Increased Compound Droughts and Heatwaves in a Double Pack in Central Asia

Compound droughts and heatwaves (CDHWs) are likely to cause more severe natural disasters than a single extreme event, they have been exacerbated by rapid global warming. Based on high-resolution grid data, this study combines the daily-scale ERA5-Land dataset monthly-scale SPEI with multiple indicators analyze CDHWs. We calculated analyzed temporal spatial modal distribution of CDHWs in Central Asia from 1981 2018, paper, we discuss sequence relationship between drought events, heatwave The results show that number region increased over time expanded terms area, especially eastern southwestern Asia. tsum (total frequency CDHWs) was 0.5 times higher total it at rate 0.17/yr. maximum duration tmax (maximum days) 17 days. Furthermore, occurrence 96.67%, AH (CDHWs’ accumulated heat) had 97.78%, which, upon examination trend pattern, accounted for largest increase area. also found TAH average temperature anomalies, < ?0.5) shows obvious seasonality, increases winter spring being significantly greater summer autumn. intensity stronger anomaly 0.4–0.8 °C, there north–south pattern across region. In northwestern Asia, (SPEI 15–30 per year average. During transition base period reference period, 25%, dry days prior decreased 7.35 conclusion our can provide theoretical basis coping climate change arid zones.