CT33A:
Trace Metal Speciation in Seawater: Measurements, Modeling, and Impact on Marine Biogeochemistry II


Session ID#: 11531

Session Description:
Global change processes, in particular ocean acidification, are changing the chemistry of seawater. The carbon dioxide system and trace metal speciation are expected to be among the chemical components of seawater most strongly affected by global change processes. The distribution and identity of organic metal complexing ligands in the marine system, and modelling of the chemical speciation using updated parameters, play an important role in understanding the changes that take place and in projecting future changes. This session builds on two SCOR working groups : WG139 which is focused on organic metal-binding ligands; and WG145 which is focused on modelling metal speciation in seawater. One aspect of metal speciation that is receiving particular attention is the bioavailability of trace metals, with extensive measurement programmes on the complexation of bioactive trace metals currently under way, in particular within the GEOTRACES program. This work is producing exciting new field data that will benefit from improved speciation modelling and additional measurements. We invite contributions on the identification, distribution and provenance of organic ligands in the marine environment, the modelling of inorganic and organic metal speciation, and linkages of trace metal speciation with ocean acidification and other factors of climate change.
Primary Chair:  David R Turner, University of Gothenburg, Gothenburg, Sweden
Chairs:  Stan MG van den Berg, University of Liverpool, Liverpool, L69, United Kingdom, Sylvia Gertrud Sander, University of Otago, Dunedin, New Zealand, Kristen N Buck, University of South Florida Tampa, College of Marine Science, Tampa, FL, United States, Rachel Shelley, University of Western Brittany, Brest, France, Peter L Morton, National High Magnetic Field Laboratory, Geochemistry, Tallahassee, FL, United States, Eric P. Achterberg, Geomar - Hemholtz Centre for Ocean Research, Chemical Oceanography, Kiel, Germany and Christian Schlosser, GEOMAR Helmholtz Centre for Ocean Research Kiel, Chemical Oceanography, Kiel, Germany
Moderators:  Eric P. Achterberg, Geomar - Hemholtz Centre for Ocean Research, Chemical Oceanography, Kiel, Germany, Kristen N Buck, University of South Florida Tampa, College of Marine Science, Tampa, FL, United States, Christian Schlosser, GEOMAR Helmholtz Centre for Ocean Research Kiel, Chemical Oceanography, Kiel, Germany and Stan MG van den Berg, University of Liverpool, Liverpool, L69, United Kingdom
Student Paper Review Liaison:  Christian Schlosser, GEOMAR Helmholtz Centre for Ocean Research Kiel, Chemical Oceanography, Kiel, Germany
Index Terms:

4807 Chemical speciation and complexation [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4835 Marine inorganic chemistry [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
Co-Sponsor(s):
  • B - Biogeochemistry and Nutrients
  • EC - Estuarine and Coastal

Abstracts Submitted to this Session:

CT33A-01
Metal Speciation Analysis and Modeling – How do we Best Estimate the Bioavailable Form (90521)
Sylvia Gertrud Sander, University of Otago, Dunedin, New Zealand, Kristen N Buck, University of South Florida Tampa, College of Marine Science, Tampa, FL, United States, Maeve Carroll Lohan, National Oceanography Centre, Southampton, United Kingdom, David R Turner, University of Gothenburg, Gothenburg, Sweden and Simon L Clegg, University of East Anglia, Norwich, United Kingdom
CT33A-02
Increasing the Accuracy of pH Measurements in Estuarine and Brackish Water: the Need for an Improved Pitzer Model for TRIS in Seawater (91373)
David R Turner and Julián Gallego, University of Gothenburg, Gothenburg, Sweden
CT33A-03
The nature of soluble Mn(III) in oxygenated surface waters and in future oceanic O2 regimes (87648)
Veronique Oldham, University of Delaware, Oceonography, Lewes, DE, United States, Alfonso Mucci, McGill University, Department of Earth and Planetary Sciences, Montreal, QC, Canada, George W Luther III, University of Delaware, College of Earth, Ocean and Environment, Lewes, DE, United States, Kristen E Burk, University of Miami, Laramie Jensen, Texas A&M and Megan T Miller, Georgia Institute of Technology
CT33A-04
Continuous, Rapid Scavenging of Thorium and Protactinium During Westward Advection of the East Pacific Rise Hydrothermal Plume (89504)
Frank J Pavia1,2, Robert F Anderson1,2, Sebastian M. Vivancos1,2, Martin Q Fleisher1, Yanbin Lu3, Pu Zhang3, Hai Cheng4,5 and R. Lawrence Edwards3, (1)Lamont -Doherty Earth Observatory, Palisades, NY, United States, (2)Columbia University of New York, Palisades, NY, United States, (3)University of Minnesota, Minneapolis, MN, United States, (4)Xi'an Jiaotong University, Institute of Global Environmental Change, Xian, China, (5)University of Minnesota, Department of Earth and Environmental Sciences, Minneapolis, United States
CT33A-05
Partitioning of Dissolved Metals (Fe, Mn, Cu, Cd, Zn, Ni, and Pb) into Soluble and Colloidal Fractions in Continental Shelf and Offshore Waters, Northern California (89725)
Jessica N Fitzsimmons, Texas A & M University College Station, Oceanography, College Station, TX, United States, Claire Parker, University of California Santa Cruz, Santa Cruz, CA, United States and Robert M Sherrell, Rutgers University, Marine and Coastal Sciences and Earth and Planetary Sciences, New Brunswick, NJ, United States
CT33A-07
PROGNOSTIC MODELLING OF IRON-BINDING LIGANDS IN A GLOBAL BIOGEOCHEMICAL MODEL AND ITS EFFECT ON IRON DISTRIBUTION (89829)
Ying Ye, Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany, Christoph D Voelker, Alfred Wegener Institute, Helmholtz-Center for Polar and Marine Research Bremerhaven, Bremerhaven, Germany and Alessandro Tagliabue, University of Liverpool, Earth, Ocean and Ecological Sciences, Liverpool, L69, United Kingdom
CT33A-08
Ligand-Iron Dynamics and their Influence on Dissolved Iron Distributions in a Global Model (92375)
Elliot Sherman, University of California Irvine, Irvine, CA, United States and Jefferson Keith Moore, University of California Irvine, Department of Earth System Science, Irvine, CA, United States
See more of: Chemical Tracers, DOM and Trace Metals