Biogeochemical processes that affect the cycling of trace elements and their isotopes, as well as carbon, macronutrients and other constituents, are studied using two basic field strategies: sampling at a fixed station or regime to measure rates and examine specific processes, or transects on up to basin scales. Each has its strengths and weaknesses, but transects can gather a broad sweep of information on a relatively short time scale that can then be used to develop a more specific process-oriented approach. Indeed, the GEOSECS program of the 1970’s used the transect approach, and currently the GO-SHIP/Repeat Hydrography and international GEOTRACES programs feature long ocean transects. This session will highlight biogeochemical processes revealed on basin transects that affect trace constituents such as trace elements and isotopes, as well as organic constituents, including carbon and macronutrients. It will also focus on sampling and data analysis methods applied to sampling across basins, and biogeochemical modeling studies that integrate data from long transects into their analyses.
Primary Chair: Gregory A Cutter, Old Dominion University, Ocean, Earth and Atmospheric Sciences, Norfolk, VA, United States
Co-chairs: Phoebe J Lam, University of California Santa Cruz, Department of Ocean Sciences, Santa Cruz, CA, United States, Karen L Casciotti, Stanford University, Earth System Science, Stanford, United States and Rob Middag, NIOZ Royal Netherlands Institute for Sea Research, and Utrecht University, OCS, Den Burg, Netherlands
Primary Liaison: Gregory A Cutter, Old Dominion University, Norfolk, VA, United States
Moderators: Gregory A Cutter, Old Dominion University, Norfolk, VA, United States and Rob Middag, NIOZ Royal Netherlands Institute for Sea Research, and Utrecht University, OCS, Den Burg, Netherlands
Student Paper Review Liaison: Gregory A Cutter, Old Dominion University, Norfolk, VA, United States
Variations in Salinity and Oxygen Isotopes in the Southern Indian Ocean (657168)
Haley Courser, California State University Sacramento, Sacramento, CA, United States, Nicholas Waring, California State University Sacramento, Geology, Sacramento, CA, United States, Amy J Wagner, California State University Sacramento, Geology Department, Sacramento, CA, United States, Elisabeth L Sikes, Rutgers University, Piscataway, United States, Thomas Williams, British Antarctic Survey, Cambridge, United Kingdom and Sujata A Murty, Organization Not Listed, Washington, United States
Dissolved Organic Phosphorus (DOP) Distributions in the Eastern Indian Ocean and Subtropical South Pacific Ocean (643549)
Zhou Liang, Florida State University, department of earth, ocean & atmospheric science, Tallahassee, FL, United States, Robert T Letscher, University of New Hampshire, Earth Sciences, Durham, NH, United States, Kelly McCabe, University of South Carolina, School of the Earth, Ocean, and Environment, Columbia, SC, United States, Dario Marconi, Princeton University, Department of Geosciences, Princeton, NJ, United States, Daniel Mikhail Sigman, Princeton University, Geosciences, Princeton, United States and Angela N Knapp, Florida State University, Tallahassee, FL, United States
Autonomous Optics of the Ocean Biological Carbon Pump: PIC and particle birefringence along the GEOTRACES GP15 transect. (655681)
James K B Bishop1, Vinicius Jose Amaral2, Phoebe J Lam2, Cristina Orrico3, Todd Wood4 and Thorsten Stezelberger5, (1)University of California Berkeley, Berkeley, CA, United States, (2)University of California Santa Cruz, Department of Ocean Sciences, Santa Cruz, CA, United States, (3)Sea-Bird Scientific, Philomath, OR, United States, (4)Lawrence Berkeley National Laboratory, Earth and Environmental Sciences Area, Berkeley, CA, United States, (5)Lawrence Berkeley National Laboratory, Berkeley, CA, United States
Carbon export and particulate trace metal cycling across the Western Arctic Ocean (650959)
Erin E Black1,2, Matthew A Charette3, Phoebe J Lam4, Robert F Anderson5, Lauren Elizabeth Kipp6, Yang Xiang4, Sebastian M Vivancos7, Stephanie Kienast1 and Ken Buesseler8, (1)Dalhousie University, Halifax, NS, Canada, (2)Lamont -Doherty Earth Observatory, Palisades, United States, (3)Woods Hole Oceanographic Institution, Marine Chemistry & Geochemistry, Woods Hole, MA, United States, (4)University of California Santa Cruz, Department of Ocean Sciences, Santa Cruz, CA, United States, (5)Lamont-Doherty Earth Obs, Palisades, NY, United States, (6)Woods Hole Oceanographic Institution, Woods Hole, MA, United States, (7)Columbia University, Department of Earth and Environmental Sciences, New York, NY, United States, (8)Woods Hole Oceanographic Institution, Department of Marine Chemistry & Geochemistry, Woods Hole, MA, United States
Dissolved And Particulate 226Ra Along GEOTRACES Pacific Meridional Transect (651176)
Emilie Le Roy1, Matthew A Charette1, Tristan J Horner2, Paul Henderson1, Pieter van Beek3 and Marc Souhaut3, (1)Woods Hole Oceanographic Institution, Marine Chemistry & Geochemistry, Woods Hole, MA, United States, (2)Woods Hole Oceanographic Institution, Marine Chemistry & Geochemistry, Woods Hole, United States, (3)LEGOS Laboratoire d'Etudes en Geophysique et Oceanographie Spatiale, Toulouse, France
227Ac along the GEOTRACES Meridional Pacific Transect: Preliminary Results (649330)
Douglas E Hammond1, Nathaniel James Kemnitz2, Paul Henderson3, Emilie Le Roy3, Matthew A Charette3, Willard S Moore4, Robert F Anderson5 and Martin Q Fleisher5, (1)University of Southern California, Los Angeles, CA, United States, (2)University of Southern California, Earth Sciences, Los Angeles, CA, United States, (3)Woods Hole Oceanographic Institution, Marine Chemistry & Geochemistry, Woods Hole, MA, United States, (4)University of South Carolina, School of the Earth, Ocean, and Environment, Columbia, SC, United States, (5)Lamont-Doherty Earth Obs, Palisades, NY, United States
Near-bottom 230Th and 231Pa Scavenging and Anomalous 230Th Burial Rates in the South Pacific (651705)
Martin Q Fleisher1, Frank J Pavia2, Robert F Anderson3, Sebastian M Vivancos4, Jordan T Abell5 and Gisela Winckler4, (1)Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, United States, (2)Lamont-Doherty Earth Obs, Palisades, United States, (3)Lamont-Doherty Earth Obs, Palisades, NY, United States, (4)Columbia University, Department of Earth and Environmental Sciences, New York, NY, United States, (5)Lamont-Doherty Earth Observatory, Palisades, NY, United States
