Fig. 7
From: Extremes of summer climate trigger thousands of thermokarst landslides in a High Arctic environment
Lake colour change due to retrogressive thaw slump activity. a Annually resolved time series of numbers of lakes visually changing colour (from dark blue to turquoise or beige) observed for Banks Island (1984–2016) using Timelapse. b, c Individual lake colour change from 1984 to 2016 due to retrogressive thaw slumps becoming active around the shoreline (73.08°N 117.67°W). d, e Example of the development of a new bay in a lake due to retrogressive thaw slump activity (71.65°N 121.91°W). More than 200 m of shoreline recession occurred from 2000–2016. Red circles in (c and e) are locations of retrogressive thaw slumps which became active during the Timelapse period
