CT21A:
Revealing Biogeochemical Processes on Basin Scales through Ocean Transects III

Session ID#: 92771

Session Description:
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.
Co-Sponsor(s):
  • NC - Nutrient Cycling
  • OB - Ocean Biology and Biogeochemistry
  • OM - Ocean Modeling
Index Terms:

4805 Biogeochemical cycles, processes, and modeling [OCEANOGRAPHY: CHEMICAL]
4808 Chemical tracers [OCEANOGRAPHY: CHEMICAL]
4860 Radioactivity and radioisotopes [OCEANOGRAPHY: CHEMICAL]
4875 Trace elements [OCEANOGRAPHY: CHEMICAL]
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:  Phoebe J Lam, University of California Santa Cruz, Department of Ocean Sciences, Santa Cruz, CA, 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

Abstracts Submitted to this Session:

Re-analysis of Bioactive Trace Element Atmospheric Deposition along the P16 CLIVAR Line (639343)
William M Landing, Florida State University, Earth, Ocean, and Atmospheric Science, Tallahassee, FL, United States, Clifton S Buck, Skidaway Institute of Oceanography, Savannah, GA, United States, David C Kadko, Florida International University, Applied Research Center, Miami, FL, United States and Angela Milne, University of Plymouth, Plymouth, United Kingdom
Constraining iron sources and cycling during seasonal bloom development in the Australian sector of the Southern Ocean (650737)
Pamela M Barrett1, Robin Grün1, Robert F Strzepek2 and Michael Joseph Ellwood1, (1)Australian National University, Research School of Earth Sciences, Canberra, ACT, Australia, (2)University of Tasmania, Antarctic Gateway Partnership, Institute for Marine and Antarctic Studies (IMAS), Hobart, TAS, Australia
Copper concentrations and isotopic composition in the North Pacific (648587)
Shun-Chung Yang1, Xiaopeng Bian1, Tim M Conway2 and Prof Seth John1, (1)University of Southern California, Department of Earth Sciences, Los Angeles, CA, United States, (2)University of South Florida, St. Petersburg, FL, United States
Controls of Copper in the Ocean (644605)
Saeed Roshan, University of California Santa Barbara, Santa Barbara, CA, United States, Timothy J DeVries, University of California, Santa Barabara, Earth Research Institute and Department of Geography, Santa Barabara, United States and Jingfeng Wu, Univ of Miami, Miami, FL, United States
The distribution of dissolved molybdenum, vanadium and uranium in the Atlantic Ocean (649948)
Imelda Velasquez, Sandra Poehle and Andrea Koschinsky, Jacobs University Bremen, Department of Physics and Earth Sciences, Bremen, Germany
Inter-Basin Comparison of Boundary Scavenging Expressed in Dissolved and Particulate Thorium and Protactinium Along GEOTRACES GN01, GP16, and GA03 Transects (649228)
Sebastian M Vivancos1,2, Robert F Anderson1,2, Martin Q Fleisher1, Frank J Pavia1,2, Pu Zhang3,4, Xianglei Li5, Hai Cheng3,4, R. Lawrence Edwards5, Yang Xiang6 and Phoebe J Lam6, (1)Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, United States, (2)Columbia University, Department of Earth and Environmental Sciences, New York, NY, United States, (3)University of Minnesota, Department of Earth Sciences, Minneapolis, MN, United States, (4)Xi'an Jiaotong University, Institute of Global Environmental Change, Xi'an, China, (5)University of Minnesota, Department of Earth Sciences, Minneapolis, United States, (6)University of California Santa Cruz, Department of Ocean Sciences, Santa Cruz, CA, United States
Lead concentration and isotopic compositions in the central Pacific basin: GEOTRACES PMT (GP15) (647925)
Edward A Boyle, Massachusetts Institute of Technology, Earth Atmospheric and Planetary Sciences, Cambridge, MA, United States and Shuo Jiang, East China Normal University, State Key Laboratory for Estuarine and Coastal Marine Research, Shanghai, China
Quantifying Atmospheric Trace Element Deposition on a Global Scale with GEOTRACES Transect Data (637044)
David C Kadko, Florida International University, Applied Research Center, Miami, FL, United States, William M Landing, Florida State University, Earth, Ocean, and Atmospheric Science, Tallahassee, FL, United States, Cliff Buck, University of Georgia, Athens, GA, United States and Christopher M Marsay, Skidaway Institute of Oceanography, University of Georgia, Savannah, GA, United States