Articles | Volume 26, issue 6
Research article
23 Mar 2022
Research article |  | 23 Mar 2022

Impact of correcting sub-daily climate model biases for hydrological studies

Mina Faghih, François Brissette, and Parham Sabeti

Data sets

ERA5 reanalysis is in production H. Hersbach and D. Dee!/dataset/reanalysisera5- single-levels?tab=form

Model code and software

GR4J Rainfall Runoff Model (Deterministic and Stochastic Methods) with Matlab T. Benkaci

Shuffled Complex Evolution (SCE-UA) Method Q. Duan

Short summary
The diurnal cycles of precipitation and temperature generated by climate models are biased. This work investigates whether or not impact modellers should correct the diurnal cycle biases prior to conducting hydrological impact studies at the sub-daily scale. The results show that more accurate streamflows are obtained when the diurnal cycles biases are corrected. This is noticeable for smaller catchments, which have a quicker reaction time to changes in precipitation and temperature.