PC12B:
Physical and Biogeochemical Processes in the Southern Ocean: Observations, State Estimation, and Modeling II


Session ID#: 11507

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:  Stephen Riser, University of Washington, School of Oceanography, Seattle, WA, United States, Joellen L Russell, University of Arizona, Tucson, AZ, 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:  Kyle Armour, Massachusetts Institute of Technology, Cambridge, MA, United States and Stephen Riser, University of Washington, School of Oceanography, Seattle, WA, United States
Student Paper Review Liaison:  Igor V Kamenkovich, RSMAS, Miami, FL, United States
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:

PC12B-01
Variability in Global Deep Ocean Circulation from GRACE (91758)
Michael M Watkins1,2 and Carmen Boening1, (1)NASA Jet Propulsion Laboratory, Pasadena, CA, United States, (2)University of Texas at Austin, Center for Space Research, Austin, TX, United States
PC12B-02
Seasonal and Interannual variability in Surface Temperature and Salinity across the ACC in the Drake Passage from 2002 to 2014 (90411)
Kristin Lesley Fitzmorris and Janet Sprintall, Scripps Institution of Oceanography, Physical Oceanography, La Jolla, CA, United States
PC12B-03
Southern Ocean Deep Convection in Global Climate Models: A Driver of Sub-polar Gyre Strength and Drake Passage Transport Variability on Decadal Timescales (87111)
Erik Behrens1, Graham Rickard1, Olaf Morgenstern1, Torge Martin2, Annette Osprey3 and Manoj Mukund Joshi4, (1)National Institute of Water and Atmospheric Research (NIWA), Wellington, New Zealand, (2)GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany, (3)University of Reading, Reading, United Kingdom, (4)University of East Anglia, Centre for Ocean and Atmospheric Sciences, Norwich, United Kingdom
PC12B-04
Decadal to Centennial Southern Ocean Deep Convection Variability in CMIP5 Models and in the Kiel Climate Model (89453)
Annika Reintges1, Mojib Latif1,2, Torge Martin1, Wonsun Park1 and Richard John Greatbatch1, (1)GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany, (2)University of Kiel, Kiel, Germany
PC12B-05
Trends in Southern Ocean Eddy Kinetic Energy (88017)
Don P Chambers, University of South Florida Tampa, College of Marine Science, Tampa, FL, United States
PC12B-06
Multi-decadal trends in Southern Ocean eddy activity simulated by a high-resolution ocean model (89414)
Lavinia Patara, Claus W Boning and Arne Biastoch, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
PC12B-07
The Impact of the Ozone Hole on the Temperature and Salinity of the Southern Ocean (88772)
Abraham L Solomon, Columbia University of New York, Palisades, NY, United States, Lorenzo M Polvani, Columbia University, New York, NY, United States, Ryan P Abernathey, Lamont -Doherty Earth Observatory of Columbia University, Palisades, NY, United States and Karen L Smith, University of Toronto, Physical and Environmental Sciences, Toronto, ON, Canada
PC12B-08
Ice-atmosphere feedbacks dominate the response of the climate system to Drake Passage closure (88815)
Matthew H England1, David Karel Hutchinson2, Agus Santoso3 and Willem P Sijp2, (1)University of New South Wales, Climate Change Research Centre, Sydney, NSW, Australia, (2)University of New South Wales, Sydney, NSW, Australia, (3)Australian Research Council (ARC) Centre of Excellence for Climate Extremes, Level 4 Mathews Building, The University of New South Wales, Sydney, Australia
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