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Session Proposal: Advances in Understanding Global Meridional Overturning Circulation from Past to Future: Insights from Multiple Approaches (AGU25)

OS003
Advances in Understanding Global Meridional Overturning Circulation from Past to Future: Insights from Multiple Approaches

Session ID#: 246578

Session Description:
The Global Meridional Overturning Circulation is a major driver of Earth's climate, connecting the Atlantic, Pacific and Southern Oceans and influencing biogeochemical cycling on many timescales. Modern oceanographic observations and modeling studies are making great advances in understanding GMOC dynamics and predictability over seasonal to decadal periods. Meanwhile, paleoclimate observations and modeling studies have highlighted connections between the climate and variations in the structure and magnitude of GMOC over multi-decadal to tectonic timescales. Much remains to be understood about the interplay between GMOC changes and the cryosphere, atmosphere, and ocean biogeochemistry, as well as mechanisms driving past, present, future GMOC variations. Modern and Paleo approaches are complementary and bring new insights into GMOC dynamics and predictability under future climate conditions. This session welcomes theoretical, modeling, and observation-based studies that investigate the nature, stability and sensitivity of the GMOC to external forcing and internal feedbacks across seasonal-to-tectonic timescales.
Co-Sponsor(s):
  • A - Atmospheric Sciences
  • C - Cryosphere
  • GC - Global Environmental Change
  • PP - Paleoceanography and Paleoclimatology
Index Terms:

0724 Ice cores [CRYOSPHERE]
4805 Biogeochemical cycles, processes, and modeling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4901 Abrupt/rapid climate change [PALEOCEANOGRAPHY]
4962 Thermohaline [PALEOCEANOGRAPHY]
Primary Convener:  Feng He, University of Wisconsin Madison, Madison, WI, United States
Conveners:  Kelly H Kilbourne, University of Maryland (UMCES CBL), Solomons, United States, Maureen Walczak, University of Washington, School of Oceanography, Seattle, United States and Madeleine Youngs, University of Maryland College Park, Atmospheric and Oceanic Science, College Park, United States
 
Atlantic Meridional Overturning Circulation slowdown modulates wind-driven circulations in a warmer climate (1846292)
Mohima Sultana Mimi and Wei Liu, University of California Riverside, Riverside, CA, United States
 
Conceptual Models of Overturning Circulation in the Presence of Ice (Invited) (1847515)
Thomas W N Haine, Johns Hopkins University, Department of Earth and Planetary Sciences, Baltimore, MD, United States, Tarun Verma, Johns Hopkins University, Department of Earth & Planetary Sciences, Baltimore, United States and Patrick Blaser, University of Lausanne, Institute of Earth Sciences, Lausanne, Switzerland
 
Direct Observational Estimates of the Southern Ocean Meridional Overturning Circulation (Invited) (1856863)
Alison R Gray, University of Washington, School of Oceanography, Seattle, United States and Dhruv Balwada, Lamont-Doherty Earth Observatory, Palisades, United States
 
Wind forcing can blur the surface temperature fingerprint of the Atlantic meridional overturning circulation (1857473)
Kay McMonigal, University of Alaska Fairbanks, Fairbanks, AK, United States, Sarah Larson, North Carolina State University Raleigh, Raleigh, United States, Melissa Gervais, Pennsylvania State University, Department of Meteorology and Atmospheric Science, University Park, United States, Jeremy Michael Klavans, University of Miami, Miami, United States, Chengfei He, Woods Hole Oceanographic Institution, Woods Hole, MA, United States, Mark A Cane, Lamont-Doherty Earth Obs, Palisades, NY, United States, Susanna Corti, CNR Institute of Atmospheric Sciences and Climate, Bologna, Italy and Katinka Bellomo, RSMAS, Miami, United States
 
