Automated model optimisation using the Cylc workflow engine (Cyclops v1.0)

Gorman, Richard M.; Oliver, Hilary J.

doi:https://doi.org/10.5194/gmd-11-2153-2018

Articles | Volume 11, issue 6

https://doi.org/10.5194/gmd-11-2153-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/gmd-11-2153-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 11, issue 6

Methods for assessment of models

|

12 Jun 2018

Methods for assessment of models |

| 12 Jun 2018

Automated model optimisation using the Cylc workflow engine (Cyclops v1.0)

Richard M. Gorman and Hilary J. Oliver

Data sets

ERA-Interim surface fields ECMWF https://www.ecmwf.int/en/forecasts/datasets/archive-datasets/reanalysis-datasets/era-interim

IFREMER Satellite altimeter data IFREMER ftp://ftp.ifremer.fr/ifremer/cersat/products/swath/altimeters/waves/data/

Model code and software

Cyclops-V1.0 R. Gorman https://doi.org/10.5281/zenodo.837907

Cylc H. J. Oliver et al. https://doi.org/10.5281/zenodo.1251084

NLopt nonlinear-optimization package (Version 2.4.2) S. G. Johnson https://nlopt.readthedocs.io/en/latest/

Wavewatch III (version 4.18) NOAA http://polar.ncep.noaa.gov/waves/wavewatch/

Short summary

We describe an optimisation suite ("Cyclops") that can be used to apply a selection of nonlinear optimisation algorithms to "tune" the parameters of a geophysical model. Based on the Cylc workflow engine, Cyclops can be used to calibrate any modelling system that has itself been implemented as a (separate) Cylc model suite, provided it includes computation and output of the desired scalar cost function.