PP037
The stability, structure and temporal variability of AMOC: past, present, and future

Session ID#: 75841

Session Description:
The Atlantic Meridional Overturning Circulation (AMOC) is recognized as a major regulator for the Earth’s climate. Paleoclimate reconstructions applying diverse proxies have highlighted the close link between past climate change and ocean circulation dynamics, particularly in the Atlantic Ocean. Recent advancements in model simulations and contemporary observations have greatly grown our understanding and appreciation of the spatially and highly complex structure and temporal variability of the AMOC, and its interplay with the cryosphere. Yet, our ability to predict future AMOC response to anthropogenic forcing remains limited. An improved understanding of the AMOC’s response to hydrographic and climatic changes is hence critical. This session welcomes both modeling studies and proxy-reconstructions that investigate the relevance of AMOC changes for past climate change throughout the Quaternary, including drivers, and associated climate feedbacks over decadal-to-orbital timescales. Contributions that connect past AMOC evolution to the projected changes under future warmer climate are also welcomed.
Index Terms:

4532 General circulation [OCEANOGRAPHY: PHYSICAL]
4901 Abrupt/rapid climate change [PALEOCEANOGRAPHY]
4928 Global climate models [PALEOCEANOGRAPHY]
4962 Thermohaline [PALEOCEANOGRAPHY]

Primary Convener:  Jerry Tjiputra, NORCE Norwegian Research Centre and Bjerknes Centre for Climate Research, Bergen, Norway
Conveners:  Feng He, University of Wisconsin Madison, Madison, WI, United States, Julia Gottschalk, Lamont -Doherty Earth Observatory, Palisades, United States and Jerry F McManus, Columbia U. / LDEO, Palisades, NY, United States
Primary Liaison:  Feng He, University of Wisconsin Madison, Madison, WI, United States
 
Assessing the Ability of Zonal d18O Contrast in Benthic Foraminifera to Reconstruct Deglacial Evolution of Atlantic Meridional Overturning Circulation (487924)
Sifan Gu1, Zhengyu Liu2, Jean Lynch-Stieglitz3, Alexandra Jahn4, Jiaxu Zhang5, Keith T Lindsay6 and Lixin Wu1, (1)Ocean University of China, Qingdao, China, (2)The Ohio State University, Columbus, OH, United States, (3)Georgia Tech, Atlanta, GA, United States, (4)National Center for Atmospheric Research, Boulder, CO, United States, (5)Los Alamos National Laboratory, Los Alamos, NM, United States, (6)NCAR, Boulder, CO, United States
 
The Millenium Timescale Dansgaard-Oeschger Oscillation: How Small Scale Turbulent Mixing Controls Both its Existence and its Period (495245)
W Richard Peltier1, Yuchen Ma1 and Deepak Chandan2, (1)University of Toronto, Toronto, ON, Canada, (2)University of Toronto, Physics, Toronto, ON, Canada
 
231Pa/230Th Fractionation From Sediment Resuspension in Benthic Nepheloid Layers (498000)
Siyuan-Sean Chen1,2, Olivier Marchal1, Kassandra Costa1, Paul Edmond Lerner3 and Michiel Rutgers van der Loeff4, (1)Woods Hole Oceanographic Institution, Department of Geology & Geophysics, Woods Hole, MA, United States, (2)University of Bristol, School of Earth Sciences, Bristol, United Kingdom, (3)NASA Goddard Institute for Space Studies, New York, NY, United States, (4)Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Marine Geochemistry, Bremerhaven, Germany
 
AMOC changes over the last 25,000 years – insights from compilation of 231Pa/230Th records (Invited) (501614)
Hong Chin Ng1, Laura Robinson1 and Jerry F McManus2, (1)University of Bristol, Bristol, United Kingdom, (2)Columbia U. / LDEO, Palisades, NY, United States
 
The Rapid Warming of North Atlantic Subpolar Basin during 1993-2012 (505669)
Hanshi Wang and Xiaopei Lin, Ocean University of China, Qingdao, China
 
