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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AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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AR: Author's response | RR: Referee report | ED: Editor decision
AR by Anna Wenzel on behalf of the Authors (27 Aug 2020)  Author's response
ED: Referee Nomination & Report Request started (12 Sep 2020) by Peter Haynes
RR by Anonymous Referee #2 (20 Sep 2020)
RR by Anonymous Referee #1 (21 Oct 2020)
ED: Reconsider after major revisions (02 Dec 2020) by Peter Haynes
AR by Anna Mirena Feist-Polner on behalf of the Authors (05 Jan 2021)  Author's response
ED: Publish subject to minor revisions (review by editor) (08 Feb 2021) by Peter Haynes
AR by Jun-Ichi Yano on behalf of the Authors (10 Feb 2021)  Author's response    Manuscript
ED: Publish as is (20 Feb 2021) by Peter Haynes
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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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