OC43A:
Advances in Modeling O2 and pH in the Ocean: From Physics to Fish I


Session ID#: 37123

Session Description:
Trends of declining O2 and pH are frequently reported in the coastal and open ocean and are environmental concerns because of their deleterious effects on marine life and alterations of biogeochemical cycles. In the coastal zone, bottom water hypoxia and acidification are driven by land-based nutrient loads and physical processes such as stratification or upwelling. Acidification in the open ocean is driven by CO2 uptake and the carbon pump. Drivers of O2 declines in the open ocean are linked to large-scale changes in sea surface temperature, depth of the surface mixed layer, and upwelling. Due to the complex interactions of these physical and biological processes, which cannot be fully characterized through observations alone, numerical models are important research tools for quantifying mechanisms, assessing ecosystem impacts, and evaluating how anthropogenic activities may affect conditions. This session is devoted to the presentation of diverse modeling approaches, including those focused on describing the mechanisms controlling deoxygenation and acidification, on anthropogenic and climatic influences on these conditions, and on their ecological effects. We invite studies that predict the O2 and CO2 systems, including their effects, spanning topics from physics to fish. Applicable models range from fully empirical to complex three-dimensional models.
Primary Chair:  John C Lehrter, University of South Alabama, Marine Sciences, Mobile, AL, United States
Co-chairs:  Katja Fennel, Dalhousie University, Department of Oceanography, Halifax, NS, Canada and Dubravko Justic, Louisiana State University, Oceanography and Coastal Sciences, Baton Rouge, LA, United States
Moderators:  Dubravko Justic, Louisiana State University, Oceanography and Coastal Sciences, Baton Rouge, LA, United States, Katja Fennel, Dalhousie University, Department of Oceanography, Halifax, NS, Canada and John C Lehrter, Dauphin Island Sea Lab, Dauphin Island, AL, United States
Student Paper Review Liaison:  John C Lehrter, Dauphin Island Sea Lab, Dauphin Island, AL, United States
Index Terms:

4802 Anoxic environments [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4805 Biogeochemical cycles, processes, and modeling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4813 Ecological prediction [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4834 Hypoxic environments [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
Cross-Topics:
  • BN - Biogeochemistry and Nutrients
  • F - Fisheries
  • OM - Ocean Modeling
  • RS - Regional Studies

Abstracts Submitted to this Session:

Assessing and predicting the effects of reduced nutrients and hypoxia on fishes in the Gulf of Mexico (313906)
Stephen Brandt1, Arnaud Laurent2, Cassandra Glaspei1, Cynthia Sellinger1 and Kim de Mutsert3, (1)Oregon State University, Corvallis, OR, United States, (2)Dalhousie University, Halifax, NS, Canada, (3)George Mason University, Environmental Science and Policy, Fairfax, VA, United States
Modeling fish movement in 3-D (302104)
Elizabeth LaBone1, Dubravko Justic1, Kenneth Rose2, Lixia Wang1 and Haosheng Huang1, (1)Louisiana State University, Oceanography and Coastal Sciences, Baton Rouge, LA, United States, (2)University of Maryland Center for Environmental Science, Horn Point Laboratory, Cambridge, MD, United States
Assessing the Effects of Proposed Mississippi River Diversions on the Gulf of Mexico Hypoxic Zone (315451)
Dubravko Justic and Lixia Wang, Louisiana State University, Oceanography and Coastal Sciences, Baton Rouge, LA, United States
Physical Forcing of Dissolved Inorganic Carbon and Oxygen Variability on the Continental Margin of Southern Vancouver Island : A 2D Biogeochemical Modelling Approach (325540)
Zelalem Engida, University of Victoria, Victoria, BC, Canada, Debby Ianson, Institute of Ocean Sciences, Fisheries and Oceans Canada,, Sidney, BC, Canada and Adam H Monahan, Univ Victoria, Victoria, BC, Canada
Factors Influencing Spatial and Temporal Variability in Hypoxia on Heceta Bank, Oregon, Using a Model and Observations (313505)
Scott Michael Durski, Oregon State University, Corvallis, OR, United States, Jack A Barth, Oregon State University, Marine Studies Initiative, Corvallis, OR, United States, Samantha A Siedlecki, Univ of Washington-JISAO, Seattle, WA, United States and Parker MacCready, Univ. Washington, Olympia, WA, United States
Modeling Carbonate System Dynamics and Responses to Nutrient Loading Changes in Chesapeake Bay (322702)
Chunqi Shen, University of Maryland (UMCES CBL), MD, United States and Jeremy M Testa, University of Maryland Center for Environmental Science, Chesapeake Biological Laboratory, Solomons, MD, United States
Deoxygenation Trends and Their Ecosystem Impacts in Atlantic Canada (307727)
Katja Fennel1, Krysten E. Rutherford1, Angela M Kuhn1, Wenxia Zhang2, David Brickman3 and Catherine E. Brennan1, (1)Dalhousie University, Department of Oceanography, Halifax, NS, Canada, (2)Dalhousie University, Oceanography, Halifax, NS, Canada, (3)Bedford Institute of Oceanography, Fisheries and Oceans Canada, Dartmouth, NS, Canada

See more of: Ocean Change: Acidification and Hypoxia