PP009
Emerging Proxy and Modeling Evidence for Indian and Southern Ocean Circulation and Climate Variability through the Neogene

Session ID#: 160404

Session Description:
The dynamics of the Southern Ocean is crucial for setting climate variability today and in the past. The role of the Indian Ocean has at times been overlooked, but new work focusing on this region has highlighted its importance in global ocean circulation, as well as regional and global climate. In this session, we seek to bring together researchers working on a wide range of temporal (sub-millennial to tectonic) and spatial (local to basin to circumpolar) scales, with a variety of methods, and a particular focus on the Indian and Southern Oceans. We welcome studies further extending established and novel proxy records of past environmental conditions, including surface and deep ocean circulation, the coupled ocean and atmosphere system, as well as paleoclimate modeling strategies in order to share progress in our understanding of the causes and consequences of climate change throughout the Neogene.
Index Terms:

1616 Climate variability [GLOBAL CHANGE]
1622 Earth system modeling [GLOBAL CHANGE]
4924 Geochemical tracers [PALEOCEANOGRAPHY]
4962 Thermohaline [PALEOCEANOGRAPHY]

Primary Convener:  Sophia Hines, Woods Hole Oceanographic Institution, Marine Chemistry and Geochemistry, Woods Hole, MA, United States
Conveners:  Aidan Starr, Rutgers University New Brunswick, Department of Marine and Coastal Sciences, New Brunswick, NJ, United States, Sidney R Hemming, Lamont-Doherty Earth Observatory, Palisades, United States and Ian R Hall, Cardiff University, School of Earth and Environmental Sciences, Cardiff, United Kingdom
Student/Early Career Convener:  Aidan Starr, Rutgers University New Brunswick, Department of Marine and Coastal Sciences, New Brunswick, NJ, United States
 
Investigating the influence of sea surface temperatures on southeastern African hydroclimate during the Mid-Pleistocene Transition (1049174)
Kayla Hollister and Melissa A Berke, University of Notre Dame, Notre Dame, United States
 
The Antarctic Circumpolar Current in the glacial Indian Ocean: A multi-site paleoceanographic reconstruction (1085943)
Aidan Starr, Rutgers University New Brunswick, New Brunswick, NJ, United States, Elisabeth L Sikes, Rutgers University, Piscataway, United States and Ian R Hall, Cardiff University, School of Earth and Environmental Sciences, Cardiff, United Kingdom
 
The role of the subantarctic in carbon escape from the northern lip of the Southern Ocean during the last deglaciation (Invited) (1088169)
Natalie Umling1,2, Elisabeth L Sikes3, Patrick A Rafter4 and Nathalie Goodkin1, (1)American Museum of Natural History, New York, United States, (2)Rutgers University, New Brunswick, United States, (3)Rutgers University, Piscataway, United States, (4)University of California, Irvine, Earth System Science, Irvine, United States
 
Grain Size Variation of Detrital Particles in the Conrad Rise of the Southern Ocean during the last 43,000 years (1098540)
JuYeon Yang1, Minoru Ikehara2, Hyuk Choi1 and Boo-Keun Khim1, (1)Pusan National University, Department of Oceanography, Busan, South Korea, (2)Kochi University, Center of Advanced Marine Core Research, Kochi, Japan
 
History of the Southern Benguela Upwelling System since ~3.6 Ma: Evidence from Planktic Foraminiferal Assemblage (1102657)
Rudra Narayan Mohanty, Anil K Gupta and Rina Palei, Indian Institute of Technology Kharagpur, Geology and Geophysics, Kharagpur, India
 
Evolution of δ13C of Surface Water Masses in the Southeastern Indian Ocean Over the Last 50,000 Year (1109571)
Elisabeth L Sikes1, Natalie Elizabeth Umling1, Ryan Glaubke1, Aidan Starr2 and Ellen E Martin3, (1)Rutgers University New Brunswick, Department of Marine and Coastal Sciences, New Brunswick, United States, (2)Rutgers University New Brunswick, Department of Marine and Coastal Sciences, New Brunswick, NJ, United States, (3)University of Florida, Geological Sciences, Gainesville, United States
 
