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CO07:	GEOTRACES in the International Polar Year
Sponsor:	Chemical Oceanography
Convener:	Rob (contact person) Middag Royal Netherlands Institute for Sea Research Landsdiep 4 Den Hoorn, NLD 1797 SZ 0031222369464 rob.middag@nioz.nl Patricia Cámara Mor Universidad Autonoma de Barcelona Facultad de Ciencias, C3-430 08029 Bellaterra Barcelona, ESP 08029 0034935811191 Patricia.Camara@uab.cat Delphine Lannuzel University of Tasmania Centre for Marine Science, PB 78 Hobart, AUS TAS 7001 delphine.lannuzel@utas.edu.au Celia Venchiarutti Alfred Wegener Institute Dept of Marine Geochemistry, Am Handelshafen 12, Room C-412 Bremerhaven, DEU D-27570 49 (471) 4831 1030 cvenchia@awi.de
	4805 4807 4860 4870 4875 .
Description:	Trace elements, such as iron, play a pivotal role in controlling ocean productivity and therefore global climate. Moreover several trace elements and isotopes serve as key tracers for unraveling processes and turnover rates in the oceans. The international GEOTRACES program pursues the characterization of marine biogeochemical cycles of Trace Elements and Isotopes (TEIs; stable or radioactive; natural or anthropogenic). In context of the International Polar Years (IPY) 2007-2009 the GEOTRACES program had its flying start with four Arctic and six Antarctic expeditions in order to study TEIs abundances, processes and fluxes in the polar oceans. The multi-tracer approaches and inter-calibration exercises carried out during IPY-GEOTRACES have produced novel relationships among TEIs and other tracers and improved methods for sampling and analyses. We seek topics on TEIs as controling elements as well as tracers of biogeochemical processes in the polar oceans in the context of IPY-GEOTRACES and other relevant projects.