PC005:
Meridional Overturning Circulation dynamics in past warm and cold climates


Session ID#: 29792

Session Description:
The meridional overturning circulation (MOC) is a key component of the global climate system, as it modulates the transport and storage of both heat and carbon. Changes in deep-ocean circulation are thought to have played a key role in past climatic transitions, such as between glacial and interglacial periods. However, reaching a quantitative understanding of the dynamics that contributed to these changes, remains a major challenge in climate research. The MOC’s response to current climate trends is also an unknown when assessing future global ocean-climate-carbon cycle interactions. Investigating how the MOC varied in the past can provide crucial information on the mechanisms and drivers of its variability, as well as on the possible impacts of future circulation changes. This multidisciplinary session will facilitate discussions between the modeling and data communities, with the aim to explore both the transient and equilibrium response of the MOC to different forcing scenarios. We welcome contributions from both proxy-based studies to reconstruct past changes, and those exploring these dynamics from a mechanistic perspective, spanning from theoretical approaches to fully-coupled numerical modeling efforts. We especially encourage combined model-data analyses, as well as studies investigating past periods that could be viewed as analogues for future climates.
Primary Chair:  Alice Marzocchi, University of Chicago, Geophysical Sciences, Chicago, IL, United States
Co-chairs:  Benoit Thibodeau, The University of Hong Kong, Earth Sciences and SWIMS, Hong Kong, Hong Kong, Juan Muglia, Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States and Andrea Burke, University of St Andrews, School of Earth and Environmental Sciences, St Andrews, United Kingdom
Index Terms:

1616 Climate variability [GLOBAL CHANGE]
4255 Numerical modeling [OCEANOGRAPHY: GENERAL]
4532 General circulation [OCEANOGRAPHY: PHYSICAL]
4962 Thermohaline [PALEOCEANOGRAPHY]
Cross-Topics:
  • BN - Biogeochemistry and Nutrients
  • HE - High Latitude Environments
  • OM - Ocean Modeling
  • PL - Physical Oceanography: Mesoscale and Larger

Abstracts Submitted to this Session:

