Articles | Volume 21, issue 6
Atmos. Chem. Phys., 21, 4759–4778, 2021
https://doi.org/10.5194/acp-21-4759-2021
Atmos. Chem. Phys., 21, 4759–4778, 2021
https://doi.org/10.5194/acp-21-4759-2021
Research article
26 Mar 2021
Research article | 26 Mar 2021

Sensitivities of the Madden–Julian oscillation forecasts to configurations of physics in the ECMWF global model

Jun-Ichi Yano and Nils P. Wedi

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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.
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