HE43B:
Ice-Ocean Interactions and Circulation around the Antarctic Margins II


Session ID#: 11362

Session Description:
Processes occurring at or close to the ice-ocean interface around Antarctica influence the state and circulation of a large proportion of the global ocean. Over 1/3 of the global sub-surface ocean is filled and ventilated by Antarctic Bottom Water, largely sourced from the Weddell and Ross Seas. Sea ice exported from coastal polynyas freshens surface waters further north, contributing to the formation of Antarctic Intermediate Water. Inflow of warm Circumpolar Deep Water beneath floating shelves of marine-terminating glaciers promotes retreat of the grounded portion of the ice sheet, and thus sea level rise. Yet our understanding of these processes has historically been limited by the prohibitive costs of in situ observations and high-resolution models. This session will showcase recent advances in understanding the physical processes occurring in the Antarctic marginal seas, across the Antarctic continental shelf and slope, and within the ocean cavities beneath floating ice shelves. Studies based on observations, numerical models and theory are all welcome. The conveners particularly encourage submissions addressing mechanisms that facilitate water mass exchanges across the Antarctic continental slope, the role of short-timescale flows like mesoscale eddies, tides, and dense water overflows, and processes occurring at the interface between the ocean and sea/shelf ice.
Primary Chair:  Andrew Stewart, University of California Los Angeles, Atmospheric and Oceanic Sciences, Los Angeles, CA, United States
Chairs:  Andrew F Thompson, California Institute of Technology, Pasadena, CA, United States, Pierre Dutrieux, NERC British Antarctic Survey, Cambridge, United Kingdom and Karen Assmann, University of Gothenburg, Gothenburg, Sweden
Moderators:  Andrew Stewart, University of California Los Angeles, Atmospheric and Oceanic Sciences, Los Angeles, CA, United States and Andrew F Thompson, California Institute of Technology, Pasadena, CA, United States
Student Paper Review Liaisons:  Andrew Stewart, University of California Los Angeles, Atmospheric and Oceanic Sciences, Los Angeles, CA, United States and Andrew F Thompson, California Institute of Technology, Pasadena, CA, United States
Index Terms:

4207 Arctic and Antarctic oceanography [OCEANOGRAPHY: GENERAL]
4540 Ice mechanics and air/sea/ice exchange processes [OCEANOGRAPHY: PHYSICAL]
4599 General or miscellaneous [OCEANOGRAPHY: PHYSICAL]
9310 Antarctica [GEOGRAPHIC LOCATION]
Co-Sponsor(s):
  • A - Air-sea Interactions and Upper Ocean Processes
  • OD - Ocean Observing and Data Management
  • TP - Turbulent Processes

Abstracts Submitted to this Session:

New Multi-Season Measurements of Currents and Hydrography from Profiling Floats and Altimetry in the Amundsen Sea: Implications for Antarctic Shelf-Slope Exchange and Sea-Ice Thermodynamics (93151)
James B Girton1, Kathleen B Dohan2 and Robin D Muench2, (1)University of Washington, Applied Physics Laboratory, Seattle, WA, United States, (2)Earth & Space Research, Seattle, WA, United States
Observations of Antarctic Slope Current Transport and Dense Water Flow in the Northwestern Weddell Sea (90934)
Marina V. C. Azaneu, University of East Anglia, School of Environmental Sciences, Norwich, NR4, United Kingdom, Karen J. Heywood, University of East Anglia, Norwich, NR4, United Kingdom, Bastien Yves Queste, University of East Anglia, Centre for Ocean and Atmospheric Sciences, Norwich, United Kingdom and Andrew F Thompson, California Institute of Technology, Pasadena, CA, United States
Sensitivity of Antarctic Bottom Water to Changes in Surface Buoyancy Fluxes (Invited) (89230)
Kate Snow1, Andrew M. Hogg1, Bernadette Sloyan2 and Stephanie Downes1, (1)Australian National University, Canberra, ACT, Australia, (2)CSIRO Marine and Atmospheric Research Hobart, Hobart, TAS, Australia
Mixing at the fringes of a rapidly melting Antarctic ice shelf (89685)
Sheldon Bacon, University of Southampton, National Oceanography Centre, Southampton, SO14, United Kingdom, Alexander Forryan, University of Southampton, National Oceanography Centre, Southampton, United Kingdom, Pierre Dutrieux, Applied Physics Laboratory University of Washington, Seattle, WA, United States, Liam Brannigan, University of Oxford, Physics, Oxford, United Kingdom, Louise C Biddle, University of East Anglia, Centre for Ocean and Atmospheric Sciences, Norwich, United Kingdom, Karen J. Heywood, University of East Anglia, Norwich, NR4, United Kingdom, Adrian Jenkins, NERC British Antarctic Survey, Cambridge, United Kingdom, Yvonne L Firing, Jet Propulsion Laboratory, Pasadena, CA, United States and Satoshi Kimura, Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan
Rapid Subsurface Warming of West Antarctic Peninsula Waters by East Antarctic Coastal Winds (93440)
Paul Spence, University of New South Wales, Climate Change Research Centre, Sydney, Australia
Mechanisms Modulating the Ocean Forcing of Pine Island Glacier (92339)
Benjamin Webber1, Karen J. Heywood1, David P Stevens2, Pierre Dutrieux3, Stan Jacobs4, Einar Povl Abrahamsen5, Adrian Jenkins5, Ho Kyung Ha6, Sang Hoon Lee7, Tae-Wan Kim7, Satoshi Kimura5, Karen Assmann8 and Anna Wahlin8, (1)University of East Anglia, Norwich, NR4, United Kingdom, (2)University of East Anglia, Norwich, United Kingdom, (3)Applied Physics Laboratory University of Washington, Seattle, WA, United States, (4)Columbia Univ, Palisades, NY, United States, (5)British Antarctic Survey, Cambridge, United Kingdom, (6)Inha University, Department of Ocean Sciences,, Incheon, Korea, Republic of (South), (7)Korea Polar Research Institute, Incheon, Korea, Republic of (South), (8)University of Gothenburg, Gothenburg, Sweden
Transport of ice shelf basal meltwater around Antarctica (92221)
Michael S Dinniman1, John Michael Klinck II1 and Laurence Padman2, (1)Old Dominion University, Norfolk, VA, United States, (2)Earth and Space Research, Seattle, WA, United States