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Exzellenzcluster 80 (EXC): Ozean der Zukunft

Description: Das Projekt "Exzellenzcluster 80 (EXC): Ozean der Zukunft" wird vom Umweltbundesamt gefördert und von Universität zu Kiel, Mathematisches Seminar, Arbeitsgruppe Angewandte Mathematik durchgeführt. The biotic uptake of carbon of the ocean crucially depends on near surface vertical mixing processes. Vertical mixing transports the essential nutrients from the aphotic to the euphotic zone where photosynthesis can take place. This upward flux of nutrients is (in steady state) in turn balanced by the export of organic materials down to the aphotic zone, i.e. it is directly related to the biotically induced carbon drawdown in the ocean (the biological carbon pump). In ocean models these processes have to be parameterized since not all spatial scales can be resolved. These parametrizations are still a source of large uncertainties concerning the carbon uptake of the oceans. In this project, we aim to improve the parameterization of near surface vertical mixing processes. We propose to apply a 3-D non-hydrostatic Large-Eddy Simulation (LES) model to the surface ocean to explicitly resolve spatial scales ranging from 500m down to 1 m. The results will be compared with different state-of-the-art parameterizations of vertical mixing as used in the existing global ocean circulation models (e.g. Kiel Climate Model, FLAME). The intention is to optimize parameters associated with the parameterizations of vertical mixing and, subsequently, to examine the sensitivity of modeled carbon uptake (as modeled with an ecosystem coupled to a global ocean circulation model) on the optimized parameterizations.

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SupportProgram

Origin: /Bund/UBA/UFORDAT

Tags: Kiel ? Naturwerkstoff ? Export ? Biopharmazeutikum ? Fischer-Tropsch-Verfahren ? Kohlenstoff ? Nährstoff ? Photosynthese ? Gelöster organischer Kohlenstoff ? Ozeanzirkulation ? Globalmodell ? Klimamodell ? Meeresoberfläche ? Ökosystemmodell ? Pumpe ? Simulationsmodell ? Stand der Technik ? Zirkulationsmodell ? Meeresgewässer ? Kenngröße ? Ökosystem ? Zirkulation ? Verkehr ? Adsox-Verfahren ? Bram-Verfahren ? Flämmen ?

Region: Schleswig-Holstein

Bounding box: 9.75° .. 9.75° x 54.2° .. 54.2°

License: cc-by-nc-nd/4.0

Language: Deutsch

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Time ranges: 2007-09-01 - 2009-08-31

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