CC001
Abrupt changes in the North Atlantic ocean circulation: past, present and future

Session ID#: 259699

Session Description:
In the present-day climate, the subpolar North Atlantic is a crucial region for deep-water formation, sustaining the Atlantic Meridional Overturning Circulation (AMOC). In the future, profound changes are projected in this region due to global warming. Notably, the AMOC and the subpolar gyre circulation are expected to change due to shifts in heat and freshwater fluxes, stratification, and deep convection, with a potential to undergo an abrupt transition or tipping to a different regime.

This session centres on characterising the dynamics of North Atlantic ocean and climate change, from deep circulation to surface systems, across timescales. We invite contributions in contemporary and palaeo oceanography that investigate past, present and/or future ocean circulation change, with a particular focus on subpolar gyre and AMOC tipping, abrupt transitions in deep convection, and threshold behaviours in physical water mass characteristics. In this context, interactions between the North Atlantic and other earth system components, such as ice sheets and the atmosphere, are also of interest. Studies can be based on modelling, observations (direct and indirect), or both, and where/when appropriate, we are keen to see exploration of a robust link between observations/modelled processes and North Atlantic change (e.g., designing early warning systems of abrupt transitions).

Co-Sponsor(s):
  • Physical Oceanography: Mesoscale and Larger -
Index Terms:

4515 Deep recirculations [OCEANOGRAPHY: PHYSICAL]
4532 General circulation [OCEANOGRAPHY: PHYSICAL]
9325 Atlantic Ocean [GEOGRAPHIC LOCATION]
Student/Early Career Chair:  Ilana Schiller-Weiss, Danish Meteorological Institute, Copenhagen, Denmark
Primary Chair:  Ruza F Ivanovic, University of Leeds, School of Earth and Environment, Leeds, United Kingdom
Co-chairs:  Andrea Burke, University of St Andrews, School of Earth and Environmental Sciences, St Andrews, United Kingdom, Alejandra Sanchez-Franks, National Oceanography Centre, Southampton, United Kingdom and Oliver Mehling, Utrecht University, Institute for Marine and Atmospheric research, Utrecht, Netherlands
 
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Madleen Grohganz1, Thomas M Bury2, Bregje van der Bolt3, Gert-Jan Reichart4 and Rick Hennekam1, (1)Royal Netherlands Institute for Sea Research, Department of Ocean Systems, Den Burg, Netherlands, (2)McGill University, Department of Physiology, Montreal, QC, Canada, (3)Wageningen University and Research Center, Earth Systems and Global Change Group, Wageningen, Netherlands, (4)NIOZ, Royal Netherlands Institute for Sea Research, Department of Ocean Systems, and Utrecht University, Fac Geosci, Dept Earth Sci, Texel, Netherlands
 
Freshening in the Subpolar Gyre: Salinity-Driven Changes in North Atlantic Climate Dynamics (1864006)
Holly Ayres, National Oceanography Centre, MPOC, Southampton, United Kingdom and Marilena Oltmanns, National Oceanography Centre, Marine Physics and Ocean Climate, Southampton, United Kingdom; University of Bremen, Bremen, Germany
 
Enhanced Decadal Variance in Nordic Seas with AMOC weakening in CESM (1909181)
Casey Patrizio, Henk Dijkstra, Anna S von der Heydt and Robbin Bastiaansen, Utrecht University, Institute for Marine and Atmospheric research, Utrecht, Netherlands
 
Abrupt Shifts in Subpolar Gyre Deep Convection under Stable Climate Conditions (1914487)
Marco Buccellato, University of Bologna, Bologna, Italy; CNR Institute of Atmospheric Sciences and Climate, Bologna, Italy, Alessio Bellucci, CNR-Italy, Bologna, Italy, Susanna Corti, CNR, Institute of Atmospheric Sciences and Climate, Bologna, Italy, Giuseppe Zappa, National Research Council of Italy, Institute of Atmospheric Sciences and Climate, Bologna, Italy and Paolo Ruggieri, University of Bologna, Department of Physics and Astronomy, Bologna, Italy
 
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David J Thornalley1, Stephen Barker2, Ian R Hall3 and Jack Wharton1, (1)University College London, Dept. of Geography, London, United Kingdom, (2)Cardiff University, School of Earth and Environmental Sciences, Cardiff, United Kingdom, (3)Cardiff University, School of Earth and Environmental Sciences, Cardiff, CF24, United Kingdom
 
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Oliver Mehling and Henk Dijkstra, Utrecht University, Institute for Marine and Atmospheric research, Utrecht, Netherlands
 
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Brooke Snoll1, Yvan Romé1, Ruza F Ivanovic1, Lauren J Gregoire1 and Sam Sherriff-Tadano2, (1)University of Leeds, School of Earth and Environment, Leeds, United Kingdom, (2)University of the Ryukyus, Department of Physics and Earth Sciences, Okinawa, Japan
 
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Swinda Falkena and Anna S von der Heydt, Utrecht University, Institute for Marine and Atmospheric research, Utrecht, Netherlands
 
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Scott Lewin, Imperial College London, London, United Kingdom, Marilena Oltmanns, WHOI, Woods Hole, MA, United States, Chris Wilson, National Oceanography Centre, Liverpool, United Kingdom, Pavel Berloff, Imperial College London, Department of Mathematics, London, United Kingdom and Theodore G Shepherd, University of Reading, Reading, United Kingdom
 
