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

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

doi:10.5194/gmd-18-9791-2025

Articles | Volume 18, issue 23

https://doi.org/10.5194/gmd-18-9791-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/gmd-18-9791-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 18, issue 23

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

Data sets

ERA5 hourly data on pressure levels from 1940 to present H. Hersbach et al. https://doi.org/10.24381/cds.bd0915c6

ERA5 hourly data on single levels from 1940 to present H. Hersbach et al. https://doi.org/10.24381/cds.adbb2d47

Model code and software

Precipitation Parameterizations in RegCM5 for the Upper Blue Nile Basin: Codes and data E. Keshta https://doi.org/10.5281/zenodo.14864918

RegCM-NH V5 code F. Giorgi et al. https://doi.org/10.5281/zenodo.7548172

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.