HE43A:
Ice-Ocean Interactions and Circulation Around the Antarctic Margins IV


Session ID#: 37093

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. The annual cycle of sea ice formation, export and melt is critical to the formation of both Antarctic Bottom Water and Antarctic Intermediate Water, which together fill more than half of the global sub-surface ocean. 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. Though historically limited by the prohibitive costs of in situ observations and high-resolution models, recent field campaigns and focused model development efforts are now rapidly advancing our understanding of these processes. 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 authors particularly encourage submissions addressing ocean-sea ice interactions, warm water pathways from continental slope to grounding zones, and inter-connectivity between sectors of the Antarctic margins and the broader Southern Ocean.
Primary Chair:  Andrew Stewart, University of California Los Angeles, Atmospheric and Oceanic Sciences, Los Angeles, CA, United States
Co-chairs:  Andrew F Thompson, California Institute of Technology, Pasadena, CA, United States, Louise C Biddle, University of Gothenburg, Gothenburg, Sweden and Matthew H England, University of New South Wales, Climate Change Research Centre, Sydney, NSW, Australia
Moderators:  Louise C Biddle, University of Gothenburg, Gothenburg, Sweden, Andrew F Thompson, California Institute of Technology, Pasadena, CA, United States, Matthew H England, University of New South Wales, Climate Change Research Centre, Sydney, NSW, Australia and Andrew Stewart, University of California Los Angeles, Atmospheric and Oceanic Sciences, Los Angeles, CA, United States
Student Paper Review Liaison:  Matthew H England, University of New South Wales, Climate Change Research Centre, Sydney, NSW, Australia
Index Terms:

4203 Analytical modeling and laboratory experiments [OCEANOGRAPHY: GENERAL]
4207 Arctic and Antarctic oceanography [OCEANOGRAPHY: GENERAL]
4255 Numerical modeling [OCEANOGRAPHY: GENERAL]
4262 Ocean observing systems [OCEANOGRAPHY: GENERAL]
Cross-Topics:
  • IS - Ocean Observatories, Instrumentation and Sensing Technologies
  • OM - Ocean Modeling
  • PL - Physical Oceanography: Mesoscale and Larger
  • PS - Physical Oceanography: Mesoscale and Smaller

Abstracts Submitted to this Session:

Role of Tides on the Formation of the Antarctic Slope Front, Flux of Warm Water onto the Continental Shelves, and Antarctic Bottom Water Production (318818)
Laurence Padman1, Mar M. Flexas2, Alejandro Hector Orsi3, Michael Schodlok4, Dimitris Menemenlis5 and Susan L. Howard1, (1)Earth and Space Research, Seattle, WA, United States, (2)California Institute of Technology, Pasadena, CA, United States, (3)Texas A & M University, College Station, TX, United States, (4)University of California Los Angeles, Los Angeles, CA, United States, (5)Jet Propulsion Laboratory, Pasadena, CA, United States
Explaining the trend of Antarctic sea-ice over the past three decades (313959)
Ronald Kwok1, Zhan Su2, Andrew F Thompson2 and Dimitris Menemenlis1, (1)Jet Propulsion Laboratory, Pasadena, CA, United States, (2)California Institute of Technology, Pasadena, CA, United States
Freshening by glacial meltwater enhances melting of ice shelves and reduces formation of Antarctic Bottom Water (316439)
Alessandro Silvano, University of Tasmania, Quantitative Marine Science Program, Hobart, TAS, Australia, Stephen R Rintoul, Antarctic Climate & Ecosystems Cooperative Research Centre, University of Tasmania, Hobart, Australia, Hobart, Australia, Beatriz Pena-Molino, Antarctic Climate and Ecosystems Cooperative Research Centre, Hobart Tasmania 7001, Australia, Will R Hobbs, University of Tasmania, Hobart, TAS, Australia, Esmee van Wijk, CSIRO Oceans & Atmosphere Flagship, Hobart, Australia, Shigeru Aoki, Hokkaido University, Sapporo, Japan, Takeshi Tamura, Antarctic Climate and Ecosystems Cooperative Research Centre, Hobart, Australia and Guy Darvall Williams, ACE CRC, University of Tasmania, Hobart, Australia
The impact of sub-ice-shelf melting on sea-ice formation under different atmospheric forcing (312139)
Gustavo M Marques1, Matt Harrison2, Olga V Sergienko3, Alon A Stern3, Alistair Adcroft4 and Robert Hallberg2, (1)National Center for Atmospheric Research, Climate and Global Dynamics, Boulder, CO, United States, (2)Geophysical Fluid Dynamics Laboratory, Princeton, NJ, United States, (3)Princeton University, Princeton, NJ, United States, (4)Princeton University, Atmospheric and Oceanic Sciences, Princeton, NJ, United States

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