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Cycling of Radionuclides in the Arctic and Antarctic Oceans: Research Opportunities

Explore the cycling of natural radionuclides, including U-series isotopes and rare earth elements, in a changing ocean. Our research focuses on high-latitude regions of the Arctic and Antarctic, with opportunities for activities in temperate zones. We have ongoing projects from intercalibration cruises to detailed studies of particle dynamics, water mass ventilation, and marine polysaccharides' roles. PhD positions are available, and we invite proposals for future research cruises on the RV Polarstern. Join us in advancing the understanding of radionuclide behaviors in marine environments.

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Cycling of Radionuclides in the Arctic and Antarctic Oceans: Research Opportunities

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  1. 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

  2. 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)

  3. ZERO and DRAKE expedition 2008RV 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

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

  5. 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

  6. 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

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