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Session Proposal: Physical and Biogeochemical Processes on the Warm Antarctic Continental Shelves (AGU25)

OS019
Physical and Biogeochemical Processes on the Warm Antarctic Continental Shelves

Session ID#: 251441

Session Description:
The "warm" continental shelves of West Antarctica, which include the Amundsen and Bellingshausen seas and the West Antarctic Peninsula, are characterized by enhanced on-shelf transport of Circumpolar Deep Water that helps determine on-shelf hydrographic and biogeochemical properties. This warm water also interacts with ice shelves, influencing vertical mixing, overturning rates and ice shelf mass loss, and potentially triggering marine ice sheet instabilities. Warm shelf regions are undergoing rapid, climate-sensitive changes, which have important implications for ocean circulation, biological production and biogeochemical exchange over spatial scales that may extend downstream to the Ross Sea and offshore waters of the Antarctic Circumpolar Current. For this interdisciplinary session, we invite contributions that focus on both observational and modeling studies of ocean circulation, sea ice-ocean and ice shelf-ocean interactions, biogeochemical processes and biological production in Antarctic warm-shelf settings. We are especially interested in studies that explore links among these thematic topics.
Co-Sponsor(s):
  • C - Cryosphere
  • GC - Global Environmental Change
Index Terms:

4207 Arctic and Antarctic oceanography [OCEANOGRAPHY: GENERAL]
4273 Physical and biogeochemical interactions [OCEANOGRAPHY: GENERAL]
4540 Ice mechanics and air/sea/ice exchange processes [OCEANOGRAPHY: PHYSICAL]
4875 Trace elements [OCEANOGRAPHY: CHEMICAL]
Primary Convener:  Peter Sedwick, Old Dominion University, Norfolk, VA, United States
Conveners:  Kiya L Riverman, University of Portland, Portland, OR, United States, Robert M Sherrell, Rutgers University, Departments of Marine and Coastal Sciences and Earth and Planetary Sciences, New Brunswick, United States and Andrew F Thompson, California Institute of Technology, Pasadena, CA, United States
Student/Early Career Convener:  Madeline Mamer, Georgia Institute of Technology Main Campus, Earth and Atmospheric Sciences, Atlanta, United States
 
Accelerated Anthropogenic CO₂ Accumulation and Ocean Acidification in the Ross Sea: Influence of Amundsen Sea Processes (1852904)
Keyhong Park1, Ahra Mo2, Tae-Wook Kim3, Jisoo Park4 and Jung-ok Choi2, (1)Korea Polar Research Institute, Incheon, Korea, Republic of (South), (2)Korea Polar Research Institute, Incheon, South Korea, (3)Korea University, Environmental Science & Ecological Engineering, Seoul, South Korea, (4)KOPRI Korea Polar Research Institute, Incheon, South Korea
 
Biology dominates seasonal carbon uptake at high latitudes along the West Antarctic Peninsula (Invited) (1865182)
Jessie S Turner, Old Dominion University, Norfolk, United States, David R Munro, University of Colorado Boulder, Cooperative Institute for Research in Environmental Sciences, Boulder, United States, Amanda R Fay, Columbia University and Lamont-Doherty Earth Observatory, New York, United States, Sharon Elisabeth Stammerjohn, University of Colorado Boulder, Boulder, United States, Heather Hyewon Kim, Woods Hole Oceanographic Institute, Woods Hole, United States, Oscar Schofield, Rutgers University, Center of Ocean Observing Leadership, School of Environmental and Biological Sciences, New Brunswick, United States and Heidi M Dierssen, University of Connecticut Avery Point, Groton, United States
 
