Hydrology and Earth System Sciences
Hydrology and Earth System Sciences
HESS
Articles | Volume 30, issue 21
Articles | Volume 30, issue 21
https://doi.org/10.5194/hess-30-6927-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/hess-30-6927-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 30, issue 21
Research article
 | 
10 Nov 2026
Research article |  | 10 Nov 2026

Evaluation of sub-daily precipitation variability and its diurnal characteristics in satellite and reanalysis datasets against ground-based observations

Gyuyeon Choi, Eunkyo Seo, and Paul A. Dirmeyer

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Short summary
This study evaluates five satellite and four reanalysis products against 6,824 ground-based observations for diurnal cycle fidelity. Satellites show a 1–2 hour phase delay due to upper-level ice detection, while reanalyses peak 3–6 hours early from premature convective onset. These contrasting performances are linked to specific design choices in retrieval algorithms and convective parameterization, offering physically grounded guidance for dataset selection in hydrological and climate studies.
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