HE44C:
Mechanisms for Variability, Circulation, and Transformation of Water Masses in the Southern Ocean III Posters
Session ID#: 85874
Session Description:
The Southern Ocean plays an important role in global climate; encircling the globe, linking the different ocean basins, and connecting the surface ocean with the abyss. The southern limb of the global meridional overturning circulation regulates the storage of heat and carbon in the deep ocean through transformation of deep water into bottom and intermediate water. The upwelling of nutrient-rich deep water further regulates primary productivity and the biological pumping of carbon into the deep ocean, thus affecting global biogeochemical cycling. The Antarctic Circumpolar Current and the meridional overturning circulation have historically been described in zonal-mean frameworks that neglect the potential contributions from local and regional processes. Recent studies show that localized processes including those due to the influence of topography and frontal dynamics shape the large-scale dynamics, upwelling, tracer distributions, and biogeochemistry in the Southern Ocean. This session aims to facilitate a discussion on the physical mechanisms that control the variability, circulation, and transformation of water masses in the Southern Ocean. Our focus will be on the importance of local dynamics in the Antarctic Circumpolar Current, the fluxes and upwelling of deep water across the Southern Ocean and onto the Antarctic shelf, and the mechanisms responsible for the export of bottom and intermediate water into the global ocean. To complement this, we encourage discussion on diabatic processes responsible for the transformation of these water masses by air-ice-sea interactions and mixing, as well as discussion linking the dynamics and water-mass transformation to the biogeochemical properties of the Southern Ocean.
Co-Sponsor(s):
Primary Chair: Annie Foppert, Centre for Southern Hemisphere Oceans Research, CSIRO Oceans and Atmosphere, Hobart, Australia, Hobart, TAS, Australia
Co-chairs: Edward Doddridge, University of Oxford, Oxford, United Kingdom, Dafydd Gwyn Evans, University of Southampton, Southampton, SO14, United Kingdom and Madeleine K Youngs, Massachusetts Institute of Technology, Cambridge, United States
Primary Liaison: Annie Foppert, University of Rhode Island, Narragansett, RI, United States
Moderators: Annie Foppert, University of Rhode Island, Narragansett, RI, United States and Dafydd Gwyn Evans, University of Southampton, Southampton, SO14, United Kingdom
Student Paper Review Liaison: Edward Doddridge, University of Oxford, Oxford, United Kingdom
Abstracts Submitted to this Session:
Drivers of Interannual Variability in Southeast Pacific Subantarctic Mode Water (Invited) (635448)
Rachael Sanders1,2, Andrew Meijers1, Paul Holland3 and Alberto Naveira Garabato2, (1)NERC British Antarctic Survey, Cambridge, United Kingdom, (2)University of Southampton, Southampton, United Kingdom, (3)British Antarctic Survey, Cambridge, United Kingdom
Eastward-propagating interannual variability in Southern Ocean deep mixed layers (650413)
Yiqun Lu1,2, Lynne D Talley3, Ivana Cerovecki4, Shang-Ping Xie5, Matthew R Mazloff3, Prof. Sarah T Gille, PhD3, Qinyu Liu1 and Yu Zhang1, (1)Ocean University of China, Qingdao, China, (2)Scripps Institution of Oceanography, La Jolla, CA, United States, (3)Scripps Institution of Oceanography, UCSD, La Jolla, United States, (4)Scripps Institution of Oceanography, United States, (5)University of California San Diego, Scripps Institution of Oceanography, La Jolla, United States
The Response of the Southern Ocean to Sudden and Persistent Extreme SAM Forcing (655939)
Kial Douglas Stewart, Australian National University, Research School of Earth Science, Canberra, ACT, Australia, Matthew H England, Univ New South Wales, Sydney, NSW, Australia and Andrew M Hogg, Australian National University and ARC Centre of Excellence for Climate Extremes, Research School of Earth Sciences, Canberra, ACT, Australia
Positive phase of SAM influences winter APO anomalies over the Southern Ocean (654879)