Sniffing Out Polonium: Aerosol ²¹⁰Po/²¹⁰Pb Ratios Trace Volatile Emissions from the Amundsen Sea Polynya (1866694)
Ziran Wei, Louisiana State University, Baton Rouge, LA, United States, Kirk Cochran, Stony Brook University, Stony Brook, NY, United States, Mark P Stephens, PhD, Florida International University, Applied Research Center, Miami, FL, United States, Dr. Wokil Bam, PhD, University of Southern Mississippi, Stennis Space Center, MS, United States and Kanchan Maiti, Louisiana State University, Department of Oceanography and Coastal Sciences, Baton Rouge, United States
 
Assessment of the Influence of Natural and Anthropogenic Lead (Pb) in the Amundsen Sea, West Antarctica (1870852)
Yerim Kim1, Teagan Bellitto1, Jessica N Fitzsimmons1, Edward A Boyle2 and Franco Marcantonio3, (1)Texas A&M University College Station, Oceanography, College Station, United States, (2)Massachusetts Institute of Technology, Cambridge, United States, (3)Texas A&M University College Station, Geology & Geophysics, College Station, United States
 
Thwaites Eastern Ice Shelf Cavity Observations Reveal Multi-year Sea Ice Dynamics and Deep-Water Warming in Pine Island Bay, West Antarctica (Invited) (1877764)
Christian Wild1,2, Tasha Snow3,4, Tiago Segabinazzi Dotto5, Peter E D Davis6, Scott Tyler7, Ted A Scambos8, Erin C Pettit2 and Karen J. Heywood9, (1)University of Tübingen, Department of Geosciences, Tübingen, Germany, (2)Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, United States, (3)University of Maryland College Park, College Park, United States, (4)NASA Goddard Space Flight Center, Greenbelt, United States, (5)National Oceanography Centre, Southampton, United Kingdom, (6)NERC British Antarctic Survey, Cambridge, United Kingdom, (7)University of Nevada, Reno, Department of Geological Sciences and Engineering, Reno, NV, United States, (8)University of Colorado, Boulder, Boulder, Colorado, United States, (9)University of East Anglia, Centre for Ocean and Atmospheric Sciences, School of Environmental Science, Norwich, NR4, United Kingdom
 
Dissolved Iron, Manganese and Aluminum in the Amundsen Sea, Antarctica: Results from the GEOTRACES GP17-ANT Expedition (1880433)
Peter Sedwick1, Joseph A Resing2, Bettina M Sohst3, Tara Williams3, Ian Kapinos3 and Scientific Team of GEOTRACES GP17-ANT, (1)Old Dominion University, Norfolk, VA, United States, (2)University of Washington Seattle Campus, School of Oceanography, Seattle, United States, (3)Old Dominion University, Norfolk, United States
 
Mid-Century Projections for the Amundsen Sea Polynya (Western Antarctica) (1897659)
Pierre St-Laurent, Virginia Institute of Marine Science, Gloucester Point, VA, United States, Robert M Sherrell, Rutgers University, Departments of Marine and Coastal Sciences and Earth and Planetary Sciences, New Brunswick, United States, Patricia L Yager, University of Georgia, Athens, GA, United States, Sharon Elisabeth Stammerjohn, University of Colorado Boulder, Boulder, United States, Ted Maksym, Woods Hole Oceanographic Inst, Woods Hole, United States and Michael S Dinniman, Old Dominion University, Center for Coastal Physical Oceanography, Norfolk, VA, United States
 
Tracking Glacial Meltwater and Circumpolar Deep Water Distribution in the Western Amundsen Sea using Stable Oxygen Isotopes (1901591)
Azmair Bains, California State University Sacramento, Sacramento, CA, United States, Amy J Wagner, California State University Sacramento, Department of Geology, Sacramento, CA, United States, Christina L Wiederwohl, Texas A&M University College Station, Oceanography, College Station, United States and Elisabeth L Sikes, Rutgers University, New Brunswick, United States
 
