CT13A:
Abiotic and Biotic Retention, Recycling, and Remineralization of Metals in the Ocean I


Session ID#: 37168

Session Description:
Trace metals shape both the biogeochemical functioning and the biological structure of oceanic provinces, and considerable insight into trace metal distributions have been gleaned from international programs like GEOTRACES. To date, observational and modelling efforts have mainly focused on modes of external metal supply from different sources. While this has yielded important advances, we also know that metals undergo key internal transformations such as biotic uptake, scavenging, recycling, and remineralization. These internal transformations play crucial roles in shaping the biogeochemical cycling of metals by governing their bioavailability, oceanic distributions, and residence times. In this session we solicit presentations that address key questions regarding the abiotic and biotic processes regulating (i) the retention timescale for metals in the upper ocean, (ii) surface ocean metal recycling and bioavailability, (iii) the subsurface regeneration length scales for metals in the ocean interior, and (iv) the role of mineral versus organic characteristics of sinking particles on metal scavenging. We also seek presentations that provide insights into how these key questions are mediated by differing physico-chemical and microbial processes in contrasting ocean settings. Presentations showing insights from the diverse standpoints of biogeochemical oceanography and molecular ecology, from both observational and modelling perspectives, are strongly encouraged.
Primary Chair:  Philip W Boyd, University of Tasmania, Institute for Marine and Antarctic Studies, Hobart, TAS, Australia
Co-chairs:  Kristen N Buck, University of South Florida Tampa, College of Marine Science, Tampa, FL, United States; University of South Florida, College of Marine Science, St. Petersburg, FL, United States, Jessica N Fitzsimmons, Texas A&M University, Department of Oceanography, United States and Alessandro Tagliabue, University of Liverpool, Earth, Ocean and Ecological Sciences, Liverpool, L69, United Kingdom
Moderators:  Jessica N Fitzsimmons, Texas A&M University, Department of Oceanography, United States, Kristen N Buck, University of South Florida, St, Bermuda and Alessandro Tagliabue, University of Liverpool, Earth, Ocean and Ecological Sciences, Liverpool, L69, United Kingdom
Student Paper Review Liaison:  Jessica N Fitzsimmons, Texas A&M University, Department of Oceanography, United States
Index Terms:

4805 Biogeochemical cycles, processes, and modeling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4807 Chemical speciation and complexation [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4840 Microbiology and microbial ecology [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4875 Trace elements [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
Cross-Topics:
  • BN - Biogeochemistry and Nutrients
  • MM - Microbiology and Molecular Ecology
  • OM - Ocean Modeling

Abstracts Submitted to this Session:

