CT44A:
Biogeochemical Cycles in Oxygen Minimum Zones: Mechanisms, Drivers, and Change II Posters

Session ID#: 85226

Session Description:
Oxygen minimum zones in the coastal and open ocean are spatially expanding and intensifying, with model projections showing continued O2 loss in the future. These regions play a fundamental role in the biogeochemical cycles of elements such as carbon, nitrogen and sulfur as well as trace elements, host microbial communities with diverse metabolic pathways, and act as significant sources and sinks of nutrients and climatically relevant (greenhouse) gases. Yet, significant questions on the nature, drivers and variability of these processes remain. This session aims to build a comprehensive view of oxygen minimum zone biogeochemistry, by inviting researchers who apply a variety of approaches to these problems, from field and laboratory measurements, to -omics based studies, to observational synthesis and numerical models. Specifically, we invite submissions investigating: (1) the distribution, speciation and transformation of macronutrients (N, P, Si), trace metals (e.g. Mn, Fe, Co, Ni, Cu, Zn, Cd), redox-active elements (e.g. S, Cr, Mo, I) and their isotopes; (2) microbial interactions and their impacts on biogeochemical cycles; (3) processes occurring in and around particle-associated microenvironments, and (4) the physical drivers and variability of these processes. Studies assessing regional or global impacts with large/new datasets, e.g. from international programs such as GEOTRACES, and integrative approaches combining modeling, field/laboratory measurements, and/or microbial and molecular approaches are especially encouraged.
Co-Sponsor(s):
  • OB - Ocean Biology and Biogeochemistry
Index Terms:

4805 Biogeochemical cycles, processes, and modeling [OCEANOGRAPHY: CHEMICAL]
4851 Oxidation/reduction reactions [OCEANOGRAPHY: CHEMICAL]
4870 Stable isotopes [OCEANOGRAPHY: CHEMICAL]
4875 Trace elements [OCEANOGRAPHY: CHEMICAL]
Primary Chair:  David Janssen, University of Bern, Institute of Geological Sciences & Oeschger Center for Climate Change Research, Bern, Switzerland
Co-chairs:  Daniele Bianchi, University of California Los Angeles, Atmospheric and Oceanic Sciences, Los Angeles, CA, United States and Thomas S Weber, University of Rochester, Department of Earth and Environmental Sciences, Rochester, NY, United States
Primary Liaison:  David Janssen, University of Bern, Institute of Geological Sciences & Oeschger Center for Climate Change Research, Bern, Switzerland
Moderators:  David Janssen, University of Bern, Institute of Geological Sciences & Oeschger Center for Climate Change Research, Bern, Switzerland and Daniele Bianchi, McGill University, Montreal, QC, Canada
Student Paper Review Liaisons:  David Janssen, University of Bern, Institute of Geological Sciences & Oeschger Center for Climate Change Research, Bern, Switzerland and Daniele Bianchi, McGill University, Montreal, QC, Canada

Abstracts Submitted to this Session:

 
Biological Sink of Nitrous Oxide in Oxygen Minimum Zones (642084)
Xin Sun1, John Tracey2, Colette LaMonica Kelly3, Elizabeth Wallace4, Amal Jayakumar1, Karen L Casciotti5 and Bess B Ward2, (1)Princeton University, Princeton, NJ, United States, (2)Princeton University, Department of Geosciences, Princeton, NJ, United States, (3)Stanford University, Stanford, CA, United States, (4)Princeton University, United States, (5)Stanford University, Stanford, United States
 
Trace Gases Variability in the Oxygen-Depleted African Eastern Boundary (646770)
Bita Sabbaghzadeh1, Stefan Otto2, Michael Glockzin1, Marcus Dengler3 and Gregor J Rehder4, (1)Leibniz Institute for Baltic Sea Research, Marine Chemistry, Rostock, Germany, (2)Leibniz Institute for Baltic Sea Research, Rostock, Germany, (3)GEOMAR, Kiel, Germany, (4)Leibniz Institute for Baltic Sea Research, Department of Marine Chemistry, Rostock, Germany
 
