PP026
The Ross Sea: Past, Present and Future

Session ID#: 158429

Session Description:
The Ross Sea, bounded by the East and West Antarctic Ice Sheets and the Southern Ocean, plays an important role in the global climate system, impacting ice sheet dynamics, large-scale ocean circulation and the Southern Ocean biosphere. Active topics of research in this region range over a variety of timescales and include understanding the role of the Ross Sea during the onset of Southern Hemisphere glaciation, how past and present primary productivity influence the global carbon cycle, the use of this unique environment as an analogue for extraterrestrial ocean worlds and determining how its physical, chemical and biological oceanography will be altered due to climate change. In this session, we invite work from the Ross Sea region and adjacent geographical locations including geological records of its past climate and ecosystem change, studies of its modern environmental conditions and projections of changes to regional ice sheet dynamics and ocean circulation. 
Index Terms:

0456 Life in extreme environments [BIOGEOSCIENCES]
0726 Ice sheets [CRYOSPHERE]
4845 Nutrients and nutrient cycling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4912 Biogeochemical cycles, processes, and modeling [PALEOCEANOGRAPHY]


Primary Convener:  Jeanine L Ash, Rice University, Earth, Environmental and Planetary Sciences, Houston, TX, United States
Conveners:  Molly O'Rourke Patterson, Binghamton University, Department of Geological Sciences, Binghamton, NY, United States, Denise K Kulhanek, Christian-Albrechts University of Kiel, Kiel, Germany and Brian Romans, Virginia Tech, Geosciences, Blacksburg, United States
 
Constraints on the Timing and Extent of Deglacial Grounding Line Retreat in West Antarctica from Subglacial Sediments (Invited) (1045231)
Ryan Venturelli1, Brenna Boehman2, Christina Davis3, Jon Hawkings4, Sarah Ellen Johnston5, Chloe Gustafson6, Alexander B Michaud7, Cyrille Mosbeux8, Matthew Siegfried9, Trista Vick-Majors10, Valier Galy11, Robert G Spencer12, Sophie Warny13, Brent Christner14, John E Dore15, Helen Amanda Fricker6, David M Harwood16, Amy Leventer17, John C Priscu18, Mark L Skidmore19, Brad E Rosenheim20 and SALSA Science Team, (1)Colorado School of Mines, Golden, United States, (2)Woods Hole Oceanographic Institution, Woods Hole, MA, United States, (3)University of Florida, Microbiology and Cell Science, Ft Walton Beach, FL, United States, (4)Florida State University, Earth, Ocean and Atmospheric Science, Tallahassee, FL, United States, (5)University of Lethbridge, Lethbridge, AB, Canada, (6)University of California, San Diego, Scripps Institution of Oceanography, La Jolla, CA, United States, (7)Montana State University, Bozeman, United States, (8)LGGE Laboratoire de Glaciologie et Géophysique de l’Environnement, Saint Martin d'Hères, France, (9)Colorado School of Mines, Department of Geophysics, Hydrologic Science & Engineering Program, Golden, CO, United States, (10)Michigan Technological University, Biological Sciences, Houghton, MI, United States, (11)WHOI-MCG, Woods Hole, MA, United States, (12)Florida State University, Tallahassee, United States, (13)Louisiana State University, Geology & Geophysics, and Museum of Natural Science, Baton Rouge, LA, United States, (14)University of Florida, Microbiology and Cell Science, Gainesville, FL, United States, (15)Montana State University, Department of Land Resources and Environmental Sciences, Bozeman, MT, United States, (16)University of Nebraska Lincoln, Department of Earth and Atmospheric Sciences, Lincoln, NE, United States, (17)Colgate University, Hamilton, NY, United States, (18)Montana State University, Department of Land Resources and Environmental Science, Bozeman, MT, United States, (19)Montana State University, Department of Earth Sciences, Bozeman, MT, United States, (20)University of South Florida St. Petersburg, College of Marine Science, St Petersburg, FL, United States
 
A Synthesis: Heat Sources and Flux Distributions in the Western Ross Sea Seafloor, Antarctica - Links between Rifting, Volcanism and Ice Sheets (1055922)
Kurt S Panter, Bowling Green State University, Bowling Green, OH, United States and Masako Tominaga, Woods Hole Oceanographic Institution, Woods Hole, MA, United States
 
