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The Effect of Various Vertical Discretization Schemes and Horizontal Diffusion Parameterisation on the Performance of a 3-d Ocean Model: the Black Sea Case Study : Volume 9, Issue 6 (22/11/2012)

By Shapiro, G.

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Book Id: WPLBN0003984272
Format Type: PDF Article :
File Size: Pages 29
Reproduction Date: 2015

Title: The Effect of Various Vertical Discretization Schemes and Horizontal Diffusion Parameterisation on the Performance of a 3-d Ocean Model: the Black Sea Case Study : Volume 9, Issue 6 (22/11/2012)  
Author: Shapiro, G.
Volume: Vol. 9, Issue 6
Language: English
Subject: Science, Ocean, Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Luneva, M., Pickering, J., Storkey, D., & Shapiro, G. (2012). The Effect of Various Vertical Discretization Schemes and Horizontal Diffusion Parameterisation on the Performance of a 3-d Ocean Model: the Black Sea Case Study : Volume 9, Issue 6 (22/11/2012). Retrieved from

Description: University of Plymouth, UK. Results of a sensitivity study are presented from various configurations of the NEMO ocean model in the Black Sea. The standard choices of vertical discretization, viz. z-levels, s-coordinates and enveloped s-coordinates, all show their limitations in the areas of complex topography. Two new hydrid vertical coordinate schemes are presented: the s-on-top-of-z and its enveloped version. The hybrid grids use s-coordinates or enveloped s-coordinates in the upper layer, from the sea surface to the depth of the shelf break, and z-coordinates are set below this level. The study is carried out for a number of idealised and real world settings. The hybrid schemes help reduce errors generated by the standard schemes in the areas of steep topography. Results of sensitivity tests with various horizontal diffusion formulations show that the mesoscale activity is better captured with a significantly smaller value of Smagorinsky viscosity coefficient than it was previously suggested.

The effect of various vertical discretization schemes and horizontal diffusion parameterisation on the performance of a 3-D ocean model: the Black Sea case study

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