CT34B:
Controls on Trace Metal Biogeochemistry and Physicochemical Speciation in Seawater IV Posters
Session ID#: 85790
Session Description:
Trace metals function as essential micronutrients and pollutants in the ocean. Organic complexation, size partitioning, and redox changes of trace elements can be mediated by biological processes including uptake, regeneration, cell lysis, and organic ligand production. Additional processes influencing the production, degradation, and composition of organic matter also play an important role in controlling trace metal distributions, and both vary across environments (e.g. estuaries, open ocean, air-sea-sediment interfaces, hydrothermal systems). In turn, resulting changes in bioavailability and cycling of trace elements governs the function and composition of marine phytoplankton communities. Recent efforts, particularly within GEOTRACES, have expanded the database of trace metal concentrations and physicochemical speciation. This session seeks to link our understanding of biology, organic matter, and trace metal chemistry from molecular to basin-wide scales, from studies related to biologically-mediated transformations of trace elements to the wider processes controlling metal distributions, size partitioning, and fluxes. We welcome submissions highlighting how marine organisms influence the physicochemical speciation of trace elements in seawater, and how changes in trace element chemistry impact the structure and function of marine ecosystems. In addition to observational, experimental and modelling studies, we also invite contributions on the production, degradation, and characterization of metal-binding compounds and colloids.
Co-Sponsor(s):
Primary Chair: Hannah Whitby, University of Liverpool, United Kingdom
Co-chairs: Randelle M Bundy, University of Washington Seattle Campus, School of Oceanography, Seattle, United States, Jessica N Fitzsimmons, Texas A & M University, Department of Oceanography, College Station, United States and Andrea Koschinsky, Jacobs University Bremen, Department of Physics and Earth Sciences, Bremen, Germany
Primary Liaison: Hannah Whitby, University of Liverpool, United Kingdom
Moderators: Emily Estes, University of Delaware, Newark and Veronique Oldham, University of Delaware, College of Earth, Ocean, and Environment, Lewes, United States
Student Paper Review Liaisons: Randelle M Bundy, University of Washington Seattle Campus, School of Oceanography, Seattle, United States and Emily Estes, University of Delaware, Newark
Abstracts Submitted to this Session:
Iron sources and cycling in the Peruvian oxygen minimum zone assessed using iron isotopes (652643)
Insa Rapp1,2, Matthias Sieber3, Florian Scholz4, Mark James Hopwood4, Tim M Conway5, Ruifang C. Xie4, Martin Frank4, Derek Vance3 and Eric P Achterberg4, (1)GEOMAR Helmholtz Centre for Ocean Research Kiel, Chemical Oceanography, Kiel, Germany, (2)Dalhousie University, Department of Biology, Halifax, NS, Canada, (3)ETH Swiss Federal Institute of Technology Zurich, Earth Sciences, Zurich, Switzerland, (4)GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany, (5)University of South Florida, College of Marine Science, St. Petersburg, United States
Predicting Iron(III) Speciation in the Peruvian Upwelling Region (652536)
Kechen Zhu1, Martha Gledhill1, Mark James Hopwood1, Jan E. Groenenberg2, Anja Engel1 and Eric P Achterberg1, (1)GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany, (2)Wageningen University, section soil quality, Wageningen, Netherlands
A novel competitive ligand equilibration-cathodic stripping voltammetry (CLE-CSV) procedure for the fast and ultrasensitive iron speciation in seawater with tenfold sample size reduction (647425)
Francesca Sanvito, Università degli Studi dell'Insubria, Dipartimento di Scienza e Alta Tecnologia, 22100 Como, Italy, Luis M. Laglera, University of the Balearic Islands, Departamento de Química, 07122 Palma, Spain and Damiano Monticelli, Università degli Studi dell'Insubria, Dipartimento di Scienza ed Alta Tecnologia, 22100 Como, Italy
