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Discussion papers
https://doi.org/10.5194/os-2019-103
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/os-2019-103
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 09 Oct 2019

Submitted as: research article | 09 Oct 2019

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Ocean Science (OS).

3D dynamics of the Southeastern North Sea, effects of variable resolution

Ivan Kuznetsov1, Alexey Androsov1,2, Vera Fofonova1, Sergey Danilov1,3,4, Natalja Rakowsky1, Sven Harig1, and Karen Helen Wiltshire1 Ivan Kuznetsov et al.
  • 1Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Klußmannstr. 3d, 27570 Bremerhaven, Germany
  • 2Shirshov Institute of Oceanology RAS, Moscow, Russia
  • 3A. M. Obukhov Institute of Atmospheric Physics RAS, Moscow, Russia
  • 4Jacobs University, Bremen, Germany

Abstract. A newly developed coastal model FESOM-C based on three-dimensional unstructured meshes and finite volume is applied to simulate dynamics of the southeastern part of the North Sea. Variable horizontal resolution enables using meshes that are coarse in the open sea but refined in the shallow areas (which include the Wadden Sea and the estuaries) to resolve important small-scale process (such as wetting and drying, sub-mesoscales eddies and dynamics of steep coastal fronts). Model results for the simulation for the period between January 2010 and December 2014 agree reasonably well with data from numerous autonomous observation stations with high temporal and spatial resolution, located in the region, data from ferry boxes and glider expeditions. The analysis of numerical solution convergence on meshes with different horizontal resolutions allows identifying areas where high mesh resolution (wetting and drying zones, shallow areas) and low mesh resolution (open boundary, open sea, and deep regions) are optimal for numerical simulations.

Ivan Kuznetsov et al.
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Ivan Kuznetsov et al.
Model code and software

FESOM-C A. Androsov, V. Fofonova, I. Kuznetsov, S. Danilov, N. Rakowsky, S. Harig, H. Brix, and K. H. Wiltshire https://doi.org/10.5281/zenodo.2085177

Ivan Kuznetsov et al.
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Short summary
Coastal regions play a significant role in global processes. Numerical models are one of the major instruments in understanding ocean dynamics. The main objective of this article is to demonstrate the representativeness of the simulations with the new FESOM-C model by comparing the results with observational data for the southeastern part of the North Sea. An equally important objective is to present the application of convergence analysis of solutions for grids of different spatial resolutions.
Coastal regions play a significant role in global processes. Numerical models are one of the...
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