Fig. 3: Temporal evolution of heatwave metrics from 1980 to 2014.
From: Unstable permafrost regions experience more severe heatwaves in a warming climate
The variations of a–d heatwave days (days), e–h average intensity (°C), i–l heatwave cumulative intensity (°C day), m–p the longest duration (day), and q–t the peak intensity (°C) over the Northern Hemisphere, the Arctic, the mid-latitude, and the Qinghai-Tibetan Plateau (QTP). The values represent decadal trends in summer (red) and winter (blue) heatwave metrics. Asterisks represent that the trend is statistically significant (p < 0.05). The shaded areas denote the interquartile range of heatwave metrics.
