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The Effect of Various Vertical Discretization Schemes and Horizontal Diffusion Parameterization on the Performance of a 3-d Ocean Model: the Black Sea Case Study : Volume 9, Issue 2 (21/03/2013)

By Shapiro, G.

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Book Id: WPLBN0004020651
Format Type: PDF Article :
File Size: Pages 14
Reproduction Date: 2015

Title: The Effect of Various Vertical Discretization Schemes and Horizontal Diffusion Parameterization on the Performance of a 3-d Ocean Model: the Black Sea Case Study : Volume 9, Issue 2 (21/03/2013)  
Author: Shapiro, G.
Volume: Vol. 9, Issue 2
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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Storkey, D., Pickering, J., Luneva, M., & Shapiro, G. (2013). The Effect of Various Vertical Discretization Schemes and Horizontal Diffusion Parameterization on the Performance of a 3-d Ocean Model: the Black Sea Case Study : Volume 9, Issue 2 (21/03/2013). Retrieved from

Description: University of Plymouth, School of Marine Science and Engineering, Drake Circus, Plymouth, PL4 8AA, 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 hybrid 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 are used to identify the optimum value of Smagorinsky diffusivity coefficient to best represent the mesoscale activity.

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

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