Articles | Volume 19, issue 17
Atmos. Chem. Phys., 19, 11383–11399, 2019
https://doi.org/10.5194/acp-19-11383-2019
Atmos. Chem. Phys., 19, 11383–11399, 2019
https://doi.org/10.5194/acp-19-11383-2019

Research article 10 Sep 2019

Research article | 10 Sep 2019

A double ITCZ phenomenology of wind errors in the equatorial Atlantic in seasonal forecasts with ECMWF models

Jonathan K. P. Shonk et al.

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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 Jon Shonk on behalf of the Authors (17 May 2019)  Author's response    Manuscript
ED: Referee Nomination & Report Request started (06 Jun 2019) by Timothy J. Dunkerton
RR by Anonymous Referee #1 (14 Jun 2019)
RR by Anonymous Referee #2 (25 Jun 2019)
ED: Publish as is (10 Aug 2019) by Timothy J. Dunkerton
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Short summary
Modern climate models are affected by systematic biases that harm their ability to produce reliable seasonal forecasts and climate projections. In this study, we investigate causes of biases in wind patterns over the tropical Atlantic during northern spring in three related models. We find that the wind biases are associated with an increase in excess rainfall and convergence in the tropical western Atlantic at the start of April, leading to the redirection of trade winds away from the Equator.
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