OS31C:
Understanding Changing Ocean Biogeochemistry I


Submit an Abstract to this Session


Session ID#: 57632

Session Description:
Significant large-scale change in ocean biogeochemistry is observed and modeled, and these changes are expected to intensify as climate continues to change. The ocean carbon content is increasing, but air-sea flux variability is significant and poorly constrained. Oxygen is decreasing with complex patterns influenced by both changing circulation and productivity. Substantial variations in primary productivity are observed, but the mechanistic drivers are debated.  This session will explore these and other biogeochemical changes in the context of several central questions. How is ocean biogeochemistry changing in the present day? To what degree can ocean models reliably project future changes? What are the mechanisms of change? How can we distinguish natural variability from long-term change?  Studies using observations, models and/or theory are welcome. Large-scale patterns of variability and change are the focus, but local or regional studies that inform the large-scale perspective are also welcome.
Primary Convener:  Galen A McKinley, Columbia University and Lamont-Doherty Earth Observatory, New York, United States
Conveners:  Anastasia Romanou, NASA Goddard Institute for Space Studies, New York, NY, United States and Matthew C Long, [C]Worthy, LLC, Boulder, United States
Primary Liaison:  Galen A McKinley, Columbia University and Lamont-Doherty Earth Observatory, New York, United States
Chairs:  Anastasia Romanou, NASA Goddard Institute for Space Studies, New York, NY, United States and Matthew C Long, [C]Worthy, LLC, Boulder, United States
OSPA Liaison:  Matthew C Long, [C]Worthy, LLC, Boulder, United States

Cross-Listed:
  • B - Biogeosciences
  • GC - Global Environmental Change
  • PP - Paleoceanography and Paleoclimatology
Index Terms:

4805 Biogeochemical cycles, processes, and modeling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4806 Carbon cycling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4813 Ecological prediction [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4815 Ecosystems, structure, dynamics, and modeling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]

Abstracts Submitted to this Session:

Synthesis and intercomparison of ocean carbon uptake in CMIP6 models: an Ocean Carbon and Biogeochemistry Workshop summary (Invited) (349652)
John P Dunne, NOAA Geophys Fluid Dynamic, Princeton, United States, Scott C Doney, University of Virginia, Department of Environmental Sciences, Charlottesville, VA, United States, Matthew C Long, [C]Worthy, LLC, Boulder, United States, Galen A McKinley, Columbia University and Lamont-Doherty Earth Observatory, New York, United States and Anastasia Romanou, NASA Goddard Institute for Space Studies, New York, NY, United States
A Modified Marine Carbon Cycle Under RCP8.5: Implications for Ocean Carbon Storage (441239)
Andrea J Fassbender, Monterey Bay Aquarium Research Institute, Moss Landing, CA, United States, Keith B Rodgers, IBS Center for Climate Physics, Busan, South Korea and Sarah Schlunegger, Princeton University, Atmospheric and Oceanic Sciences, Princeton, NJ, United States
Century-Scale Changes in the Seasonality and Drivers of CO2 in CMIP5 ESMs in the Southern Ocean (442182)
Precious Mongwe, Nation Center for Atmospheric Research, Climate and Global Dynamics (CGD), Boulder, CO, United States; University of Cape Town, Cape Town, South Africa, Pedro M. S. Monteiro, School for Climate Studies, Stellenbosch University, South Africa and Marcello Vichi, University of Cape Town, Department of Oceanography, Marine and Antarctic Research centre for Innovation and Sustainability (MARIS), Cape Town, South Africa
Sensitivity of ocean carbon export flux projections to the choice of export depth horizon (396642)
Hilary I Palevsky, Wellesley College, Department of Geosciences, Wellesley, MA, United States and Scott C Doney, University of Virginia, Department of Environmental Sciences, Charlottesville, VA, United States
How Did the 2017/2018 Heat Wave Over the Tasman Sea Affect Ocean Carbon Uptake and Biogeochemistry? (386925)
Sara E Mikaloff-Fletcher1, Zoe M Loh2, Gordon W Brailsford3, Matt Pinkerton1, Erik Behrens4, Paul B Krummel5, Ray Leonard Langenfelds6, Clifford Stephen Law1, Rowena Claire Moss1, Sylvia Nichol3, Ann Stavert7, Philip Sutton3, Jocelyn C Turnbull8 and Ben Noll3, (1)National Institute of Water and Atmospheric Research (NIWA), Wellington, New Zealand, (2)CSIRO, Oceans and Atmosphere, Aspendale, Australia, (3)National Institute of Water and Atmospheric Research, Wellington, New Zealand, (4)Earth Sciences New Zealand, Wellington, New Zealand, (5)CSIRO, Aspendale, Australia, (6)CSIRO Environment, Aspendale, Australia, (7)Commonwealth Scientific and Industrial Research Organisation (CSIRO), Aspendale, VIC, Australia, (8)GNS Science, Lower Hutt, New Zealand
On the role of the Gulf Stream in the changing Atlantic nutrient circulation during the 21st century (376326)
Daniel B Whitt, National Center for Atmospheric Research, Climate and Global Dynamics Laboratory, Boulder, CO, United States
The Influence of Deep Convection on Biologically Driven Carbon Sequestration in the Irminger Sea (443929)
Lucy Wanzer, Oregon State University, College of Earth Ocean and Atmospheric Sciences, Corvallis, United States and Hilary I Palevsky, Wellesley College, Department of Geosciences, Wellesley, MA, United States
Heavy Noble Gas Isotopes as Novel Tracers of Gas Exchange During Deepwater Formation (422815)
Jeffrey P Severinghaus, Scripps Institution of Oceanography, La Jolla, United States, Alan M Seltzer, Scripps Institution of Oceanography, La Jolla, CA, United States and Frank J Pavia, California Institute of Technology, Pasadena, United States

See more of: Ocean Sciences