Sources and Paths of the Lower Branch of the Abyssal Overturning Circulation (1864237)
Xiaoting Yang, Woods Hole Oceanographic Institution, Woods Hole, MA, United States, Paola Cessi, University of California San Diego, Scripps Institution of Oceanography, La Jolla, CA, United States and Bruno Blanke, Laboratoire d'Océanographie Physique et Spatiale (LOPS), Brest, France
 
Phase Shift of AMOC and Multidecadal Global Mean Surface Temperature Under Anthropogenic Forcing (1871631)
Hanwen Bi, Ocean University of China, Qingdao, China, Xianyao Chen, Ocean University of China, Key Laboratory of Physical Oceanography, Qingdao, China, Xinyue Li, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany and Ka-Kit Tung, University of Washington, Department of Applied Mathematics, Seattle, United States
 
AMOC Weakening Shapes Ocean Heat Content Patterns under Strong Idealized Warming (1872022)
Chiara Ventrucci, University of Bologna, Department of Physics and Astronomy, Bologna, Italy; CNR Institute of Atmospheric Sciences and Climate, Bologna, Italy, Federico Fabiano, CNR-ISAC, Institute of Atmospheric Sciences and Climate, Bologna, Italy, Oliver Mehling, Utrecht University, Institute for Marine and Atmospheric research Utrecht, Utrecht, Netherlands, Katinka Bellomo, University of Padova, Department of Geosciences, Padova, Italy and Paolo Davini, CNR Institute of Atmospheric Sciences and Climate, Torino, Italy
 
Multi-centennial internal variability in the North Atlantic drives additional warming over Europe (1872959)
Amen Al-Yaari1, Didier Swingedouw1, Pascale Bracconot2, Laura Boyall3, Olivier Marti2, Paul Lincoln3, Thibaut Caley1, Thomas Extier1 and Celia Martin-Puertas3, (1)University Bordeaux, CNRS, Bordeaux INP, EPOC, UMR 5805, Pessac, France, (2)LSCE Laboratoire des Sciences du Climat et de l'Environnement, Gif-Sur-Yvette Cedex, France, (3)Department of Geography, Royal Holloway University of London (United Kingdom), London, United Kingdom
 
Estimating the global meridional overturning circulation based on a high-resolution hydrographic dataset (1873660)
Sang-Ki Lee, Atlantic Oceanographic and Meteorological Laboratory, Miami, FL, United States, Dongmin Kim, UM-CIMAS/NOAA-AOML, Miami, United States, Fabian Gomez, Northern Gulf Institute, Starkville, United States, Hosmay Lopez, NOAA/Atlantic Oceanographic and Meteorological Laboratory, Miami, United States, Denis Volkov, Cooperative Institute for Marine and Atmospheric Studies, University of Miami, Miami, United States and Shenfu Dong, AOML/NOAA, Miami, United States
 
Meridional Overturning Circulation in a Warmer World: Insights from the Early and Middle Miocene (1878342)
Trusha Naik1,2, Agatha M De Boer1, Helen Katherine Coxall1, Natalie Burls3, Catherine Bradshaw4, Yannick Donnadieu5, Alexander Farnsworth6, Amanda Frigola7, Matthew Huber8, Nicholas Herold9, Pasha Karami10, Gregor Knorr11, Allegra N. LeGrande12, Gerrit Lohmann13, Yousheng Li14, Dan John Lunt15, Matthias Prange16 and Yurui Zhang17, (1)Stockholm University, Department of Geological Sciences, Stockholm, Sweden, (2)Bolin Centre for Climate Research, Stockholm, Sweden, (3)George Mason University, Fairfax, United States, (4)Met Office Hadley Centre, Exeter, United Kingdom, (5)LSCE CEA/CNRS, Gif Sur Yvette, France, (6)University of Bristol, BRIDGE, School of Geographical Sciences, Bristol, United Kingdom, (7)Barcelona Supercomputing Center, Barcelona, Spain, (8)Purdue University, Department of Earth, Atmospheric, and Planetary Sciences, West Lafayette, IN, United States, (9)University of New South Wales, Sydney, Australia, (10)Swedish Meteorological and Hydrological Institute, Norrköping, Sweden, (11)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Bremerhaven, Germany, (12)NASA GISS 568, New York, United States, (13)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research, Bremerhaven, Germany, (14)University of Bristol, Bristol, United Kingdom, (15)University of Bristol, Bristol, BS8, United Kingdom, (16)MARUM - University of Bremen, Bremen, Germany, (17)State Key Laboratory of Marine Environmental Science, College of Ocean & Earth Sciences, Xiamen University, Xiamen, China
 
