CT13A:
Revealing Biogeochemical Processes on Basin Scales through Ocean Transects II

Session ID#: 92767

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:  Gregory A Cutter, Old Dominion University, Norfolk, VA, United States and Phoebe J Lam, University of California Santa Cruz, Department of Ocean Sciences, Santa Cruz, CA, United States
Student Paper Review Liaison:  Gregory A Cutter, Old Dominion University, Norfolk, VA, United States

Abstracts Submitted to this Session:

Insights into carbon export and remineralization fluxes using 234Th distribution along the GEOTRACES Pacific Meridional transect (643562)
Jennifer An Kenyon1, Ken Buesseler2, Phoebe J Lam3, Steven M Pike1, Nick Carracino4 and Sophie Rojas4, (1)Woods Hole Oceanographic Institution, Department of Marine Chemistry & Geochemistry, Woods Hole, United States, (2)Woods Hole Oceanographic Institution, Department of Marine Chemistry & Geochemistry, Woods Hole, MA, United States, (3)University of California Santa Cruz, Department of Ocean Sciences, Santa Cruz, CA, United States, (4)University of California Santa Cruz, Ocean Sciences, Santa Cruz, CA, United States
Distributions of Dissolved Iron along the 2018 U.S. GEOTRACES GP15 Pacific Meridional Transect (654907)
Gabrielle Weiss1, Mariko Hatta1, Chris I Measures1, Jessica N Fitzsimmons2, Nathan Timothy Lanning3, Tim M Conway4 and Matthias Sieber5, (1)University of Hawaii at Manoa, Oceanography, Honolulu, HI, United States, (2)Texas A&M University, Oceanography, College Station, TX, United States, (3)Texas A&M University College Station, College Station, TX, United States, (4)University of South Florida, College of Marine Science, St. Petersburg, United States, (5)University of South Florida, College of Marine Science, St. Petersburg, FL, United States
Dissolved cobalt speciation along the GEOTRACES Pacific meridional transect (GP15) (655287)
Rebecca Chmiel, Woods Hole Oceanographic Institution, Woods Hole, MA, United States, Karen L Casciotti, Stanford University, Stanford, United States, Gregory A Cutter, Old Dominion University, Norfolk, VA, United States, Phoebe J Lam, University of California Santa Cruz, Department of Ocean Sciences, Santa Cruz, CA, United States and Mak A Saito, WHOI, Woods Hole, MA, United States
A multi-element perspective on Pacific dissolved trace metal cycling from the GEOTRACES GP15 PMT cruise (657658)
Jessica N Fitzsimmons1, Nathan Timothy Lanning2, Dylan Halbeisen1, Claire P. Till3, Mariko Hatta4, Gabrielle A Weiss4, Tim M Conway5, Matthias Sieber6, Prof Seth John7, Shun-Chung Yang8 and Xiaopeng Bian7, (1)Texas A&M University, Oceanography, College Station, TX, United States, (2)Texas A&M University College Station, College Station, TX, United States, (3)Humboldt State University, Chemistry, Arcata, CA, United States, (4)University of Hawaii at Manoa, Oceanography, Honolulu, HI, United States, (5)University of South Florida, College of Marine Science, St. Petersburg, United States, (6)University of South Florida, College of Marine Science, St. Petersburg, FL, United States, (7)University of Southern California, Department of Earth Sciences, Los Angeles, CA, United States, (8)Academia Sinica, Research Center for Environmental Changes, Taipei, Taiwan
Dissolved Al during GEOTRACES Pacific Meridional Transect in the North Pacific Ocean (644600)
Mariko Hatta, Chris I Measures and Gabrielle A Weiss, University of Hawaii at Manoa, Oceanography, Honolulu, HI, United States
Mercury and Trace Metal Cycling in the Surface North Pacific Ocean (656235)
Emily Seelen1, Nicholas Hawco1, Randelle M Bundy2, Ji Woon Park2, Robert P Mason3 and Prof Seth John4, (1)University of Southern California, Earth Sciences, Los Angeles, CA, United States, (2)University of Washington, School of Oceanography, Seattle, WA, United States, (3)University of Connecticut, Marine Sciences, Groton, CT, United States, (4)University of Southern California, Department of Earth Sciences, Los Angeles, CA, United States
Biogeochemical cycling of hydrogen sulfide in the oxic Pacific Ocean (651918)
Nicole Buckley, Old Dominion University, Ocean, Earth and Atmospheric Sciences, Norfolk, VA, United States and Gregory A Cutter, Old Dominion University, Norfolk, VA, United States
Anthropogenic Asian Aerosols provide Fe to the North Pacific (651509)
Paulina Pinedo-Gonzalez1, Nicholas Hawco2, Randelle M Bundy3, Virginia Armbrust3, Michael J Follows4, B. B. Cael5, Angelicque E White6, Sara Ferrón6, David M Karl6 and Prof Seth John7, (1)Lamont -Doherty Earth Observatory, Geochemistry, Palisades, NY, United States, (2)University of Southern California, Earth Sciences, Los Angeles, CA, United States, (3)University of Washington, School of Oceanography, Seattle, WA, United States, (4)Massachusetts Institute of Technology, Cambridge, MA, United States, (5)University of Hawaii, Department of Oceanography, Honolulu, United States, (6)University of Hawaii, Department of Oceanography, Honolulu, HI, United States, (7)University of Southern California, Department of Earth Sciences, Los Angeles, CA, United States