The role of remineralisation and scavenging in shaping the vertical profiles of iron in the Atlantic Ocean (319402)
Anna Pagnone, Ying Ye and Christoph D Voelker, Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany
Visualizing Latent Particulate Phases and Differential Metal Remineralization in the GEOTRACES Era (322585)
Daniel Ohnemus and Benjamin S Twining, Bigelow Lab for Ocean Sciences, East Boothbay, ME, United States
Quantifying the internal cycling of iron in the ocean from basin scale sections, process studies and numerical models (310209)
Alessandro Tagliabue, University of Liverpool, Earth, Ocean and Ecological Sciences, Liverpool, L69, United Kingdom, Andrew R Bowie, Antarctic Climate and Ecosystems Cooperative Research Centre (ACE CRC), Hobart, Australia, Michael Joseph Ellwood, Australian National University, Research School of Earth Sciences, Canberra, ACT, Australia, William M Landing, Florida State University, Earth, Ocean, and Atmospheric Science, Tallahassee, FL, United States, Angela Milne, University of Plymouth, Plymouth, United Kingdom, Benjamin S Twining, Bigelow Lab for Ocean Sciences, East Boothbay, ME, United States and Philip W Boyd, University of Tasmania, Antarctic Climate and Ecosystems Collaborative Research Centre, Hobart, Australia
Dissolved Fe and Mn along US Arctic GEOTRACES GN01: Effects of scavenging in intermediate and deep waters (325574)
Laramie Jensen1, Jay T. Cullen2, Graham T Ball2, Robert M Sherrell3 and Jessica N Fitzsimmons4, (1)Texas A&M University College Station, Oceanography, College Station, TX, United States, (2)University of Victoria, School of Earth and Ocean Sciences, Victoria, BC, Canada, (3)Rutgers University, Marine and Coastal Sciences and Earth and Planetary Sciences, New Brunswick, NJ, United States, (4)Texas A&M University, Oceanography, College Station, TX, United States
Authigenic and Biogenic Controls on Metal Isotope Fractionation in the Southern Ocean (326643)
Tristan J Horner, Woods Hole Oceanographic Institution, Marine Chemistry & Geochemistry, Woods Hole, MA, United States, Christopher William Kinsley, Massachusetts Institute of Technology, Cambridge, MA, United States, Sune Nielsen, Woods Hole Oceanographic Institute, Woods Hole, MA, United States and Phoebe J Lam, University of California Santa Cruz, Department of Ocean Sciences, Santa Cruz, CA, United States
Mesopelagic Iron Remineralization Patterns in High-Latitude, Low-Iron and Low-Latitude, High-Iron Oceanic Regions (306274)
Matthieu Bressac1,2, Michael Joseph Ellwood3, Marion Fourquez2,4, Pere Masque5,6, Viena Puigcorbé5,7, Stéphanie Jacquet8, Peter G Strutton2,9, Thomas W Trull4,10, Thibaut Wagener8, Cecile Guieu11 and Philip W Boyd2,4, (1)Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, Australia, (2)University of Tasmania, Institute for Marine and Antarctic Studies (IMAS), Hobart, Australia, (3)Australian National University, Research School of Earth Sciences, Canberra, ACT, Australia, (4)University of Tasmania, Antarctic Climate and Ecosystems Collaborative Research Centre, Hobart, Australia, (5)School of Science, Centre for Marine Ecosystems Research, Edith Cowan University, Joondalup, Australia, (6)University of Western Australia, School of Physics Oceans Institute, Crawley, Australia, (7)The University of Western Australia Oceans Institute, University of Western Australia, Crawley, Australia, (8)Université d’Aix-Marseille, CNRS/INSU, IRD, Institut Méditerranéen d’Océanologie, Marseille, France, (9)University of Tasmania, Australian Research Council Centre of Excellence for Climate System Science, Hobart, Australia, (10)CSIRO Marine and Atmospheric Research Hobart, Hobart, Australia, (11)Sorbonne Universités, Université Pierre et Marie Curie, Observatoire Océanologique de Villefranche, Laboratoire d'Océanographie de Villefranche-sur-Mer, Villefranche-sur-Mer, France
Sinking flux profiles of carbon and trace elements in the North Atlantic Ocean constrained by multiple radionuclide systems (309399)
Christopher T Hayes1, Erin E Black2, Frank J Pavia3, Robert F Anderson4, Mark M Baskaran5, Ken Buesseler2, Matthew A Charette2, Patrick Fitzgerald6 and J. Kirk Cochran6, (1)University of Southern Mississippi, School of Ocean Science and Engineering, Stennis Space Center, MS, United States, (2)Woods Hole Oceanographic Institution, Woods Hole, MA, United States, (3)Columbia University, Department of Earth and Environmental Sciences, New York, NY, United States, (4)Columbia University & Lamont-Doherty Earth Observatory, Palisades, NY, United States, (5)Wayne State University, Detroit, MI, United States, (6)Stony Brook University, Stony Brook, NY, United States
How Far can Iron Chemistry Explain Bioavailability in the Southern Ocean? (308884)
Sonia Blanco Ameijeiras, Damien J. E. Cabanes and Christel S. Hassler, Department F.-A. Forel for Environmental and Aquatic Sciences, University of Geneva, Switzerland, Geneva, Switzerland

See more of: Chemical Tracers, Organic Matter and Trace Elements