CT12A:
Revealing Biogeochemical Processes on Basin Scales through Ocean Transects I

Session ID#: 92763

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:  Rob Middag, NIOZ Royal Netherlands Institute for Sea Research, and Utrecht University, OCS, Den Burg, Netherlands and Karen L Casciotti, Stanford University, Stanford, United States
Student Paper Review Liaison:  Gregory A Cutter, Old Dominion University, Norfolk, VA, United States

Abstracts Submitted to this Session:

Large scale patterns and size distributions of marine particles across the African and Pacific Sectors of the Southern Ocean (648364)
Stephanie O'Daly1, Brita Kathryn Irving1, Rachel Marie Lekanoff2, Jessica Pretty3 and Andrew M. P. McDonnell2, (1)University of Alaska Fairbanks, College of Fisheries and Ocean Sciences, Fairbanks, AK, United States, (2)University of Alaska Fairbanks, Fairbanks, AK, United States, (3)University of Alaska Fairbanks, School of Fisheries and Ocean Sciences, Fairbanks, AK, United States
Basin-scale variations of particulate organic matter stoichiometry in the global ocean (643031)
Yang Xiang and Phoebe J Lam, University of California Santa Cruz, Department of Ocean Sciences, Santa Cruz, CA, United States
Controls of dissolved carbon fractions along a meridional transect through the South Pacific Ocean (650808)
Helena Osterholz1, David P.A. Kilgour2, Jutta Niggemann1 and Thorsten Dittmar3, (1)University of Oldenburg, ICBM-MPI Bridging Group for Marine Geochemistry, Oldenburg, Germany, (2)Nottingham Trent University, Department of Chemistry and Forensics, Nottingham, United Kingdom, (3)University of Oldenburg, Oldenburg, Germany
Decadal changes of anthropogenic and total carbon in the Atlantic Ocean (646356)
Reiner Steinfeldt1, Monika Rhein2 and Dagmar Kieke1, (1)University of Bremen, Bremen, Germany, (2)Univ Bremen, FB1, Bremen, Germany
Constraining the oceanic hydrothermal iron flux using iron isotopes (645768)
Alastair J.M. Lough1, Wenhao Wang2, Rachael Helen James3, Maeve C Lohan1 and Alessandro Tagliabue4, (1)University of Southampton, Ocean and Earth Sciences, National Oceanography Centre, Southampton, United Kingdom, (2)University of Southampton, Southampton, United Kingdom, (3)Univesity of Southampton, School of Ocean and Earth Science, Southampton, United Kingdom, (4)University of Liverpool, Earth, Ocean and Ecological Sciences, Liverpool, L69, United Kingdom
Hydrothermal Fe flux analysis of Loihi Seamount using size partitioning and Fe isotopes (654664)
Nathan Timothy Lanning1, Matthias Sieber2, Janelle Steffen1, Brent Alan Summers3, Gabrielle Weiss4, Christopher R German5, Prof Seth John6, William J Jenkins7, Reiner Schlitzer8, Mariko Hatta9, Alessandro Tagliabue10, Tim M Conway11 and Jessica N Fitzsimmons12, (1)Texas A&M University College Station, College Station, TX, United States, (2)ETH Swiss Federal Institute of Technology Zurich, Earth Sciences, Zurich, Switzerland, (3)Florida State University, Tallahassee, FL, United States, (4)University of Hawaii at Manoa, Honolulu, United States, (5)WHOI, Woods Hole, United States, (6)University of Southern California, Department of Earth Sciences, Los Angeles, CA, United States, (7)WHOI, Woods Hole, MA, United States, (8)Alfred Wegener Inst, Bremerhaven, Germany, (9)University of Hawaii at Manoa, Oceanography, Honolulu, HI, United States, (10)University of Liverpool, Liverpool, United Kingdom, (11)University of South Florida, College of Marine Science, St. Petersburg, United States, (12)Texas A&M University, Oceanography, College Station, TX, United States
Significant Biological Uptake of Trace Metals in the Mertz Glacier Polynya, East Antarctica (652330)
David Janssen1, Matthias Sieber2, Michael Joseph Ellwood3, Tim M Conway4, Pamela M Barrett5, Christel Hassler6 and Sam Jaccard1, (1)University of Bern, Institute of Geological Sciences & Oeschger Center for Climate Change Research, Bern, Switzerland, (2)ETH Swiss Federal Institute of Technology Zurich, Earth Sciences, Zurich, Switzerland, (3)Australian National University, Research School of Earth Sciences, Canberra, ACT, Australia, (4)University of South Florida, St. Petersburg, FL, United States, (5)The Australian National University, Research School of Earth Sciences, Canberra, ACT, Australia, (6)Department F. -A. Forel for Environmental and Aquatic Sciences, University of Geneva, Switzerland., Geneva, Switzerland
To the North Pole and Back: A Pan-Arctic Barium Synthesis (647851)
Laura M Whitmore1, Tristan J Horner2, Robert Rember3, Yang Xiang4, Phoebe J Lam4, Frank Dehairs5, Helmuth Thomas6, Alan M Shiller7 and Chantal Mears8, (1)Organization Not Listed, Washington, DC, United States, (2)Woods Hole Oceanographic Institution, Marine Chemistry & Geochemistry, Woods Hole, United States, (3)University of Alaska Fairbanks, International Arctic Research Center, Fairbanks, AK, United States, (4)University of California Santa Cruz, Department of Ocean Sciences, Santa Cruz, CA, United States, (5)Vrije Universiteit Brussel, Analytical, Environmental and Geo-Chemistry, Ixelles, Belgium, (6)Dalhousie University, Halifax, NS, Canada, (7)University of Southern Mississippi, Marine Science, Stennis Space Center, MS, United States, (8)Helmholtz Center Geesthacht, Germany