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Frederic S Castruccio, National Center for Atmospheric Research, Boulder, United States, Gokhan Danabasoglu, National Center for Atmospheric Research, Climate and Global Dynamics, Boulder, United States, Ping Chang, Texas A&M University, Department of Oceanography, College Station, United States and Dan Fu, Texas A&M University, Department of Atmospheric Sciences, College Station, United States
 
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Yujin Kim and Hajoon Song, Yonsei University, Department of Atmospheric Sciences, Seoul, South Korea
 
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Anna Hardisty, University College London, London, United Kingdom and Erica Thompson, University College London, Department of Science, Technology, Engineering and Public Policy, London, United Kingdom
 
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Eirini Papachristopoulou1, Delia Oppo2, Zakaria Hussain3, Stephen Barker4, David Fairman1, Polychronis C Tzedakis5 and David J Thornalley1, (1)University College London, Dept. of Geography, London, United Kingdom, (2)WHOI, Geology and Geophysics, Woods Hole, United States, (3)University College London, Geography, London, United Kingdom, (4)Cardiff University, Cardiff, United Kingdom, (5)University College London, Environmental Change Research Centre, Department of Geography, London, United Kingdom
 
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Waelbroeck Claire1, Uwe Mikolajewicz2, Joel Pedro3, Marie-Luise Kapsch2, Frédérique Eynaud4 and Clemens Schannwell2, (1)LOCEAN/IPSL, Sorbonne Université-CNRS-IRD-MNHN, UMR7159, 75005 Paris, France., Paris, France, (2)Max Planck Institute for Meteorology, Hamburg, Germany, (3)Australian Antarctic Division, Kingston, Australia, (4)EPOC Environnements et Paléoenvironnements Océaniques et Continentaux, Talence Cedex, France
 
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Jack Wharton1, Joel Bracamontes Ramírez2, Alice Carter-Champion1, David Fairman1, Philippa Goh3, Ian R Hall4, Elisha Hayward5, Zarina Hewett1, Lloyd D Keigwin6, Delia Oppo6, Eirini Papachristopoulou1, Irene Pérez Rodríguez7, Handong Yang8, Juliette Shorey3, Anouk Yim3, Yiming Zhang3, Barney Mullan3 and David J Thornalley1, (1)University College London, Dept. of Geography, London, United Kingdom, (2)Institute of Oceanography, University of Hamburg, Hamburg, Germany, (3)University College London, Geography, London, United Kingdom, (4)Cardiff University, School of Earth and Environmental Sciences, Cardiff, CF24, United Kingdom, (5)University College London, London, United Kingdom, (6)WHOI, Geology and Geophysics, Woods Hole, United States, (7)Spanish Institute of Oceanography, Santa Cruz de Tenerife, Spain, (8)University College London, Environmental Change Research Centre, Department of Geography, London, United Kingdom
 
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James William Buchanan Rae, University of St Andrews, School of Earth and Environmental Sciences, St Andrews, KY16, United Kingdom, Andrea Burke, University of St Andrews, School of Earth and Environmental Sciences, St Andrews, United Kingdom, Rosanna Greenop, University of St Andrews, St Andrews, United Kingdom, Rhian Rees-Owen, UK Department for Energy Security and Net Zero, Manchester, United Kingdom, Paula Reimer, Queens University Belfast, Belfast, United Kingdom and Tim Heaton, University of Leeds, Leeds, United Kingdom
 
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Tim D Cutler1, Philip Holden1, Neil R Edwards1 and Pallavi Anand2, (1)The Open University, School of Environment Earth and Ecosystem Sciences, Milton Keynes, United Kingdom, (2)The Open University, School of Environment, Earth and Ecosystem Sciences, Milton Keynes, United Kingdom
 
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Daniel Parkes1, David J Thornalley2, Erin McClymont3, Sophie Nuber4, David Fairman2, Mia Cousins5, Adrian Palmer6, Ian Matthews7, Jack Wharton2 and Ian Candy8, (1)University College London, Geography, London, United Kingdom, (2)University College London, Dept. of Geography, London, United Kingdom, (3)Durham University, Durham, United Kingdom, (4)University of Washington Seattle Campus, Seattle, United States, (5)University College London, London, United Kingdom, (6)Royal Holloway University of London, Geography, Egham, United Kingdom, (7)Royal Holloway, University of London, Geography, London, United Kingdom, (8)Royal Holloway,, Egham, United Kingdom
 
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Sybren Sjoerd Drijfhout, University of Southampton, Southampton, United Kingdom, Joran Angevaare, Royal Netherlands Meteorological Institute, De Bilt, Netherlands, Jennifer Mecking, National Oceanography Centre, Southampton, United Kingdom, René M. van Westen, Utrecht University, Institute for Marine and Atmospheric research Utrecht, Utrecht, Netherlands and Stefan Rahmstorf, Potsdam Institute for Climate Impact Research, Potsdam, Germany
 
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Thomas L. Frolicher1, Friedrich Burger2, Patrick Maier3, Yona Silvy3 and Didier Swingedouw4, (1)University of Bern, Oeschger Center for Climate Change Research, Bern, Switzerland, (2)University of Bern, Climate and Environmental Physics, Bern, Switzerland, (3)Climate and Environmental Physics, University of Bern, Bern, Switzerland, (4)University Bordeaux, CNRS, Bordeaux INP, EPOC, UMR 5805, Pessac, France
 
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