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Session Proposal: Advances in Understanding the Causes, Mechanisms, and Impacts of Quaternary Abrupt Climate Changes and Their Implications for the Future (AGU25)

PP003
Advances in Understanding the Causes, Mechanisms, and Impacts of Quaternary Abrupt Climate Changes and Their Implications for the Future

Session ID#: 251129

Session Description:
Abrupt climate changes have occurred at rates comparable to the ongoing anthropogenic warming throughout the Quaternary. Studies of these events provide critical insights into how the Earth System responds to abrupt shifts in the mean climate, but also reveal the spatiotemporal complexity of Earth System dynamics, the roles of different climate forcings (e.g., meltwater, ice sheets, volcanic emissions, solar radiation, isostatic adjustments, etc.), and the feedback mechanisms associated with these events. This session explores the causes, mechanisms, and impacts of past abrupt climate changes during the Quaternary (e.g., Dansgaard–Oeschger events, Heinrich events, the Younger Dryas, the 8.2 ka event, etc.), and how studies of these events may help us better understand future climate change. We welcome contributions that utilize geological and numerical approaches, including novel proxy data, climate model simulations, data assimilation, and new theoretical frameworks.
Co-Sponsor(s):
  • C - Cryosphere
  • OS - Ocean Sciences
Index Terms:

4901 Abrupt/rapid climate change [PALEOCEANOGRAPHY]
4938 Interhemispheric phasing [PALEOCEANOGRAPHY]
4960 Stadial [PALEOCEANOGRAPHY]
4962 Thermohaline [PALEOCEANOGRAPHY]
Primary Convener:  Chijun Sun, University of California Davis, Department of Earth and Planetary Sciences, Davis, United States
Conveners:  Sophia Macarewich, NSF National Center for Atmospheric Research, Boulder, United States and Allison E Lawman, Colorado College, Environmental Studies and Science Program, Colorado Springs, United States
 
Climate multistability and its robustness against the Milankovitch cycles for the last 1 Myr (1848183)
Laure Moinat1, Christian Vérard2, Daniel Goldberg3, Jérôme Kasparian1, Taras Gerya4 and Maura Brunetti1, (1)Group of Applied Physics and Institute for Environmental Sciences, University of Geneva, Geneva, Switzerland, (2)Department of Earth Sciences, University of Geneva, Geneva, Switzerland, (3)School of GeoSciences, University of Edinburgh, Edinburgh, United Kingdom, (4)ETH Zurich, Department of Earth and Planetary Sciences, Zurich, Switzerland
 
Modulation of Milankovitch scale climatic variation by global soil carbon sequestration (1852795)
Greg Retallack, University of Oregon, Department of Earth Sciences, Eugene, OR, United States
 
Millennial-scale Hydroclimate Variability in Northern Africa during the Last Glacial Period: Evidence from Tunisian Stalagmite δ¹⁸O (1854865)
Yun-Chuan Chung1,2, Hatem Dhaouadi3, Chuan-Chou Shen2, Heikki Seppä1, Anu Pauliina Kaakinen1, Christoph Spӧtl4, Emna Sbei5, Hédi Ben Ouezdou5, Attila Demeny6, István Hegyi6 and Sándor Kele6, (1)University of Helsinki, Helsinki, Finland, (2)National Taiwan University, Taipei, Taiwan, (3)University of Monastir, Monastir, Tunisia, (4)University of Innsbruck, Innsbruck, Austria, (5)University of Tunis, Tunis, Tunisia, (6)Research Centre for Astronomy and Earth Sciences, Budapest, Hungary
 
The “900 Kyr Event” as an Ecological Tipping Point: Multi-proxy Evidence from the Southwestern Australian Margin (1877486)
Anna Arrigoni1, Werner E. Piller1, Dr. Benjamin Petrick2,3, Briony Mamo4, Beth Anne Christensen5 and Gerald Auer1, (1)University of Graz, Department of Earth Sciences - NAWI Graz Geocenter, Graz, Austria, (2)University College London, London, United Kingdom, (3)University of Kiel, Institute of Geosciences, Kiel, Germany, (4)Macquarie University, Sydney, Australia, (5)Rowan University, Glassboro, NJ, United States
 