The early retreat of the Western Antarctic Ice Sheet documented by ultra-high-resolution Holocene paleoclimate record from the Edisto Inlet Fjord (northern Victoria Land, Antarctica). (1061600)
Francesca Battaglia1, Luca Baradello2, Laura De Santis2, Ester Colizza3, Vedrana Kovacevic2, Laura Ursella2, Florence Colleoni2, Daniela Accetella2, Michele Rebesco4, Danilo Morelli5 and Manuel Bensi2, (1)Ca' Foscari University, Venice, Italy, (2)National Institute of Oceanography and Applied Geophysics OGS, Trieste, Italy, (3)Dip. di Matematica e Geoscienze, Universita' degli Studi di Trieste, Trieste, Italy, (4)OGS, National Institute of Oceanography and Applied Geophysics, Department of Geophysics, Trieste, Italy, (5)University of Genova, Genova, Italy
 
Antarctic Ice Sheet growth during the Miocene Climatic Optimum (1069998)
Imogen Mireille Browne, University of South Florida St. Petersburg, College of Marine Science, St Petersburg, FL, United States, Amelia Shevenell, University of South Florida, College of Marine Science, Tampa, FL, United States, R Mark Leckie, Univ Massachusetts, Amherst, MA, United States, Justin P Dodd, Northern Illinois University, Geology and Environmental Geosciences, DeKalb, IL, United States, Maria-Eleni Christopoulou, Northern Illinois University, Geology and Environmental Sciences, DeKalb, United States, Francesca Sangiorgi, Utrecht University, Department of Earth Sciences, Utrecht, Netherlands, Evi Wubben, Utrecht University, Utrecht, Netherlands, Joe Prebble, GNS Science, Wellington, New Zealand, Jeanine Ash, Rice University, Houston, United States, Tim Eelco van Peer, University College of London, Earth Sciences, London, United Kingdom, David M Harwood, University of Nebraska Lincoln, Department of Earth and Atmospheric Sciences, Lincoln, NE, United States, Richard H Levy, GNS Science, Lower Hutt, New Zealand, Robert M Mckay, Victoria University of Wgtn, Wellington, New Zealand, Laura De Santis, National Institute of Oceanography and Applied Geophysics OGS, Trieste, Italy, Denise K Kulhanek, Christian-Albrechts University of Kiel, Kiel, Germany and IODP Expedition 374 Scientists
 
Transient simulations of Pliocene ice sheet dynamics in the Ross Sea (Invited) (1114414)
Anna Ruth W Halberstadt, Berkeley Geochronology Center, Berkeley, United States, Edward Gasson, University of Exeter, Exeter, EX4, United Kingdom, David Pollard, Pennsylvania State University, Earth and Environmental Systems Institute, University Park, PA, United States and Robert M Deconto, Univ Massachusetts, Amherst, MA, United States
 
Effects Of Sea Ice Concentration And Dissolved Iron Variability On Phytoplankton Dynamics Of The Ross Sea Using A 1-D Model. (1136023)
Angela Bahamondes Dominguez1, Helen Macdonald1 and Graham Rickard2, (1)National Institute of Water and Atmospheric Research, Wellington, New Zealand, (2)National Institute of Water and Atmospheric Research (NIWA), Wellington, New Zealand
 
Modern Freshening of Ross Sea Surface Waters Outside the Range of Natural Variability Over the Last 5,500 Years (1144618)
Olivia Truax1, Christina R Riesselman1, Aldo Shemesh2, Ruth Yam2, Rebecca L Parker3, Jae Il Lee4, Heung Soo Moon4, Kyu-Cheul Yoo4, Min Kyung Lee5, Craig Stevens6 and Gary S Wilson7, (1)University of Otago, Departments of Geology and Marine Science, Dunedin, New Zealand, (2)Weizmann Institute of Science, Rehovot, Israel, (3)University of Exeter, Exeter, United Kingdom, (4)Korea Polar Research Institute, Incheon, South Korea, (5)Korea Polar Research Institute, Incheon, Korea, Republic of (South), (6)National Institute of Water and Atmospheric Research, Wellington, New Zealand, (7)University of Otago, Dunedin, New Zealand
 
The astronomical evolution of Antarctica's ice sheets (1151750)
Nicholas Benetti Sullivan1, Stephen Richard Meyers2, Richard H Levy3, Robert M Mckay4, Tina van de Flierdt5, James Marschalek6, Matteo Perotti7, Luca Zurli7, Franco M Talarico7, David M Harwood8, Laura De Santis9, Fabio Florindo10, Tim Naish11, Georgia R. Grant3 and Molly Patterson12, (1)University of Wisconsin Madison, Madison, WI, United States, (2)Univ. of Wisconsin - Madison, Geoscience, Madison, WI, United States, (3)GNS Science, Lower Hutt, New Zealand, (4)Victoria University of Wgtn, Wellington, New Zealand, (5)Imperial College London, London, SW7, United Kingdom, (6)Imperial College London, London, United Kingdom, (7)University of Siena, Department of Physical Sciences, Earth and Environment, Siena, Italy, (8)University of Nebraska Lincoln, Department of Earth and Atmospheric Sciences, Lincoln, NE, United States, (9)National Institute of Oceanography and Applied Geophysics OGS, Trieste, Italy, (10)INGV-ROME, Rome, Italy, (11)Victoria University of Wellington, Wellington, New Zealand, (12)Binghamton University, Department of Geological Sciences, Binghamton, United States
 
