AWI Geotraces Activities

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Presentation transcript:

AWI Geotraces Activities Topical focus: Cycling of natural radionuclides in a changing Ocean (U series isotopes, REE) Regional focus: High latitudes in the Artic and Antarctic …but we are open to activities in more temperate regions

Past and present activities Oct/Nov 2005: intercalibration cruise Bremerhaven – Cape Town (RV Polarstern ANT XXIII-1) Jan/Feb 2006: Drake Passage cruise (RV Polarstern ANT XXIII-3) July-Oct 2007: Central Arctic Ocean (RV Polarstern (ARK XXII-2; IPY EOI #045, EU-FP6 Damocles)

ZERO and DRAKE expedition 2008 RV Polarstern ANT XXIV-3 (PI‘s M ZERO and DRAKE expedition 2008 RV Polarstern ANT XXIV-3 (PI‘s M. Rutgers van der Loeff, Hein de Baar, E. Fahrbach) high-resolution distribution of Th isotopes, 231Pa and 227Ac along the Zero Meridian and in the Drake Passage !!! PhD position available !!! particle dynamics (aggregation, disaggregation and particle sinking rates) and terrigenous input (Th isotopes and 231Pa) water mass ventilation and upwelling (derived from 230Th/ 231Pa and 227Ac distributions) plus hydrographic data

Zero & Drake cont. Importance of marine polysaccharides for radionuclide cycling (210Po, 234Th –TEP interaction) 234Th as tracer of export production of POC

Meteor 2009, Barbados - Las Palmas (PI W. Balzer) Productivity and dust gradient across ITCZ / tracing the far-field Amazon signal high-resolution distribution of 232Th, 230Th, 234Th 231Pa, REE 210Po, 210Pb, 234Th – POM/DOM interaction

Future cruises in high latitudes For 2011 and onwards Submit shiptime proposals for RV Polarstern now! Contact Michiel Rutgers van der Loeff or Eberhard Fahrbach