Prologue to a Drier Future in the Tropics: Lessons from Heinrich Stadial 1 (Invited) (1882471)
Pedro DiNezio1, Timothy M Shanahan2, Tianyi Sun3, Chijun Sun4, Xian Wu3,5, Allison E Lawman6, David Lea7, Masa Kageyama8, Ute Merkel9, Matthias Prange9, Bette L Otto-Bliesner10 and Xu Zhang11, (1)University of Colorado at Boulder, Department of Atmospheric and Oceanic Sciences, Boulder, 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 Texas at Austin, Institute for Geophysics, Austin, United States, (4)University of California Davis, Department of Earth and Planetary Sciences, Davis, United States, (5)University of Texas at Dallas, Richardson, TX, United States, (6)Colorado College, Environmental Studies and Science Program, Colorado Springs, United States, (7)University of California Santa Barbara, Department of Earth Science, Santa Barbara, United States, (8)Laboratoire des Sciences Du Climat et de L’Environnement, LSCE/IPSL, CEA-CNRS-UVSQ Université Paris-Saclay, Gif-Sur-Yvette, France, (9)MARUM - University of Bremen, Bremen, Germany, (10)NSF National Center for Atmospheric Research, Boulder, United States, (11)ITP Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China
 
Southern Ocean response to a rapid retreat of the West Antarctic Ice Sheet (1895042)
Joseph Schnaubelt, University of Connecticut, Department of Earth Sciences, Groton, CT, United States and Clay Richard Tabor, University of Connecticut, Earth Sciences, Storrs, United States
 
Upper water column structure in the Indian sector of the Southern Ocean since the Last Glacial Maximum (1896762)
Mirko Alessandro Uy1, Melissa A Berke1, Elisabeth L Sikes2, Natalie Umling2, Ryan Glaubke3, Joseph Cresswell4, Cassandre Stirpe5, Zanna Chase6, Sindia M Sosdian7 and Ross Williams8, (1)University of Notre Dame, Department of Civil and Environmental Engineering and Earth Sciences, Notre Dame, IN, United States, (2)Rutgers University, New Brunswick, United States, (3)Old Dominion University, Ocean, Earth and Atmospheric Sciences, Norfolk, United States, (4)University of Tasmania, Institute of Marine and Antarctic Studies, Hobart, Australia, (5)University of Florida, Ft Walton Beach, FL, United States, (6)University of Tasmania, Institute for Marine and Antarctic Studies, Hobart, TAS, Australia, (7)Cardiff University, Cardiff, United Kingdom, (8)University of Notre Dame, Department of Civil and Environmental Engineering and Earth Sciences, Notre Dame, United States
 
Tracking Global Carbon Cycle Variations Using Deep Pacific Benthic δ13C Stack: Evidence for Exogenous Carbon Input During the MIS 5a - MIS 4 Transition (1903916)
Bora Buyurgan, Georgia Institute of Technology, School of Earth and Atmospheric Sciences, Atlanta, United States, Jean Lynch-Stieglitz, Georgia Institute of Technology, School of Earth and Atmospheric Sciences, Atlanta, GA, United States and Sandra Kirtland Turner, University of California Riverside, Department of Earth and Planetary Sciences, Riverside, United States
 
Baltic Ice Lake Outbursts and Their Modeled Influence on Abrupt Global Climate Change (1906519)
Nathan Stansell1, Eric S Klein2, Joseph M Licciardi3, Lucy Atkinson4, Shelby Turner1, Leah Boccignone5 and Nick Cipra4, (1)Northern Illinois University, DeKalb, IL, United States, (2)University of Alaska Anchorage, Geological Sciences, Anchorage, United States, (3)University of New Hampshire, Earth Sciences, Durham, United States, (4)Northern Illinois University, DeKalb, United States, (5)University of Alaska Anchorage, Anchorage, United States
 
