OC21A:
Ocean Deoxygenation: Impacts and Predictions I


Session ID#: 37144

Session Description:
The global oceans are losing oxygen and oxygen minimum zones are predicted to expand, although the rates and even sign of oxygen change vary regionally, as indicated by new compilations of available oxygen measurements. An array of physical, biogeochemical and biological processes affect marine oxygen levels on time scales from days to centuries and space scales from meters to ocean basins, making it difficult to attribute oxygen changes to natural or anthropogenic causes. Furthermore, near oxygen depleted areas, local oxygen variability may exceed long term trends because of a variety of physical and biological processes. The impacts of these variations on marine organisms include effects on physiology, distributions, life cycles, and ecosystem function. Impacts are far from obvious, and the future outlook is uncertain. Furthermore current climate models have difficulties reproducing low oxygen regions and patterns of oxygen changes observed over past decades and also the biological effects of regional variability. This session invites observational, experimental, and modeling studies that address patterns and variability of marine oxygen distributions, their change during the historical period, and the mechanisms or impacts on organisms (from microbes to zooplankton and fish) of deoxygenation, as well as studies projecting future oxygen distributions.
Primary Chair:  Sunke Schmidtko, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
Co-chairs:  Karen Wishner, University of Rhode Island, Graduate School of Oceanography, Narragansett, RI, United States and Curtis A. Deutsch, University of Washington Seattle Campus, School of Oceanography, Seattle, WA, United States
Moderators:  Karen Wishner, University of Rhode Island Narragansett Bay, Narragansett, RI, United States, Sunke Schmidtko, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany and Curtis A. Deutsch, University of Washington Seattle Campus, School of Oceanography, Seattle, WA, United States
Student Paper Review Liaison:  Karen Wishner, University of Rhode Island Narragansett Bay, Narragansett, RI, United States
Index Terms:

1615 Biogeochemical cycles, processes, and modeling [GLOBAL CHANGE]
1630 Impacts of global change [GLOBAL CHANGE]
1635 Oceans [GLOBAL CHANGE]
4834 Hypoxic environments [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
Cross-Topics:
  • B - Biodiversity
  • BN - Biogeochemistry and Nutrients
  • IS - Ocean Observatories, Instrumentation and Sensing Technologies
  • OM - Ocean Modeling

Abstracts Submitted to this Session:

ELEVATED MARINE OXYGEN INVENTORY IN A WARMER FUTURE OCEAN (316183)
Andreas Oschlies, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany and Wolfgang Koeve, GEOMAR Helmholtz Centre for Ocean Research Kiel, Marine Biogeochemical Modeling, Kiel, Germany
Global Oxygen Decline in Observations and CMIP5 Models (323165)
Sunke Schmidtko1, Andreas Oschlies1, Wolfgang Koeve2 and Julia Getzlaff1, (1)GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany, (2)GEOMAR Helmholtz Centre for Ocean Research Kiel, Marine Biogeochemical Modeling, Kiel, Germany
How Does the Motion in the Ocean Breathe Life into Shelf Seas? An Autonomous Study of Vertical Mixing and Ventilation (310354)
Charlotte Anne June Williams, National Oceanography Centre, Liverpool, United Kingdom, Matthew Palmer, National Oceanography Center, Liverpool, United Kingdom, Claire Mahaffey, University of Liverpool, Earth, Ocean and Ecological Sciences, Liverpool, United Kingdom and Clare Elizabeth Davis, University of Liverpool, Earth, Oceans and Ecosystem Sciences, Liverpool, United Kingdom
Small-scale Biological and Physical Variability at Midwater Depths in the Eastern Tropical North Pacific Oxygen Minimum Zone (312873)
Karen Wishner1, Dawn Outram1, Christopher Roman1, Brad Seibel2, Caroline Tracy Shaw3, Thomas Adams4, Valerie J Loeb5, Danielle Moore1 and Shannon Leah Riley6, (1)University of Rhode Island, Graduate School of Oceanography, Narragansett, RI, United States, (2)University of South Florida St. Petersburg, St Petersburg, FL, United States, (3)University of South Florida, College of Marine Science, St Petersburg, FL, United States, (4)Cold Spring Harbor Laboratory, Cold Spring Harbor, NY, United States, (5)Moss Landing Marine Laboratories, Moss Landing, CA, United States, (6)Oregon State University, Corvallis, OR, United States
Euphausiid Distribution in Relation to Low-Oxygen Features in the Eastern Tropical Pacific (322431)
Caroline Tracy Shaw1, Karen Wishner2, Dawn Outram2, Chris Roman2, Allison Smith-Mislan3 and Brad Seibel4, (1)University of South Florida, College of Marine Science, St Petersburg, FL, United States, (2)University of Rhode Island, Graduate School of Oceanography, Narragansett, RI, United States, (3)University of Washington, School of Oceanography, Seattle, WA, United States, (4)University of South Florida St. Petersburg, St Petersburg, FL, United States

See more of: Ocean Change: Acidification and Hypoxia