Mercury Methylators in the Amundsen Sea (1915245)
Ran Jin, University of Michigan Ann Arbor, Ann Arbor, MI, United States, Marissa Despins, University of California Santa Cruz, Santa Cruz, United States, Carl H Lamborg, University of California Santa Cruz, Santa Cruz, CA, United States, Robert P Mason, University of Connecticut, Marine Sciences, Groton, United States and Silvia E Newell, Wright State University Main Campus, Dayton, United States
 
Estimating Atmospheric Dust and Iron Fluxes Along the GEOTRACES GP17-OCE Transect, Integrating Lateral Transport of Thorium through Water Masses (1916533)
Kazeem Ojuade, University of Southern Mississippi, Stennis Space Center, MS, United States, Christopher T Hayes, University of Southern Mississippi, School of Ocean Science and Engineering, Stennis Space Center, United States, Anne Leal, Columbia University, Department of Earth and Environmental Sciences, New York, United States, Robert F Anderson, Lamont Doherty Earth Observatory of Columbia Univeristy, Palisades, United States, Martin Q Fleisher, Lamont -Doherty Earth Observatory of Columbia University, Palisades, United States, R. Lawrence Edwards, University of Minnesota, Department of Earth Sciences, Minneapolis, United States and Juzer Shaikh, University of Minnesota, Department of Earth Science, Minneapolis, United States
 
Changing, fast and slow: Oceanographic trends and interannual variability from three decades of observations along the west Antarctic Peninsula (Invited) (1919016)
Carlos F Moffat1, Michael Cappola1, Sharon Elisabeth Stammerjohn2, Michael Paul Meredith3, Hugh J Venables3 and Oscar Schofield4, (1)University of Delaware, College of Earth, Ocean and Environment, Newark, DE, United States, (2)University of Colorado Boulder, Boulder, United States, (3)NERC British Antarctic Survey, Cambridge, United Kingdom, (4)Rutgers University, Center of Ocean Observing Leadership, School of Environmental and Biological Sciences, New Brunswick, United States
 
Rare Earth Element seawater systematics on the Amundsen Sea Ice Shelves, West Antarctica (1930862)
Gabriel de Souza Franco, University of South Carolina, School of Earth, Ocean and Environment, Columbia, United States, Weiming Ding, University of Minnesota-Twin Cities, Minneapolis, United States, Xin-Yuan Zheng, University of Minnesota Twin Cities, Department of Earth and Environmental Sciences, Minneapolis, United States, Francesca Melia, University of South Carolina, Columbia, United States and Michael Bizimis, University of South Carolina, School of Earth-Ocean-Environment, Columbia, United States
 
Linkage of Primary Productivity to Spatial Patterns and Composition of Suspended Particles in the Amundsen Sea (US GEOTRACES GP17-ANT) (1936912)
Thao Vy Le, University of California Santa Cruz, Santa Cruz, CA, United States, Phoebe J Lam, University of California Santa Cruz, Department of Ocean Sciences, Santa Cruz, CA, United States, Jong-Mi Lee, University of California Santa Cruz, Ocean Sciences, Santa Cruz, CA, United States, Debbrota Mallick, University of South Alabama, Mobile, United States and Daniel C. Ohnemus, Skidaway Institute of Oceanography, UGA Dept. of Marine Sciences, Savannah, United States
 
Mapping iron ligands and revealing molecular signatures of iron limitation in the Southern Ocean by coupling LC-ICPMS and LC-HRMS analysis (1952225)
Anil Timilsina1, Nicole R R Coffey2, Iulia Streanga3, Jinxuan Li3, Daniel Repeta3 and Rene Boiteau1, (1)University of Minnesota, Department of Chemistry, Minneapolis, United States, (2)University of Minnesota, Department of Earth and Environmental Sciences, Minneapolis, United States, (3)Woods Hole Oceanographic Institution, Marine Chemistry and Geochemistry, Woods Hole, United States
 