Examining the Effects of Grain Size and Marine Barite on Sr Isotopes in Terrigenous Sediment from U1479, Cape Basin, South Africa (1114727)
Amelia Faucher, Vassar College, Poughkeepsie, NY, United States, Allison M Franzese, Lamont-Doherty Earth Observatory of Columbia University, Palisades, United States; Hostos Community College, Department of Natural Sciences, New York, United States and Sidney R Hemming, Lamont-Doherty Earth Observatory, Palisades, United States
 
Observing monsoonal intensities from the Maldives across the last two Glacial Terminations (1120514)
Siyao Mark Yu1, James Wright2, Richard A Mortlock3, Ronan Keating1, James V Browning4 and Kenneth Miller4, (1)Rutgers University, Department of Earth and Planetary Sciences, New Brunswick, United States, (2)Rutgers University, Earth and Planetary Sciences, Piscataway, United States, (3)Rutgers University, Department of Earth and Planetary Sciences, Piscataway, NJ, United States, (4)Rutgers University, Department of Earth and Planetary Sciences, Piscataway, United States
 
Foraminifera-bound Nitrogen Isotope Values from the Agulhas Plateau Respond to Southern Westerly Wind Migrations across the Last Glacial Period (1120768)
Basia Marcks1, Shalan Mcdonagh1, Rebecca S Robinson1 and Roger Patrick Kelly2, (1)University of Rhode Island, Graduate School of Oceanography, Narragansett, United States, (2)University of Rhode Island, Graduate School of Oceanography, Narragansett, RI, United States
 
Long Eccentricity Cycles and the Ocean Chemocline Over the Past 1.5 Million Years (1141421)
Ian R Hall1, Aidan Starr2, Stephen Barker1, Xu Zhang3, Deborah Niegas Tangunan4, Christopher D Charles5, Alexandra Nederbragdt1 and Sidney R Hemming6, (1)Cardiff University, School of Earth and Environmental Sciences, Cardiff, United Kingdom, (2)Rutgers University New Brunswick, Department of Marine and Coastal Sciences, New Brunswick, NJ, United States, (3)ITP Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China, (4)University of Bremen, Department of Geosciences, Bremen, Germany, (5)Scripps Institution of Oceanography, La Jolla, CA, United States, (6)Lamont-Doherty Earth Observatory, Palisades, United States
 
Climate and carbon cycling in the southwestern Indian Ocean during the Mid-Pliocene Warm Period (1143822)
Deborah Niegas Tangunan1, Ian R Hall1, Luc Beaufort2, Paul Richard Halloran3, Aidan Starr1,4 and Alexandra Nederbragdt1, (1)Cardiff University, School of Earth and Environmental Sciences, Cardiff, United Kingdom, (2)Aix Marseille Univ, CNRS, IRD, INRA, Coll France, CEREGE, Aix-en-Provence, France, (3)University of Exeter, Exeter, EX4, United Kingdom, (4)Rutgers University New Brunswick, Department of Marine and Coastal Sciences, New Brunswick, NJ, United States
 
Paleo Thermocline Ventilation and Upper Ocean Water Mass Evolution of the Equatorial Indian Ocean during the Last 44ka (1145480)
Sanjit Kumar Jena1, Ravi Bhushan2, Nisha Bharti1 and Partha Sarathi Sarathi Jena1, (1)Physical Research Laboratory, Geosciences, Ahmedabad, India, (2)Physical Research Laboratory, Geosciences Division, Ahmedabad, India
 