Inferring deglacial Atlantic circulation change from the large temporal lags between paleoceanographic records (1879537)
Brynnydd Hamilton, Woods Hole Oceanographic Institution, Physical Oceanography, Woods Hole, United States; Massachusetts Institute of Technology, Cambridge, United States and Geoffrey Gebbie, Woods Hole Oceanographic Institution, Woods Hole, United States
 
Weakened Atlantic Meridional Overturning Circulation Causes the Historical North Atlantic Warming Hole (1899849)
Kaiyuan Li and Wei Liu, University of California Riverside, Riverside, CA, United States
 
20th Century Weakening of North Atlantic Meridional Heat Transport (1923326)
Sizhe Chen, Matthew Osman and Francesco Muschitiello, University of Cambridge, Department of Geography, Cambridge, United Kingdom
 
Arctic Sea Ice Meltwater as a Forcing and Feedback on the Atlantic Meridional Overturning Circulation (1927732)
Camille Hankel, University of Washington, Atmospheric & Climate Science, Seattle, United States, Wei Cheng, University of Washington, CICOES, Seattle, United States and Cecilia M Bitz, University of Washington, Atmospheric and Climate Science, Seattle, United States
 
Atmospheric and oceanic energy transport during North Atlantic freshening events: Influences of moisture transport and hydrologic cycle feedbacks (1930526)
Seung Hun Baek, Lawrence Livermore National Laboratory, Livermore, CA, United States, Juan Manuel Lora, Yale University, Department of Earth and Planetary Sciences, New Haven, CT, United States, Christopher B Skinner, University of Massachusetts Lowell, Department of Environmental, Earth and Atmospheric Sciences, Lowell, United States, Minmin Jason Fu, Harvard University, Cambridge, United States and Jiang Zhu, NSF National Center for Atmospheric Research, Boulder, United States
 
Atmospheric Conditions Over the North Atlantic Ocean During the Recovery of the Atlantic Meridional Overturning Circulation in the TraCE-21K-II Simulation (1942055)
Shih-Yu Lee, Academia Sinica, Taipei, Taiwan, Yu-Shen Lin, Research Center for Environmental Changes Academia Sinica, Taipei, Taiwan, Feng He, University of Wisconsin-Madison, Center for Climatic Research, Madison, United States and Yue-Gau Chen, Research Center for Environmental Changes, Academia Sinica, Taipei, Taiwan
 
Millennial Variability, Regime Shifts, and Equilibrium States of Global Ocean Meridional Overturning Circulation in Long Climate Simulations (1946061)
Alexey V Fedorov, Yale University, New Haven, CT, United States; LOCEAN-IPSL, CNRS-IRD-MNHN-Sorbonne Université, Paris, France and Paul Curtis, Yale University, New Haven, United States
 
Is Indian Ocean overturning different? Testing the anomalously old deep Indian Ocean radiocarbon (14C) ages during the last glacial maximum (1951579)
Patrick A Rafter, University of South Florida Tampa, Tampa, FL, United States, Maureen Walczak, University of Washington, School of Oceanography, Seattle, United States, Francois Primeau, University of California Irvine, Earth System Science, Irvine, CA, United States and Jimin Yu, Australian National University, Research School of Earth Sciences, Canberra, ACT, Australia
 
