PC008
Long-term Changes of the Deep Ocean Overturning Circulation: Past and Future
Session ID#: 85028
Session Description:
As a key component of the climate system, the deep-ocean overturning circulation, with its interconnected branches in the Atlantic, Indian, Pacific, and Southern Oceans regulates the global transport of heat, freshwater and carbon. Paleo-reconstructions indicate that long-term variations in the meridional overturning circulation (MOC), from centennial, millennial, to even longer timescales, have played a pivotal role in past climate changes. Nevertheless, an understanding of the mechanisms that drive these long-term variations remains a major challenge in climate research. Our ability to predict future MOC variability and anthropogenic climate change, meanwhile, depends critically on our understanding of the mechanisms of MOC variability during past climatic changes. This interdisciplinary session aims to bring together theoretical, modeling and observational studies, as well as novel methodologies that combine above approaches, to study the spatial-temporal structures, mechanisms, and impacts of long-term changes of the MOC in the past and future.
Index Terms:
1620 Climate dynamics [GLOBAL CHANGE]
4901 Abrupt/rapid climate change [PALEOCEANOGRAPHY]
4928 Global climate models [PALEOCEANOGRAPHY]
4962 Thermohaline [PALEOCEANOGRAPHY]
Primary Chair: Wei Liu, University of California Riverside, Riverside, CA, United States
Co-chairs: Zhengyu Liu, Ohio State University Main Campus, Columbus, OH, United States, Malte Jansen, University of Chicago, Chicago, IL, United States and Sophia Hines, Lamont -Doherty Earth Observatory, Palisades, United States
Primary Liaison: Wei Liu, University of California Riverside, Riverside, CA, United States
The Evolving AMOC Multidecadal Variability in a Warming Climate. (642005)
Xiaofan Ma, Institute of Atmospheric Sciences, Chinese Academy of Sciences, Beijing, China; University of California, Riverside, Riverside, CA, United States, Wei Liu, University of California Riverside, Riverside, CA, United States, Changlin Chen, Fudan University, Shanghai, China, Jun Cheng, NUIST Nanjing University of Information Science and Technology, Nanjing, China, Gang Huang, IAP Insititute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China and Xichen Li, Institute of Atmospheric Physics, CAS, Beijing, China
Intensified Deep Ocean Variability Induced by Topographic Rossby Waves in the Western Pacific (643507)
Jianing Wang1, Qiang Ma1, Fan Wang2 and Yilong Lyu3, (1)Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China, (2)Institute of Oceanology, Center for Ocean Mega-Science, Chinese Academy of Sciences, Chinese Academy of Sciences Key Laboratory of Ocean Circulation and Waves, Qingdao, China, (3)Institute of Oceanology, Chinese Academy of Sciences, Key Laboratory of Ocean Circulation and Waves (KLOCAW), Qingdao, China
Multiple proxies needed to reconstruct the Atlantic Water Masses and AMOC during the Last Glacial Maximum (644840)
Sifan Gu1, Zhengyu Liu2, Delia Oppo3, Jean Lynch-Stieglitz4, Alexandra Jahn5, Jiaxu Zhang6 and Lixin Wu1, (1)Ocean University of China, Qingdao, China, (2)The Ohio State University, Columbus, OH, United States, (3)WHOI, Geology and Geophysics, Woods Hole, MA, United States, (4)Georgia Tech, Atlanta, GA, United States, (5)University of Colorado at Boulder, Atmospheric and Oceanic Sciences and INSTAAR, Boulder, CO, United States, (6)Los Alamos National Laboratory, Los Alamos, NM, United States
Indo-Pacific Control on Ocean Overturning Across Climates (649773)
Jess F Adkins, California Institute of Technology, Pasadena, CA, United States, Emily Rose Newsom, California Institute of Technology, Division of Geological and Planetary Sciences, Pasadena, CA, United States, Eric Galbraith, Autonomous University of Barcelona, Cerdanyola del Vallès (Bellaterra), Spain and Andrew F Thompson, California Institute of Technology, Physical Oceanography, Pasadena, CA, United States
Last Glacial-Interglacial Differences in North Atlantic MOC – New Insights From Radiocarbon Records of Surface and Deep-Water Ventilation at ‘Shackleton Site’ Off Portugal (650751)
Michael Sarnthein, University of Kiel, Institute of Geosciences, Kiel, Germany, Blanca Ausin Gonzalez, ETH Zurich, Zurich, Switzerland and Timothy I Eglinton, ETH Swiss Federal Institute of Technology Zurich, Geological Institute, Zurich, Switzerland
Glacial overturning circulation structure and Agulhas Leakage from Nd isotope and K/Ar measurements in the Cape Basin (652381)
Sophia Hines, Lamont -Doherty Earth Observatory, Palisades, NY, United States, Allison M Franzese, CUNY Hostos Community College, Natural Sciences, Bronx, NY, United States; Organization Not Listed, Washington, DC, United States, Chiza N Mwinde, Smith College, Northampton, MA, United States, Steven L Goldstein, Columbia University, Department of Earth and Environmental Sciences, New York, NY, United States, Christopher D Charles, Scripps Institution of Oceanography, La Jolla, CA, United States, Ian R Hall, Cardiff University, School of Earth and Ocean Sciences, Cardiff, CF24, United Kingdom and Sidney R Hemming, Lamont-Doherty Earth Observ, Palisades, NY, United States
Deep Water Dynamics in the Cape Basin during the Mid Pleistocene Transition (652524)
Mollie Passacantando, Rutgers University New Brunswick, Marine and Coastal Sciences, New Brunswick, NJ, United States, Sophia Hines, California Institute of Technology, Pasadena, CA, United States and Sidney R Hemming, Lamont-Doherty Earth Observ, Palisades, NY, United States
Role of Antarctic sea ice on deep ocean circulation and ventilation in glacial-interglacial climates (653337)
Sandy O Gregorio, University of Quebec at Rimouski UQAR, ISMER, Rimouski, QC, Canada, Louis-Philippe Nadeau, University of Quebec at Rimouski UQAR, Rimouski, QC, Canada, Raffaele M Ferrari, MIT, Cambridge, MA, United States and Jonathan Maitland Lauderdale, Massachusetts Institute of Technology, Department of Earth, Atmospheric and Planetary Sciences, Cambridge, MA, United States
Sedimentary Records of Deep Water Export From the Arctic to the North Atlantic Ocean (654517)
Lauren Elizabeth Kipp, Lamont -Doherty Earth Observatory, Palisades, NY, United States; Dalhousie University, Halifax, NS, Canada, Markus Kienast, Dalhousie University, Department of Oceanography, Halifax, NS, Canada and Jerry F McManus, Columbia U. / LDEO, Palisades, NY, United States
North Atlantic radiocarbon constraints on ocean circulation over the last deglaciation (656448)
Andrea Burke, University of St Andrews, School of Earth and Environmental Sciences, St Andrews, KY16, United Kingdom, James William Buchanan Rae, University of St Andrews, School of Earth and Environmental Sciences, St Andrews, United Kingdom, Rosanna Greenop, University of St Andrews, St Andrews, United Kingdom, Paula J Reimer, Queen's University Belfast, Belfast, BT9, United Kingdom and Tim Heaton, University of Sheffield, Sheffield, United Kingdom
