Global disparities in rural and urban population exposure to compound drought and heatwave events.

This study analyzed CDHWs exposure in both rural and urban populations and found that the number of people chronically exposed to CDHWs has shown a clear upward trend over time. The findings reveal a significant upward trend in global terrestrial CDHWs, accompanied by consistent spatiotemporal patterns. However, the occurrence of CDHWs identified using SPEI is notably higher than that identified using scPDSI, highlighting differences arising from the indices' formulations and sensitivities to climatic variables. The SPEI incorporates both precipitation and potential evapotranspiration (PET), rendering it more responsive to temperature fluctuations, especially in warmer climates



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