A 10Be Chronology of Moraine Construction in Lysefjorden, Southwest Norway, During the Late-Glacial Cold Reversal (1921112)
Katie Westbrook1, Aaron E Putnam1 and Tricia Hall Collins2, (1)University of Maine, School of Earth and Climate Sciences, Orono, United States, (2)University of Maine, School of Earth and Climate Sciences, Orono, ME, United States
 
What are the climate factors that determined when the Laurentide Ice Sheet grew or retreated? (1922257)
Kirstin Koepnick, Harvard University, Applied Mathematics, Cambridge, MA, United States, Jiang Zhu, NSF National Center for Atmospheric Research, Boulder, United States, Minmin Jason Fu, Yale University, Earth and Planetary Sciences, New Haven, CT, United States and Eli Tziperman, Harvard University, Cambridge, MA, USA., Cambridge, United States
 
Stromatolites Provide a Window into Interannual Climate Oscillations During the Early Eocene Climatic Optimum: From the Mineralogical Perspective (1931281)
Jianru Cheng1,2, Huifang Xu2, Tina Hill3, M'bark Baddouh3 and Junfeng Ji1, (1)Nanjing University, School of Earth Sciences and Engineering, Nanjing, China, (2)University of Wisconsin-Madison, Department of Geoscience, Madison, United States, (3)Bruker AXS, Inc., Madison, United States
 
Global ocean oxygen variations on millennial timescales: toward a more quantitative picture? (Invited) (1934259)
Yi Wang1, Fang Qian1, Kassandra Costa2 and Sune Nielsen3, (1)Tulane University, New Orleans, United States, (2)Woods Hole Oceanographic Institution, Department of Geology and Geophysics, Woods Hole, United States, (3)Centre de Recherches Pétrographiques et Géochimiques, CNRS, Université de Lorraine, Vandoeuvre lès Nancy, France
 
The Ocean Heat Valve: An Updated Framework for Global Oceanic Coupling of Glacial Abrupt Climate Change (1940005)
Christo Buizert, Oregon State University, Corvallis, OR, United States, Ayako Abe-Ouchi, University of Tokyo, Atmosphere and Ocean Research Institute, Bunkyo-ku, Japan, Guido Vettoretti, University of Copenhagen, København K, Denmark, Xu Zhang, ITP Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China, Yuta Kuniyoshi, AORI, The University of Tokyo, Kashiwa, JAPAN, Sarah Shackleton, Woods Hole Oceanographic Institution, Woods Hole, United States, Sune Rasmussen, Center for Ice and Climate, University of Copenhagen, Copenhagen, Denmark, Eric D Galbraith, McGill University, Earth and Planetary Sciences, Montreal, QC, Canada, Thomas F Stocker, University of Bern, Climate and Environmental Physics and Oeschger Center for Climate Change Research, Bern, Switzerland and Joel Pedro, Australian Antarctic Division, Kingston, Australia
 
A 10Be Surface-Exposure Glacier Chronology from Lysefjorden, Southwestern Norway: Evidence for Scandinavian Ice Sheet Behavior During the Last Deglaciation and the Late-Glacial Climate Reversal (1972995)
Tricia Hall Collins1, Aaron E Putnam2 and Katie Westbrook2, (1)University of Maine, School of Earth and Climate Sciences, Orono, ME, United States, (2)University of Maine, School of Earth and Climate Sciences, Orono, United States
 
Resumption of the California Current during the Bølling-Allerød following a collapsed glacial state (1977405)
Summer Kate Praetorius, USGS, Geology, Minerals, Energy, and Geophysics Science Center, Moffett Field, United States, Jessica Tierney, University of Arizona, Department of Geosciences, Tucson, United States, Jason A Addison, USGS, Geology, Minerals, Energy, & Geophysics Science Center, Menlo Park, CA, United States and Alan Condron, Woods Hole Oceanographic Institution, Woods Hole, United States
 
