Holt, J and Proctor, R and Ashworth, M and Allen, I and Blackford, J, Eddy resolved ecosystem modelling in the Irish Sea, Proceedings of the Tenth ECMWF Workshop on the use of High Performance Computing in Meteorology, 04-08 November 2002, Reading, United Kingdom, pp. 268-278. ISBN 978-981-238-376-1 (2003) [Refereed Conference Paper]
Copyright 2003 World Scientific Publishing
Official URL: http://dx.doi.org/10.1142/9789812704832_0020
One of the roles of this system is to act as a host to ecosystem models, so that they can interact with as accurate a physical environment as is currently feasible. In this study, a hierarchy of nested models links the shelf-wide circulation and ecosystem, via a high resolution physics model of the whole Irish Sea, to the test domain: a region of the western Irish Sea. In this domain, ecosystem models are tested at a resolution of ~1.5km (c.f. the typical summer Rossby radius of 4km). Investigations in the physics-only model show the significance of advective processes (particularly shear diffusion and baroclinic eddies) in determining the vertical and horizontal temperature structure in this region. Here we investigate how a hierarchy of complexity (and computational load) from a 1D point model to a fully 3D eddy resolved model affects the distribution of phytoplankton (and primary production) and nutrients predicted by the European Regional Seas Ecosystem Model (ERSEM), a complex multi-compartment ecosystem model.
We shall also show how the parallel programming features of the POLCOMS code allows large-scale simulations to be carried out on hundreds, and now on over a thousand, processors, approaching Teraflop/s performance levels. This is shown using a series of benchmark runs on the 1280 processor IBM POWER4 system operated by the UK's HPCx Consortium.
|Item Type:||Refereed Conference Paper|
|Keywords:||ecosystem modelling, Irish Sea|
|Research Division:||Earth Sciences|
|Research Field:||Oceanography not elsewhere classified|
|Objective Division:||Expanding Knowledge|
|Objective Group:||Expanding Knowledge|
|Objective Field:||Expanding Knowledge in the Earth Sciences|
|Author:||Proctor, R (Dr Roger Proctor)|
|Deposited By:||Integrated Marine Observing System|
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