PC52A:
The Role of the Southern Ocean in the Global Carbon Cycle II


Session ID#: 36875

Session Description:
The Southern Ocean is estimated to account for approximately half of the global oceanic sink of anthropogenic carbon, thus playing a key role in the climate system. Changes in the carbon cycle in this region are also thought to exert a strong influence on glacial-interglacial cycles. Recent work has highlighted large interannual variability in the Southern Ocean sink, and new observational estimates of the carbon cycle are emerging from biogeochemical floats and atmospheric measurements. The Southern Ocean remains, however, the basin least constrained by observations, with the largest disagreement among climate models and between models and observations. Changes to our understanding of the Southern Ocean carbon cycle have significant implications for the carbon budgets of the atmosphere and land components of the climate system. We invite abstracts that investigate these topics in both the modern and paleo-climate eras, in particular the magnitude and spatial distribution of the different parts of the Southern Ocean carbon cycle; the variability of the carbon cycle on seasonal to decadal timescales and centennial to glacial-interglacial timescales; and the impact on and interactions with the atmosphere, land, and world ocean.
Primary Chair:  Alison R Gray, University of Washington, School of Oceanography, Seattle, WA, United States
Co-chairs:  Laure Resplandy, Princeton University, Department of Geosciences, Princeton, NJ, United States, Carolina O. Dufour, Department of Atmospheric and Oceanic Sciences, McGill University, Montreal, Canada and Ralph F Keeling, University of California-San Diego, Scripps Institution of Oceanography, La Jolla, CA, United States
Moderators:  Laure Resplandy, Princeton University, Department of Geosciences, Princeton, NJ, United States, Alison R Gray, University of Washington, School of Oceanography, Seattle, United States and Carolina O. Dufour, Department of Atmospheric and Oceanic Sciences, McGill University, Montreal, Canada
Student Paper Review Liaison:  Alison R Gray, University of Washington, School of Oceanography, Seattle, United States
Index Terms:

1610 Atmosphere [GLOBAL CHANGE]
1616 Climate variability [GLOBAL CHANGE]
4806 Carbon cycling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4912 Biogeochemical cycles, processes, and modeling [PALEOCEANOGRAPHY]
Cross-Topics:
  • AI - Air-Sea Interactions
  • BN - Biogeochemistry and Nutrients
  • HE - High Latitude Environments

Abstracts Submitted to this Session:

