R2 evaluation between Niño region SSTs (1+2, 3, 3.4, 4) and RAIN4PE monthly precipitation in the Piura River basin.

Authors

  • Carlos Alberto Liñan Olortegui Universidad Peruana de Ciencias Aplicadas - (PE), Perú
  • Alex Nilsson Miranda Villarroel Universidad Peruana de Ciencias Aplicadas - (PE), Perú
  • Abel Carmona Arteaga Universidad Peruana de Ciencias Aplicadas - (PE), Perú
  • Leonardo Franco Castillo Navarro Universidad Peruana de Ciencias Aplicadas - (PE), Perú
  • Franz Leonardo Pucha Cofrep Universidad Técnica Particular de Loja

DOI:

https://doi.org/10.18687/LACCEI2026.1.1.234

Keywords:

SST, RAIN4PE, precipitation, teleconnections, ENSO, Piura basin

Abstract

Sea surface temperature (SST) anomalies in the Niño 1+2 region have a direct influence on precipitation variability in the Piura River basin, often triggering high-impact hydrometeorological events. This study evaluates the sensitivity of the RAIN4PE precipitation product to these anomalies by applying the coefficient of determination (R2) to monthly time series processed in Google Earth Engine. The results indicate that RAIN4PE responds significantly to warm Niño 1+2 conditions, reaching its highest R2 values between January and March, and revealing spatial patterns consistent with the regional ENSO dynamics. Overall, the findings demonstrate that RAIN4PE is a reliable tool for monitoring precipitation in the Piura River basin and provides valuable support for teleconnection studies and climate risk management.

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Published

2026-07-27

Issue

Vol. 1 No. 14 (2026): LACCEI 2026

Section

Articles

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Copyright (c) 2026 LACCEI

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How to Cite

Liñan Olortegui, C. A., Miranda Villarroel, A. N., Carmona Arteaga, A., Castillo Navarro, L. F., & Pucha Cofrep, F. L. (2026). R2 evaluation between Niño region SSTs (1+2, 3, 3.4, 4) and RAIN4PE monthly precipitation in the Piura River basin. LACCEI, 1(14). https://doi.org/10.18687/LACCEI2026.1.1.234