Articles | Volume 18, issue 23
https://doi.org/10.5194/gmd-18-9791-2025
https://doi.org/10.5194/gmd-18-9791-2025
Model evaluation paper
 | 
09 Dec 2025
Model evaluation paper |  | 09 Dec 2025

Comparison of precipitation parameterizations in Regional Climate Model (RegCM5): a case study of the Upper Blue Nile Basin (UBNB)

Eatemad Keshta, Doaa Amin, Ashraf M. ElMoustafa, and Mohamed A. Gad

Cited articles

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Abtew, W., Melesse, A. M., and Dessalegne, T.: El Niño Southern Oscillation link to the Blue Nile River Basin hydrology, Hydrol. Process., 23, 3653–3660, 2009. 
Amin, D. and Kotb, A.: Assessment of the Skill of Seasonal Meteorological Forecasts in the Eastern Nile, Nile Water Science & Engineering Journal, 8, 31–40, 2015. 
Birhan, M. W., Raju, U. J. P., and Kenea, S. T.: Estimating the role of upper Blue Nile basin moisture budget and recycling ratio in spatiotemporal precipitation distributions, J. Atmos. Sol. Terr. Phys., 193, 105064, https://doi.org/10.1016/j.jastp.2019.105064, 2019. 
Bretherton, C. S., McCaa, J. R., and Grenier, H.: A New Parameterization for Shallow Cumulus Convection and Its Application to Marine Subtropical Cloud-Topped Boundary Layers. Part I: Description and 1D Results, Mon. Weather Rev., 132, 864–882, 2004. 
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Short summary
Regional Climate Model version 5 (RegCM5) reasonably reproduced the dominant spatiotemporal pattern of annual precipitation over the basin using the Emanuel convective scheme with the Nogherotto–Tompkins (NoTo) large-scale scheme. Using the MOLOCH non-hydrostatic dynamical core is recommended in future research for improving precipitation simulation and assessing the impacts of land-use change, due to dam-induced reservoirs on local climate.
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