Implications for the Global Carbon Budget of a Southern Ocean CO2 Source Detected by SOCCOM BGC-Argo Floats (319516)
Jorge L Sarmiento, Princeton University, Atmospheric and Oceanic Sciences Program, Princeton, NJ, United States, Alison R Gray, University of Washington, School of Oceanography, Seattle, United States, David F Baker, Colorado State University, CIRA, Fort Collins, United States, Seth M Bushinsky, Princeton University, Atmospheric and Oceanic Sciences, Princeton, NJ, United States, Laure Resplandy, Princeton University, Department of Geosciences, Princeton, NJ, United States, Christian Rödenbeck, Max Planck Institute for Biogeochemistry, Jena, Germany and Peter Landschuetzer, Max Plank Institute for Meteorology, Hamburg, Germany
Variability and change in Southern Ocean carbon: The Drake Passage bellwether (312892)
Amanda R Fay, Lamont-Doherty Earth Observatory, Palisades, NY, United States, Nicole S Lovenduski, University of Colorado, Department of Atmospheric and Oceanic Sciences, Boulder, CO, United States, Galen A McKinley, Columbia University and Lamont-Doherty Earth Observatory, New York, United States, David R Munro, NOAA, Global Monitoring Laboratory, Boulder, United States, Colm Sweeney, Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, United States, Britton B Stephens, NSF National Center for Atmospheric Research, Earth Observing Laboratory, Boulder, United States, Peter Landschutzer, ETH Zurich, Zurich, Switzerland, Nancy L Williams, Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States and Alison R Gray, University of Washington, School of Oceanography, Seattle, United States
Coccolithophore Controls on Southern Ocean Biogeochemistry (317493)
Cara Nissen, ETH Zurich, Environmental Physics, Institute of Biogeochemistry and Pollutant Dynamics, Zurich, Switzerland, Meike Vogt, ETH Swiss Federal Institute of Technology Zurich, Zurich, Switzerland, Matthias Munnich, Environmental Physics, Institute of Biogeochemistry and Pollutant Dynamics, ETH Zürich, Environmental Systems Science, Zurich, Switzerland and Nicolas Gruber, Center for Climate Systems Modeling, ETH Zurich, Zurich, Switzerland
Biogeochemical Impacts of Temporally Varying Iron Supply to the Southern Ocean (321542)
Charlotte Laufkötter1, John P Dunne2, Stuart M Evans3,4, Paul A Ginoux3, Jasmin G John3, Sergey Malyshev5, Elena Shevliakova6, Alon A Stern7 and Charles A Stock2, (1)Climate and Environmental Phyisics & Oeschger Centre for Climate Change Research, University of Bern, Bern, Switzerland, (2)NOAA Geophysical Fluid Dynamics Laboratory, Princeton, United States, (3)Geophysical Fluid Dynamics Laboratory, Princeton, NJ, United States, (4)University of Buffalo, Department of Geography, Buffalo, NY, United States, (5)NOAA Geophysical Fluid Dynamics Laboratory, Princeton, NJ, United States, (6)GFDL-Princeton University Cooperative Institute for Climate Science, Princeton, NJ, United States, (7)Princeton University, Princeton, United States
The Fate of Carbon and Nutrients Exported out of the Southern Ocean (320902)
Judith Hauck, Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research, Marine Biogeosciences, Bremerhaven, Germany, Andrew Lenton, CSIRO Hobart, Hobart, TAS, Australia, Clothilde Langlais, CSIRO Marine and Atmospheric Research Hobart, Hobart, TAS, Australia and Richard Matear, CSIRO, Oceans & Atmosphere, Hobart, TAS, Australia
Deep-sea coral evidence for millennial and centennial scale changes in Southern Ocean carbon chemistry (316993)
Andrea Burke1, James William Buchanan Rae2, Joe Stewart3, Laura Robinson4, Jess F Adkins5, Tianyu Chen3, Catherine Sarah Cole6, Eloise Littley2, Dan C Nita6, Ben Taylor2 and Li Tao3,7, (1)University of St Andrews, School of Earth and Environmental Sciences, St Andrews, United Kingdom, (2)University of St Andrews, School of Earth and Environmental Sciences, St Andrews, KY16, United Kingdom, (3)University of Bristol, Bristol, United Kingdom, (4)University of Bristol, Earth Sciences, Bristol, United Kingdom, (5)California Institute of Technology, Pasadena, CA, United States, (6)University of St Andrews, St Andrews, United Kingdom, (7)Nanjing University of Information Science &Technology, Nanjing, China
Deep-sea coral evidence for lower Southern Ocean surface nitrate concentrations during the last ice age (303763)
Dr. Xingchen Tony Wang, PhD1, Daniel Mikhail Sigman2, Maria Prokopenko3, Jess F Adkins1, Sophia Hines4, Junyi Chai5, Anja S Studer6, Alfredo Martinez-Garcia6, Tao Li7, Tianyu Chen7 and Gerald Hermann Haug6, (1)California Institute of Technology, Pasadena, CA, United States, (2)Princeton University, Geosciences, Princeton, United States, (3)Pomona College, Claremont, CA, United States, (4)Woods Hole Oceanographic Institution, Marine Chemistry & Geochemistry, Woods Hole, United States, (5)Princeton University, Princeton, NJ, United States, (6)Max Planck Institute for Chemistry, Mainz, Germany, (7)University of Bristol, Bristol, United Kingdom
Mechanisms Controlling Ocean Carbon Uptake as the Earth Entered the Last Ice Age (312466)
Karen Elizabeth Kohfeld, Simon Fraser University, School of Resource and Environmental Management and School of Environmental Science, Burnaby, Canada and Zanna Chase, University of Tasmania, Institute for Marine and Antarctic Studies, Hobart, TAS, Australia

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