Subseafloor Microbial Diversity of the Ross Sea, Antarctica (IODP 374), is Linked to Differences in Depositional Regimes (1153503)
Jennifer Biddle1, Alessia Bastianoni2, Matteo Selci2, Giacomo Fabozzi2, Jeanine Ash3, Martina Cascone2, Donato Giovannelli4, Angelina Cordone2 and Scientific Team of IODP Drilling Expedition 374, (1)University of Delaware, Newark, DE, United States, (2)The University of Naples Federico II, Naples, Italy, (3)Rice University, Houston, United States, (4)Rutgers University New Brunswick, New Brunswick, NJ, United States
 
Pleistocene Foraminifera of the Ross Sea Continental Slope and Rise, IODP Exp. 374 (1155211)
Samantha McComb, University of Massachusetts Amherst, Amherst, MA, United States, R Mark Leckie, Univ Massachusetts, Amherst, MA, United States and IODP Expedition 374 Science Party
 
Warm Water Incursions and Water Mass Changes on the Ross Sea Shelf (Antarctica) During the Plio-Pleistocene Based on Foraminifera from IODP Exp 374 (1160986)
R Mark Leckie, University of Massachusetts Amherst, Department of Geosciences, Amherst, United States, Julia Seidenstein, USGS Florence Bascom Geoscience Center, Reston, United States, David M Harwood, University of Nebraska Lincoln, Department of Earth and Atmospheric Sciences, Lincoln, NE, United States and IODP Exp. 374 Shipboard Scientists
 
Antarctic Bottom Water (AABW) Formation History in the Ross Sea: Insights from the Pliocene-Pleistocene record at IODP Site U1524 (1162504)
Natalia Varela, Virginia Tech, Geosciences, Blacksburg, VA, United States, Brian Romans, Virginia Tech, Geosciences, Blacksburg, United States, Zoltan Sylvester, University of Texas at Austin, Bureau of Economic Geology, Austin, United States, Molly Patterson, Binghamton University, Department of Geological Sciences, Binghamton, United States, Jeanine Ash, Rice University, Houston, United States, Denise K Kulhanek, Christian-Albrechts University of Kiel, Kiel, Germany, Laura De Santis, Ist Nazionale Oceanografia, Sgonico, Italy and Robert M Mckay, Victoria University of Wgtn, Wellington, New Zealand
 
The Rise and Fall of the Late Neogene West Antarctic Ice Sheet in the Central Ross Sea Using a Multianalytical Provenance Approach (1172708)
Kathy Licht1, Chris Mallery2, James Marschalek3, Matteo Perotti4, Luca Zurli4, Stuart N Thomson5, Tina van de Flierdt6 and IODP Expedition 374 Scientists7, (1)Indiana University Purdue University Indianapolis, Indianapolis, United States, (2)Indiana University Purdue University Indianapolis, Indianapolis, IN, United States, (3)Imperial College London, London, United Kingdom, (4)University of Siena, Department of Physical Sciences, Earth and Environment, Siena, Italy, (5)Department of Geosciences, University of Arizona, Tucson, AZ, United States, (6)Imperial College London, London, SW7, United Kingdom, (7)Integrated Ocean Drilling Program, College Station, TX, United States
 
Evidence for Sub-Ice Sheet ‘Floods’ and Miocene Diatomite from beneath the Kamb Ice Stream, West Antarctica (1175739)
David M Harwood1, Linda Balfoort2, Gavin B Dunbar2, Sebastian Naeher3 and Huw Joseph Horgan2, (1)University of Nebraska Lincoln, Department of Earth and Atmospheric Sciences, Lincoln, NE, United States, (2)Victoria University of Wellington, Antarctic Research Centre, Wellington, New Zealand, (3)GNS Science, Lower Hutt, New Zealand
 
Sensitivity of the West Antarctic Ice Sheet to +2°C (SWAIS 2C) (1183698)
Richard H Levy1, Molly Patterson2, Tina van de Flierdt3, Huw Joseph Horgan4, Denise K Kulhanek5, Gavin B Dunbar4 and SWAIS 2C Team, (1)GNS Science, Lower Hutt, New Zealand, (2)Binghamton University, Department of Geological Sciences, Binghamton, United States, (3)Imperial College London, London, SW7, United Kingdom, (4)Victoria University of Wellington, Antarctic Research Centre, Wellington, New Zealand, (5)T, International Ocean Discovery Program, College Station, United States