Data/hora: 27/07/2024 03:06:03

Provedor de dados: 	Institutional Archive of Ifreme (ArchiMer)	
País: 	France	
Título: 	Influence of numerical schemes on current-topography interactions in 1/4 degrees global ocean simulations	
Autores: 	Penduff, T; Le Sommer, J; Barnier, B; Treguier, Anne-marie; Molines, J; Madec, G.	
Data: 	2007-12	
Ano: 	2007	
Resumo: 	The combined use of partial steps and of an energy-enstrophy conserving momentum advection scheme was shown by Barnier et al. (2006) to yield substantial improvements in the surface solution of the DRAKKAR 4 global sea-ice/ocean model. The present study extends this investigation below the surface with a special focus on the Atlantic and reveals many improvements there as well: e.g. more realistic path, structure and transports of major currents (Gulf Stream, North Atlantic Current, Confluence region, Zapiola anticyclone), behavior of shedded rings, narrower subsurface boundary currents, stronger mean and eddy flows (MKE and EKE) at depth, beneficial enhancement of cyclonic (anticyclonic) flows around topographic depressions (mountains). Interestingly, adding a no-slip boundary condition to this improved model setup cancels most of these improvements, bringing back the biases diagnosed without the improved momentum advection scheme and partial steps (these biases are typical of other models at comparable or higher resolutions). This shows that current-topography interactions and full-depth eddy-admitting model solutions can be seriously deteriorated by near-bottom sidewall friction, either explicit or inherent to inadequate numerical schemes.	
Tipo: 	Text	
Idioma: 	Inglês	
Identificador: 	http://archimer.ifremer.fr/doc/2007/publication-3712.pdf	
Editor: 	European Geosciences Union (EGU)	
Relação: 	http://archimer.ifremer.fr/doc/00000/3712/	
Formato: 	application/pdf	
Fonte: 	Ocean Science (1812-0784) (European Geosciences Union (EGU)), 2007-12 , Vol. 3 , N. 4 , P. 509-524	
Fonte: 	Author(s) 2007. This work is licensed under a Creative Commons License. EGU