ASLO 2013, Aquatic Sciences Meeting

ASLO 2013, Aquatic Sciences Meeting
Dates: 17-22 February 2013
Location: New Orleans, Louisiana

For further information: http://www.aslo.org/meetings/neworleans2013/

GEOTRACES relevant sessions:

**SS57: Trace Elements and Isotopes in the Ocean and Atmosphere: the International GEOTRACES Program
Conveners: Peter Morton, Florida State University; Carl Lamborg, Woods Hole Oceanographic Institution.

The international GEOTRACES program is a multi-nation and multi-year effort to determine the concentration and speciation of trace elements and select isotopes in the world’s major ocean basins and some marginal seas at high vertical and horizontal resolution, reminiscent of the GEOSECS program. This program’s goal is “to improve the understanding of biogeochemical cycles and large-scale distribution of trace elements and their isotopes in the marine environment.” ( www.geotraces.org). To date, 35 “GEOTRACES compliant” section and process cruises have been completed and many more are planned. For this session, we invite investigators to share their findings from any GEOTRACES cruise including those related to dissolved and particulate trace elements, isotopes, nutrients and dissolved gases as well as atmospheric analyses. We also welcome presentations describing intercalibration, data management and modeling efforts related to GEOTRACES process and section studies.

**SS08: Biogeochemistry of Metal-binding Organic Ligands in the Ocean: Sources, Composition and Impacts on Trace Metal Cycling
Conveners: Maeve C. Lohan, University of Plymouth; Sylvia G. Sander, University of Otago; Kristen N. Buck, Bermuda Institute of Ocean Sciences

The bioactive trace metals iron, copper, cobalt, nickel, zinc and cadmium are essential micronutrients for marine phytoplankton and exert a major influence on the global carbon cycle. Complexation of these metals by organic ligands may enhance or reduce bioavailability depending upon the metal-ligand complex formed. Yet we know little about the composition, sources and cycling of metal-binding ligands, which is hindering further advances in the field of trace metal biogeochemistry. An active SCOR Working Group (WG 139) ‘Organic Ligands- A Key Control on Trace Metal Cycling in the Ocean’ fosters the multidisciplinary collaboration of trace metal biogeochemists, organic geochemists and biogeochemical modelers in order to advance this field. This session is a community wide forum to highlight recent accomplishments in metal-binding ligand characterization and approaches for assessing ligand composition, sources and impacts on trace metal cycling in the aquatic environment, and to discuss future efforts in this field. We welcome abstracts related to metal-binding ligands from throughout the multidisciplinary field of oceanography.