augustinus3, Daniel Atkins3 and Yongsong Huang4, (1)University of Texas at Austin, Austin, TX, United States, (2)The University of Texas at Austin, Department of Earth and Planetary Sciences, Jackson School of Geosciences, Austin, United States, (3)University of Auckland, Auckland, New Zealand, (4)Brown University, Department of Earth, Environmental, and Planetary Sciences, Providence, RI, United States
Sensitivity of the Younger Dryas climate to changes in orbtial, greenhouse gas, and freshwater forcing in CESM1 (122173)
Taylor M Hughlett, University of Texas at Arlington, Arlington, TX, United States, Arne M E Winguth, The University of Texas at Arlington, Arlington, TX, United States, Nan A Rosenbloom, National Center for Atmospheric Research, Boulder, United States and Feng He, University of Wisconsin-Madison, Center for Climatic Research, Madison, United States
Spatial variability and trends in Younger Dryas equilibrium line altitudes across the European Alps using a hypsometrically based ELA model: results and implications (145567)
Durban G Keeler, University of Utah, Department of Geography, Salt Lake City, United States, Summer Rupper, University of Utah, School of Environment, Society, and Sustainability, Salt Lake City, UT, United States, Joerg M Schaefer, Columbia University of New York, Lamont-Doherty Earth Observatory, Palisades, NY, United States, Robert C Finkel, University of California Berkeley, Berkeley, CA, United States and Josh Maurer, Brigham Young University, Department of Geological Sciences, Provo, UT, United States
Late-glacial and Holocene fluctuations at Monte Fitz Roy (49°S), Southern Patagonia (177419)
Scott Reynhout, University of Chile, Santiago, Chile, Esteban A Sagredo, Pontifical Catholic University of Chile, Santiago, Chile, Michael R Kaplan, Lamont-Doherty Earth Observatory, Palisades, NY, United States, Juan C Aravena, Universidad de Magallanes, Gaia Antártica, Punta Arenas, Chile, Mateo Antonio Martini, Centro de Investigaciones en Ciencias de la Tierra, Cordoba, Argentina and Joerg M Schaefer, Columbia University of New York, Lamont-Doherty Earth Observatory, Palisades, NY, United States
A Bi-hemispheric perspective on the last glacial termination from the Southern Alps of New Zealand and the Altai Mountains of western Mongolia (118042)
Peter Strand, University of Maine, School of Earth and Climate Sciences, Orono, United States, Aaron E Putnam, University of Maine, Earth and Climate Sciences, Palisades, United States, Joerg M Schaefer, Columbia University of New York, Lamont-Doherty Earth Observatory, Palisades, NY, United States, George Denton, University of Maine, School of Earth and Climate Sciences and Climate Change Institute, Orono, ME, United States, David Putnam, University of Maine at Presque Isle, Presque Isle, ME, United States, David Barrell, GNS Science-Institute of Geological and Nuclear Sciences Ltd, Lower Hutt, New Zealand, Roseanne Schwartz, Lamont-Doherty Earth Observatory, Palisades, NY, United States and Oyungerel Sambuu, Mongolian University of Science and Technology, Ulaanbaatar, Mongolia
A Glacial Chronology of the Strait of Magellan (161668)
Carly Peltier1,2, Michael R Kaplan3, Joerg M Schaefer4,5, Rodrigo León Soteres6, Esteban A Sagredo6 and Juan C Aravena7, (1)Dartmouth College, Department of Earth Sciences, Hanover, United States, (2)Columbia University, Lamont-Doherty Earth Observatory, Earth and Environmental Sciences, Palisades, NY, United States, (3)Lamont-Doherty Earth Observatory, Palisades, NY, United States, (4)Columbia University of New York, Lamont-Doherty Earth Observatory, Palisades, NY, United States, (5)Lamont-Doherty Earth Observatory, Palisades, United States, (6)Pontifical Catholic University of Chile, Santiago, Chile, (7)Universidad de Magallanes, Gaia Antártica, Punta Arenas, Chile
