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. Widespread thawing of permafrost in the northern Eurasiancontinent causes severe problems for infrastructure and global climate. Wetest the potential of Sentinel-1 SAR imagery to enhance detection ofpermafrost surface changes in the Siberian lowlands of the northern Eurasiancontinent at the Yamal peninsula site. We used InSAR time-series techniqueto detect seasonal surface movements related to permafrost active layerchanges. The satellite InSAR time-series analysis has detected continuousmovements, subsidence in three zones, which have occurred during the timeperiod from 2017 to 2018. Observed subsidence zones show up to 180 mm yr −1 rates of seasonal active layers changes. These seasonal ground displacementpatterns align well with lithology and linked to anthropogenic impact on thepermafrost surface changes in the area. The results show that Sentinel-1mission is of great importance for the longer-term monitoring of activelayer thickening in permafrost regions. The combined analyses of theobtained InSAR time series with additional field observations may supportregular process monitoring as part of a global warming risk assessment.

Permafrost seasonal surface changes revealed from Sentinel-1 InSAR time-series, Yamal peninsula