OB21A:
Marine Deoxygenation in a Changing Climate: Drivers, Detection, and Ecosystem Impacts I

Session ID#: 93149

Session Description:
Oxygen sustains life in the ocean and present observational evidence suggests its declining trend. Over the 21st century, with climate warming, Earth system models project continued deoxygenation and expanded oxygen minimum zones. This, in turn, could affect the cycling of nutrients and other chemical tracers, which could alter the biologically mediated carbon pump and feedback to climate system. Advancement in deoxygenation predictions as well as better understanding of its drivers, spatial extents, rates, and impact on ecosystem (functioning, service, biodiversity, etc.) are essential to develop future management and adaptation strategies in respond to changing marine ecosystem functions and resources. This session invites regional-to-global scale (i) observational and modeling contributions that elucidate the role of climate-induced changes in ocean’s physical and biogeochemical properties on the oxygen variability, (ii) novel model-data analysis approaches to determine the rates of and to provide early detection of oxygen changes, and (iii) studies that uncover evidence of past deoxygenation from paleo-proxies in elucidating its ecosystem impacts.
Co-Sponsor(s):
  • OC - Ocean Change: Acidification and Hypoxia
  • PC - Past, Present and Future Climate
  • PI - Physical-Biological Interactions
Primary Chair:  Jerry Tjiputra, NORCE Norwegian Research Centre and Bjerknes Centre for Climate Research, Bergen, Norway
Co-chairs:  Yohei Takano, Max Planck Institute for Meteorology, Hamburg, Germany, Zouhair Lachkar, New York University in Abu Dhabi, Center for Prototype Climate Modeling (CPCM), Abu Dhabi, United Arab Emirates and Daoxun Sun, Georgia Institute of Technology Main Campus, Atlanta, GA, United States
Primary Liaison:  Yohei Takano, Max Planck Institute for Meteorology, Hamburg, Germany
Moderators:  Jerry Tjiputra, NORCE Climate, Bergen, Norway and Yohei Takano, Georgia Institute ofTechnology, Atlanta, United States
Student Paper Review Liaisons:  Jerry Tjiputra, NORCE Climate, Bergen, Norway and Yohei Takano, Georgia Institute ofTechnology, Atlanta, United States

Abstracts Submitted to this Session:

Climatic control of regional ocean deoxygenation: insights from recent trends in the north Indian Ocean (650565)
Zouhair Lachkar1, Muchamad Al Azhar1, Michael Mehari2, Marina Levy3 and K. Shafer Smith4, (1)New York University Abu Dhabi, Center for Prototype Climate Modeling (CPCM), Abu Dhabi, United Arab Emirates, (2)New York University Abu Dhabi, Center for Prototype Climate Modeling (CPCM), United Arab Emirates, (3)Laboratoire d'océanographie et du climat : expérimentations et approches numériques (LOCEAN), Paris, France, (4)New York University, Courant Institute of Mathematical Sciences, New York, NY, United States
Mechanisms of low-frequency oxygen variability in the North Pacific (649390)
Takamitsu Ito, Georgia Institute of Technology, Atlanta, GA, United States, Matthew C Long, National Center for Atm Res, Boulder, CO, United States, Curtis A. Deutsch, University of Washington Seattle Campus, School of Oceanography, Seattle, United States, Shoshiro Minobe, Hokkaido Univ-Grad. School Sci, Natural History Sciences, Sapporo, Japan and Daoxun Sun, Georgia Institute of Technology Main Campus, Atlanta, GA, United States
Multi-decadal oxygen loss in the North Atlantic driven by stratification and surface nutrient depletion (657245)
Andrew John Margolskee, University of Washington Seattle, School of Oceanography, Seattle, WA, United States, Takamitsu Ito, Georgia Institute of Technology, Atlanta, GA, United States, Matthew C Long, National Center for Atm Res, Boulder, CO, United States, Hartmut Frenzel, University of Washington Seattle Campus, School of Oceanography, Seattle, WA, United States and Curtis A. Deutsch, University of Washington Seattle Campus, School of Oceanography, Seattle, United States
'Modulation of the North Atlantic Deoxygenation by The Slowdown of the Nutrient Stream' (646089)
Filippos Tagklis1, Takamitsu Ito2 and Annalisa Bracco1, (1)Georgia Institute of Technology Main Campus, Atlanta, GA, United States, (2)Georgia Institute of Technology, Atlanta, GA, United States
Implications of Ocean Oxygen Availability from Particulate Organic Carbon-to-Oxygen Respiration Quotient (640947)
Allison Moreno1, Catherine Garcia2, Alyse Larkin3, Jenna Lee4, Wei-Lei Wang5, Francois Primeau2, Jefferson Keith Moore2 and Adam Martiny2, (1)University of California Irvine, Ecology and Evolutionary Biology, Irvine, CA, United States, (2)University of California Irvine, Earth System Science, Irvine, CA, United States, (3)Duke University, NC, United States, (4)Princeton University, Geosciences, Princeton, United States, (5)University of California Irvine, Irvine, CA, United States
Sensitivity of the ocean oxygen inventory and the size of oxygen minimum zones to the particulate organic matter remineralization length scale (655589)
Gregory L. Britten, Massachusetts Institute of Technology, 4Program in Atmospheres, Oceans, and Climate, Cambridge, United States and Francois Primeau, University of California Irvine, Earth System Science, Irvine, CA, United States
Glacial Deep Ocean Deoxygenation Driven By Biologically Mediated Air-sea Disequilibrium (645493)
Ellen Cliff1, Samar Khatiwala1 and Andreas Schmittner2, (1)University of Oxford, Department of Earth Sciences, Oxford, United Kingdom, (2)Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, United States