Fig. 1: Linear trends of DHW and CS, and time series of DHW based on dryness category.
From: Changes in land-atmosphere coupling increase compound drought and heatwaves over northern East Asia
Climatology of (a) dry heatwave (DHW) during warm season (MJJASO) (days year−1) and (c) soil moisture-temperature coupling strength index (CS) during summer (JJA) for the period 1980–2019 and (b), (d) their linear trends. The dots in (b) and (d) denote the 90% confidence level using the P value. Time series of (e) heatwave days based on dryness category and (f) its percentiles during the period 1980–2019 over Eats Asia [105–130°E, 45–55°N]. The dryness categories are distinguished based on scPDSI; severely dry (scPDSI < -3), dry (−3 < scPDSI < –0.5), normal (−0.5 <scPDSI <0.5), wet (0.5 <scPDSI <3), and severely wet (scPDSI >3).
