CT31A:
Trace Metal Speciation in Seawater: Measurements, Modeling, and Impact on Marine Biogeochemistry I


Session ID#: 11310

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, Christian Schlosser, GEOMAR Helmholtz Centre for Ocean Research Kiel, Chemical Oceanography, Kiel, Germany and Eric P. Achterberg, Geomar - Hemholtz Centre for Ocean Research, Chemical Oceanography, Kiel, Germany
Moderators:  David R Turner, University of Gothenburg, Gothenburg, Sweden, Rachel Shelley, University of Western Brittany, Brest, France, Peter L Morton, National High Magnetic Field Laboratory, Geochemistry, Tallahassee, FL, United States and Sylvia Gertrud Sander, University of Otago, Dunedin, New Zealand
Student Paper Review Liaison:  Peter L Morton, National High Magnetic Field Laboratory, Geochemistry, Tallahassee, FL, United States
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:

CT31A-01
Iron-binding Ligands in the Eastern Tropical South Pacific: Results from U.S. GEOTRACES Cruise GP16 (92809)
Kristen N Buck, University of South Florida Tampa, College of Marine Science, Tampa, FL, United States, Jessica N Fitzsimmons, Texas A & M University College Station, Oceanography, College Station, TX, United States, Robert M Sherrell, Rutgers University, Marine and Coastal Sciences and Earth and Planetary Sciences, New Brunswick, NJ, United States, Bettina M Sohst, Old Dominion University, Norfolk, VA, United States, Peter Sedwick, Old Dominion University, Department of Ocean, Earth and Atmospheric Sciences, Norfolk, VA, United States and Seth John, University of South Carolina, Columbia, SC, United States
CT31A-02
Organic Complexation of Dissolved Copper and Iron from Shipboard Incubations in the Central California Current System: Investigating the Impacts of Light Conditions and Phytoplankton Growth on Iron- and Copper-Binding Ligand Characteristics (92260)
Travis Mellett1, Claire Parker2, Matthew Brown3, Tyler Coale4, Carolyn Duckham5, Dreux Chappell6, Maria Teresa Maldonado7, Kenneth W Bruland2 and Kristen N Buck8, (1)University of South Florida Tampa, College of Marine Science, St. Petersburg, FL, United States, (2)University of California Santa Cruz, Santa Cruz, CA, United States, (3)Flagler College, Natural Sciences, St Augustine, FL, United States, (4)Scripps Institution of Oceanography, La Jolla, CA, United States, (5)University of British Columbia, Vancouver, BC, Canada, (6)Old Dominion University, Ocean, Earth and Atmospheric Sciences, Norfolk, VA, United States, (7)University of British Columbia, Department of Earth, Ocean and Atmospheric Sciences, Vancouver, BC, Canada, (8)University of South Florida Tampa, College of Marine Science, Tampa, FL, United States
CT31A-03
Distinct Iron-binding Ligands in the Upper Water Column at Station ALOHA (89517)
Randelle M Bundy, Woods Hole Oceanographic Institution, Marine Chemistry and Geochemistry, Woods Hole, MA, United States, Rene Boiteau, Woods Hole Oceanographic Institution, Woods Hole, MA, United States and Daniel Repeta, Woods Hole Oceanographic Institution, Department of Marine Chemistry and Geochemistry, Woods Hole, MA, United States
CT31A-04
Identifying Marine Copper-Binding Ligands in Seawater (87850)
Hannah Whitby, University of Liverpool, School of Environmental Sciences, Liverpool, United Kingdom, James T Hollibaugh, University of Georgia, Department of Marine Sciences, Athens, GA, United States, Maria Teresa Maldonado, University of British Columbia, Department of Earth, Ocean and Atmospheric Sciences, Vancouver, BC, Canada, Sachiko Ouchi, University of British Columbia, Vancouver, BC, Canada and Stan MG van den Berg, University of Liverpool, Liverpool, L69, United Kingdom
CT31A-05
Iron binding ligands in the ocean are similar to humic substances (91156)
Stan MG van den Berg, University of Liverpool, Liverpool, L69, United Kingdom, Mahmoud Abualhaija, University of Liverpool, Liverpool, United Kingdom and Micha J.A. Rijkenberg, Royal Netherlands Institute for Sea Research, Den Burg, Netherlands
CT31A-06
Evaluation of IMAC and Electrospray Ionization Mass Spectrometry for Recovery and Analysis of Copper-Binding Ligands in Seawater (89695)
Andrew Ross, Fisheries and Oceans Canada, Institute of Ocean Sciences, Sidney, BC, Canada and Richard Liam Nixon, University of Victoria, Biochemistry and Microbiology, Victoria, BC, Canada
CT31A-07
THE MODIFICATION OF DISSOLVED ZINC DISTRIBUTIONS ALONG THE U.S. GEOTRACES WESTERN ARCTIC SECTION (89140)
Neil J Wyatt, Florida State University, Department of Earth, Ocean, and Atmospheric Science, Tallahassee, FL, United States, William M Landing, Florida State University, Earth, Ocean, and Atmospheric Science, Tallahassee, FL, United States, Jessica N Fitzsimmons, Texas A&M University, Department of Oceanography, United States, Robert M Sherrell, Rutgers Univ, Departments of Marine and Coastal Sciences and Earth and Planetary Sciences, New Brunswick, NJ, United States; Rutgers University, Department of Earth and Planetary Sciences, Piscataway, NJ, United States and Seth John, University of South Carolina, Department of Earth and Ocean Sciences, Columbia, United States
CT31A-08
Distribution of dissolved zinc in the western and central subarctic North Pacific (88143)
Taejin Kim, Hajime Obata and Toshitaka Gamo, Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, Japan
See more of: Chemical Tracers, DOM and Trace Metals