11:00 AM - 11:15 AM
[STT54-08] InSAR measurement of ground subsidence at permafrost areas: preliminary results
Keywords:permafrost, InSAR, thermokarst, ground subsidence, ionosphere
Liu et al. (2015, JGR-ES) suggested that satellite synthetic aperture radar interferometry (InSAR) could reveal on-going subsiding signals around thermokarst, which could tell us the dynamic processes and thus the mechanisms responsible for on-going permafrost thawing, using satellite remote sensing.
Meanwhile, at Yamal Peninsula, northern Siberia, four caldera-like collapsed topographies were discovered, whose maximum diameter and depth reach 37 meter and 70 meter, respectively. These sudden collapses are attributed to the rapid thawing of permafrost due to the anomalously high air-temperature in recent years.
Given these backgrounds, we have performed InSAR measurements over Yamal Peninsula to examine if any ground deformation has been on-going. We will report and disucss our preliminary results and isssues.