The (Salty) Blob: The Deep Indian Ocean as a Potential Salt Source to the Atlantic during the Last Deglaciation (1150831)
Ryan Glaubke1, Elisabeth L Sikes2, Natalie Elizabeth Umling1, Aidan Starr3, Sindia M Sosdian4, Cassandre Rose Rose Stirpe5, Katherine A Allen6 and Matthew W Schmidt7, (1)Rutgers University New Brunswick, Department of Marine and Coastal Sciences, New Brunswick, United States, (2)Rutgers University, Piscataway, United States, (3)Rutgers University New Brunswick, Department of Marine and Coastal Sciences, New Brunswick, NJ, United States, (4)Cardiff University, School of Earth & Ocean Sciences, Cardiff, United Kingdom, (5)University of Maine, Orono, United States, (6)University of Maine, Earth & Climate Sciences, Orono, ME, United States, (7)Old Dominion University, Ocean, Earth & Atmospheric Sciences, Norfolk, VA, United States
 
Geochemistry of Clay vs. Silt Sized Marine Sediment in the Agulhas Current Region (1155102)
Altagracia De La Rosa, New York, NY, UNITED STATES, Allison M Franzese, Columbia University of New York, Palisades, NY, United States and Sidney R Hemming, Lamont-Doherty Earth Observatory, Palisades, United States
 
Constraining Surface Reservoir Ages in the Southern Ocean Over the Past 30,000 Years Using Foram and Coral-Based Records (1164735)
Sophia Hines, Woods Hole Oceanographic Institution, Marine Chemistry and Geochemistry, Woods Hole, MA, United States, Noreen Garcia, Scripps Institution of Oceanography, La Jolla, United States, John Richard Southon, Univ California, Earth System Science, Irvine, United States, Sidney R Hemming, Lamont-Doherty Earth Observatory, Palisades, United States and Christopher D Charles, Scripps Institution of Oceanography, La Jolla, CA, United States
 
Terrigenous Provenance Evidence for Sediment Transport by the Agulhas Current Through the Mid-Pleistocene Transition (1171257)
Allison M Franzese1, Sidney R Hemming2, Sophia Hines3, Christopher D Charles4, Ian R Hall5 and Steven L Goldstein2, (1)Hostos Community College, Department of Natural Sciences, New York, United States, (2)Lamont-Doherty Earth Observatory, Palisades, United States, (3)Woods Hole Oceanographic Institution, Marine Chemistry and Geochemistry, Woods Hole, MA, United States, (4)Scripps Institution of Oceanography, La Jolla, CA, United States, (5)Cardiff University, School of Earth and Environmental Sciences, Cardiff, United Kingdom
 
Changing Southern Ocean Oxygenation at Intermediate Water Depths during the Transition Eocene-Oligocene Ice Sheet Development: Bulk Sediment Elemental data from IODP Site U1553, New Zealand. (1174178)
Matthieu Chicoye, University of Michigan Ann Arbor, Ann Arbor, MI, United States, Ingrid L Hendy, University of Michigan Ann Arbor, Earth and Environmental Sciences, Ann Arbor, MI, United States, Ann Dunlea, Woods Hole Oceanographic Institution, Woods Hole, United States, Erika Tanaka, Research Institute for Marine Geodynamics, Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan and Kazutaka Yasukawa, Frontier Research Center for Energy and Resources, The University of Tokyo, Tokyo, Japan
 
UPDATE ON BENTHIC ISOTOPE STRATIGRAPHY FOR SITE U1472, NATAL VALLEY, SOUTHEASTERN AFRICA (1177023)
Sidney R Hemming1, Ian R Hall2, Alexandra Nederbragdt2, Chiza N Mwinde3, Ashley Nicole Braunthal4, Jingzhi (Amanda) Liang5, Silu Wang6, Mireya Estrada7, Daniel P Babin8, Margit H Simon9, Allison M Franzese10,11, Steven L Goldstein12, Expedition 361 Scientists13 and IODP Exp 361, (1)Lamont-Doherty Earth Observatory of Columbia University, Palisades, United States, (2)Cardiff University, School of Earth and Environmental Sciences, Cardiff, United Kingdom, (3)University of Chicago, Department of Geophysical Sciences, Chicago, United States, (4)Autonomous University of Barcelona (UAB), Department of Geography, Barcelona, Spain, (5)University of Toronto, Department of Civil and Mineral Engineering, Toronto, ON, Canada, (6)Barnard College, New York, United States, (7)Barnard College, Environmental Sciences, New York, NY, United States, (8)Lamont -Doherty Earth Observatory, Palisades, United States, (9)NORCE & Bjerknes Centre for Climate Research, Bergen, Norway, (10)CUNY Hostos Community College, Natural Sciences, Bronx, NY, United States, (11)Organization Not Listed, Washington, United States, (12)Lamont-Doherty Earth Observatory, Palisades, United States, (13)Texas A&M University, International Ocean Discovery Program, College Station, United States
 