Glacier fluctuations in the Rwenzori Mountains, Uganda, during the Last Glacial Maximum and Termination 1 (181695)
Margaret S Jackson1, Meredith A Kelly2, James Russel3, Alice M Doughty4, Jennifer A Howley5, David Benjamin Cavagnaro5 and Susan R H Zimmerman6, (1)Trinity College Dublin, Geography, Dublin, Ireland, (2)Dartmouth College, Earth Sciences, Hanover, NH, United States, (3)Earth, Environmental, and Planetary Sciences, Brown University, Providence, United States, (4)University of Maine, Orono, ME, United States, (5)Dartmouth College, Hanover, NH, United States, (6)Lawrence Livermore National Laboratory, Center for Accelerator Mass Spectrometry, Livermore, United States
Glacier ice-surface lowering in the Altai Mountains of western Mongolia during the last glacial termination (118034)
Nathaniel Richard Norris, University of Maine, Orono, ME, United States
Dust provenance in NEEM deep ice core from Greenland over the past 30,000 years using Pb and Sr isotopic composition (154948)
Changhee Han1,2, Yeongcheol Han2, Khanghyun Lee3, Sanghee Lee1, Sungmin Hong1 and Soon Do Hur2, (1)Inha University, Ocean sciences, Incheon, South Korea, (2)Korea Polar Research Institute, Incheon, South Korea, (3)Korea Polar Research Institute, Incheon, Korea, Republic of (South)
Radioactive and Stable Paleoatmospheric Methane Isotopes across the Last Deglaciation and Early Holocene from Taylor Glacier, Antarctica (183684)
Michael Dyonisius1, Vasilii V Petrenko2, Andrew Wyatt Smith3, Benjamin Hmiel4, Isaac J Vimont5, Quan Hua6, Bin Yang7, James A Menking8, Sarah Shackleton9, Rachael Rhodes8,10, Daniel Baggenstos11, Thomas K Bauska8,12, Michael Bock13, Jonas Beck13, Barbara Seth13, Christina M Harth9, Ross Beaudette9, Jochen Schmitt13, Edward J Brook14, Ray F Weiss9, Hubertus Fischer13 and Jeffrey P Severinghaus15, (1)University of Colorado Boulder, Institute of Arctic and Alpine Research, Boulder, United States, (2)University of Rochester, Earth and Environmental Sciences, Rochester, NY, United States, (3)RSMAS, Ocean Sciences, Miami, FL, United States, (4)University of Rochester, Department of Earth and Environmental Sciences, Rochester, United States, (5)Institute of Arctic and Alpine Research, University of Colorado, Boulder, United States, (6)Australian Nuclear Science and Technology Organisation (ANSTO), Kirrawee DC, NSW, Australia, (7)Centre for Accelerator Science, Australian Nuclear Science and Technology Organisation (ANSTO), Lucas Heights, Australia, (8)Oregon State University, Corvallis, OR, United States, (9)Scripps Institution of Oceanography, La Jolla, CA, United States, (10)University of Cambridge, Department of Earth Science, Cambridge, United Kingdom, (11)Climate and Environmental Physics and Oeschger Center for Climate Research, University of Bern, Bern, Switzerland, (12)University of Cambridge, Godwin Laboratory for Palaeoclimate Research, Cambridge, United Kingdom, (13)University of Bern, Physics Institute, Bern, Switzerland, (14)Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, United States, (15)Scripps Institution of Oceanography, La Jolla, United States
New insights on the anatomy of abrupt climate changes based on high-resolution ice core records from NorthGRIP (Greenland) (120601)
