BN11A:
Biogeochemical Processes Across Oxic-Anoxic Transitions I


Session ID#: 37455

Session Description:
A suite of metabolically and chemically important oxidation-reduction reactions occur through the transitions from oxic to anoxic regions of the ocean. These reactions drive nutrient availability and metal solubility, as well as organic matter production, consumption, and preservation. As oxygen minimum and deficient zones expand, redox reactions in low to no oxygen environments are becoming globally more important, both for the nitrogen and carbon cycles and also for trace metals. Understanding such environments can provide an important analogue for ocean chemistry and microbial life during past periods of widespread ocean anoxia. This session seeks to bring together geochemical, biological, and physical scientists working on low oxygen and anoxic environments, in order to create an integrated picture of biogeochemistry in these systems. Presentations from observational, experimental, or modeling standpoints on nutrients, trace elements, dissolved gases, isotope systematics, microbiology, biological productivity, or physical drivers in these systems are all invited. We especially encourage submissions investigating the redox transition in the water column or sediments of restricted basins such as Saanich Inlet and the Black Sea, as well as open-marine systems such as the Eastern Tropical Pacific, North Atlantic, and Indian OMZs.
Primary Chair:  Florian Scholz, Geomar Helmholtz Center for Ocean Research Kiel, Kiel, Germany
Co-chairs:  Jeffry V Sorensen1, Roberta Claire Hamme1 and Tim M Conway2, (1)University of Victoria, School of Earth and Ocean Sciences, Victoria, BC, Canada(2)University of South Florida, St. Petersburg, FL, United States
Moderators:  Florian Scholz, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany, Roberta Claire Hamme, University of Victoria, School of Earth and Ocean Sciences, Victoria, BC, Canada and Tim M Conway, University of South Florida, St. Petersburg, FL, United States
Student Paper Review Liaison:  Jeffry V Sorensen, University of Victoria, School of Earth and Ocean Sciences, Victoria, BC, Canada
Index Terms:

1615 Biogeochemical cycles, processes, and modeling [GLOBAL CHANGE]
4802 Anoxic environments [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4802 Anoxic environments [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4807 Chemical speciation and complexation [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4845 Nutrients and nutrient cycling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4845 Nutrients and nutrient cycling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4875 Trace elements [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
Cross-Topics:
  • MG - Marine Geology and Sedimentology

Abstracts Submitted to this Session:

Jay T. Cullen, University of Victoria, School of Earth and Ocean Sciences, Victoria, BC, Canada and Laurence A Coogan, University of Victoria, Victoria, BC, Canada
Kathryn Balind1, Andrew Barber2 and Yves Gelinas2, (1)Concordia University, Montreal, QC, Canada, (2)Concordia University, Chemistry and Biochemistry, Montreal, QC, Canada