Cynthia D Nevison, INSTAAR/University of Colorado, Boulder, CO, United States, David R Munro, University of Colorado, Department of Atmospheric and Oceanic Sciences and Institute for Arctic and Alpine Research, Boulder, United States, Nicole S Lovenduski, University of Colorado, Department of Atmospheric and Oceanic Sciences, Boulder, CO, United States, Ralph F Keeling, Univ California San Diego, La Jolla, CA, United States, Manfredi Manizza, University of California San Diego, Scripps Institution of Oceanography, La Jolla, United States, Eric James Morgan, Scripps Institution of Oceanography, La Jolla, CA, United States and Christian Rödenbeck, Max Planck Institute for Biogeochemistry, Jena, Germany
Long term observed changes of the global and Southern Ocean surface layer (650850)
Jean-baptiste Sallee1, Pellichero Violaine2,3, Etienne Pauthenet4, Camille Akhoudas5 and Lucie Vignes4, (1)University Pierre and Marie Curie Paris VI, Paris, France, (2)University of Tasmania, IMAS, Melbourne, VIC, Australia, (3)University Pierre et Marie Curie, Paris VI, Paris, France, (4)Sorbonne Université, LOCEAN‐IPSL, CNRS/IRD/MNHN, Paris, France, (5)Sorbonne Université - CNRS/IRD/MNHN, LOCEAN, Paris, France
Time of Emergence of Human-Induced Climate Signal in the World Ocean Water-Masses (643054)
Yona Silvy1, Eric Guilyardi1, Jean-baptiste Sallee1 and Paul James Durack2, (1)LOCEAN-IPSL, CNRS/IRD/MNHN/Sorbonne Université, Paris, France, (2)Lawrence Livermore Nat. Lab., Program for Climate Model Diagnosis and Intercomparison, Livermore, CA, United States
Water mass transformation by surface buoyancy flux in the Southern Ocean and its possible impact on AMOC in CMIP6 experiments of JMA/MRI (645452)
Shogo Urakawa1, Hiroyuki Tsujino2, Hideyuki Nakano1, Takahiro Toyoda3, Kei Sakamoto4 and Goro Yamanaka3, (1)Meteorological Research Institute, Tsukuba, Japan, (2)Meteorological Research Institute, Japan Meteorological Agency, Tsukuba, Japan, (3)Meteorological Research Institute, Tsukuba, Ibaraki, Japan, (4)Meteorological Research Institute, Ibaraki, Japan
Impacts of ice-shelf melting on water mass transformation in the Southern Ocean from E3SM simulations (646803)
Hyein Jeong1, Xylar Asay-Davis2, Adrian K Turner1, Darin Scott Comeau1, Stephen F Price1, Ryan Abernathey3, Milena Veneziani1, Mark R Petersen1, Matthew J Hoffman4, Matthew R Mazloff5 and Todd Ringler1, (1)Los Alamos National Laboratory, Los Alamos, NM, United States, (2)Los Alamos National Laboratory, Fluid Dynamics and Solid Mechanics Group, Los Alamos, NM, United States, (3)Lamont-Doherty Earth Observatory, Palisades, United States, (4)Los Alamos National Laboratory, Fluid Dynamics and Solid Mechanics, Los Alamos, NM, United States, (5)Scripps Institution of Oceanography, UCSD, La Jolla, United States
Linking the Antarctic Circumpolar Current with Weddell Sea convection and with the meridional overturning circulation in a hierarchy of GFDL models (655151)
Sergey Molodtsov, Texas A & M University College Station, Department of Oceanography, College Station, TX, United States, Irina Marinov, University of Pennsylvania, Department of Earth and Environmental Science, Philadelphia, United States, Behzad Asadieh, University of Pennsylvania, Philadelphia, PA, United States, John Edward San Soucie, University of Pennsylvania, Department of Earth and Environmental Sciences, Philadelphia, PA, United States, Anna Cabre, Institute of Marine Science, Department of Physical and Technological Oceanography, Barcelona, Spain and Ron Maor, University of Pennsylvania, Philadelphia, United States
Ice loss induced by wind-induced anomalous heat storage in the Antarctic seasonal ice zone (646414)
Edward Doddridge, Massachusetts Institute of Technology, Earth, Atmospheric and Planetary Sciences, Cambridge, MA, United States, John C Marshall, MIT, Cambridge, United States, Jean-Michel Campin, M.I.T./EAPS, Cambridge, United States and Maxwell Kelley, NASA Goddard Institute for Space Studies, New York City, United States
Water-Mass Transformation in the Weddell Gyre (641534)
