Reconstruction of the Standardized Precipitation-Evapotranspiration Index for the Western Region of Durango State, Mexico

In recent decades, droughts associated with climate change have increased in frequency and intensity. Given this trend, the understanding of variability over time has raised great interest. The main objective study was to reconstruct standardized precipitation-evapotranspiration index (SPEI) from tree rings Pinus durangensis Martinez at a representative site western region Durango State, Mexico. To end, we used radii 286 cross-sections, which were processed through conventional dendrochronological techniques. addition, chronologies total ring early latewood generated, covering 296 years. parallel, analyzed association between obtained cumulative SPEI for 3, 6, 9, 12 months. earlywood residual chronology (EWres) showed closest six-month February–May (SPEI6FM). Thus, SPEI6FM past years reconstructed simple linear regression model. reconstruction, 18% wet, 16% dry, 66% average. an increase observed 1880 onwards, might been related rise temperature due warming. Therefore, annual P. are suitable use as proxy reconstruction historical climatic events northern