OS32D:
Understanding Changing Ocean Biogeochemistry II


Submit an Abstract to this Session


Session ID#: 57638

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, Matthew C Long, [C]Worthy, LLC, Boulder, United States and Galen A McKinley, Columbia University and Lamont-Doherty Earth Observatory, New York, United States
OSPA Liaison:  Galen A McKinley, Columbia University and Lamont-Doherty Earth Observatory, New York, 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:

Variability in Southern Ocean air-sea carbon dioxide fluxes estimated from biogeochemical profiling floats (Invited) (351119)
Alison R Gray1, Kenneth S Johnson2, Seth M Bushinsky3, Stephen Riser1, Joellen L Russell4, Lynne D Talley5, Richard H Wanninkhof6, Nancy L Williams7 and Jorge L Sarmiento3, (1)University of Washington, School of Oceanography, Seattle, United States, (2)Monterey Bay Aquarium Research Institute, Moss Landing, CA, United States, (3)Princeton University, Program in Atmospheric and Oceanic Sciences, Princeton, NJ, United States, (4)University of Arizona, Department of Geosciences, Tucson, AZ, United States, (5)Scripps Institution of Oceanography, UCSD, La Jolla, United States, (6)NOAA Atlantic Oceanographic and Meteorological Laboratory, Ocean Chemistry and Ecosystems Division, Miami, FL, United States, (7)NOAA Pacific Marine Environmental Laboratory, Seattle, WA, United States
Regional divergence of dominant modes of the air-sea CO2 flux variability (405452)
Peter Landschuetzer1, Tatiana Ilyina1 and Nicole S Lovenduski2, (1)Max Planck Institute for Meteorology, Hamburg, Germany, (2)University of Colorado, Department of Atmospheric and Oceanic Sciences, Boulder, CO, United States
Observations-constrained projections reveal early and strong deoxygenation in the interior North Atlantic (344174)
Jerry Tjiputra, NORCE Norwegian Research Centre and Bjerknes Centre for Climate Research, Bergen, Norway, Nadine Goris, NORCE Climate and Bjerknes Centre for Climate Research, Bergen, Norway, Siv Lauvset, Uni Research, Uni Climate, Bergen, Norway, Christoph Heinze, University of Bergen, Bergen, Norway, Are Olsen, University of Bergen, Geophysical Institute and Bjerknes Centre for Climate Research, Bergen, Norway, Jorg Schwinger, NORCE Climate, Bergen, Norway and Reiner Steinfeldt, Institute of Environmental Physics (IUP) University of Bremen, Bremen, Germany
The importance of the equatorial current system for variability in the oxygen minimum zones (444681)
Julius Johannes Marian Busecke and Laure Resplandy, Princeton University, Department of Geosciences, Princeton, NJ, United States
Marine Nitrogen Fixers, Low Oxygen Zones and Iron Supply: a Low Latitude Control on Atmospheric CO2 (393672)
Pearse James Buchanan1, Zanna Chase2, Richard Matear3, Steven J Phipps4 and Nathaniel L. Bindoff2, (1)Institute for Marine and Antarctic Studies, Taroona, TAS, Australia, (2)University of Tasmania, Institute for Marine and Antarctic Studies, Hobart, TAS, Australia, (3)CSIRO, Oceans & Atmosphere, Hobart, TAS, Australia, (4)Climate Change Research Centre, UNSW Sydney, Australia
Impact of Ocean-Atmospheric Signals on the Net Community Production in the Northeast Pacific Ocean (419912)
Mariana Bernardi Bif, University of Miami, Rosenstiel School of Marine & Atmospheric Chemistry, Miami, United States, Leo Siqueira, RSMAS, Miami, FL, United States and Dennis A Hansell, University of Miami, Miami, FL, United States
Is there "just enough" iron in the ocean? Climatic effects of the iron-microbe feedback. (458583)
Jonathan Maitland Lauderdale1, Gael Forget2, Rogier Braakman3, Stephanie Dutkiewicz3 and Michael J Follows3, (1)Massachusetts Institute of Technology, Department of Earth, Atmospheric and Planetary Sciences, Cambridge, MA, United States, (2)Massachusetts Institute of Technology, EAPS, Cambridge, United States, (3)Massachusetts Institute of Technology, Department of Earth, Atmospheric and Planetary Sciences, Cambridge, United States
Multicentury Global Warming and the Future of the Marine Biosphere (435103)
Jefferson Keith Moore, University of California Irvine, Earth System Science, Irvine, United States

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