Projected Dynamic Sea Level Changes Along the U.S. East Coast Due to 21st-Century Atlantic Meridional Overturning Circulation Weakening (1961965)
LEI Huang, University of Miami, Cooperative Institute for Marine and Atmospheric Studies, Miami, FL, United States, Denis Volkov, Cooperative Institute for Marine and Atmospheric Studies, University of Miami, Miami, United States, Shenfu Dong, AOML/NOAA, Miami, United States, Sang-Ki Lee, University of Miami, Cooperative Institute for Marine and Atmospheric Studies, Miami, United States and Dongmin Kim, UM-CIMAS/NOAA-AOML, Miami, United States
 
Warming-Induced Slowdown of Vertical Circulation Sets Pattern of Projected Pacific Deoxygenation (1968197)
Benjamin A Taylor, University of California San Diego, La Jolla, CA, United States, Yassir Eddebbar, Scripps Institution of Oceanography, La Jolla, CA, United States, Yohei Takano, NERC British Antarctic Survey, Cambridge, United Kingdom and Lynne D Talley, Scripps Institution of Oceanography, UCSD, La Jolla, United States
 
Downgradient Flow in the Global Overturning Circulation (1972318)
Lynne D Talley, University of California San Diego, Scripps Institution of Oceanography, La Jolla, CA, United States
 
Evolving Southern Ocean overturning in warming climates (1978427)
Tingting Zhu, University of California Riverside, Department of Earth and Planetary Sciences, Riverside, United States and Wei Liu, University of California, Riverside, Department of Earth and Planetary Sciences, Riverside, United States
 
Reconstructing Historical AMOC Variability with Machine Learning Framework Trained on a CMIP6 Earth System Model Ensemble. (1982198)
Andrei Medvedev1, Huaiyu Wei2, Kaushik Srinivasan2, Kyle Armour1,3, Andrew Stewart2 and Georgy E Manucharyan1, (1)University of Washington, School of Oceanography, Seattle, United States, (2)University of California Los Angeles, Atmospheric and Oceanic Sciences, Los Angeles, United States, (3)University of Washington, Department of Atmospheric and Climate Science, Seattle, United States
 
Benthic Foraminiferal δ18O and δ13C Traces Southeast Indian Ocean Water Mass geometry Across the Last Deglaciation (1986135)
Natalie Umling, Rutgers University New Brunswick, New Brunswick, NJ, United States and Elisabeth L Sikes, Rutgers University, New Brunswick, United States
 
Oceanic heat content variability and its drivers in the Nordic Seas (1988338)
Sergey Molodtsov1, Wilbert Weijer1, Derek DeSantis2, Alexandra K Jonko1 and Milena Veneziani1, (1)Los Alamos National Laboratory, Los Alamos, NM, United States, (2)Los Alamos National Laboratory, Los Alamos, United States
 
Atlantic ‘cold blob’ is caused by ocean heat transport change, not surface fluxes (1996095)
Stefan Rahmstorf1, Jan Jendrkowiak1, Ruijian Gou2, Lijing Cheng3 and Halldór Björnsson4, (1)Potsdam Institute for Climate Impact Research, Potsdam, Germany, (2)Key Laboratory of Physical Oceanography and Frontiers Science Center for Deep Ocean Multispheres and Earth System, Ocean University of China, Qingdao, China, (3)Institute of Atmospheric Physics, Chinese Academy of Sciences, International Center for Climate and Environment Sciences, Beijing, China, (4)Icelandic Meteorological Office, Reykjavik, Iceland
 
Unravelling the mystery: The key role of tides in strengthening AMOC during the Bølling-Allerød (2002144)
Yugeng Chen1, Pengyang Song1, Yuchen Sun2, Xianyao Chen3 and Gerrit Lohmann4, (1)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Bremerhaven, Germany, (2)Alfred Wegener Institute, Helmholtz-Center for Polar and Marine Research, Bremerhaven, Germany, (3)Ocean University of China, Qingdao, China, (4)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research, Bremerhaven, Germany
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