PC11B:
Physical and Biogeochemical Processes in the Southern Ocean: Observations, State Estimation, and Modeling I


Session ID#: 9260

Session Description:
The Southern Ocean, south of 30°S, occupies just under one-third of the surface ocean area, yet it accounts for a disproportionate share of the vertical exchange of heat, carbon and nutrients between the deep ocean, the surface ocean and the atmosphere. Understanding the physical and biogeochemical processes that determine the Southern Ocean’s mean state, variability, and response to external forcing is critical to our understanding of the climate system as a whole, and for reducing uncertainties in climate projections. Recent advances in data collection, state estimation and modeling capabilities have finally established the necessary infrastructure to permit a deeper understanding of the Southern Ocean’s processes that are relevant to climate. Working toward this goal, this session will present new results based on modeling and/or observational efforts that investigate biogeochemical processes, large-scale and mesoscale circulation, mixing, as well as ocean-atmosphere and ocean-ice interactions.
Primary Chair:  Igor V Kamenkovich, RSMAS, Miami, FL, United States
Chairs:  Joellen L Russell, University of Arizona, Tucson, AZ, United States, Stephen Riser, University of Washington, School of Oceanography, Seattle, WA, United States, Ariane Verdy, Scripps Institution of Oceanography, UC San Diego, La Jolla, CA, United States, Anna Cabre, Instituto de Ciencias del Mar, Barcelona, Spain, Kyle Armour, Massachusetts Institute of Technology, Cambridge, MA, United States, Torge Martin, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany and Irina Marinov, University of Pennsylvania, Department of Earth and Environmental Sciences, Philadelphia, PA, United States
Moderators:  Igor V Kamenkovich, RSMAS, Miami, FL, United States and Stephen Riser, University of Washington, School of Oceanography, Seattle, WA, United States
Student Paper Review Liaison:  Torge Martin, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
Index Terms:

1635 Oceans [GLOBAL CHANGE]
4207 Arctic and Antarctic oceanography [OCEANOGRAPHY: GENERAL]
4532 General circulation [OCEANOGRAPHY: PHYSICAL]
4805 Biogeochemical cycles, processes, and modeling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
Co-Sponsor(s):
  • B - Biogeochemistry and Nutrients
  • OD - Ocean Observing and Data Management
  • PO - Physical Oceanography/Ocean Circulation

Abstracts Submitted to this Session:

PC11B-01
Observations of the Southern Ocean Meridional Overturning Circulation from Argo Data (91582)
Alison R Gray and Stephen Riser, University of Washington, School of Oceanography, Seattle, WA, United States
PC11B-02
Direct measurement of the cross-density overturning circulation in the Southern Ocean (90876)
Jean-baptiste Sallee1, James R Ledwell2, Sheldon Bacon3, Michael Paul Meredith4, Andrew J. Watson5, Marie-Jose Messias6, Jan David Zika3 and Neill Sutherland Mackay7, (1)University Pierre and Marie Curie Paris VI, Paris, France, (2)Woods Hole Oceanographic Institution, Woods Hole, MA, United States, (3)University of Southampton, Southampton, United Kingdom, (4)NERC British Antarctic Survey, Cambridge, United Kingdom, (5)University of Exeter, Exeter, United Kingdom, (6)University of Exeter, Geography, Exeter, United Kingdom, (7)National Oceanography Centre, Liverpool, United Kingdom
PC11B-03
Submesoscale dynamics at the Subantarctic Front in the Scotia Sea: Implications for vertical exchange and water mass transformation (92009)
Phil John Hosegood1, Kate Adams2, John Ryan Taylor3, Jean-baptiste Sallee4, Scott Bachman3 and Megan A Stamper5, (1)Plymouth University, School of Marine Science and Engineering, Plymouth, United Kingdom, (2)Plymouth University, Plymouth, PL4, United Kingdom, (3)University of Cambridge, Cambridge, United Kingdom, (4)University Pierre and Marie Curie Paris VI, Paris, France, (5)University of Cambridge, Department of Applied Mathematics and Theoretical Physics, Cambridge, United Kingdom
PC11B-04
Preconditioning of the Weddell Sea Polynya by the Ocean Mesoscale: Insights from an Eddying Climate Model (88233)
Carolina O. Dufour1, Adele K Morrison2, Ivy Frenger1, Hannah M Zanowski1, Stephen Matthew Griffies3 and Michael Winton3, (1)Princeton University, Program in Atmospheric and Oceanic Sciences, Princeton, NJ, United States, (2)Australian National University, Research School of Earth Sciences, Canberra, Australia, (3)NOAA/GFDL, Princeton, NJ, United States
PC11B-05
The ocean mixed layer under Southern Ocean sea-ice: seasonal cycle and forcing. (90939)
Pellichero Violaine1, Jean-baptiste Sallee1, Sunke Schmidtko2, Fabien Roquet3 and Jean-Benoit Charrassin4, (1)University Pierre and Marie Curie Paris VI, Paris, France, (2)GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany, (3)Department of Meteorology (MISU), Stockholm University, S-106 91 Stockholm, Sweden, Sweden, (4)Sorbonne Universités, UPMC Univ., Paris 06, UMR 7159 CNRS-IRD-MNHN, LOCEAN-IPSL, Paris, France
PC11B-06
Reshaping the Antarctic Circumpolar Current via Antarctic Bottom Water Export (91906)
Andrew Stewart, University of California Los Angeles, Atmospheric and Oceanic Sciences, Los Angeles, CA, United States and Andrew M. Hogg, Australian National University, Canberra, ACT, Australia
PC11B-08
Potential vorticity and across ACC eddy transport in the Upper Circumpolar Deep Waters (92051)
Dhruv Balwada1, Christopher J Roach1, Kevin G Speer1 and Bruno Deremble2, (1)Florida State University, Geophysical Fluid Dynamics Institute, Tallahassee, FL, United States, (2)Florida State Univ, Tallahassee, FL, United States
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