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www.geosci-model-dev-discuss.net/4/843/2011/
doi:10.5194/gmdd-4-843-2011
© Author(s) 2011. This work is distributed
under the Creative Commons Attribution 3.0 License.
iGen: a program for the automated generation of models and parameterisations
1School of Mathematics, University of Manchester, Manchester, UK
2School of Earth and Environment, University of Leeds, Leeds, UK
Abstract. Complex physical systems can often be simulated using very high-resolution models but this is not always practical because of computational restrictions. In this case the model must be simplified or parameterised, but this is a notoriously difficult process that often requires the introduction of "model assumptions" that are hard or impossible to justify. Here we introduce a new approach to parameterising models. The approach makes use of a newly developed computer program, which we call iGen, that analyses the source code of a high-resolution model and formally derives a much faster parameterised model that closely approximates the original, reporting bounds on the error introduced by any approximations. These error bounds can be used to formally justify use of the parameterised model in subsequent numerical experiments. Using increasingly complex physical systems as examples we illustrate that iGen has the ability to produce parameterisations that run typically orders of magnitude faster than the underlying, high-resolution models from which they are derived and show that iGen has the potential to become an important tool in model development.
Discussion Paper (PDF, 599 KB) Interactive Discussion (Closed, 3 Comments) Final Revised Paper (GMD)
Notice on Discussion StatusCitation: Tang, D. F. and Dobbie, S.: iGen: a program for the automated generation of models and parameterisations, Geosci. Model Dev. Discuss., 4, 843-868, doi:10.5194/gmdd-4-843-2011, 2011. Bibtex EndNote Reference Manager XML
