PP010
Deep Ocean Circulation Changes and Their Impacts
Session ID#: 83829
Session Description:
Fluctuations in the Atlantic Meridional Overturning Circulation (AMOC) have been implicated in past climate, ecosystem, and carbon cycle changes. The Southern Ocean and North Pacific may also have played important roles in past climate and carbon cycle variability. Yet quantitative reconstructions of deep ocean circulation remain challenging for both modern and past climates. With recent community efforts focussing on estimating the modern and late Holocene AMOCs (UK RAPID / US AMOC) and reconstructing ocean circulation and carbon cycling (OC3) during the last deglaciation, here we invite modern oceanographers, paleoceanographers and modelers to assess the current understanding of deep ocean circulation changes and their impacts.
Index Terms:
1622 Earth system modeling [GLOBAL CHANGE]
1630 Impacts of global change [GLOBAL CHANGE]
1635 Oceans [GLOBAL CHANGE]
4901 Abrupt/rapid climate change [PALEOCEANOGRAPHY]
Primary Convener: Andreas Schmittner, Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States
Conveners: Ayako Abe-Ouchi, University of Tokyo, Atmosphere and Ocean Research Institute, Bunkyo-ku, Japan, Lorraine E Lisiecki, University of California Santa Barbara, Earth Science, Santa Barbara, CA, United States and Aixue Hu, NCAR, Boulder, CO, United States
Primary Liaison: Andreas Schmittner, Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States
North Atlantic benthic δ13C and δ18O data from OC3 compilation reveal importance of H1 meltwater for deglacial deepwater stratification changes (497369)
Janne Repschlaeger1, Ning Zhao1, Olivier antonin Cartapanis2, Stefan Mulitza3, Lorraine E Lisiecki4, Juan Muglia5, Ralf Schiebel1 and OC3 members, (1)Max Planck Institute for Chemistry, Climate Geochemistry Department, Mainz, Germany, (2)Bern University, Bern, Switzerland, (3)Univ Bremen, Bremen, Germany, (4)University of California Santa Barbara, Earth Science, Santa Barbara, CA, United States, (5)Consejo Nacional de Investigaciones Científicas y Técnicas, CESIMAR, Puerto Madryn, Argentina
Ocean Circulation Controls on CO2 Release from the Atlantic and Pacific Sectors of the Southern Ocean Since the Last Glacial Maximum (507625)
Elisabeth L Sikes, Rutgers University New Brunswick, New Brunswick, NJ, United States, Vincent J Clementi, Rutgers University, New Brunswick, NJ, United States and Katherine A Allen, University of Maine, Orono, ME, United States
Reconstructing Mediterranean Seawater Circulation During the Anoxic Holocene Sapropel S1 Episode Using Nd Isotopes in Fish Debris and Foraminifera (517648)
Gert J De Lange1,2, Jiawang Wu2,3, Katharina Pahnke4, Philipp Boening5, Li Wu6 and Annie Michard7, (1)Utrecht University, Department of Earth Science-Geochemistry, Geosciences, Utrecht, Netherlands, (2)Tongji university, State Key Laboratory of Marine Geology, Shanghai, China, (3)Faculty Geosciences, Utrecht University, Dept. Earth Sciences, Utrecht, Netherlands, (4)Max Planck Institute for Marine Microbiology, Bremen, Germany, (5)ICBM, Oldenburg, Germany, (6)Tongji university, Marine Geology, Shanghai, China, (7)CEREGE, Isotope Geochemistry, Aix-en-Provence, France
Rapid loss of CO2 from the South Pacific Ocean during the last glacial termination (538007)
Katherine A Allen, University of Maine, Orono, ME, United States, Elisabeth L Sikes, Rutgers University, Piscataway, NJ, United States, Robert F Anderson, Lamont-Doherty Earth Obs, Palisades, NY, United States and Yair Rosenthal, Rutgers University, Marine & Coastal Sciences, New Brunswick, NJ, United States
Pacific Meridional Overturning Circulation during the Mid-Pliocene Warm Period (3.264-3.025 Ma) (541765)
