Articles | Volume 21, issue 6
https://doi.org/10.5194/acp-21-4759-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-21-4759-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
26 Mar 2021
Research article |
| 26 Mar 2021
| 26 Mar 2021
Sensitivities of the Madden–Julian oscillation forecasts to configurations of physics in the ECMWF global model
Jun-Ichi Yano
CORRESPONDING AUTHOR
CNRM, UMR 3589 (CNRS), Météo-France, 31057 Toulouse CEDEX, France
Nils P. Wedi
European Centre for Medium-Range Weather Forecasts, Reading, UK
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Short summary
Sensitivities of forecasts of the Madden–Julian oscillation (MJO) to various different configurations of the physics are examined with the global model of ECMWF's Integrated Forecasting System (IFS). The motivation for the study was to simulate the MJO as a nonlinear free wave. To emulate free dynamics in the IFS,
various momentum dissipation terms (
friction) as well as diabatic heating were selectively turned off over the tropics for the range of the latitudes from 20° S to 20° N.
Sensitivities of forecasts of the Madden–Julian oscillation (MJO) to various different...
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