CT21A:
The Role of Particles in the Cycling of Trace Elements and Their Isotopes in the Ocean I

Submit an Abstract to this Session

Session ID#: 11302

Session Description:
A number of trace metals are thought to control marine ecosystem features and biological productivity. While trace elements in the dissolved phase have been the focus of many investigations, we are still largely ignorant of the large scale distribution of particulate trace elements and their size partitioning and chemical composition. The GEOTRACES program, which aims to provide a comprehensive view of the distribution of trace elements and their isotopes (TEIs) in the world's oceans, is providing new insights on these aspects. Furthermore, there is a crucial need to understand the exchange mechanisms between particulate and dissolved pools, including adsorption, desorption, aggregation, precipitation, biological uptake and remineralization processes.  This session seeks to bring together scientists interested in better constraining the role of ocean particles in the biogeochemical cycles of TEIs, in different oceanic environments, such as the continental shelves and slopes, the nepheloid layers, or the particle-poor regions of the open ocean. We invite abstracts on all aspects of oceanic particulate TEIs, through experimental, in situ and modeling approaches.
Primary Chair:  Hélène Planquette, IUEM Institut Universitaire Européen de la Mer, LEMAR (CNRS, Univ Brest, IRD, Ifremer), Plouzané, France
Chairs:  Phoebe J Lam, University of California Santa Cruz, Department of Ocean Sciences, Santa Cruz, United States, Benjamin S Twining, Bigelow Laboratory for Ocean Sciences, East Boothbay, United States and Hélène Planquette, LEMAR, UMR 6539, Plouzané, France
Moderators:  Hélène Planquette, LEMAR, UMR 6539, Plouzané, France, Phoebe J Lam, University of California Santa Cruz, Department of Ocean Sciences, Santa Cruz, United States and Benjamin S Twining, Bigelow Laboratory for Ocean Sciences, East Boothbay, United States
Student Paper Review Liaison:  Hélène Planquette, LEMAR, UMR 6539, Plouzané, France
Index Terms:

4211 Benthic boundary layers [OCEANOGRAPHY: GENERAL]
4805 Biogeochemical cycles, processes, and modeling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4808 Chemical tracers [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4875 Trace elements [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
Co-Sponsor(s):
  • B - Biogeochemistry and Nutrients
  • HE - High Latitude Environments
  • ME - Marine Ecosystems
  • PC - Past, Present and Future Climate

Abstracts Submitted to this Session:

CT21A-01
Characterization of Mercury Particle Flux Using 238U:234Th Disequilibria in the North Pacific Subtropical Gyre (91591)
Blaire Umhau1, Laura C Motta2, Claudia R Benitez-Nelson3, Hilary G Close4,5, Cecelia C Hannides6,7, Brian N Popp8, Joel D Blum2, Jeffrey Drazen6 and Kalina Cozette Grabb9, (1)Sea Education Association, Woods Hole, MA, United States, (2)University of Michigan, Earth and Environmental Sciences, Ann Arbor, MI, United States, (3)University of South Carolina, Department of Earth and Ocean Sciences, Columbia, SC, United States, (4)U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, CA, United States, (5)University of California Santa Cruz, Institute of Marine Sciences, Santa Cruz, CA, United States, (6)University of Hawaii, Oceanography, Honolulu, HI, United States, (7)University of Hawaii at Manoa, Department of Earth Sciences, Honolulu, HI, United States, (8)University of Hawaiʻi at Mānoa, Department of Earth Sciences, Honolulu, United States, (9)Dalhousie University, Department of Oceanography, Halifax, Canada
CT21A-02
Adsorption of Thorium-234 onto particles differing in surface area and surface quality (89586)
Anne Schuster and Gerhard Graf, University of Rostock, Marine Biology, Rostock, Germany
CT21A-03
Contrasting Boundary Scavenging in two Eastern Boundary Current Regimes (88830)
Robert F Anderson1, Martin Q Fleisher1, Frank J Pavia2, Sebastian M Vivancos3, Yanbin Lu4, Pu Zhang5, Hai Cheng6 and R. Lawrence Edwards4, (1)Lamont-Doherty Earth Observatory, Palisades, NY, United States, (2)Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, United States, (3)Columbia University, Department of Earth and Environmental Sciences, New York, NY, United States, (4)University of Minnesota, Minneapolis, MN, United States, (5)University of Minnesota, Department of Earth Sciences, Minneapolis, MN, United States, (6)Xi'an Jiaotong University, Institute of Global Environmental Change, Xian, China
CT21A-04
A Decadal Record of Elemental Composition of the Particle Flux in the Deep Sargasso Sea (93426)
Maureen H Conte1, Alice M Carter2, David Koweek3 and John C Weber2, (1)Bermuda Institute of Ocean Sciences, St.George's, GE, Bermuda, (2)Marine Biological Laboratory, Woods Hole, MA, United States, (3)Stanford University, Stanford, CA, United States
CT21A-05
Fe Isotope Fractionation Across the Oxic – Ferruginous Redox Transition (91088)
Michael Staubwasser, University of Cologne, Cologne, Germany and Susann Henkel, Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Bremerhaven, Germany
CT21A-06
Contribution of Resuspended Sediments to the Dissolved Trace Metal Pool (Fe, Mn): An Experimental Study (89037)
Marie Cheize1, Hélène Planquette1, Jessica N Fitzsimmons2, Robert M Sherrell3, Ewan Pelleter4, Christophe Lambert1, Geraldine Sarthou1, Julia Boutorh1, Eva Bucciarelli5, Manon Le Goff1, Céline Liorzou6, Sandrine Chéron7 and Nicolas Gayet8, (1)LEMAR, UMR 6539, Plouzané, France, (2)Texas A&M University, Department of Oceanography, College Station, TX, United States, (3)Rutgers University, Department of Marine and Coastal Sciences and Department of Earth and Planetary Sciences, Piscataway, United States, (4)IFREMER, Department of Marine Geosciences, Plouzané, France, (5)IUEM Institut Universitaire Européen de la Mer, LEMAR, Plouzané, France, (6)LDO, UMR 6538, Plouzané, France, (7)Ifremer, centre de Brest, LGM, Plouzané, France, (8)Ifremer, centre de Brest, LEP, Plouzané, France
CT21A-07
On the role of Lithogenic Particles for Iron Cycling in the Atlantic Ocean (90922)
Christoph D Voelker, Alfred Wegener Institute (AWI), Helmholtz Center for Polar and Marine Research, Bremerhaven, Germany and Ying Ye, Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany
CT21A-08
Particle Cycling in the Ocean based on Titanium and Particle Concentration Data from the US GEOTRACES North Atlantic Transect (89987)
Jong-mi Lee, University of California Santa Cruz, Ocean Sciences Department, Santa Cruz, CA, United States, Phoebe J Lam, University of California Santa Cruz, Department of Ocean Sciences, Santa Cruz, United States and Daniel C. Ohnemus, Skidaway Institute of Oceanography, UGA Dept. of Marine Sciences, Savannah, United States
See more of: Chemical Tracers, DOM and Trace Metals