CT31A:
The Behavior of Trace Elements and Isotopes in Different Ocean Basins: New Insights from Comparisons and Contrasts I


Session ID#: 37178

Session Description:
Recent international programs such as GEOTRACES have been examining the biogeochemical cycling of trace elements and isotopes (TEIs) in the world’s oceans to reveal the mechanisms and rates affecting their concentrations, distributions, chemical forms, and interactions with organisms. In addition to studies by individual investigators, the accumulating results show many similarities, but some surprising differences between ocean basins, with a classic example being the regionally-specific Cd/PO4 relationships. In the same way that deviations from the Redfield ratio of N/P between ocean basins, known since the 1970s GEOSECS program, provide insight into nitrogen cycle processes, what can we learn from the comparisons and contrasts of TEIs, and what tools are needed to explore and test these observations? This session seeks presentations from the observational and modeling communities on lessons learned from inter basin TEI data sets with respect to inputs to, cycling within, and exports from the world’s oceans. In addition we invite contributions that consider how TEI distributions, their chemical speciation, and interactions with micro-organisms shape microbial community structure and productivity in various ocean basins.
Primary Chair:  Gregory A Cutter, Old Dominion University, Ocean, Earth and Atmospheric Sciences, Norfolk, VA, United States
Co-chairs:  Adrian Burd, University of Georgia, Athens, GA, United States, Jay T. Cullen, University of Victoria, School of Earth and Ocean Sciences, Victoria, BC, Canada and Tung-Yuan Ho, Academia Sinica, Research Center for Environmental Changes, Taipei, Taiwan
Moderators:  Gregory A Cutter, Old Dominion University, Ocean, Earth and Atmospheric Sciences, Norfolk, VA, United States and Jay T. Cullen, University of Victoria, School of Earth and Ocean Sciences, Victoria, BC, Canada
Student Paper Review Liaison:  Jay T. Cullen, University of Victoria, School of Earth and Ocean Sciences, Victoria, BC, Canada
Index Terms:

1952 Modeling [INFORMATICS]
4860 Radioactivity and radioisotopes [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4870 Stable isotopes [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4875 Trace elements [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
Cross-Topics:
  • BN - Biogeochemistry and Nutrients
  • MM - Microbiology and Molecular Ecology
  • OM - Ocean Modeling

Abstracts Submitted to this Session:

Anthropogenic aerosols: the major source of soluble iron in the surface water of the Northwestern Pacific Ocean (308879)
Tung-Yuan Ho, Wan-Chen Tu, Chih-Chiang Hsieh, Shun-Chung Yang and Wen-Hsuan Liao, Academia Sinica, Research Center for Environmental Changes, Taipei, Taiwan
Contrasting Behavior of Iron and Related Metals in the Western Indian Ocean and Eastern tropical South Pacific Ocean (314907)
James W Moffett, University of Southern California, Los Angeles, CA, United States
High iron in outflow waters from the Dotson Ice Shelf cavity, Amundsen Sea, West Antarctica: is glacial meltwater really the source? (326375)
Robert M Sherrell1, Patricia L Yager2, Pierre St-Laurent3, Michael S Dinniman3, Sharon Elisabeth Stammerjohn4, Maria Lagerstrom5 and Kathleen M Harazin6, (1)Rutgers University New Brunswick NJ, New Brunswick, NJ, United States, (2)University of Georgia, Athens, GA, United States, (3)Old Dominion University, Center for Coastal Physical Oceanography, Norfolk, VA, United States, (4)University of Colorado Boulder, Boulder, CO, United States, (5)Stockholm University, Stockholm, Sweden, (6)Rutgers University, Piscataway, NJ, United States
Contribution of marginal sea sediment on iron cycling in the North Pacific (309751)
Kazuhiro Misumi1, Daisuke Tsumune2, Takaki Tsubono3, Matthew C Long4, Keith T Lindsay4 and J. Keith Moore5, (1)Central Research Institute of Electic Power Industry, Tokyo, Japan, (2)Central Research Institute of Electric Power Industry, Tokyo, Japan, (3)Central Research Institute of Electric Power Industry, Abiko, Japan, (4)NCAR, Boulder, CO, United States, (5)University of California Irvine, Irvine, CA, United States
What controls the subsurface extrema of dissolved iron in the upper ocean thermocline? (304871)
Anh Pham, Georgia Institute of Technology Main Campus, School of Earth and Atmospheric Sciences, Atlanta, GA, United States and Takamitsu Ito, Georgia Institute of Technology, Atlanta, GA, United States
Comparisons of size-fractioned suspended particles in three different basins from the US GEOTRACES NAZT (GA03), EPZT (GP16) and Arctic (GN01) Cruises (307490)
Yang Xiang and Phoebe J Lam, University of California Santa Cruz, Department of Ocean Sciences, Santa Cruz, CA, United States

See more of: Chemical Tracers, Organic Matter and Trace Elements