Neogene History of Southern Ocean Deep Water Inferred from a Deep Argentine Margin Sediment Drift (1179355)
James D Wright, Rutgers University New Brunswick, Earth and Planetary Sciences, New Brunswick, NJ, United States, Niall C. Slowey, Texas A&M University, Oceanography, College Station, United States and Aaron J Watters, Rutgers University New Brunswick, Earth and Planetary Sciences, New Brunswick, United States
 
Consistent past and future changes in Indian Ocean climate driven by coupled ocean-atmosphere dynamics (Invited) (1187999)
Pedro DiNezio, University of Colorado at Boulder, Department of Atmospheric and Oceanic Sciences, Boulder, United States
 
The Sources of Terrigenous Sediment to the Southeast Atlantic-Southern Ocean Over the Last ~150,000 Years (1190601)
Anne Barkley1, Gisela Winckler2, Cristina Recasens3, Michael R Kaplan4, Robert F Anderson5, Yue Cai4, Louise Bolge6, Jennifer L Middleton7, Jack Longman8 and Steven L Goldstein4, (1)Lamont -Doherty Earth Observatory, New York, NY, United States, (2)Columbia University, Department of Earth and Environmental Sciences, New York, NY, United States, (3)Columbia University, Palisades, NY, United States, (4)Lamont-Doherty Earth Observatory, Palisades, United States, (5)Lamont-Doherty Earth Obs, Palisades, NY, United States, (6)Columbia University of New York, Palisades, NY, United States, (7)Harvard University, Earth and Planetary Sciences, Cambridge, MA, United States, (8)University of Oldenburg, ICBM, Oldenburg, Germany
 
Dramatic Changes in the Deepwater Circulation of the Southern Ocean since late Miocene (1200882)
Lathika N1, Waliur Rahaman2, Sidney R Hemming3, Ian R Hall4, Steven L Goldstein3, Thamban Meloth5, Aidan Starr6, Sophia Hines7, Amala Paul8, Christopher D Charles9, Jason Coenen10, Priyesh Prabhat2, Jens Gruetzner11, Francisco J Jimenez12, Leah LeVay13, Mohd Tarique14 and Expedition 361 Scientists15, (1)National Centre for Polar and Ocean Research, Ministry of Earth Sciences, Vasco da Gama, India, (2)National Centre for Polar and Ocean Research, Goa, India, (3)Lamont-Doherty Earth Observatory, Palisades, United States, (4)Cardiff University, School of Earth and Environmental Sciences, Cardiff, United Kingdom, (5)National Center for Polar and Ocean Research, Polar Sciences, Vasco-da-Gama, India, (6)Rutgers University New Brunswick, Department of Marine and Coastal Sciences, New Brunswick, NJ, United States, (7)Woods Hole Oceanographic Institution, Marine Chemistry and Geochemistry, Woods Hole, MA, United States, (8)National Center for Polar and Ocean Research, Vasco Da Gama, India, (9)Scripps Institution of Oceanography, La Jolla, CA, United States, (10)Department of Geology, Northern Illinois University, Sycamore, United States, (11)Alfred-Wegener-Institut, Bremerhaven, Germany, (12)University of Granada, Granada, Spain, (13)Texas A&M University, International Ocean Discovery Program, College Station, TX, United States, (14)National Centre for Polar and Ocean Research, Ministry of Earth Sciences, Goa, India, (15)Texas A&M University, International Ocean Discovery Program, College Station, United States
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