Spatial Variations of Siderophores in the North Pacific Ocean (649100)
Ji Woon Park1, Nicholas Hawco2, Paulina Pinedo-Gonzalez3, Seth John4, Francois Ribalet5, E. Virginia Armbrust6 and Randelle M Bundy1, (1)University of Washington Seattle Campus, School of Oceanography, Seattle, United States, (2)University of Southern California, Earth Sciences, Los Angeles, CA, United States, (3)Lamont -Doherty Earth Observatory, Palisades, NY, United States, (4)University of Southern California, Department of Earth Sciences, Los Angeles, United States, (5)University of Washington, School of Oceanography, Seattle, WA, United States, (6)University of Washington, School of Oceanography, Seattle, United States
Distributions of natural organic Fe-binding ligands in the eastern and western subarctic Pacific (644536)
Yoshiko Kondo1, Yudai Sunahara1, Jun Nishioka2, Hajime Obata3 and Shigenobu Takeda1, (1)Nagasaki University, Nagasaki, Japan, (2)Hokkaido University, Institute of Low Temperature Science, Sapporo, Japan, (3)The University of Tokyo, Atmosphere and Ocean Research Institute, Kashiwa, Japan
Investigating seasonal trends in dissolved iron-binding organic ligands in the BATS region of the North Atlantic Ocean (648945)
Salvatore Caprara1, Bettina M Sohst2, Rodney Johnson3, Daniel C Ohnemus4, Alessandro Tagliabue5, Benjamin S Twining6, Peter Sedwick2 and Kristen N Buck7, (1)University of South Florida, College of Marine Science, Saint Petersburg, FL, United States, (2)Old Dominion University, Department of Ocean, Earth and Atmospheric Sciences, Norfolk, VA, United States, (3)Bermuda Institute of Ocean Sciences, St George's, Bermuda, (4)Skidaway Institute of Oceanography, Savannah, United States, (5)University of Liverpool, Earth, Ocean and Ecological Sciences, Liverpool, L69, United Kingdom, (6)Bigelow Lab for Ocean Sciences, East Boothbay, ME, United States, (7)Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, United States
Fe(II) biogeochemistry in a changing ocean (634868)
J. Magdalena Santana-Casiano1, Melchor González-Dávila1, Aridane G. González1, Noma Pérez-Almeida1, Guillermo Samperio-Ramos1, Carolina Santana-González1, David González-Santana2 and Maria Luisa Arreguin1, (1)IOCAG. Universidad de Las Palmas de Gran Canaria, Las Palmas de Gran Canaria, Spain, (2)Universidad de Las Palmas de Gran Canaria, ULPGC · Instituto Universitario de Oceanografía y Cambio Global, Brest, France
Glacial and hydrothermal sources of dissolved iron(II) in Southern Ocean waters surrounding Heard and McDonald Islands (655974)
Thomas Holmes1,2, Kathrin Wuttig3, Zanna Chase4, Christina Schallenberg5, Pier van der Merwe6, Ashley Townsend7 and Andrew R Bowie4, (1)Institute for Marine and Antarctic Studies, Hobart, TAS, Australia, (2)Antarctic Climate and Ecosystems Cooperative Research Centre (ACE CRC), Hobart, Australia, (3)Antarctic Climate & Ecosystems Cooperative Research Centre (ACE CRC), University of Tasmania, Hobart, TAS, Australia, (4)University of Tasmania, Institute for Marine and Antarctic Studies, Hobart, TAS, Australia, (5)CSIRO, Environment, Hobart, TAS, Australia, (6)Antarctic Gateway Partnership, University of Tasmania, Hobart, Australia, (7)University of Tasmania, Central Science Laboratory, Hobart, TAS, Australia
Iron-rich Plumes from Erupting Submarine Volcanoes (657736)
Joseph A Resing1,2, Nathaniel J Buck1,3, Sharon L Walker4, Tamara Baumberger5,6, Edward T Baker7, John E Lupton8 and David A Butterfield3, (1)Joint Institute for the Study of the Atmosphere and Ocean, and NOAA/PMEL, Seattle, WA, United States, (2)NOAA Pacific Marine Environmental Laboratory, Seattle, United States, (3)University of Washington, Cooperative Institute for Climate, Ocean & Ecosystem Studies, Seattle, United States, (4)NOAA/PMEL, Seattle, United States, (5)Oregon State University, Corvallis, United States, (6)NOAA/PMEL & Oregon State University, Newport, United States, (7)NOAA Pacific Marine Environmental Laboratory, Seattle, WA, United States, (8)NOAA/PMEL, Newport, OR, United States