Emilie Capron1, Sune Rasmussen1, Trevor J Popp1, Bruce H Vaughn2, Vasileios Gkinis3, Tobias Erhardt4, Hubertus Fischer5, Thomas Blunier1, Amaelle Landais6, Joel B Pedro1, Joergen Peder Steffensen1, Anders Svensson1 and Bo Vinther1, (1)Center for Ice and Climate, University of Copenhagen, Copenhagen, Denmark, (2)University of Colorado, Institute of Arctic and Alpine Research, Boulder, United States, (3)University of Copenhagen, Copenhagen, Denmark, (4)University of Bern, Bern, Switzerland, (5)University of Bern, Climate and Environmental Physics and Oeschger Centre for Climate Research, Bern, Switzerland, (6)LSCE Laboratoire des Sciences du Climat et de l'Environnement, IPSL - CEA - CNRS - UVSQ - University Paris-Saclay, Gif-Sur-Yvette Cedex, France
Deglacial Meltwater Pulse Recorded in Last Interglacial Mollusk Shells from Bermuda (163366)
Ian Z Winkelstern1, Mark P Rowe2, Kyger C Lohmann1, William Defliese3, Sierra V Petersen1 and Aaron William Brewer4, (1)University of Michigan Ann Arbor, Earth and Environmental Sciences, Ann Arbor, MI, United States, (2)Birkbeck, University of London, London, United Kingdom, (3)University of California Los Angeles, Department of Earth, Planetary, and Space Sciences, Los Angeles, CA, United States, (4)University of Washington Seattle Campus, Earth and Space Sciences, Seattle, WA, United States
Collapses of the Arctic sector of the Laurentide ice sheet in the western Arctic Ocean during the last glacial period (129743)
Kenta Suzuki1, Masanobu Yamamoto1, Tomohisa Irino2, Seung-il Nam3 and Toshiro Yamanaka4, (1)Hokkaido University, Sapporo, Japan, (2)Hokkaido University, Faculty of Environmental Earth Science, Sapporo, Japan, (3)Korea Polar Research Institute, Incheon, South Korea, (4)Okayama University, Okayama, Japan
An ultra-high resolution last deglacial marine sediment records of the Northwest Atlantic Ocean (137295)
Harunur Rashid1, David Piper2, Brittany Marche3, Marli Vermooten3, Kelly Lazar4 and Brent Brockway3, (1)Memorial University of Newfoundland Grenfell, Corner Brook, NF, Canada, (2)Bedford Institute of Oceanography, Geological Survey of Canada, Dartmouth, NS, Canada, (3)Memorial University of Newfoundland Grenfell, Corner Brook, Canada, (4)Clemson University, Environmental Engineering and Earth Sciences, Clemson, United States
A 16 kyr seawater neodymium isotope record from the central Bay of Bengal (172146)
Sushant Naik, National Institute of Oceanography, Geological Oceanography Division, Panjim, India, Chandranath Basak, Lamont-Doherty Earth Observatory of Columbia University, Palisades, United States, Divakar Pothuri, National Institute of Oceanography, Panjim, India and Steven L Goldstein, Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY, United States
Dueling Deglacial Depth Transects: A Synthesis of Isotope Records from the South Atlantic and Pacific Oceans Provides Insight into Deglacial Ocean Circulation (176897)
Elisabeth L Sikes, Rutgers University New Brunswick, Department of Marine and Coastal Sciences, New Brunswick, NJ, United States, Katherine A Allen, University of Maine, Orono, ME, United States and David C Lund, University of CT at Avery Point, Groton, United States
Upper Ocean Circulation in the Glacial Northeast Atlantic during Heinrich Stadials Ice-Sheet Retreat (141197)
Samuel Toucanne1, Guillaume Soulet2, Mathieu Bosq3, Sabine Marjolaine1, Sébastien Zaragosi4, Jean-François Bourillet1 and Germain Bayon1, (1)IFREMER, Plouzané, France, (2)Woods Hole Oceanographic Institution, Woods Hole, MA, United States, (3)EPOC Environnements et Paléoenvironnements Océaniques et Continentaux, Talence Cedex, France, (4)UMR 5805 – EPOC, Université de Bordeaux, Pessac, France
A tephra based marine-ice core synchronization of the GS-9/GIS-8 transition (38-40.5 ka b2k) (176009)