Local variability and regional coherence in biomarkers during rapid warming events across Siberia since the Last Glacial Maximum (1977908)
Gerard Otiniano1, Elizabeth K Thomas2, Jo Brendryen3, Isla Castañeda4, Haflidi Haflidason5, Darrell S Kaufman6, Samuel Mark7, Leah Marshall8, Nicholas McKay8, Martin Melles9, Justus Rodriguez10, Jeff M Salacup11 and John Inge Svendsen12, (1)University at Buffalo, Department of Earth Sciences, Buffalo, NY, United States, (2)University at Buffalo, Department of Earth Sciences, Buffalo, United States, (3)University of Bergen, Bergen, Norway, (4)University of Massachusetts Amherst, Earth, Geographic, and Climate Sciences, Amherst, United States, (5)University of Bergen, Department of Earth Science and Bjerknes Centre of Climate Research (BCCR), Bergen, Norway, (6)Northern Arizona University, School of Earth and Sustainability, Flagstaff, AZ, United States, (7)University of Alaska Fairbanks, Fairbanks, United States, (8)Northern Arizona University, School of Earth and Sustainability, Flagstaff, United States, (9)University of Cologne, Institute of Geology and Mineralogy, Cologne, Germany, (10)University at Buffalo, Geology, Buffalo, United States, (11)University of Massachusetts Amherst, Department of Earth, Geographic, and Climate Sciences, Amherst, United States, (12)University of Bergen, Department of Earth Sciences, Bergen, Norway
 
Deciphering Two-Phase Global Hydroclimate Patterns During Heinrich Stadial 1: Insights from Model Simulations and Proxy Records (1984866)
Zoe Zenker1, Chijun Sun1, Bette L Otto-Bliesner2, Jiang Zhu2, Sophia Macarewich2 and Allison E Lawman3, (1)University of California Davis, Department of Earth and Planetary Sciences, Davis, United States, (2)NSF National Center for Atmospheric Research, Boulder, United States, (3)Colorado College, Environmental Studies and Science Program, Colorado Springs, United States
 
A Well-Preserved MIS 4 Paleoforest Offshore of Alabama Contains Evidence of Abrupt Climate Change (1986103)
Dr. Kristine L DeLong, Ph.D.1,2, Grant L. Harley3, Kehui Xu4, Andy Reese5, Jeffrey Obelcz6, Kelli Moran7, Ellen Bergan8, Kendall Fontenot9, Ben Owens10, Mark E Vardy10 and Zhixiong Shen11, (1)Louisiana State University, Department of Geography and Anthropology, Baton Rouge, LA, United States, (2)Coastal Studies Institute, Baton Rouge, United States, (3)University of Idaho, Department of Earth and Spatial Sciences, Moscow, United States, (4)Louisiana State University, Department of Oceanography and Coastal Sciences, Baton Rouge, LA, United States, (5)University of Southern Mississippi, Geography and Geology, Hattiesburg, MS, United States, (6)US Naval Research Laboratory, Ocean Sciences Division, Washington, DC, United States, (7)U.S. Geological Survey - Woods Hole Coastal and Marine Science Center, Woods Hole, United States, (8)University of Tennessee, Knoxville, United States, (9)University of Washington Seattle, Seattle, WA, UNITED STATES, (10)SAND Geophysics, Southampton, United Kingdom, (11)Coastal Carolina University, Department of Marine Science, Conway, United States
 
Ocean and climate impacts of southern expansion of the Cordilleran Ice Sheet (2000992)
Maureen H Walczak1, Alan C Mix2, Jay R Alder3, Summer Kate Praetorius4, Joseph S Stoner5, Brendan Reilly6, Jim E O'Connor7, Katherine Stelling2, Samantha Kathryn Cargill5 and Jonas T Donnenfield8, (1)University of Washington, School of Oceanography, Washington, United States, (2)Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, United States, (3)USGS, Corvallis, United States, (4)Oregon State University, Corvallis, United States, (5)Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States, (6)Lamont-Doherty Earth Observatory, Columbia University, Palisades, United States, (7)USGS, Portland, United States, (8)University of Washington, School of Oceanography, Seattle, United States