Ruza F Ivanovic, University of Leeds, Leeds, LS2, United Kingdom, Paul J Valdes, University of Bristol, Bristol, United Kingdom, Lauren J Gregoire, University of Leeds, School of Earth and Environment, Leeds, United Kingdom and Andrew D Wickert, University of Minnesota Twin Cities, Minneapolis, MN, United States
Yiming Luo1, Jerry Tjiputra2, Chuncheng Guo3, Zhongshi Zhang2 and Jörg Lippold4, (1)University of Bergen, Geophysical Institute, Bergen, Norway, (2)Bjerknes Centre for Climate Research, Bergen, Norway, (3)Geophysical Institute, University of Bergen, Bergen, Norway, (4)Heidelberg University, Heidelberg, Germany
Casimir de Lavergne, UNSW, School of Mathematics and Statistics, Sydney, Australia, Madec Gurvan, Sorbonne Universités (UPMC, Univ Paris 06)-CNRS-IRD-MNHN, LOCEAN Laboratory, IPSL, Paris, France, Fabien Roquet, Bolin Centre for Climate Research, Stockholm, Sweden, Ryan Holmes, University of New South Wales, Climate Change Research Centre, ARC Centre of Excellence for Climate System Science and School of Mathematics and Statistics, Sydney, Australia; University of New South Wales, Stanford, Australia and Trevor J McDougall, University of New South Wales, Sydney, NSW, Australia
W Richard Peltier and Guido Vettoretti, University of Toronto, Toronto, ON, Canada
Juan Muglia1, Luke Skinner2 and Andreas Schmittner1, (1)Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States, (2)Department of Earth Sciences, Univ. of Cambridge, Cambridge, United Kingdom
Shantong Sun, Scripps Institution of Oceanography, La Jolla, CA, United States, Ian Eisenman, University of California San Diego, Scripps Institution of Oceanography, La Jolla, CA, United States and Andrew Stewart, University of California Los Angeles, Atmospheric and Oceanic Sciences, Los Angeles, CA, United States
Daniel E Amrhein, University of Washington, Oceanography / Atmospheric Sciences, Seattle, WA, United States, Carl Wunsch, Harvard University, Cambridge, MA, United States and Luanne Thompson, University of Washington Seattle Campus, Oceanography, Seattle, WA, United States
Michael Sarnthein, University of Kiel, Kiel, Germany, Kevin Küssner, Alfred-Wegener-Institute for Polar and Marine Research, Bremerhaven, Germany, Pieter M Grootes, Christian Albrechts Univ, Kiel, Germany and Ralf Tiedemann, AWI Bremerhaven, Bremerhaven, Germany
Alice Marzocchi and Malte Jansen, University of Chicago, Geophysical Sciences, Chicago, IL, United States
Benoit Thibodeau, The University of Hong Kong, Earth Sciences and SWIMS, Hong Kong, Hong Kong, Henning A Bauch, Academy of Sciences, Humanities, and Literature, Mainz, Germany, Adina Paytan, UCSC-Inst Marine Sciences, Santa Cruz, CA, United States, Thomas F Pedersen, University of Victoria, Victoria, BC, Canada and Andreas Schmittner, Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States
Marlene Klockmann, Uwe Mikolajewicz and Jochem Marotzke, Max Planck Institute for Meteorology, Hamburg, Germany
Aixue Hu1, Bette L Otto-Bliesner2, Justin Small1, Carrie Morrill3, Cecilia M Bitz4 and Nan A Rosenbloom5, (1)National Center for Atmospheric Research, Boulder, CO, United States, (2)National Center for Atmospheric Research, Climate and Global Dynamics Laboratory, Boulder, CO, United States, (3)NOAA's National Centers for Environmental Information, Boulder, CO, United States, (4)University of Washington, Seattle, WA, United States, (5)NCAR/CGD, Boulder, CO, United States
Emily Ann Kaiser1, Andrew Caldwell2 and Katharina Billups2, (1)Eckerd College, St. Petersburg, FL, United States, (2)University of Delaware, Lewes, DE, United States
Jiaxu Zhang, Los Alamos National Laboratory, Los Alamos, NM, United States; University of Wisconsin Madison, Madison, WI, United States, Zhengyu Liu, Ohio State University Main Campus, Columbus, OH, United States; Univ Wisconsin Madison, Madison, WI, United States, Esther C Brady, National Center for Atmospheric Research, Boulder, Boulder, CO, United States, Delia Oppo, WHOI, Geology and Geophysics, Woods Hole, United States, Peter U Clark, Oregon State University, Corvallis, OR, United States, Alexandra Jahn, University of Colorado at Boulder, Atmospheric and Oceanic Sciences and INSTAAR, Boulder, CO, United States, Shaun A Marcott, University of Wisconsin-Madison, Department of Geoscience, Madison, WI, United States and Keith T Lindsay, NCAR, Boulder, CO, United States
Heather L Ford, University of Cambridge, Earth Sciences, Cambridge, United Kingdom, Natalie Burls, George Mason University Fairfax, Fairfax, VA, United States and David A Hodell, University of Cambridge, Godwin Laboratory for Palaeoclimate Research, Cambridge, United Kingdom
Malte Jansen, University of Chicago, Chicago, IL, United States
Wei Liu, University of California Riverside, Earth Sciences, Riverside, CA, United States
Carlye Peterson, University of California Riverside, Earth Sciences, Riverside, CA, United States, Lorraine E Lisiecki, University of California Santa Barbara, Earth Science, Santa Barbara, CA, United States and Geoffrey Gebbie, Woods Hole Oceanographic Inst., Woods Hole, MA, United States
