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Geoscientific Model Development An interactive open-access journal of the European Geosciences Union
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Discussion papers
https://doi.org/10.5194/gmd-2020-43
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gmd-2020-43
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: model description paper 05 Mar 2020

Submitted as: model description paper | 05 Mar 2020

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This preprint is currently under review for the journal GMD.

FORTE 2.0: a fast, parallel and flexible coupled climate model

Adam T. Blaker1, Manoj Joshi2, Bablu Sinha1, David P. Stevens3, Robin S. Smith4, and Joël J.-M. Hirschi1 Adam T. Blaker et al.
  • 1National Oceanography Centre, European Way, Southampton, SO14 3ZH, UK
  • 2Climatic Research Unit, School of Environmental Sciences, University of East Anglia, Norwich, UK
  • 3Centre for Ocean and Atmospheric Sciences, School of Mathematics, University of East Anglia, Norwich, UK
  • 4NCAS, Dept. of Meteorology, University of Reading, Reading, UK

Abstract. FORTE 2.0 is an intermediate resolution coupled Ocean Atmosphere General Circulation Model (AOGCM) consisting of IGCM4, a T42 spectral atmosphere with 35 σ layers, coupled to MOMA, a 2° × 2° ocean with 15 z layer depth levels. It is capable of producing a stable climate for long integrations without the need for flux adjustments. One flexibility afforded by the IGCM4 atmosphere is the ability to configure the atmosphere with either 35 σ layers (troposphere and stratosphere) or 20 σ layers (troposphere only). This enables experimental designs for exploring the roles of the troposphere and stratosphere, and the faster integration of the 20 σ layer configuration enables longer duration studies on modest hardware. A description of FORTE 2.0 is given, followed by analysis of a 2000 year long control integration.

Adam T. Blaker et al.

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Adam T. Blaker et al.

Model code and software

FORTE 2.0: a fast, parallel and flexible coupled climate model A. T. Blaker, M. Joshi, B. Sinha, D. P. Stevens, R. S. Smith, and J. J.-M. Hirschi https://doi.org/10.5281/zenodo.3632569

Adam T. Blaker et al.

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Latest update: 28 Mar 2020
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Short summary
FORTE 2.0 is a flexible coupled atmosphere-ocean general circulation model that can be configured and run on modest hardware. We present a 2000-year long simulation which shows that FORTE 2.0 is capable of producing a stable climate. Earlier versions of FORTE were used for a wide range of studies, ranging from aquaplanet configurations to investigating the cold European winters of 2009/10. This paper introduces the updated model, for which the code and configuration are now publicly available.
FORTE 2.0 is a flexible coupled atmosphere-ocean general circulation model that can be...
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