RT journal article
T1 Assessment of global wave models on regular and unstructured grids using the Unresolved Obstacles Source Term
A1 Mentaschi, Lorenzo
A1 Vousdoukas, Michalis
A1 Fernández-Montblanc, Tomás
A1 Kakoulaki, Georgia
A1 Voukouvalas, Evangelos
A1 Besio, Giovanni
A1 Salamon, Peter
A2 Ciencias de la Tierra
K1 Wave modeling
K1 Global wave modeling
K1 Subscale modeling
K1 Unresolved obstacles
K1 Unresolved Obstacles Source Term
K1 UOST
K1 WAVEWATCH III
K1 WW3
K1 Global unstructured mesh
K1 Global triangular mesh
AB The Unresolved Obstacles Source Term (UOST) is a general methodology for parameterizing the dissipative effects of subscale islands, cliffs, and other unresolved features in ocean wave models. Since it separates the dissipation from the energy advection scheme, it can be applied to any numerical scheme or any type of mesh. UOST is now part of the official release of WAVEWATCH III, and the freely available packagealphaBetaLabautomates the estimation of the parameters needed for the obstructed cells. In this contribution, an assessment of global regular and unstructured (triangular) wave models employing UOST is presented. The results in regular meshes show an improvement in model skill, both in terms of spectrum and of integrated parameters, thanks to the UOST modulation of the dissipation with wave direction, and to considering the cell geometry. The improvement is clear in wide areas characterized by the presence of islands, like the whole central-western Pacific Basin. In unstructured meshes, the use of UOST removes the need of high resolution in proximity of all small features, leading to (a) a simplification in the development process of large scale and global meshes, and (b) a significant decrease of the computational demand of accurate large-scale models.
PB SPRINGER HEIDELBERG
SN 1616-7341
YR 2020
FD 2020-11
LK http://hdl.handle.net/10498/23920
UL http://hdl.handle.net/10498/23920
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 14-nov-2026