An East-West transect of N2 gas Across the Eastern Tropical North Pacific Oxygen Deficient Zone (654826)
Clara A Fuchsman, University of Maryland Center for Environmental Science Horn Point Laboratory, Cambridge, MD, United States and Allan Devol, University of Washington, School of Oceanography, Seattle, WA, United States
 
Testing in situ incubators to measure rates of microbial nitrogen transformations in the Eastern Tropical North Pacific oxygen deficient zone (654618)
Karen V Gutierrez, UC San Diego, Scripps Institution of Oceanography, San Diego, United States, Pascale Anabelle Baya, Géosciences Environnement Toulouse (GET), UMR CNRS / IRD / Université Paul Sabatier, Toulouse, France, Colette LaMonica Kelly, Stanford University, Stanford, CA, United States, Nicole Mayu Travis, Stanford University, Earth Systems Science, Stanford, CA, United States, Tyler Tamasi, MIT, Department of Earth, Atmospheric, and Planetary Sciences, United States, Andrew R Babbin, Princeton University, Princeton, NJ, United States, Craig Taylor, Woods Hole Oceanographic Institution, Biology Department, United States, Virginia P Edgcomb, Woods Hole Oceanographic Institution, Geology and Geophysics Department, Woods Hole, MA, United States and Karen L Casciotti, Stanford University, Stanford, United States
 
Microbial Response in a Simulated Overturn of an Oxygen Minimum Zone; Devil’s Hole, Bermuda (644336)
Rachel Jane Parsons1, Craig A Carlson2, Shuting Liu2, Rebecca Garley1, Ben Temperton3 and Nicholas Robert Bates4, (1)Bermuda Institute of Ocean Sciences, St.George's, Bermuda, (2)University of California Santa Barbara, Marine Science Institute/Department of Ecology, Evolution and Marine Biology, Santa Barbara, CA, United States, (3)University of Exeter, Exeter, United Kingdom, (4)Bermuda Institute of Ocean Sciences, St. George's, Bermuda
 
Interleaving of oxygenized intrusions into the Baltic Sea redoxcline (645653)
Peter Ludwig Holtermann, Leibniz Institute for Baltic Sea Research (IOW), Rostock, Germany, Ralf D Prien, IOW, Rostock, Germany, Michael Naumann, Leibniz Institute for Baltic Sea Research, Rostock, Germany and Lars Umlauf, Leibniz Institute for Baltic Sea Research (IOW), Warnemuende, Germany
 
Investigating Cr reduction in the Eastern Tropical North Pacific oxygen deficient zone with Cr isotope signatures (647903)
Tianyi Huang and Edward A Boyle, Massachusetts Institute of Technology, Cambridge, MA, United States
 
The cerium anomaly and manganese cycling processes in oxygen deficient zones (653905)
Alexis Floback1, Kenneth McCarthy Bolster2, Xiaopeng Bian2, James W Moffett3 and Prof Seth John2, (1)University of Southern California, Department of Biological Sciences, Los Angeles, United States, (2)University of Southern California, Department of Earth Sciences, Los Angeles, CA, United States, (3)University of Southern California, Los Angeles, CA, United States
 
9-Year Challenge of the Oxygen Minimum Zone in the Mexican Tropical Eastern Pacific: 2018 vs 2009 and interannual variability (650660)
David Rivas, Center for Scientific Research and Higher Education at Ensenada, Ensenada, Mexico, Jaime Farber Lorda, Centro de Investigación Científica y de Educación Superior de Ensenada, Ecología, Ensenada, BJ, Mexico, Francois Counillon, Nansen Environmental and Remote Sensing Centre; Bjerknes Centre for Climate Research, Bergen, Norway and Noel S Keenlyside, Geophysical Institute, Juneau, Norway
 