Siderophore production in the Southern Ocean under high and low iron conditions (1952383)
Randelle M Bundy1, Kristen N Buck2, Bethany D. Jenkins3, Phoebe Dreux Chappell4, Daniel Repeta5, Alexa Sterling6, Laura Z. Holland3, Shannon Yang7, Leo Mahieu8 and Laura Moore9, (1)University of Washington Seattle Campus, School of Oceanography, Seattle, United States, (2)Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, United States, (3)University of Rhode Island, Cell and Molecular Biology, Kingston, RI, United States, (4)Old Dominion University, Ocean, Earth and Atmospheric Sciences, Norfolk, United States, (5)Woods Hole Oceanographic Institution, Marine Chemistry and Geochemistry, Woods Hole, MA, United States, (6)Ocean and Coastal Protection, Environmental Protection Agency, Boston, United States, (7)University of South Florida, College of Marine Sciences, St Petersberg, United States, (8)Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States, (9)Oregon State University, Corvallis, OR, United States
 
Climate-sensitive Carbon Cycling Adjacent to a Melting Ice Shelf in West Antarctica (1955948)
Patricia L Yager, University of Georgia, Athens, GA, United States, Jackson Vassy, University of Georgia, Athens, United States, Casey Schine, Middlebury College, Biology, Middlebury, VT, United States and Sharon Elisabeth Stammerjohn, University of Colorado Boulder, Boulder, United States
 
What is the Potential for CO2 Outgassing from the Buoyant Upwelling of Modified Circumpolar Deep Water in the Amundsen Sea Polynya? (1956788)
Jackson Vassy1, Sharon Elisabeth Stammerjohn2 and Patricia L Yager1, (1)University of Georgia, Athens, GA, United States, (2)University of Colorado Boulder, Boulder, United States
 
Particulate Iron Delivered by the Meltwater Pump is Bioavailable to Amundsen Sea Phytoplankton: Characterizing pFe Speciation and Elemental Stoichiometry of Natural Particles (1958941)
Katherine Mateos, University of California Santa Cruz, Santa Cruz, CA, United States, Allison Laubach, University of California Santa Cruz, Ocean Sciences, Santa Cruz, United States and Phoebe J Lam, University of California Santa Cruz, Department of Ocean Sciences, Santa Cruz, CA, United States
 
Particulate Iron Delivered by the Meltwater Pump is Bioavailable to Amundsen Sea Phytoplankton: Effect on Phytoplankton Community Composition (1959457)
Kate Wang, University of California Santa Cruz, Santa Cruz, United States, Katherine Mateos, University of California Santa Cruz, Santa Cruz, CA, United States, Phoebe J Lam, University of California Santa Cruz, Department of Ocean Sciences, Santa Cruz, CA, United States and Allison Laubach, University of California Santa Cruz, Ocean Sciences, Santa Cruz, United States
 
The characteristics of organic iron-binding ligands over the warm ice shelf of the Amundsen Sea (U.S. GEOTRACES GP17-ANT) (1963324)
Leo Mahieu, Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States, Kristen N Buck, Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, United States, Randelle M Bundy, University of Washington Seattle Campus, School of Oceanography, Seattle, United States, Laura Moore, Oregon State University, Corvallis, OR, United States, Salvatore Caprara, University of South Florida, College of Marine Science, St Petersburg, United States, Joseph Resing, Cooperative Institute for Climate, Ocean, and Ecosystem Studies, University of Washington, Seattle, United States, Phoebe J Lam, University of California Santa Cruz, Department of Ocean Sciences, Santa Cruz, CA, United States, Robert M Sherrell, Rutgers University, Departments of Marine and Coastal Sciences and Earth and Planetary Sciences, New Brunswick, United States and Peter Sedwick, Old Dominion University, Department of Ocean, Earth and Atmospheric Sciences, Norfolk, VA, United States
 