Heather L Ford, Queen Mary, University of London, Geography, London, United Kingdom, Natalie Burls, George Mason University, Atmospheric, Oceanic and Earth Sciences, Fairfax, VA, United States and David A Hodell, University of Cambridge, Godwin Laboratory for Palaeoclimate Research, Cambridge, United Kingdom
Evolution of the Global Overturning Circulation since the Last Glacial Maximum based on Neodymium isotopes (Invited) (550843)
Jianghui Du1, Brian A Haley1 and Alan C Mix2, (1)Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States, (2)CEOAS, Oregon State University, Corvallis, OR, United States
Depositional regimes at the Brazilian Equatorial Margin during the Cenozoic (555206)
Luigi Jovane1, Daniel Pavani Alves1, David Iacopini2, Jorge JP Figueiredo3, Martino Giorgioni1, Cedric M John4, Gareth G Roberts5, Vittorio Maselli6, Daniele Maestrelli7 and Luca Basilone1, (1)USP University of Sao Paulo, São Paulo, Brazil, (2)University of Aberdeen, Geology and Petroleum Geology, Aberdeen, United Kingdom, (3)USP University of Sao Paulo, Exploration, São Paulo, Brazil, (4)Imperial College London, London, United Kingdom, (5)University of Southampton, Southampton, United Kingdom, (6)Dalhousie University, Earth and Environmental Sciences, Halifax, NS, Canada, (7)CNR Institute of Geosciences and Earth Resources, Pavia, Italy
Increasing ocean model resolution reveals impact of tuning eddy permitting models (561260)
Maike Sonnewald, Massachusetts Institute of Technology, Cambridge, MA, United States, A. J. George Nurser, National Oceanography Center, Liverpool, United Kingdom, Yvonne Firing, National Oceanography Center, Soton, Southampton, United Kingdom, Joel Hirschi, National Oceanography Centre, Southampton, United Kingdom, Andrew Coward, National Oceanography Center, Soton, Marine Systems Modelling, Southampton, United Kingdom and Patrick Hyder, Met. Office, Exeter, United Kingdom
Stirring Things Up - Productivity Boost or Just a Drain? Nutrient Sensitivity to Meridional Overturning in the Pliocene (561862)
Peter Jacobs1, Natalie Burls2, Harry J Dowsett3, Alexandra Jahn4, Heather L Ford5, Bette L Otto-Bliesner6 and Kim de Mutsert1, (1)George Mason University, Environmental Science and Policy, Fairfax, VA, United States, (2)Yale University, New Haven, CT, United States, (3)U.S. Geological Survey, Florence Bascom Geoscience Center, Reston, VA, United States, (4)National Center for Atmospheric Research, Boulder, CO, United States, (5)University of Cambridge, Earth Sciences, Cambridge, United Kingdom, (6)National Center for Atmospheric Research, Climate and Global Dynamics Laboratory, Boulder, CO, United States
Strong, consistent coupling between Southern Ocean deglacial ventilation and air-sea partitioning of CO2 over the past 1.5 Myrs (571913)
Sam Jaccard, University of Bern, Institute of Geological Sciences and Oeschger Centre for Climate Change Research, Bern, Switzerland, Adam Patrik Hasenfratz, ETH Swiss Federal Institute of Technology Zurich, Zurich, Switzerland, Julia Gottschalk, Lamont -Doherty Earth Observatory, Palisades, United States, Alfredo Martinez-Garcia, Max Plank Institut for Chemistry, Mainz, Germany and Gerald H Haug, Max Planck Institute for Chemistry, Mainz, Germany
Less remineralized carbon in the intermediate depth South Atlantic during Heinrich Stadial 1 (588546)
Matthew Lacerra, Princeton University, Princeton, NJ, United States, David C Lund, University of CT at Avery Point, Groton, CT, United States, Geoffrey Gebbie, Woods Hole Oceanographic Inst., Woods Hole, MA, United States, Delia Oppo, WHOI, Geology and Geophysics, Woods Hole, MA, United States, Jimin Yu, Australian National University, Research School of Earth Sciences, Canberra, ACT, Australia, Andreas Schmittner, Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States and Natalie Umling, American Museum of Natural History, New York City, United States
