PP029
Biological and Physical Processes in High-Latitude Environments: Impacts on the Global Carbon Cycle and Climate System Through Time II Posters

Friday, 11 December 2020: 04:00-20:59
Poster
Primary Convener:  Jennifer L Middleton, Lamont Doherty Earth Observatory, Palisades, NY, United States
Conveners:  Chandranath Basak, University of Delaware, Newark, DE, United States, Julia Gottschalk, Lamont-Doherty Earth Observatory, Columbia University of the City of New York, Palisades, United States and Christopher M Moy, University of Otago, Dunedin, New Zealand
Primary Liaison:  Jennifer L Middleton, Harvard University, Earth and Planetary Sciences, Cambridge, MA, United States
Chairs:  Jennifer L Middleton, Harvard University, Earth and Planetary Sciences, Cambridge, MA, United States and Chandranath Basak, Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY, United States
OSPA Liaison:  Jennifer L Middleton, Harvard University, Earth and Planetary Sciences, Cambridge, MA, United States
 
Carbon isotopes record lake water anoxia and methanogenesis under warm and cold climate conditions at Lake El’gygytgyn, Far East Russia (693867)
Helen Habicht1,2, Stephen J Burns3, Isla S. Castañeda4, William Daniels1 and Julie Brigham-Grette5, (1)University of Massachusetts Amherst, Department of Geosciences, Amherst, MA, United States, (2)Lamont-Doherty Earth Observatory, Palisades, NY, United States, (3)University of Massachusetts, Amherst, MA, United States, (4)University of Massachusetts Amherst, Geosciences, Amherst, MA, United States, (5)Univ Massachusetts, Amherst, MA, United States
 
Deglacial CO2 release and ventilation in the Indian Ocean sector attributed to a Southern Ocean deep gateway effect (741124)
Elisabeth L Sikes, Rutgers University New Brunswick, New Brunswick, NJ, United States, Thomas Williams, University of Florida, Ft Walton Beach, United States, Aidan Starr, Cardiff University, School of Earth and Ocean Sciences, Cardiff, CF24, United Kingdom and Ellen E Martin, University of Florida, Geological Sciences, Ft Walton Beach, FL, United States
 
Estimating Southern Ocean sea ice extent: A new method based on the oxygen isotopic signature of foraminifera (678683)
David C Lund, University of CT at Avery Point, Groton, CT, United States, Zanna Chase, University of Tasmania, Institute for Marine and Antarctic Studies, Hobart, TAS, Australia and Karen Elizabeth Kohfeld, Simon Fraser University, School of Resource and Environmental Management and School of Environmental Science, Burnaby, BC, Canada
 
Foraminifera-bound Nitrogen Isotopes Reveal Northward Migrations of the Subtropical Frontal Zone During the Mid-Pleistocene Transition (728551)
Basia Marcks1, Rebecca S Robinson1, Alejandra Cartagena Sierra2, Melissa A Berke2, Douglas Villela De Oliveira Lessa3 and Thiago pereira Dos santos4, (1)University of Rhode Island, Narragansett, RI, United States, (2)University of Notre Dame, Notre Dame, IN, United States, (3)UFF Federal Fluminense University, Niteroi, Brazil, (4)UFF Federal Fluminese University, Niteroi, Brazil
 
High-Resolution Biomarker Proxy Records of Arctic Climate Change During the Mid-Pleistocene Transition from Lake El’gygytgyn (Far East Russia) (674396)
Kurt Lindberg1,2, Isla S. Castañeda1, William Daniels1, Jeff M Salacup1 and Julie Brigham-Grette1, (1)University of Massachusetts Amherst, Department of Geosciences, Amherst, MA, United States, (2)now at University at Buffalo, Department of Geology, Buffalo, MA, United States
 
Investigating feedback mechanisms between ice rafted debris production and carbon export in the Pacific Sector of the Southern Ocean over the last 35,000 years (733900)
Kelly-Marie Powell, Columbia University, Chemistry, New York, NY, United States; Columbia University of New York, Chemistry, Palisades, NY, United States, Jennifer L Middleton, Lamont Doherty Earth Observatory, Palisades, NY, United States, Sidney R Hemming, Lamont-Doherty Earth Observatory, Palisades, NY, United States, Gisela Winckler, Columbia University, Department of Earth and Environmental Sciences, New York, NY, United States, Frank J Pavia, California Institute of Technology, Pasadena, CA, United States and Robert F Anderson, Lamont-Doherty Earth Obs, Palisades, NY, United States
 
Orbitally-resolved Pliocene environmental variability at North Pacific ODP 883 (767202)
Joseph Novak, University of California Santa Cruz, Santa Cruz, CA, United States, Rocio P Caballero-Gill, George Mason University, Fairfax, VA, United States, Timothy Herbert, Brown University, Department of Earth, Environmental, and Planetary Sciences, Providence, RI, United States and Harry J Dowsett, U.S. Geological Survey, Florence Bascom Geoscience Center, Reston, VA, United States
 
