Hydrology and Earth System Sciences
Hydrology and Earth System Sciences
HESS
Articles | Volume 29, issue 18
Articles | Volume 29, issue 18
https://doi.org/10.5194/hess-29-4637-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/hess-29-4637-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 29, issue 18
Research article
 | 
25 Sep 2025
Research article |  | 25 Sep 2025

Evaluation of hydroclimatic biases in the Community Earth System Model (CESM1) within the Mississippi River basin

Michelle O'Donnell, Kelsey Murphy, James Doss-Gollin, Sylvia Dee, and Samuel Munoz

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Short summary
We investigate the skill of the Community Earth System Model version 1 (CESM1) in simulating hydrologic processes over the Mississippi River basin. Simulated discharge is seasonally delayed relative to observations: model biases are diagnosed using variables from reanalysis data and attributed primarily to precipitation and runoff related processes. We also show that the seasonality of simulated runoff in several Coupled Model Intercomparison Phase 6 (CMIP6) models is improved relative to CESM1.
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