Reconstruction of the North Atlantic end-member of the Atlantic Meridional Overturning Circulation over the last 2 Myr (506434)
Joohee Kim1,2, Maria Jaume-Seguí3, Maayan Yehudai1,2, Steven L Goldstein1,2, Leopoldo D Pena3 and Patrizia Ferretti4, (1)Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY, United States, (2)Columbia University of New York, New York, NY, United States, (3)Universitat de Barcelona, Barcelona, Spain, (4)CNR Institute for the Dynamics of Environmental Processes, Mestre-Venice, Italy
 
Coupled oscillations of the Laurentide Ice Sheet and AMOC during the last deglaciation (509844)
Andrew D Wickert1, Carlie Williams, Kerry Lee Callaghan3, Ruza F Ivanovic4, Paul J Valdes5, Lauren J Gregoire6, Lael Vetter7, Andrew J. Breckenridge8 and Carrie E Jennings3, (1)University of Minnesota, Department of Earth & Environmental Sciences and Saint Anthony Falls Laboratory, Minneapolis, MN, United States, (2)University of Minnesota, Department of Earth & Environmental Sciences, Minneapolis, MN, United States, (3)University of Leeds, School of Earth and Environment, Leeds, LS2, United Kingdom, (4)University of Bristol, Bristol, BS8, United Kingdom, (5)University of Leeds, School of Earth and Environment, Leeds, United Kingdom, (6)University of Arizona, Department of Geosciences, Tucson, AZ, United States, (7)University of Wisconsin - Superior, Superior, WI, United States
 
Impact of High Latitude Freshwater Flux on the AMOC during MIS 11: Insight for Future Climate? (511669)
Benoit Thibodeau1, John Doherty2, Yuet Fung Ling2, Christelle Not2, Henning A Bauch3 and Adina Paytan4, (1)University of Hong Kong, Hong Kong, Hong Kong, (2)University of Hong Kong, Department of Earth Sciences, Hong Kong, Hong Kong, (3)GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany, (4)UCSC-Inst Marine Sciences, Santa Cruz, CA, United States
 
AMOC Variability over the Last ~2 Ma from a North-South Atlantic Transect Using Nd Isotopes (529902)
Steven L Goldstein1, Leopoldo D Pena2, Maayan Yehudai3, Joohee Kim1, Maria Jaume-Seguí4, Karla P Knudson1, Chandranath Basak1, Alison E Hartman5 and Rachel Lupien6, (1)Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY, United States, (2)Universitat de Barcelona, Barcelona, Spain, (3)Lamont-Doherty Earth Observatory of Columbia University, Palisades, United States, (4)University of Barcelona, Department of Earth and Ocean Dynamics, Barcelona, Spain, (5)Lamont Doherty Earth Observatory of Columbia Univerisity, Palisades, NY, United States, (6)Brown University, Department of Earth, Environmental, and Planetary Sciences, Providence, RI, United States
 
Glacial North Atlantic Intermediate Water: Something Fishy in the Ice Age North Atlantic (Invited) (554958)
Jean Lynch-Stieglitz, Georgia Tech, Atlanta, GA, United States, Shannon Valley, Georgia Institute of Technology Main Campus, Earth and Atmospheric Sciences, Atlanta, GA, United States, Thomas M Marchitto Jr, Univ Colorado, Boulder, CO, United States, Sifan Gu, University of Wisconsin Madison, Madison, WI, United States and Zhengyu Liu, The Ohio State University, Columbus, OH, United States
 
Water Circulation within South Atlantic Subtropical Gyre Constrained by Seismic Reflection Images (565795)
Jingxuan Wei1, Robert Reece1 and Tanner Michael Acquisto2, (1)Texas A&M University, Geology and Geophysics, College Station, TX, United States, (2)Columbia University, Lamont-Doherty Earth Observatory, New York, NY, United States
 