Applying water masses as a framework to analyze the distribution of redox active compounds in the Pacific Oxygen Deficient Zones and the subsequent implications for low oxygen concentrations across the eastern Pacific Ocean (639523)
Zachary Evans, University of Southern California, Los Angeles, United States, Elisabeth Boles, Stanford University, Civil and Environmental Engineering, Stanford, CA, United States, Jarek V Kwiecinski, Massachusetts Institute of Technology, Department of Earth, Atmospheric and Planetary Science, Cambridge, MA, United States, Susan Mullen, University of California Berkeley, Department of Earth and Planetary Science, Berkeley, CA, United States, Martin Johann Johann Wolf, Massachusetts Institute of Technology, Cambridge, MA, United States, Allan Devol, University of Washington, School of Oceanography, Seattle, WA, United States, Rintaro Moriyasu, University of Southern California, Jülich, United States, SungHyun Nam, Seoul National University, School of Earth and Environmental Sciences, Seoul, South Korea, Andrew R Babbin, Massachusetts Institute of Technology, EAPS, Cambridge, United States and James W Moffett, University of Southern California, Los Angeles, CA, United States
 
Do oceanic hypoxic regions act as barriers for sinking particles? A case study in the eastern tropical north Atlantic (643040)
Rafael Rasse, Sorbonne Universités, UPMC Université Paris 06, CNRS,Laboratoire d'Océanographie de Villefranche (LOV) UMR7093, Observatoire Océanologique, Observatoire Océanologique, Villefranche‐sur‐Mer, France and Giorgio Dall'Olmo, Plymouth Marine Laboratory, Plymouth, United Kingdom
 
Particle-Associated Biogeochemical Processes in Fayetteville Green Lake, a High Sulfur, Permanently Anoxic Lake (657896)
Ashley Brooke Cohen1, Felix Weber2, Evan Lo3 and Gordon T Taylor2, (1)Stony Brook University, Stony Brook, NY, United States, (2)Stony Brook University, School of Marine and Atmospheric Sciences, Stony Brook, NY, United States, (3)Stony Brook University, Stony Brook, United States
 
Abiotic Sulfurization of Dissolved Organic Matter within the Water Column of the Black Sea (645721)
Gonzalo V Gomez-Saez1, Thorsten Dittmar2, Anika Maria Pohlabeln1, Moritz Holtappels3,4, Anna Lichtschlag5,6, Bernhard Schnetger7, Antje Boetius6,8 and Jutta Niggemann1, (1)University of Oldenburg, ICBM-MPI Bridging Group for Marine Geochemistry, Oldenburg, Germany, (2)University of Oldenburg, Oldenburg, Germany, (3)current affiliation: Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research, Bentho-Pelagic Processes, Bremerhaven, Germany, (4)Max Planck Institute for Marine Microbiology, Department of Biogeochemistry, Bremen, Germany, (5)current affiliation: National Oceanography Centre, Geochemistry, Southampton, United Kingdom, (6)Max Planck Institute for Marine Microbiology, HGF-MPG Group for Deep Sea Ecology and Technology, Bremen, Germany, (7)University of Oldenburg, ICBM Microbiogeochemistry Research Group, Oldenburg, Germany, (8)Alfred Wegener Institute Helmholtz Center for Polar and Marine Research, HGF-MPG Group for Deep Sea Ecology and Technology, Bremerhaven, Germany
 
Comparative study of polymeric silicate formation and decomposition in pore waters of freshwater and saline areas (500874)
Jayeong Park1, Shogo Sugahara2, Yasushi Seike3 and Masahito Sugiyama1, (1)Kyoto University, Graduate School of Human and Environmental Studies, Kyoto, Japan, (2)Shimane University, Interdisciplinary Graduate School of Science and Engineering, Shimane, Japan, (3)Shimane University, Estuary Research Center, Shimane, Japan