Articles | Volume 17, issue 4
https://doi.org/10.5194/gmd-17-1497-2024
https://doi.org/10.5194/gmd-17-1497-2024
Development and technical paper
 | 
20 Feb 2024
Development and technical paper |  | 20 Feb 2024

Spatial spin-up of precipitation in limited-area convection-permitting simulations over North America using the CRCM6/GEM5.0 model

François Roberge, Alejandro Di Luca, René Laprise, Philippe Lucas-Picher, and Julie Thériault

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Cited articles

Ahrens, B. and Leps, N.: Sensitivity of Convection Permitting Simulations to Lateral Boundary Conditions in Idealized Experiments, J. Adv. Model. Earth Sy., 13, e2021MS002519, https://doi.org/10.1029/2021MS002519, 2021. 
Antic, S., Laprise, R., Denis, B., and de Elía, R.: Testing the downscaling ability of a one-way nested regional climate model in regions of complex topography, Clim. Dynam., 23, 473–493, https://doi.org/10.1007/s00382-004-0438-5, 2004. 
Bechtold, P., Bazile, E., Guichard, F., Mascart, P., and Richard, E.: A mass-flux convection scheme for regional and global models, Q. J. Roy. Meteor. Soc., 127, 869–886, https://doi.org/10.1002/qj.49712757309, 2001. 
Bélair, S., Mailhot, J., Girard, C., and Vaillancourt, P.: Boundary Layer and Shallow Cumulus Clouds in a Medium-Range Forecast of a Large-Scale Weather System, Mon. Weather Rev., 133, 1938–1960, https://doi.org/10.1175/MWR2958.1, 2005. 
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Short summary
Our study addresses a challenge in dynamical downscaling using regional climate models, focusing on the lack of small-scale features near the boundaries. We introduce a method to identify this “spatial spin-up” in precipitation simulations. Results show spin-up distances up to 300 km, varying by season and driving variable. Double nesting with comprehensive variables (e.g. microphysical variables) offers advantages. Findings will help optimize simulations for better climate projections.
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