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Environmental and Earth Sciences Proceedings
Volume 32
Issue 1
10.3390/eesp2025032017
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Proceeding Paper

Performance Evaluation of the ERA5, MERRA-2, and PERSIANN-CDR Gridded Products in the Tambo Basin †

by
Cristhian Apaza-Vilca
1,*,
Maria Liz Mamani-Yupanqui
1,* and
Efrain Lujano
1,2,*
1
Escuela Profesional de Ingeniería Agrícola, Universidad Nacional del Altiplano, Puno 21001, Peru
2
Instituto Nacional de Investigación en Glaciares y Ecosistemas de Montaña, Huaraz 02002, Peru
*
Authors to whom correspondence should be addressed.
†
Presented at the 8th International Electronic Conference on Water Sciences, 14–16 October 2024; Available online: https://sciforum.net/event/ECWS-8.
Environ. Earth Sci. Proc. 2025, 32(1), 17; https://doi.org/10.3390/eesp2025032017
Published: 22 April 2025
(This article belongs to the Proceedings of The 8th International Electronic Conference on Water Sciences)
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Abstract

Gridded meteorological data help to address the scarcity of data in sparse hydrometeorological networks, but their validation is crucial. This study evaluated the performance of ERA5, MERRA-2, and PERSIANN-CDR gridded products in the Tambo basin, comparing their data with meteorological stations and basin-wide averages using the Pearson correlation coefficient (CC), percent bias (PBIAS), and root mean square error (RMSE). PERSIANN-CDR showed the best performance (CC: 0.84–0.94, PBIAS: 6.90–83.10%, RMSE: 21.97–38.78 mm/month). MERRA-2 underestimated precipitation, while ERA5, despite its high correlation (CC: 0.83–0.94), overestimated it. PERSIANN-CDR is the recommended product for the region, providing a better representation of precipitation for hydrological studies and water resource management.
Keywords: ERA5; gridded meteorological data; MERRA-2; PERSIANN-CDR; reanalysis products ERA5; gridded meteorological data; MERRA-2; PERSIANN-CDR; reanalysis products

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MDPI and ACS Style

Apaza-Vilca, C.; Mamani-Yupanqui, M.L.; Lujano, E. Performance Evaluation of the ERA5, MERRA-2, and PERSIANN-CDR Gridded Products in the Tambo Basin. Environ. Earth Sci. Proc. 2025, 32, 17. https://doi.org/10.3390/eesp2025032017

AMA Style

Apaza-Vilca C, Mamani-Yupanqui ML, Lujano E. Performance Evaluation of the ERA5, MERRA-2, and PERSIANN-CDR Gridded Products in the Tambo Basin. Environmental and Earth Sciences Proceedings. 2025; 32(1):17. https://doi.org/10.3390/eesp2025032017

Chicago/Turabian Style

Apaza-Vilca, Cristhian, Maria Liz Mamani-Yupanqui, and Efrain Lujano. 2025. "Performance Evaluation of the ERA5, MERRA-2, and PERSIANN-CDR Gridded Products in the Tambo Basin" Environmental and Earth Sciences Proceedings 32, no. 1: 17. https://doi.org/10.3390/eesp2025032017

APA Style

Apaza-Vilca, C., Mamani-Yupanqui, M. L., & Lujano, E. (2025). Performance Evaluation of the ERA5, MERRA-2, and PERSIANN-CDR Gridded Products in the Tambo Basin. Environmental and Earth Sciences Proceedings, 32(1), 17. https://doi.org/10.3390/eesp2025032017

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