Adaptation of the vertical resolution in the mixed layer for HYCOM |
| |
| Authors: | Ccile Renaudie Rmy Baraille Yves Morel Gwenaëlle Hello Herv Giordani |
| |
| Institution: | aS.H.O.M., (site de METEO-FRANCE), 42 av Gaspard Coriolis, 31057 TOULOUSE, France;bMETEO-FRANCE, CNRM/GMAP, 42 av Gaspard Coriolis, 31057 TOULOUSE, France |
| |
| Abstract: | This paper focuses on the dynamics of the mixed layer. When the mixed layer depth increases, the vertical discretisation eventually becomes too sparse at the bottom of this layer to accurately resolve its evolution and strong numerical errors can appear. This is linked to the fact that the vertical resolution is concentrated in the upper part of the ocean and does not adapt to the deepening of the mixed layer.Knowing that the HYbrid Coordinate Ocean Model (HYCOM) is able to modify the distribution of the vertical levels, we suggest in this paper a method to adapt the resolution to the mixed layer extension. This method is tested in 1-D configurations for two academic atmospheric forcing conditions (strong convection and wind-mixing) and a realistic forcing extending over one year, with seasonal restratification following strong winter convection. The new method improves the results in all cases, and in particular when the mixed layer reaches deep layers. |
| |
| Keywords: | Vertical discretisation Mixed layer dynamics Convection Hybrid coordinate model Global ocean North Atlantic |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
