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Universität Augsburg
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Universität Augsburg
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Dr. Sophie Thery
Université Grenoble Alpes, Frankreich
spricht am
Donnerstag, 17. November 2022
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16:30 Uhr
im
Raum 2004 (L1)
über das Thema:
| Abstract: |
| The interactions between atmosphere and ocean play a major role in many geophysical situations (climate modelling, cyclone, weather forecast). Therefore, geophysical scale numerical simulation requires coupled atmospheric and oceanic models, which properly represent the behaviour of the boundary layers encompassing the air-sea interface and their two-way interactions. Nowadays, the currently used coupling methods implement a one way coupling through the interface condition. We propose to couple these models through a Schwarz iterative algorithm to represent better the interaction between atmosphere and ocean. In this talk, I will present Schwarz algorithm and how it can be used to implement better the two-way coupling between ocean and atmosphere dynamics. We study in particular the convergence of the iterative algorithm on a one dimensional two-way coupled diffusion equation with Ekman boundary layers. The particularity of this study is to take into account the turbulent phenomena near the ocean-atmosphere interface, considering a spatially variable viscosity coefficient. We first focus on a linear version of the diffusion equation. We will see how the Coriolis effect and the vertical parametrization of the turbulence influence the convergence of the algorithm. We will then consider the full non linear equation that includes non linear interface conditions and non linear diffusion coefficient. I will eventually discuss future research directions for this work. |
| Hierzu ergeht herzliche Einladung. |
| Prof. Dr. Malte Peter |
Kaffee, Tee und Gebäck eine halbe Stunde vor Vortragsbeginn im Raum 2006 (L1).