Estimates of chemical fluxes from Daikoku Seamount - a shallow, erupting, submarine volcano on the Mariana Arc. (654513)
Nathaniel J Buck, Joint Institute for the Study of the Atmosphere and Ocean, and NOAA/PMEL, Seattle, WA, United States, Joseph Resing, Cooperative Institute for Climate, Ocean, and Ecosystem Studies, University of Washington, Seattle, United States, Tamara Baumberger, Oregon State University, Corvallis, United States; NOAA/PMEL & Oregon State University, Newport, United States, David A Butterfield, University of Washington, Cooperative Institute for Climate, Ocean & Ecosystem Studies, Seattle, United States, Edward T Baker, NOAA Pacific Marine Environmental Laboratory, Seattle, WA, United States, Sharon L Walker, NOAA/PMEL, Seattle, United States and Camilla Maya Wilkinson, Oregon State University, CIMRS, Newport, OR, United States
Role of Colloids in Controlling Mobilization and Transport of Trace Metals during the Formation of Deep Sea Sediment Plumes (655216)
Katja Schmidt, German Federal Institute for Geosciences and Natural Resources, Hannover, Germany, Timo Brengelmann, University of Oldenburg, Oldenburg, Germany, Sophie Paul, Jacobs University Bremen, Department of Physics and Earth Sciences, Bremen, Germany and Eric P Achterberg, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
Exploring Organic Metal-binding Ligands at the Lost City Hydrothermal Field (649453)
Shelby Gunnells1, Colleen Lynn Hoffman2, Maeve C Lohan3, Alessandro Tagliabue4, Alastair J.M. Lough3, Joseph Resing5, Susan Q Lang6 and Randelle M Bundy2, (1)North Dakota State University Main Campus, Geosciences, Fargo, ND, United States, (2)University of Washington Seattle Campus, School of Oceanography, Seattle, United States, (3)University of Southampton, Ocean and Earth Sciences, National Oceanography Centre, Southampton, United Kingdom, (4)University of Liverpool, Department of Earth, Ocean and Ecological Sciences, Liverpool, L69, United Kingdom, (5)Cooperative Institute for Climate, Ocean, and Ecosystem Studies, University of Washington, Seattle, United States, (6)University of South Carolina, Earth and Ocean Sciences, Columbia, United States
The transport of metal-binding humic substances and dissolved iron from a hydrothermal vent site (TAG, North Atlantic) (650165)
Hannah Whitby1, David Gonzalez Santana2, Marie Cheize3, Arthur Gourain4, Thomas Holmes5, Yoan Germain6, Cecile Cathalot7, Ewan Pelleter8, Yves Fouquet9, Geraldine Sarthou10 and Hélène Planquette10, (1)University of Liverpool, United Kingdom, (2)Institut Universitaire Européen de la Mer, Université de Bretagne-Occidentale, Plouzané, France, (3)LEMAR, Institut Universitaire Européen de la Mer, Brest, France, (4)University of Liverpool, Earth Ocean & Ecological Sciences, Liverpool, United Kingdom, (5)University of Washington Seattle Campus, School of Oceanography, Seattle, WA, United States, (6)Geo-Ocean, Univ Brest, CNRS, Ifremer, UMR6538, Plouzané, France, (7)Geo-ocean, Univ Brest, CNRS, Ifremer, UMR6538, Plouzané, France, (8)IFREMER, Department of Marine Geosciences, Plouzané, France, (9)IFREMER, Plouzané, France, (10)IUEM Institut Universitaire Européen de la Mer, LEMAR, CNRS, Plouzané, France
Coastal Contamination by Mining Tailings: Unusual Minor Role of Humic Substances to Soluble and Dissolved Iron Distribution (645649)
Cybelle Menolli Longhini1, Léo Mahieu2, Fabian Sá1, Stan MG van den Berg3, Pascal Salaun4 and Renato Neto1, (1)UFES Federal University of Espírito Santo, Department of Oceanography and Ecology, Vitoria, Brazil, (2)University of Liverpool, Liverpool, United Kingdom, (3)Univ Liverpool, Liverpool, United Kingdom, (4)University of Liverpool, Earth, Ocean and Ecological Sciences, Liverpool, United Kingdom
