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SFB754: Climate-Biogeochemistry Interactions in the Tropical Ocean

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  • Biology
  • Chemistry
  • Earth Science


11CLIVAR Exchanges No. 58, Vol. 17, No.1, February 2012 SFB 754: Climate- Biogeochemistry Interactions in the Tropical Ocean A. Oschlies1,2, P. Brandt1,2, C.K. Schelten2, L. Stramma2 and the SFB 754 consortium1,2,3 1 Christian-Albrechts University of Kiel, Germany 2 Helmholtz Centre for Ocean Research Kiel (GEOMAR), Germany 3 Max Planck Institute for Marine Microbiology, Bremen, Germany Project summary The Collaborative Research Centre (Sonderforschungsbereich, SFB) 754 has been funded by the German Research Foundation (Deutsche Forschungsgemeinschaft, DFG) since January 2008. After passing a thorough evaluation by an international review board, the second research period started in January 2012. The SFB 754 addresses climate induced ocean deoxygenation, with a focus on tropical oxygen minimum zones (OMZ) in the Atlantic and Pacific, and implications for the global marine biogeochemical system. The overall scientific goal of the SFB 754 is to understand the coupling of tropical climate variability and circulation with the ocean’s oxygen and nutrient budgets, to quantitatively evaluate the functioning of oxygen-sensitive microbial processes and their impact on biogeochemical cycles, and to assess potential consequences for the ocean’s future. The overall goal can be broken down into three main scientific questions: 1 How does subsurface dissolved oxygen in the tropical ocean respond to variability in ocean circulation and ventilation? 2 What are the sensitivities and feedbacks linking low or variable oxygen levels, organic matter dynamics, and key nutrient source and sink mechanisms? In the benthos? In the water column? 3 What are the magnitudes and time scales of past, present and likely future variations in oceanic oxygen and nutrient levels? On the regional scale? On the global scale? In addressing these basic science issues, the SFB 754 will be able to answer questions of key relevance for assessing impacts of climate change on th

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