Articles | Volume 13, issue 10
https://doi.org/10.5194/gmd-13-4749-2020
https://doi.org/10.5194/gmd-13-4749-2020
Model evaluation paper
 | 
02 Oct 2020
Model evaluation paper |  | 02 Oct 2020

Role of atmospheric horizontal resolution in simulating tropical and subtropical South American precipitation in HadGEM3-GC31

Paul-Arthur Monerie, Amulya Chevuturi, Peter Cook, Nicholas P. Klingaman, and Christopher E. Holloway

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Cited articles

Bacmeister, J. T., Wehner, M. F., Neale, R. B., Gettelman, A., Hannay, C., Lauritzen, P. H., Caron, J. M., and Truesdale, J. E.: Exploratory High-Resolution Climate Simulations using the Community Atmosphere Model (CAM), J. Climate, 27, 3073–3099, https://doi.org/10.1175/JCLI-D-13-00387.1, 2013. 
Bombardi, R. J. and Carvalho, L. M. V: IPCC global coupled model simulations of the South America monsoon system, Clim. Dynam., 33, 893, https://doi.org/10.1007/s00382-008-0488-1, 2008. 
Bombardi, R. J., Trenary, L., Pegion, K., Cash, B., DelSole, T., and Kinter III, J. L.: Seasonal Predictability of Summer Rainfall over South America, J. Climate., 31, 8181–8195, https://doi.org/10.1175/JCLI-D-18-0191.1, 2018. 
Chevuturi, A.: “asop_duration” – Wet-spell and dry-spell duration, GitHub, available at: https://github.com/nick-klingaman/dubstep/tree/master/asop_duration, last access: January 2020. 
Chevuturi, A., Klingaman, N. P., and Martin, G.: nick-klingaman/dubstep: Initial DUBSTEP project release (Version v0.1), Zenodo, https://doi.org/10.5281/zenodo.3997114, 2020. 
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Short summary
In this study, we assess how increasing the horizontal resolution of HadGEM3-GC31 can allow simulating better tropical and subtropical South American precipitation. We compare simulations of HadGEM3-GC3.1, performed at three different horizontal resolutions. We show that increasing resolution allows decreasing precipitation biases over the Andes and northeast Brazil and improves the simulation of daily precipitation distribution.
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