Iron Sources and Biogeochemistry in the Amundsen Sea, West Antarctica: Ice Shelf Processes and Glacial Meltwater (1967252)
Venkatesh Chinni, Rutgers University New Brunswick, Department of Marine and Coastal Sciences, New Brunswick, NJ, United States, Janelle Steffen, Texas A&M University, Department of Oceanography, College Station, United States, Lisa Herbert, Florida State University, Department of Earth, Ocean, and Atmospheric Science, Florida, United States, Hilde Oliver, Woods Hole Oceanographic Institution, Applied Ocean Physics & Engineering, Woods Hole, MA, United States, Sharon Elisabeth Stammerjohn, University of Colorado Boulder, Boulder, United States, Pierre St-Laurent, Virginia Institute of Marine Science, William & Mary, Gloucester Point, United States, Julia Wellner, University of Houston, Earth and Atmospheric Sciences, Houston, United States, Patricia L Yager, University of Georgia, Athens, GA, United States, Tim Conway, University of South Florida, College of Marine Science, St. Petersburg, United States, Jessica N Fitzsimmons, Texas A&M University College Station, Oceanography, College Station, United States and Robert M Sherrell, Rutgers University, Departments of Marine and Coastal Sciences and Earth and Planetary Sciences, New Brunswick, United States
 
The Marine Sedimentary Record of the Abbot Ice Shelf Since the Last Glacial Maximum, West Antarctica (1967441)
Marianne G Heberlein1, Rebecca L Totten2, Claus-Dieter Hillenbrand3, Colton Byrne1, Megan Hansen4, Jacob Helgeson2, Frank Oliver Nitsche5, James Smith3, Julia Wellner6, Lauren Miller Miller7, Robert D Larter3, Kelly Hogan3, Alastair GC Graham8 and John B Anderson9, (1)University of Alabama, Geological Sciences, Tuscaloosa, United States, (2)University of Alabama, Geological Sciences, Tuscaloosa, AL, United States, (3)British Antarctic Survey, Cambridge, United Kingdom, (4)University of Alabama, Tuscaloosa, United States, (5)Lamont-Doherty Earth Observatory of Columbia University, Palisades, United States, (6)University of Houston, Earth and Atmospheric Sciences, Houston, United States, (7)University of Virginia, Department of Environmental Sciences, Charlottesville, United States, (8)Cardiff University, Cardiff, United Kingdom, (9)Rice University, Department of Earth, Environmental and Planetary Sciences, Houston, United States
 
Investigating Proxies for Biological Productivity from Seafloor Surface Sediments, Amundsen Sea Embayment, West Antarctica (1971325)
Colton Byrne1, Rebecca L Totten2, Claus-Dieter Hillenbrand3, Marianne G Heberlein1, Jacob Helgeson2, James Smith3, Julia Wellner4 and Robert D Larter3, (1)University of Alabama, Geological Sciences, Tuscaloosa, United States, (2)University of Alabama, Geological Sciences, Tuscaloosa, AL, United States, (3)British Antarctic Survey, Cambridge, United Kingdom, (4)University of Houston, Houston, TX, United States
 
Distribution of Novel Hydrophilic Iron-Binding Ligands in the Amundsen Sea (1977454)
Nicole R R Coffey1, Anil Timilsina2, Jingxuan LI3, Iulia-Madalina Streanga4, Daniel Repeta5 and Rene Boiteau2, (1)University of Minnesota Twin Cities, Minneapolis, MN, United States, (2)University of Minnesota, Department of Chemistry, Minneapolis, United States, (3)MIT-WHOI Joint Program, Chemical Oceanography, Woods Hole, MA, United States, (4)Woods Hole Oceanographic Institution, Woods Hole, United States, (5)Woods Hole Oceanographic Institution, Marine Chemistry and Geochemistry, Woods Hole, MA, United States
 
Labile particulate trace metal distributions on the GP17-ANT cruise in the Amundsen Sea (1979543)
Phoebe J Lam, University of California Santa Cruz, Department of Ocean Sciences, Santa Cruz, United States and Jong-Mi Lee, University of California Santa Cruz, Ocean Sciences, Santa Cruz, CA, United States
 