Andrew F Thompson1, Harrison Alexander Parker1 and Emily Rose Newsom2, (1)California Institute of Technology, Pasadena, CA, United States, (2)California Institute of Technology, Division of Geological and Planetary Sciences, Pasadena, CA, United States
Natalie Burls, George Mason University Fairfax, Fairfax, VA, United States, Alexey V Fedorov, Yale Univ, New Haven, CT, United States, Daniel Mikhail Sigman, Princeton University, Princeton, NJ, United States, Sam Jaccard, University of Bern, Bern, Switzerland, Heather L Ford, University of Cambridge, Earth Sciences, Cambridge, United Kingdom, Ralf Tiedemann, AWI Bremerhaven, Bremerhaven, Germany and Gerald Hermann Haug, ETH Swiss Federal Institute of Technology Zurich, Zurich, Switzerland; Max Planck Institute for Chemistry, Mainz, Germany
David Karel Hutchinson1, Agatha M De Boer1, Helen Coxall2, Rodrigo Caballero1 and Johan Nilsson3, (1)Stockholm University, Stockholm, Sweden, (2)Stockholm University, Department of Geological Sciences, Stockholm, Sweden, (3)Stockholm University, Department of meteorology, Stockholm, Sweden
James William Buchanan Rae1, David Thornalley2, Louisa I Bradtmiller3, Andrea Burke4, Holger Gebhardt5, William Robert Gray1, Rhian Laura Rees-Owen4 and Michael Sarnthein6, (1)University of St Andrews, School of Earth and Environmental Sciences, St Andrews, KY16, United Kingdom, (2)University College London, London, United Kingdom, (3)Macalester College, Saint Paul, MN, United States, (4)University of St Andrews, School of Earth and Environmental Sciences, St Andrews, United Kingdom, (5)Geologische Bundesanstalt, Vienna, Austria, (6)Univ Kiel, Kiel, Germany
Eric D Galbraith, ICREA Catalan Institution for Research and Advanced Studies, Barcelona, Spain, Casimir de Lavergne, UNSW, School of Mathematics and Statistics, Sydney, Australia and Sarah Eggleston, Empa, Laboratory for Air Pollution & Environmental Technology, Duebendorf, Switzerland
Jonathan Baker, Andrew J. Watson and Geoffery Vallis, University of Exeter, Exeter, United Kingdom
Shannon Valley1, Jean Lynch-Stieglitz1 and Thomas M Marchitto Jr2, (1)Georgia Institute of Technology Main Campus, Earth and Atmospheric Sciences, Atlanta, GA, United States, (2)Univ Colorado, Boulder, CO, United States
Nadee Uthpala Nanayakkara, Geological Survey and Mines Bureau Sri Lanka, Pitakotte, Sri Lanka and Pradeep N Ranasinghage, Department of Oceanography and Marine Geology, University of Ruhuna,, Matara, Sri Lanka
Louis-Philippe Nadeau, University of Quebec at Rimouski UQAR, Rimouski, QC, Canada, Raffaele M Ferrari, MIT, Cambridge, MA, United States and Malte Jansen, The University of Chicago, Geophysical Sciences, Chicago, IL, United States
Ny Riavo Gilbertinie Voarintsoa1,2, Ilkka Seppo Olavi Matero3, Lauren J Gregoire3, L. Bruce Railsback1, Julia Claire Tindall3, Louise C Sime4, Hai Cheng5, R. L. Edwards6, George A. Brook7, Gayatri Kathayat5, Xianglei Li5, Amos Fety Michel Rakotondrazafy8 and Marie Olga Madison Razanatseheno8, (1)University of Georgia, Department of Geology, Athens, GA, United States, (2)The Hebrew University of Jerusalem, Institute of Earth Sciences, Jerusalem, Israel, (3)University of Leeds, School of Earth and Environment, Leeds, United Kingdom, (4)Ice Dynamics and Paleoclimate, British Antarctic Survey, Cambridge, United Kingdom, (5)Xi’an Jiaotong University, Institute of Global Environmental Change, Xi'an, China, (6)University of Minnesota, Department of Earth Sciences, Minneapolis, MN, United States, (7)University of Georgia, Department of Geography, Athens, GA, United States, (8)Université d'Antananarivo, Sciences de la Terre et de l'Environnement, Antananarivo, Madagascar
Andy Ridgwell, University of California, Riverside, Department of Earth Sciences, Riverside, CA, United States and Sandra Kirtland Turner, University of California Riverside, Riverside, CA, United States
Sophie-Berenice Wilmes1, Andreas Schmittner1 and Mattias Green2, (1)Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States, (2)Bangor University, School of Ocean Sciences, Menai Bridge, United Kingdom
Geoffrey Gebbie, Woods Hole Oceanographic Inst., Woods Hole, MA, United States, Alexander Simms, University of California Santa Barbara, Santa Barbara, CA, United States and Lorraine E Lisiecki, University of California Santa Barbara, Earth Science, Santa Barbara, CA, United States
Casey Saenger, Univ of Washington-JISAO, Seattle, WA, United States, Michael N Evans, University of Maryland College Park, College Park, MD, United States, Allegra N. LeGrande, Columbia University, NASA/GISS, New York, NY, United States, Stephanie Pennington, University of Maryland College Park, United States, Julia Claire Tindall, University of Leeds, School of Earth and Environment, Leeds, United Kingdom, Martin Werner, AWI, Bremerhaven, Germany and Kaustubh Thirumalai, Brown University, Department of Earth, Environmental, and Planetary Sciences, Providence, RI, United States