Journal cover Journal topic
Geoscientific Model Development An interactive open-access journal of the European Geosciences Union
Geosci. Model Dev., 7, 3059-3087, 2014
https://doi.org/10.5194/gmd-7-3059-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.
Methods for assessment of models
18 Dec 2014
Using the UM dynamical cores to reproduce idealised 3-D flows
N. J. Mayne1, I. Baraffe1, D. M. Acreman1, C. Smith2, N. Wood2, D. S. Amundsen1, J. Thuburn3, and D. R. Jackson2 1Physics and Astronomy, University of Exeter, Exeter, EX4 4QL, UK
2Met Office, Exeter, EX1 3PB, UK
3Mathematics, University of Exeter, Exeter, EX4 4QL, UK
Abstract. We demonstrate that both the current (New Dynamics), and next generation (ENDGame) dynamical cores of the UK Met Office global circulation model, the UM, reproduce consistently, the long-term, large-scale flows found in several published idealised tests. The cases presented are the Held–Suarez test, a simplified model of Earth (including a stratosphere), and a hypothetical tidally locked Earth. Furthermore, we show that using simplifications to the dynamical equations, which are expected to be justified for the physical domains and flow regimes we have studied, and which are supported by the ENDGame dynamical core, also produces matching long-term, large-scale flows. Finally, we present evidence for differences in the detail of the planetary flows and circulations resulting from improvements in the ENDGame formulation over New Dynamics.

Citation: Mayne, N. J., Baraffe, I., Acreman, D. M., Smith, C., Wood, N., Amundsen, D. S., Thuburn, J., and Jackson, D. R.: Using the UM dynamical cores to reproduce idealised 3-D flows, Geosci. Model Dev., 7, 3059-3087, https://doi.org/10.5194/gmd-7-3059-2014, 2014.
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