Description: Das Projekt "Vortexdynamik und Horizontaltransport von Waerme und Masse als Folge von Tiefenkonvektion" wird vom Umweltbundesamt gefördert und von Stiftung Alfred-Wegener-Institut für Polar- und Meeresforschung e.V. (AWI) durchgeführt. The project was dedicated to a thorough theoretical and numerical investigation of the generation and dynamics of localized vortices and the resulting lateral vortex heat/mass transport in rotating slantwise convection processes. These processes occur in fluids with both vertical and horizontal density (temperature) gradients and dominate the lateral vortex heat/mass transport in the ocean. By joint efforts, scientists from Germany and Russia with background in atmospheric and ocean sciences have worked on the modelling and parameterization of horizontal heat/mass transport due to deep convection events in the ocean. The following main results were obtained during the two-year period of research: - we have clarified the structure of turbulent and mean fields in convective region by a systematic high resolution numerical study of the coherent vortex structures generated by convection with rotation, using a LES (Large Eddy Simulation) model, - we have developed an analytical theory for the lateral heat/mass transport dominated by localized baroclinic vortices, based on 3D-heton and multi-layer-heton models, and implemented it in numerical models; - we have found out the specific phenomenon of mixing-depth-dependent spreading and a linear power law for the spreading of the mean radius of heton populations, which form a basis for physically justified parameterizations for lateral eddy heat/mass transport dominated by localized baroclinic vortices.
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Transportrecht ? Meerestemperatur ? Main ? Russland ? Meereskunde ? Tiefsee ? Atmosphärische Wissenschaften ? Energie ? Mathematisches Modell ? Rechtsgebiet ? Simulation ? Strömungsmechanik ? Studie ? Meeresgewässer ? Modellierung ? Bauliche Anlage ? Meeresforschung ? Turbulenz ? Verkehrstechnik ? Auflösungsvermögen ? LES ? Large-Eddy-Simulation ? Tiefenkonvektion ? Wasserbewegung ? Wärmetransport ?
Region: Bremen
Bounding box: 8.83333° .. 8.83333° x 53.08333° .. 53.08333°
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 1996-11-01 - 1998-10-31
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