Oxidation of sedimentary sulfides as negative feedback to ice-sheet expansion: A case study from the Eocene-Oligocene Antarctic glaciation (738044)
Weiqi Yao1, Stefan Markovic2, Adina Paytan3 and Ulrich Wortmann1, (1)University of Toronto, Department of Earth Sciences, Toronto, ON, Canada, (2)University of Toronto Scarborough, Department of Physical and Environmental Sciences, Toronto, ON, Canada, (3)UCSC-Inst Marine Sciences, Santa Cruz, CA, United States
 
Paleo-biogeochemistry of the Central Himalayan region during late MIS 3 using stable isotopic composition of organic matter occluded in diatoms and lake sediments (676549)
Abdur Rahman1, Siddhartha Sarkar2 and Sanjeev Kumar2, (1)Physical Research Laboratory, Geosciences, Ahmedabad, India, (2)Physical Research Laboratory, Geosciences Division, Ahmedabad, India
 
Quantifying LGM carbon drawdown due to changes in the biological pump efficiency through the reconstruction of deep-water oxygen, preformed phosphate, and preformed δ13C (765284)
Tyler Vollmer, Georgia Institute of Technology Main Campus, Ocean Science and Engineering, Atlanta, GA, United States, Jean Lynch-Stieglitz, Georgia Tech, Atlanta, GA, United States and Takamitsu Ito, Georgia Institute of Technology, Atlanta, GA, United States
 
Sea Ice Changes in the Southwest Pacific Sector of the Southern Ocean During the Last 140,000 Years (765393)
Jacob Jones1, Karen Elizabeth Kohfeld2, Helen Bostock3, Xavier Crosta4, Melanie Liston5, Gavin B Dunbar5, Zanna Chase6 and Amy Leventer7, (1)Simon Fraser University, School of Resource and Environmental Management, Burnaby, BC, Canada, (2)Simon Fraser University, School of Resource and Environmental Management and School of Environmental Science, Burnaby, BC, Canada, (3)University of Queensland, School of Earth and Environmental Sciences, Brisbane, Australia, (4)Université de Bordeaux, Environnements et Paléoenvironnements Océaniques et Continentaux, Bordeaux, France, (5)Victoria University of Wellington, Antarctic Research Centre, Wellington, New Zealand, (6)University of Tasmania, Institute for Marine and Antarctic Studies, Hobart, TAS, Australia, (7)Colgate University, Geology, Hamilton, NY, United States
 
The relationship between oxygenation, productivity and circulation in the Bering Sea during late Pleistocene glacial-interglacial cycles (761285)
Jared Bathen, Williams College, Williamstown, MA, United States and Mea S Cook, Williams College, Geosciences, Williamstown, MA, United States
 
Three Centuries of Southwest Pacific Gyre Biogeochemistry Reconstructed from a New Zealand Black Coral (723707)
Ashley Davis1,2, Nicholas T Hitt1,2, Daniel Sinclair1, Di M Tracey2, Stewart Fallon3, Erik Behrens2, Aimee K Komugabe-Dixson4 and John Charles Hellstrom5, (1)Victoria University of Wellington, School of Geography, Environment and Earth Sciences, Wellington, New Zealand, (2)National Institute of Water and Atmospheric Research, Wellington, New Zealand, (3)The Australian National University, Research School of Earth Sciences, Canberra, Australia, (4)Ministry of Primary Industries, Auckland, New Zealand, (5)University of Melbourne, School of Earth Sciences, Parkville, VIC 3010, Australia
 
Timing and Paleoceanographic Impacts of Deglaciation of the Arctic Island Channels between the Arctic Ocean and Baffin Bay during the Holocene (715782)
Anne E Jennings1, Nicole Brooks2, Robert Kelleher2, Shaoting Feng3, John T Andrews2, Alexandra Jahn4, Marchitto Thomas1, Julio Sepulveda5 and Benoit Lecavalier6, (1)Institute of Arctic and Alpine Research, Boulder, CO, United States, (2)University of Colorado, INSTAAR, Boulder, CO, United States, (3)University of Colorado, INSTAAR, Boulder, United States, (4)University of Colorado Boulder, Atmospheric and Oceanic Sciences and Institute of Arctic and Alpine Research (INSTAAR), Boulder, CO, United States, (5)University of Colorado at Boulder, Department of Geological Sciences and the Institute of Arctic and Alpine Research, Boulder, CO, United States, (6)Memorial University of Newfoundland, St John's, NL, Canada
 
Utilizing shipboard sediment green-blue color ratio to constrain glacial-interglacial changes in South Pacific diatom productivity (718612)
Chen Li1, Vincent J Clementi2, Samantha Claudia Bova2, Yair Rosenthal2, Christopher D Charles3, James Wright4, Zhimin Jian5 and Scientific Team of Expedition 379T , (1)Tongji University, Shanghai, China, (2)Rutgers University, Department of Marine and Coastal Sciences, New Brunswick, NJ, United States, (3)Scripps Institution of Oceanography, La Jolla, CA, United States, (4)Rutgers University New Brunswick, Department of Earth and Planetary Sciences, New Brunswick, NJ, United States, (5)Tongji University, State Key Laboratory of Marine Geology, Shanghai, China
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