PL010:
The Fate of Antarctic Bottom Water: Ventilation, Circulation, and Mixing of the Abyssal Ocean


Session ID#: 28689

Session Description:
The bottom limb of the Meridional Overturning Circulation (BMOC) is delineated by the balance between the formation of Antarctic Bottom Water (AABW) through near surface buoyancy loss around Antarctica and the integrated gain of buoyancy and return flow through abyssal diapycnal mixing. The strength of this overturning constrains ocean heat and carbon storage with direct implications for climate.  We invite abstracts on the current state and variability of the production, circulation, and mixing of AABW in the abyssal ocean.  All platforms for observing and modeling the BMOC are welcome, from small-scale experiments to global-scale studies, including AABW formation processes, deep flow interaction with topography, and estimates of rates of deep ocean ventilation and overturning.  Studies may utilize data sets of repeat hydrography, moored arrays, deep Argo floats, or models to infer abyssal flow and properties around the world. Abstracts on the variability of AABW and the BMOC with implications for the global heat, carbon, and sea level rise budgets are particularly encouraged.
Primary Chair:  Sarah G Purkey, Scripps Institution of Oceanography, University of California San Diego, San Diego, CA, United States
Co-chairs:  Emily Rose Newsom, California Institute of Technology, Division of Geological and Planetary Sciences, Pasadena, CA, United States, Nathalie V Zilberman, University of California San Diego, La Jolla, CA, United States and Louis Clement, Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY, United States
Index Terms:

4513 Decadal ocean variability [OCEANOGRAPHY: PHYSICAL]
4532 General circulation [OCEANOGRAPHY: PHYSICAL]
4556 Sea level: variations and mean [OCEANOGRAPHY: PHYSICAL]
4568 Turbulence, diffusion, and mixing processes [OCEANOGRAPHY: PHYSICAL]
Cross-Topics:
  • HE - High Latitude Environments
  • OO - Ocean Obervatories
    *Use IS: Ocean Observatories, Instrumentation and Sensing Technologies*
  • PS - Physical Oceanography: Mesoscale and Smaller
  • PO - Physical Oceanography: Other

Abstracts Submitted to this Session:

Sonya Legg1, Einar Povl Abrahamsen2, Christian E. Buckingham2, Alexander Forryan3, Eleanor Frajka-Williams3, Stephen Matthew Griffies4, Michael Paul Meredith2, Sheldon Bacon3, Keith W Nicholls2, Sarah Nickford5, Kurt L Polzin6, Jean-baptiste Sallee7 and Carl Spingys3, (1)Princeton University, Princeton, NJ, United States, (2)British Antarctic Survey, Cambridge, United Kingdom, (3)University of Southampton, Southampton, United Kingdom, (4)NOAA/GFDL, NJ, United States, (5)Stony Brook University, School of Marine and Atmospheric Sciences, Stony Brook, NY, United States, (6)WHOI, Woods Hole, MA, United States, (7)LOCEAN - Sorbonne Universités - UPMC/CNRS/IRD/MNHN, Paris, France
Alberto Naveira Garabato1, Eleanor Frajka-Williams1, Alexander Forryan1, Carl Spingys1, Kurt L Polzin2, Michael Paul Meredith3, Einar Povl Abrahamsen3, Keith W Nicholls3, Christian E. Buckingham3, Sonya Legg4 and Stephen Matthew Griffies5, (1)University of Southampton, Southampton, United Kingdom, (2)WHOI, Woods Hole, MA, United States, (3)British Antarctic Survey, Cambridge, United Kingdom, (4)Princeton University, Princeton, NJ, United States, (5)NOAA/GFDL, NJ, United States
Shogo Urakawa, Hiroyuki Tsujino, Hideyuki Nakano, Kei Sakamoto, Goro Yamanaka and Takahiro Toyoda, Meteorological Research Institute, Tsukuba, Ibaraki, Japan
Xiaojun Yuan1, Libao Gao2, Claudia Fabiana Giulivi3 and Dexun Wei2, (1)Lamont -Doherty Earth Observatory, Palisades, NY, United States, (2)First Institute of Oceanography, State Oceanography Administration, Qingdao, China, (3)Columbia University of New York, Lamont-Doherty Earth Observatory, Palisades, NY, United States
Andreas M Thurnherr, Lamont-Doherty Earth Observatory, Palisades, NY, United States, Louis Clement, Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY, United States and Louis St Laurent, Woods Hole Oceanographic Insti, Woods Hole, MA, United States
Christian E. Buckingham1, Einar Povl Abrahamsen1, Michael Paul Meredith1, Alberto Naveira Garabato2 and Stephen Matthew Griffies3, (1)British Antarctic Survey, Cambridge, United Kingdom, (2)University of Southampton, Southampton, United Kingdom, (3)Geophysical Fluid Dynamics Laboratory, Princeton, NJ, United States
Ratnaksha Lele, Scripps Institution of Oceanography, La Jolla, CA, United States, Sarah G Purkey, Scripps Institution of Oceanography UCSD, La Jolla, CA, United States, Lynne D Talley, Scripps Institution of Oceanography, UC San Diego, UC San Diego, La Jolla, CA, United States and Sabine Mecking, Applied Physics Laboratory University of Washington, Kenmore, WA, United States
Louis Clement, Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY, United States and Andreas M Thurnherr, Lamont-Doherty Earth Observatory of Columbia University, New York, NY, United States