BN12A:
Biogeochemical Processes Across Oxic-Anoxic Transitions II


Session ID#: 37449

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:  Jeffry V Sorensen, University of Victoria, School of Earth and Ocean Sciences, Victoria, BC, Canada
Co-chairs:  Florian Scholz, Geomar Helmholtz Center 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
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:

Using a New Method to Reassess the Dissolved Iron(II) Feature in the Eastern Tropical North Pacific Oxygen Deficient Zone (315244)
Kenneth McCarthy Bolster, University of Southern California, Department of Earth Sciences, Los Angeles, CA, United States and James Moffett, USC-Biology, Los Angeles, CA, United States
Ventilation pathways for the Pacific Oxygen Deficient Zone revealed by secondary oxygen maxima and Lagrangian particle tracking (324223)
Andrew John Margolskee, University of Washington Seattle, School of Oceanography, Seattle, WA, United States, Steven R Emerson, University of Washington, School of Oceanography, Seattle, WA, United States, Hartmut Frenzel, University of Washington Seattle Campus, Seattle, WA, United States and Curtis A. Deutsch, University of Washington Seattle Campus, School of Oceanography, Seattle, WA, United States
From Fjords to Open Seas: A Decade of Geochemical and Multi-Omic Time Series Observations From the Saanich Inlet Redoxcline (307957)
Steven James Hallam1, Alyse Kathleen Hawley1, Mónica Torres-Beltrán2, Sean Crowe3, Frank A Whitney4 and Philippe D. Tortell5, (1)University of British Columbia, Microbiology & Immunology, Vancouver, BC, Canada, (2)University of British Columbia, Microbiology and Immunology, Vancouver, BC, Canada, (3)University of British Columbia, Department of Microbiology and Immunology, Vancouver, BC, Canada, (4)Institute of Ocean Sciences, Sidney, BC, Canada, (5)University of British Columbia, Earth, Ocean and Atmospheric Sciences, Vancouver, BC, Canada
Acid-base chemistry across the oxic-anoxic transition in Chesapeake Bay and other systems (305905)
Wei-Jun Cai, University of Delaware, Newark, DE, United States and George W Luther III, University of Delaware, College of Earth, Ocean and Environment, Lewes, DE, United States

See more of: Biogeochemistry and Nutrients