The Role of Low Latitude Heating in Setting the Global Overturning Circulation (566984)
Jess F Adkins1, Emily Rose Newsom2, Eric D Galbraith3 and Andrew F Thompson1, (1)California Institute of Technology, Pasadena, CA, United States, (2)California Institute of Technology, Division of Geological and Planetary Sciences, Pasadena, CA, United States, (3)McGill University, Montreal, QC, Canada
 
The impact of vertical mixing on glacial ocean circulation and sea ice (576439)
Jonathan Winfield Rheinlaender, Bjerknes Centre for Climate Research, Department of Earth Science, University of Bergen, Bergen, Norway, David Ferreira, MIT--EAPS, Cambridge, MA, United States and Kerim Hestnes Nisancioglu, University of Bergen and the Bjerknes Centre for Climate Research, Bergen, Norway
 
Insolation threshold as a trigger of abrupt oscillations in AMOC at the end of interglacials (585973)
Qiuzhen Yin1, Zhipeng Wu1,2, David A Hodell3, Aurélien Quiquet4,5, Andre Berger1, Hugues Goosse1 and Gilles Ramstein4, (1)Université Catholique de Louvain, Georges Lemaître Centre for Earth and Climate Research, Earth and Life Institute, Louvain-La-Neuve, Belgium, (2)Institute of Geology and Geophysics, Chinese Academy of Sciences, Key Laboratory of Cenozoic Geology and Environment, Beijing, China, (3)University of Cambridge, Godwin Laboratory for Palaeoclimate Research, Cambridge, United Kingdom, (4)Laboratoire des Sciences du Climat et de l'Environnement, Gif-Sur-Yvette Cedex, Paris, France, (5)Institut Louis Bachelier, Chair Energy and Prosperity, Paris, France
 
Variability in North Atlantic Deep Water Ventilation During Late Pleistocene Interglacials (605926)
Ulysses Ninnemann, University of Bergen, Department of Earth Science and the Bjerknes Centre for Climate Research, Bergen, Norway, Eirik Vinje Galaasen, Nil Irvali, Uni Bjerknes Centre, Uni Research, Bergen, Norway, Yair Rosenthal, Rutgers University, Marine & Coastal Sciences, New Brunswick, NJ, United States, Helga Flesche Kleiven, University of Bergen, Bergen, Norway and David A Hodell, University of Cambridge, Godwin Laboratory for Palaeoclimate Research, Cambridge, United Kingdom
 
Unforced AMOC Oscillation in Glacial and Deglacial Climate (620643)
Ayako Abe-Ouchi, University of Tokyo, Atmosphere and Ocean Research Institute, Bunkyo-ku, Japan, Wing-Le Chan, University of Tokyo, Tokyo, Japan, Takashi Obase, University of Tokyo, Atmosphere and Ocean Research Institute, Kashiwa, Japan, Sam Sherriff-Tadano, Atmosphere and Ocean Research Institute University of Tokyo, Tokyo, Japan, Takahito Mitsui, University of Tokyo, Kashiwa, Japan, Kenji Kawamura, Natl. Inst. of Polar Research, Tokyo, Japan, Masakazu Yoshimori, The University of Tokyo, Chiba, Japan, Akira Oka, University of Tokyo, Bunkyo-ku, Japan, Christo Buizert, Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States, Stephen Obrochta, Akita University, Graduate School of International Resource Science, Akita, Japan and Rumi Ohgaito, JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan
 
Development and evaluation of Proxy Surrogate Reconstructions as a tool for characterizing Common Era AMOC variability. (622107)
Casey Saenger, Univ of Washington-JISAO, Seattle, WA, United States, Michael N Evans, Univ Maryland, College Park, MD, United States, Allegra N. LeGrande, NASA GISS 568, New York, NY, United States, Julia Claire Tindall, University of Leeds, Leeds, United Kingdom, Martin Werner, AWI, Bremerhaven, Germany and Kaustubh Thirumalai, University of Texas at Austin, Institute for Geophysics, Austin, TX, United States
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