ORIGINAL RESEARCH
Hot Extremes and Climatological Drought
Indicators in the Transitional Semiarid-Subtropical
Region of Sinaloa, Northwest Mexico
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1
Instituto Politécnico Nacional (CIIDIR-SINALOA), Mexico
2
Universidad Estatal de Sonora (UES), Mexico
3
Centro de Investigaciones Biológicas del Noroeste (CIBNOR), Mexico
Submission date: 2022-01-14
Final revision date: 2022-04-08
Acceptance date: 2022-05-07
Online publication date: 2022-08-30
Publication date: 2022-09-28
Pol. J. Environ. Stud. 2022;31(5):4567-4577
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ABSTRACT
The main goal of this study was to explore the historical and recent spatial concurrence between
the frequency (F), duration (D) and intensity (I) of hot extremes (HEs) and the frequency and evolution
of meteorological drought in the region of Sinaloa. Based on the values of daily maximum temperature
(Tmax) and precipitation obtained from CLImate COMputing for the interval April–October of a
historical period (1963–2000) and a recent period (1982–2014), the HE and the standardized precipitation
index (SPI) were calculated on one-month (SPI-1) and four-month (SPI-4) timescales. Spearman rank
correlation coefficients (Sr) were used to obtain the significant concurrences (SCs) between HEs and
SPI-1, and HEs and SPI-4. El Quelite weather station showed the highest historical SCs between HEs
and SPI-1 (−0.66≤Sr≤−0.57). Jaina is the only station that showed SCs with all four indicators of HEs
and SPI-4 (−0.47≤Sr≤−0.34). In this study, the concurrence between HEs and SPI-1, and HEs and SPI-4
was determined for the first time. These are phenomena that can decrease the crop yield, particularly for
rainfed crops such as maize, sesame and sorghum in the region commonly known as “the breadbasket
of Mexico”.