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, United States, Jessica N Fitzsimmons, Texas A&M University, Department of Oceanography, College Station, TX, United States and Alessandro Tagliabue, University of Liverpool, Department of Earth, Ocean and Ecological Sciences, Liverpool, United Kingdom
Moderators:  Jessica N Fitzsimmons, Texas A&M University, Department of Oceanography, College Station, TX, United States, Kristen N Buck, Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, United States and Alessandro Tagliabue, University of Liverpool, Department of Earth, Ocean and Ecological Sciences, Liverpool, United Kingdom
Student Paper Review Liaison:  Jessica N Fitzsimmons, Texas A&M University, Department of Oceanography, College Station, TX, 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 C. Ohnemus, Skidaway Institute of Oceanography, UGA Dept. of Marine Sciences, Savannah, United States and Benjamin S Twining, Bigelow Laboratory for Ocean Sciences, East Boothbay, 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, Department of Earth, Ocean and Ecological Sciences, Liverpool, United Kingdom, Prof. Andrew R Bowie, University of Tasmania, Institute for Marine and Antarctic Studies, Hobart, TAS, 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 Laboratory for Ocean Sciences, East Boothbay, United States and Philip W Boyd, Antarctic Climate & Ecosystems Collaborative Research Centre (ACE CRC), Univesity of Tasmania, Hobart, TAS, 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, United States
Authigenic and Biogenic Controls on Metal Isotope Fractionation in the Southern Ocean (326643)
Tristan J Horner, Department of Marine Chemistry & Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, United States, Christopher William Kinsley, Massachusetts Institute of Technology, Earth, Atmospheric and Planetary Sciences, Cambridge, United States, Sune Nielsen, Woods Hole Oceanographic Institution, Geology & Geophysics, Woods Hole, United States and Phoebe J Lam, University of California Santa Cruz, Department of Ocean Sciences, Santa Cruz, 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 Fourquez4,5, Pere Masque6,7, Viena Puigcorbé8,9, Stéphanie Jacquet10, Peter G Strutton11,12, Thomas W Trull5,13, Thibaut Wagener10, Cecile Guieu14 and Philip W Boyd11,15, (1)Laboratoire d'Océanographie de Villefranche, Institut de la Mer de Villefranche, Villefranche-sur-Mer, France, (2)University of Tasmania, Institute for Marine and Antarctic Studies (IMAS), Hobart, TAS, Australia, (3)Australian National University, Research School of Earth Sciences, Canberra, ACT, Australia, (4)Mediterranean Institute of Oceanography, Marseille Cedex 09, France, (5)University of Tasmania, Antarctic Climate and Ecosystems Collaborative Research Centre, Hobart, Australia, (6)School of Science, Edith Cowan University, Joondalup, Western Australia, Australia, (7)International Atomic Energy, Monaco, Monaco, (8)School of Science, Centre for Marine Ecosystems Research, Edith Cowan University, Joondalup, Australia, (9)Institut de Ciències del Mar - CSIC, Barcelona, Spain, (10)Université d’Aix-Marseille, CNRS/INSU, IRD, Institut Méditerranéen d’Océanologie, Marseille, France, (11)University of Tasmania, Institute for Marine and Antarctic Studies, Hobart, TAS, Australia, (12)Australian Research Council Centre of Excellence for Climate Extremes, Hobart, TAS, Australia, (13)CSIRO Marine and Atmospheric Research Hobart, Hobart, Australia, (14)Sorbonne Universités, Université Pierre et Marie Curie, Observatoire Océanologique de Villefranche, Laboratoire d'Océanographie de Villefranche-sur-Mer, Villefranche-sur-Mer, France, (15)Antarctic Climate & Ecosystems Collaborative Research Centre (ACE CRC), Univesity of Tasmania, Hobart, TAS, Australia
Sinking flux profiles of carbon and trace elements in the North Atlantic Ocean constrained by multiple radionuclide systems (309399)
Christopher T Hayes, University of Southern Mississippi, Stennis Space Center, United States, Erin E Black, Dalhousie University, Halifax, NS, Canada, Frank J Pavia, Columbia University, Department of Earth and Environmental Sciences, New York, NY, United States, Robert F Anderson, Columbia University & Lamont-Doherty Earth Observatory, Palisades, NY, United States, Mark M Baskaran, Wayne State University, Geology, Detroit, MI, United States, Ken Buesseler, Woods Hole Oceanographic Institution, Department of Marine Chemistry & Geochemistry, Woods Hole, MA, United States, Matthew A Charette, Woods Hole Oceanographic Institution, Marine Chemistry & Geochemistry, Woods Hole, United States, Patrick Fitzgerald, Stony Brook University, Stony Brook, NY, United States and J. Kirk Cochran, Stony Brook University, School of Marine and Atmospheric Sciences, Stony Brook, United States
How Far can Iron Chemistry Explain Bioavailability in the Southern Ocean? (308884)
Sonia Blanco Ameijeiras, Damien J. E. Cabanes and Christel 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