Geoscientific Model Development
Geoscientific Model Development
GMD
Articles | Volume 10, issue 2
Articles | Volume 10, issue 2
https://doi.org/10.5194/gmd-10-977-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/gmd-10-977-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Articles | Volume 10, issue 2
Development and technical paper
 | 
27 Feb 2017
Development and technical paper |  | 27 Feb 2017

On the numerical stability of surface–atmosphere coupling in weather and climate models

Anton Beljaars, Emanuel Dutra, Gianpaolo Balsamo, and Florian Lemarié

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Short summary
Coupling an atmospheric model with snow and sea ice modules presents numerical stability challenges in integrations with long time steps as commonly used for weather prediction and climate simulations. Explicit flux coupling is often applied for simplicity. In this paper a simple method is presented to stabilize the coupling without having to introduce fully implicit coupling. A formal stability analysis confirms that the method is unconditionally stable.
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