Sarah Berben1,2, Trond Dokken3,4, Eliza Cook5, Eystein Jansen1,2 and Peter Michael Abbott6, (1)University of Bergen, Department of Earth Science, Bergen, Norway, (2)Bjerknes Centre for Climate Research, Bergen, Norway, (3)Uni Research Climate, Bergen, Norway, (4)NORCE Norwegian Research Centre AS, Bjerknes Centre for Climate Research, Bergen, Norway, (5)University of Copenhagen, Physics of ice, climate and earth, Niels Bohr Institute, Copenhagen, Denmark, (6)Swansea University, Cardiff, United Kingdom
Reduction in Atlantic Meridional Overturning Circulation Over Heinrich Events 2 and 3 (117663)
Maya Gilchrist1, Delia Oppo2, Kuo Fang Hang3 and Kathryn Pietro2, (1)Northeastern University, Boston, MA, United States, (2)Woods Hole Oceanographic Institution, Woods Hole, MA, United States, (3)Institute of Earth Sciences Academia Sinica, Taipei, Taiwan
Tropical North Atlantic Subsurface Temperatures reflect AMOC Variability during Marine Isotope Stages 4-5 (149144)
Ryan Glaubke and Matthew W Schmidt, Old Dominion University, Ocean, Earth and Atmospheric Sciences, Norfolk, VA, United States
Western Tropical Atlantic Hydrologic change during the last 130,000 years (148165)
Sarah Madeline McGrath, College of Wooster, Wooster, OH, United States, Nicholas Lavoie, North Carolina State University Raleigh, Raleigh, NC, United States and Delia Oppo, Woods Hole Oceanographic Institution, Woods Hole, MA, United States
Using A Time-Dependent Dynamical Box Model to Understand Intermediate Water Records of Radiocarbon and Temperature (185099)
Sophia Hines, Woods Hole Oceanographic Institution, Marine Chemistry & Geochemistry, Woods Hole, United States, Jess F Adkins, California Institute of Technology, Pasadena, CA, United States and Andrew F Thompson, CALTECH California Institute of Technology, Pasadena, United States
High vs Low Latitude Sources and Sinks of CO2 During the Last Deglaciation (138862)
Jun Shao and Prof. Lowell D Stott, PhD, University of Southern California, Los Angeles, CA, United States
Evidence for Increased Carbon Storage in the Mid-Depth South Atlantic During the Last Deglaciation (138538)
Matthew Lacerra, University of CT at Avery Point, Groton, CT, United States, David C Lund, University of CT at Avery Point, Groton, United States and Jimin Yu, Australian National University, Research School of Earth Sciences, Canberra, Australia
Abrupt Deglacial Changes in Subarctic Pacific Ventilation: Intermediate and Deep Water Ventilation, Oxygen Fluctuations, and the relation to carbon cycle dynamics (181756)
Lester Lembke-Jene1, Ralf Tiedemann2, Xun Gong3, Lars Max1, Jianjun Zou1,4, Xuefa Shi4 and Gerrit Lohmann5, (1)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Bremerhaven, Germany, (2)Alfred-Wegener-Institute, Bremerhaven, Germany, (3)Cardiff University, Cardiff, United Kingdom, (4)First Institute of Oceanography, State Oceanic Administration, Qingdao, China, (5)University of Bremen, Bremen, Germany
North Pacific Modulation of the Global Carbon Cycle Through MIS-2: Insights from IODP Expedition 341 (191209)
Maureen H Walczak1,2, Alan Mix3, Stewart Fallon4, L Keith Fifield5 and Tim Hobern5, (1)University of Washington, Seattle, United States, (2)Oregon State University, College of Earth, Ocean, and Atmospheric Science, Corvallis, United States, (3)Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States, (4)The Australian National University, Research School of Earth Sciences, Canberra, Australia, (5)The Australian National University, Canberra, Australia
Evidence of Enhanced Respired Carbon in Eastern Equatorial Pacific Deep-Waters over the last 30,000 years (127080)
Natalie Elizabeth Umling, Rutgers University New Brunswick, Department of Marine and Coastal Sciences, New Brunswick, United States and Robert Thunell, University of South Carolina Columbia, School of Earth, Ocean and Environment, Columbia, SC, United States

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