PS003
Dynamics of the ocean's overturning: past, present, and future

Session ID#: 257112

Session Description:
The ocean’s overturning circulation is a critical component of Earth’s climate system, impacting heat transport, carbon storage, nutrient distribution, and primary productivity across the globe. However, the strength and geometry of the overturning circulation has changed in the past, and may change in the future, with implications for both global and regional climate and carbon cycling. This session invites contributions that explore the dynamics of ocean overturning across different timescales—from paleoclimate reconstructions to modern observations and future projections. With this session, we aim to foster interdisciplinary discussions and theoretical understanding on the processes and feedbacks driving overturning strength, variability, and stability under different climate states.

Potential themes include but are not limited to:

  • Past variability: Insights from paleo-proxies and modeling on how overturning circulation responded to past climatic shifts (e.g., glacial-interglacial cycles, past warm worlds).
  • Present-day changes: Observational and modeling analyses of recent trends in overturning strength, regional water-mass transformations, and interactions with ice sheets and atmospheric forcing.
  • Future projections: Simulations of how overturning may evolve under anthropogenic warming, including potential tipping points, and feedback mechanisms.

We are particularly interested in studies that advance our contemporary theory of overturning dynamics, or that link observational or modelling results with existing theory.

Co-Sponsor(s):
  • Climate and Ocean Change -
  • High Latitude Environments -
Index Terms:

4207 Arctic and Antarctic oceanography [OCEANOGRAPHY: GENERAL]
4532 General circulation [OCEANOGRAPHY: PHYSICAL]
4540 Ice mechanics and air/sea/ice exchange processes [OCEANOGRAPHY: PHYSICAL]
4999 General or miscellaneous [PALEOCEANOGRAPHY]
Student/Early Career Chair:  Yubeen Jeong, University of North Carolina at Chapel Hill, Department of Earth, Marine and Environmental Sciences, Chapel Hill, United States
Primary Chair:  Andrea Burke, University of St Andrews, School of Earth and Environmental Sciences, St Andrews, United Kingdom
Co-chairs:  Graeme MacGilchrist, University of St. Andrews, School of Earth and Environmental Sciences, St Andrews, United Kingdom and Helen L Johnson, University of Oxford, Department of Earth Sciences, Oxford, United Kingdom
 
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Ashraful Moontahab, Bangabandhu Sheikh Mujibur Rahman Maritime University Bangladesh, Oceanography and Hydrography, Dhaka, Bangladesh, K M Azam Chowdhury, University of Dhaka, Department of Oceanography, Dhaka, Bangladesh, Tonia Astrid Capuano, University of Dhaka, International Centre for Ocean Governance, Dhaka, Bangladesh, Nur Uddin Md Khaled Chowdhury, Tarleton State University, Chemistry, Geosciences & Physics, Stephenville, United States, Tasin Sumaia Khan, Bangladesh Maritime University, Oceanography and Hydrography, Dhaka, Bangladesh and Siraj Uddin Md. Babar Chowdhury, Bangladesh Oceanographic Research Institute, Physical and Space Oceanography, Cox's Bazar, Bangladesh
 
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Yueng Djern Lenn, Bangor University, School of Ocean Sciences, Bangor, LL59, United Kingdom, Ben J Lincoln, Bangor University, School of Ocean Sciences, Bangor, United Kingdom, Kirstin Schulz, University of Texas at Austin, Austin, United States, Helen Pillar, University of Texas at Austin, Oden Institute for Computational Engineering and Sciences, Austin, United States and An Nguyen, University of Texas at Austin, Austin, TX, United States
 
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Fernanda DI Alzira Oliveira Matos1, Dmitry Sidorenko2, Christian Stepanek2, Jan Streffing2 and Gerrit Lohmann2, (1)Alfred Wegener Institute, (2)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research, Bremerhaven, Germany
 
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Alexey V Fedorov, Yale University, Earth and Planetary Sciences, New Haven, United States; Sorbonne University, LOCEAN-IPSL, Paris, France, Theo Schiminovich, Yale University, New Haven, CT, United States and Paul Curtis, Yale University, New Haven, United States
 
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Juan Muglia, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), CESIMAR, Puerto Madryn, Argentina, Andreas Schmittner, Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, United States, Stefan Mulitza, MARUM−Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany, Bremen, Germany, Patrick A Rafter, University of South Florida, College of Marine Science, St Petersburg, United States, Janne Repschlaeger, University of Kiel, Kiel, Germany, Christopher J Somes, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany and Sophie-Berenice Wilmes, Bangor University, Menai Bridge, United Kingdom
 