Investigating ventilation in the Amundsen Sea, Antarctica using an eddy-permitting regional ocean model (1983651)
Lauren Kowalski, University of Rhode Island, Graduate School of Oceanography, Narragansett, United States, Yoshihiro Nakayama, Dartmouth College, Thayer School of Engineering, Hanover, United States and Brice Loose, University of Rhode Island, Narragansett, RI, United States
 
A Quarter Century of Net Primary Production in the Amundsen Sea: Interannual Trends and New Insights into Coastal Current Dynamics from Satellite Observations (1983654)
Casey Schine, Middlebury College, Biology, Middlebury, VT, United States, Sharon Elisabeth Stammerjohn, University of Colorado Boulder, Boulder, United States, Gert van Dijken, Stanford University, Earth System Science, Stanford, CA, United States, Pierre St-Laurent, Virginia Institute of Marine Science, William & Mary, Gloucester Point, United States and Patricia L Yager, University of Georgia, Athens, GA, United States
 
Air-Sea Exchange of Inorganic Mercury and Dimethylmercury in the Amundsen Sea During the U.S. GEOTRACES GP17-ANT Cruise (1986678)
Yipeng He, Woods Hole Oceanographic Institution, Woods Hole, MA, United States, Marissa Despins, University of California Santa Cruz, Santa Cruz, United States, Carl H Lamborg, University of California Santa Cruz, Santa Cruz, CA, United States and Robert P Mason, University of Connecticut, Marine Sciences, Groton, United States
 
Atmospheric Precipitation Estimates in the Amundsen Sea from Tritium (1996497)
Mollie Passacantando, Newport, RI, UNITED STATES, Alan Seltzer, Woods Hole Oceanographic Institution, Woods Hole, United States, William J Jenkins, WHOI, Woods Hole, MA, United States and Brice Loose, University of Rhode Island, Narragansett, RI, United States
 
Tracing ‘Net’ Elemental Fluxes Using Element-Meteoric Water Relationships in the West Antarctic Peninsula (1996624)
Teagan Bellitto1, Robert M Sherrell2, Michael Paul Meredith3, Amber Luella Annett4, Jessica N Fitzsimmons1 and Palmer LTER Team, (1)Texas A&M University College Station, Oceanography, College Station, United States, (2)Rutgers University, Departments of Marine and Coastal Sciences and Earth and Planetary Sciences, New Brunswick, United States, (3)NERC British Antarctic Survey, Cambridge, United Kingdom, (4)University of Southampton, Ocean and Earth Science, Southampton, United Kingdom
 
Increasing Antarctic meltwater hastens Southern Ocean change by decades in 21st-century projections (1997585)
Matthew J Hoffman1, Irena Vankova2, Darin Scott Comeau3, Stephen F Price2, Xylar Asay-Davis2, Carolyn Branecky Begeman4 and Jonathan D Wolfe3, (1)Los Alamos National Laboratory, Fluid Dynamics and Solid Mechanics, Los Alamos, NM, United States, (2)Los Alamos National Laboratory, Fluid Dynamics and Solid Mechanics, Los Alamos, United States, (3)Los Alamos National Laboratory, Los Alamos, United States, (4)University of California Santa Cruz, Earth and Planetary Sciences Department, Santa Cruz, United States
 
Dissolved Trace Metal Distributions and Soluble/Colloidal Partitioning in the Amundsen Sea, West Antarctica: Results from the U.S. GEOTRACES GP17-ANT Expedition (2000293)
Jessica N Fitzsimmons, Texas A&M University, Department of Oceanography, United States, Teagan Bellitto, Texas A&M University College Station, Oceanography, College Station, United States, Tim Conway, University of South Florida, College of Marine Science, St. Petersburg, United States and Seth John, University of Southern California, Department of Earth Sciences, Los Angeles, United States
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