Shanice Bailey, Lamont Doherty Earth Observatory, New York, NY, United States; Columbia University of New York, Earth & Environmental Sciences, Palisades, NY, United States
Characterising the influence of deep-ocean eddies and fronts on the shelf seas of a sub-Antarctic Archipelago in the Southern Ocean: The Prince Edward Islands (644968)
Marcel Van den Berg, Oceans and Coasts research, Department of Forestry,Fisheries and the Environment, Cape Town, South Africa, Tarron Lamont, Oceans & Coasts Research, Department of Forestry, Fisheries and the Environment; University of Cape Town; Bayworld Centre for Research and Education, Department of Forestry, Fisheries and the Environment, Cape Town 8012, South Africa and Isabelle Jane Ansorge, University of Cape Town, Department of Oceanography, Cape Town, South Africa
Origin, pathways, and characteristics of deep-ocean mesoscale eddies influencing the shelf seas of a sub-Antarctic Archipelago in the Southern Ocean: The Prince Edward Islands (644917)
Tarron Lamont, Oceans & Coasts Research, Department of Forestry, Fisheries and the Environment; University of Cape Town; Bayworld Centre for Research and Education, Department of Forestry, Fisheries and the Environment, Cape Town 8012, South Africa and Marcel Van den Berg, Oceans and Coasts research, Department of Forestry,Fisheries and the Environment, Cape Town, South Africa
Along-slope variability of cross-slope eddy transport in East Antarctica (640064)
Annie Foppert, Centre for Southern Hemisphere Oceans Research, CSIRO Oceans and Atmosphere, Hobart, Australia, Hobart, TAS, Australia, Stephen R Rintoul, Antarctic Climate and Ecosystems Cooperative Research Centre (ACE CRC), Hobart, TAS, Australia and Matthew H England, Univ New South Wales, Sydney, NSW, Australia
Effect of horizontal resolution on the Southern Ocean circulation in the new GFDL OM4 model (639280)
Carolina O. Dufour, McGill University, Department of Atmospheric and Oceanic Sciences, Montreal, QC, Canada, Alistair Adcroft, Princeton University, Program in Atmospheric and Oceanic Sciences, Princeton, NJ, United States and Stephen Matthew Griffies, NOAA Geop Fluid Dynamics Lab, Princeton, NJ, United States
Mean and Seasonal Eddy Heat Fluxes Estimated from a 20-year Time Series of Upper-Ocean Observations in Drake Passage (644237)
Teresa K Chereskin1, Manuel Othon Gutierrez-Villanueva1 and Janet Sprintall2, (1)University of California San Diego, Scripps Institution of Oceanography, La Jolla, CA, United States, (2)University of California San Diego, Scripps Institution of Oceanography, La Jolla, United States
Southern Ocean standing meander and sea level anomalies: over 20 years of trends (649116)
Amelie Meyer, Australian Research Council Centre of Excellence for Climate Extremes, Hobart, TAS, Australia, Clothilde Langlais, CSIRO Marine and Atmospheric Research Hobart, Hobart, TAS, Australia, Navid Constantinou, Australian National University, Research School of Earth Sciences, Canberra, ACT, Australia, Benoit Legresy, CSIRO Oceans and Atmosphere, Hobart, TAS, Australia, Andrew M Hogg, Australian National University and ARC Centre of Excellence for Climate Extremes, Research School of Earth Sciences, Canberra, ACT, Australia and Nathaniel L. Bindoff, Univ Tasmania, Hobart, TAS, Australia
Processes Responsible for the Southern Ocean Heat Uptake and Redistribution under Anthropogenic Warming (657543)
Kewei Lyu1, Xuebin Zhang1, John Church2 and Quran Wu3, (1)CSIRO, Oceans & Atmosphere, Centre for Southern Hemisphere Oceans Research (CSHOR), Hobart, TAS, Australia, (2)University of New South Wales, Climate Change Research Centre, Sydney, NSW, Australia, (3)University of Reading, National Centre for Atmospheric Science–Climate, Department of Meteorology, Reading, United Kingdom
Description and Dynamics of the Santos Bifurcation (643681)
Ágata Piffer Braga, University of Massachusetts Dartmouth, New Bedford, MA, United States, Ilson C Da Silveira, Instituto Oceanografico - University of São Paulo, Sao Paulo, Brazil and Avijit Gangopadhyay, University of Massachusetts Dartmouth, New Bedford, United States