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Henry Peterson, PhD, California Institute of Technology, Pasadena, United States and Jörn Callies, California Institute of Technology, Pasadena, CA, United States
 
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Francois Fripat1, Daniel Mikhail Sigman2, Xuyuan Ai3, Cedric Dumoulin1, Simone Moretti4, Anja S Studer5, Bernhard Diekmann6, Oliver Esper7, Thomas Frederichs8, Frank Lamy9, Ling Liu10, Frank Pattyn11, Mareike Schmitt4, Ralf Tiedemann12, Gerald Haugh13 and Alfredo Martinez-Garcia13, (1)Université Libre de Bruxelles, Brussel, Belgium, (2)Princeton University, Geosciences, Princeton, United States, (3)Princeton University, Princeton, United States, (4)Max Planck Institute for Chemistry, Mainz, Germany, (5)University of Basel, Basel, Switzerland, (6)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Potsdam, Bremerhaven, Germany, (7)Alfred Wegner Institute (AWI) Helmholtz Centre for Polar and Marine Research, Marine Geology, Bremerhaven, Germany, (8)University of Bremen, Department of Geosciences, Bremen, Germany, (9)AWI Bremerhaven, Bremerhaven, Germany, (10)Alfred Wegner Institute (AWI) Helmholtz Centre for Polar and Marine Research, Marine Geology, BremerHaven, Germany, (11)Université Libre de Bruxelles, Laboratoire de Glaciologie, Brussel, Belgium, (12)Alfred-Wegener-Institute, Bremerhaven, Germany, (13)Max Planck Institute for Chemistry, Climate Geochemistry, Mainz, Germany
 
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Ina Nagler1, Andreas Born2, Helene Asbjørnsen1 and Ulysses Ninnemann3, (1)Bjerknes Centre for Climate Research, Bergen, Norway, (2)University Of Bergen, Department of Earth Science, Bergen, Norway, (3)University of Bergen, Department of Earth Science, Bergen, Norway
 
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Arthur Coquereau1,2, Florian Sevellec2, Thierry Huck2, Joel Hirschi3 and Quentin Jamet4, (1)University of Western Brittany, Brest, France, (2)Laboratoire d'Océanographie Physique et Spatiale, Univ Brest CNRS IRD Ifremer, Brest, France, (3)National Oceanography Centre, Southampton, United Kingdom, (4)Service Hydrographique Et Oceanographique De La Marine (SHOM), Brest, France
 
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Anthony Meza, MIT-WHOI Joint Program in Oceanography, Woods Hole and Cambridge, United States; Woods Hole Oceanographic Institution, Physical Oceanography Department, Woods Hole, United States, Henri F Drake, University of California Irvine, Earth System Science, Irvine, United States and Geoffrey Gebbie, Woods Hole Oceanographic Institution, Physical Oceanography, Woods Hole, United States
 
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Cassia Cai, University of Washington, School of Oceanography, Seattle, United States, Matt Luongo, University of Washington, Seattle, United States and LuAnne Thompson, University of Washington, Oceanography, Seattle, United States
 
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Amber Walsh1, Jennifer Mecking1, Who M Kim2, Stephen G Yeager2, Joel Hirschi1 and Alejandra Sanchez-Franks1, (1)National Oceanography Centre, Southampton, United Kingdom, (2)NSF National Center for Atmospheric Research, Boulder, United States
 
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Mike Muglia, Coastal Studies Institute, Baton Rouge, United States, Patterson Taylor, University of North Carolina Coastal Studies Insitute, Wanchese, United States, Harvey Seim, University of North Carolina at Chapel Hill, Earth, Marine, and Environmental Sciences, Chapel Hill, NC, United States, Caroline Lowcher, East Carolina University, Department of Coastal Studies, Wanchese, United States, John Bane, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States and Yubeen Jeong, University of North Carolina at Chapel Hill, Department of Earth, Marine and Environmental Sciences, Chapel Hill, United States
 
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Fernanda Marcello1, Ilana C Wainer2, Michel Mahiques1, Marcia Caruso Bícego3 and Laura Verona4, (1)University of São Paulo, Oceanographic Institute, São Paulo, Brazil, (2)University of Sao Paulo, Sao Paulo, Brazil, (3)Universidade de São Paulo, Sao Paulo, Brazil, (4)University of São Paulo, Oceanographic Institute, Sao Paulo, Brazil
 
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