GEOTRACES Sessions at ASLO2017, Aquatic Sciences Meeting

ASLO 2017, Aquatic Sciences Meeting
26 February – 3 March 2017
Honolulu, Hawaii, USA

Abstract submission deadline: 14 October 2016

For further information: http://www.sgmeet.com/aslo/honolulu2017/default.asp

 
GEOTRACES sessions:

004 – Biogeochemical Cycling of Trace Elements and Isotopes in the Arctic Ocean

Trace elements can play a dual role in the ocean either as essential micronutrients (e.g., Co, Fe, Zn), or as toxicants (e.g., As, Cu, Hg), and can affect biological productivity, carbon cycling and the emission of climatically important trace gases. In addition, the distribution and isotopic composition of many trace elements and gases provide information on biogeochemical and physical processes. The Arctic Ocean, in particular, is undergoing rapid and profound transformation attributed to climate change. Easier access and accelerated resource exploitation are also expected in the coming years. It is therefore timely to examine more thoroughly the distribution and cycling of trace element and isotopes (TEI), and dissolved gases in the Arctic Ocean and to establish their potential role in controlling or recording rapidly changing oceanic processes. To that end, after six years of collaborative planning, the international GEOTRACES program undertook a coordinated study of TEIs, dissolved gases, and biological productivity in the Arctic in summer-fall 2015, comprising three funded icebreaker programs from Germany, Canada, and the United States. This session seeks presentations on all aspects of this work and their relevance to Arctic Ocean processes from the GEOTRACES expeditions and other related field and laboratory efforts.

ORGANIZERS

Greg Cutter, Old Dominion University, gcutter@odu.edu
Roger Francois, University of British Columbia, rfrancoi@eos.ubc.ca
David Kadko, Florida International University, dkadko@fiu.edu
William Landing, Florida State University, wlanding@fsu.edu
Michiel Rutgers Van der Loeff, Alfred Wegener Institute, Mloeff@awi.de

025 – Linking atmospheric deposition to the biogeochemistry of aquatic and marine systems

Atmospheric deposition of lithogenic, anthropogenic, and marine aerosols is an important transport pathway for nutrients and contaminants to aquatic watersheds and the surface ocean. Constraining local, regional, and global atmospheric deposition fluxes and the bioavailability and toxicity of aerosol-sourced elements and compounds is essential to furthering understanding of global biogeochemical cycles. Aerosol emission, transport, and deposition processes are, in part, a function of changes in land use and anthropogenic emissions, as well as short-term meteorological events and long-term climatic change on a global scale. Hence the study of system responses will improve our current understanding and facilitate the prediction of future impacts. This session invites contributions from studies of atmospheric deposition in marine and aquatic environments including, but not limited to, characterization of aerosol composition, quantification of atmospheric deposition fluxes and aerosol fractional solubility, assessment of the fate of aerosol-sourced compounds, and the biological and chemical response to deposition. Contributions from global and regional scale field observations, laboratory studies, and modeling efforts are welcomed.

ORGANIZERS

Clifton Buck, Skidaway Institute of Oceanography, clifton.buck@skio.uga.edu
Rachel Shelley, LEMAR-Universite de Bretagne Occidentale, rachel.shelley@univ-brest.fr