Millennial-Scale Changes in Benthic Foraminifera Stable Carbon Isotope Gradients in the Western Equatorial Atlantic (588796)
Caio Souza Goncalves1, Bruna B Dias2, Igor Venancio3, Douglas Villela De Oliveira Lessa2, Stefan Mulitza4, Andreas Mackensen5 and Ana Luiza Albuquerque2, (1)Universidade Federal Fluminense, Niteroi, Brazil, (2)UFF Federal Fluminense University, Niteroi, Brazil, (3)Center for Weather Forecasting and Climate Studies (CPTEC), National Institute for Space Research (INPE), Cachoeira Paulista, Brazil, (4)Univ Bremen, Bremen, Germany, (5)Alfred Wegner Institute for Polar and Marine Research, Bremerhaven, Germany, Bremerhaven, Germany
North Pacific Mid-Depth and Deep Water Ventilation During the Last Glacial Cycle: Circulation Patterns and Source Variations (604332)
Lester Lembke-Jene1, Ralf Tiedemann1, Weng-si (JC) Chao1, Xun Gong1, Lara Jacobi2, Jian-Jun Zou3, Xuefa Shi3 and Dirk Nürnberg2, (1)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Bremerhaven, Germany, (2)GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany, (3)First Institute of Oceanography, Ministry of Natural Resources, Qingdao, China
Evaluating the Formation of North Atlantic Deep Water through Marine Proxies at Eirik and Gardar Drifts (614887)
Ria Sarkar, Rutgers University New Brunswick, New Brunswick, NJ, United States, Lauren Neitzke Adamo, Rutgers University, Department of Earth and Planetary Sciences, Rutgers Geology Museum, New Brunswick, NJ, United States and James Wright, Rutgers University New Brunswick, EPS, New Brunswick, NJ, United States
Understanding deep ocean circulation changes between the present and last glacial maximum and their implications for ocean carbon storage (615545)
Malte Jansen, University of Chicago, Chicago, IL, United States, Alice Marzocchi, National Oceanography Centre, Southampton, United Kingdom and Louis-Philippe Nadeau, University of Quebec at Rimouski UQAR, Rimouski, QC, Canada
The pathways of the Pacific meridional overturning circulation (with applications to the warm Pliocene) (618775)
Matthew David Thomas, Yale University, Geology and Geophysics, New Haven, CT, United States, Alexey V Fedorov, Yale Univ, New Haven, CT, United States, Natalie Burls, Yale University, New Haven, CT, United States and Wei Liu, University of California Riverside, Riverside, United States
Consistent Changes in Nitrate Consumption in Two Sectors of the Antarctic Zone Through the Last Glacial Cycle (619249)
Xuyuan Ai1,2, Anja S Studer3, Daniel Mikhail Sigman1, Alfredo Martinez-Garcia2, François Fripiat2, Lena Thöle4, Elisabeth Michel5, Simone Moretti2, Eri Amsler6, Antoine Thévenaz6, Sam Jaccard6 and Gerald H Haug2, (1)Princeton University, Princeton, NJ, United States, (2)Max Planck Institute for Chemistry, Mainz, Germany, (3)University of Basel, Basel, Switzerland, (4)Utrecht University, Utrecht, Netherlands, (5)Laboratoire des Sciences du Climat et de l’Environnement, IPSL, Université Versailles‐St Quentin, CNRS, Gif sur Yvette, France, (6)University of Bern, Bern, Switzerland
Can we better constrain the timing of GNAIW variability in the Western Equatorial Atlantic and its relationship to high North Atlantic Climate during the last deglaciation? (627359)
Thomas P Guilderson, Lawrence Livermore National Laboratory, Center for Accelerator Mass Spectrometry, Livermore, CA, United States, Katherine A Allen, University of Maine, Earth & Climate Sciences, Orono, ME, United States, Mea S Cook, Williams College, Geosciences, Williamstown, MA, United States, Virginia J Ettwein, University College London, London, United Kingdom and Jordan P Landers
The role of wind strength and vertical mixing on the AMOC stability and carbon uptake during LGM and HS1 events. (634515)
Marlos P Goes1, Lisa Murphy Goes2 and Amy C Clement2, (1)University of Miami, Miami, FL, United States, (2)University of Miami, RSMAS, Miami, FL, United States
