Seminar by Line Rouyet, Researcher, NORCE.
The potential of InSAR products as climate change indicators in permafrost regions
Abstract: Satellite Synthetic Aperture Radar Interferometry (InSAR) is a remote sensing technique allowing for the large-scale detection of ground surface displacements at centimetre to submillimetre accuracy.
In permafrost lowlands, InSAR can document frost heave and thaw subsidence patterns associated with the formation and melt of ground ice in the active and transient layers. Evidenced relations between displacement patterns, ground temperature and ice content have shown the potential of using InSAR to document parameters related to the ground thermal regime.
In cold-climate mountains, permafrost landforms are creeping down the slope under the effect of the gravity. Rock glaciers are typical evidence of past or present permafrost in mountains and InSAR can contribute to inventorying their distribution and activity. Active rock glaciers have downslope creep rates from cm/yr to several m/yr. As they tend to accelerate under warmer conditions, rock glacier velocity (RGV) has been recently accepted by GCOS as a new product of the ECV Permafrost. In this context, InSAR has the potential to monitor RGV over many landforms within large regions all around the globe.
In this presentation, I will introduce and discuss the current state-of-the-art, ongoing research and identified challenges to exploit InSAR products as climate change indicators both in permafrost lowlands and in cold-climate mountains.
The talk is in Aud 2 in the Geology Building. It is also possible to follow at Zoom.
Videolink to the lecture will be sent to the mailinglists alle@geo and geohyd-info@geo. If you want to subscribe to the geohyd-info@geo list send an email to Anita.
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About the seminar
This seminar is offered by the Section for Geography and Hydrology, Dept. of Geosciences, University of Oslo. The GEOHYD-seminars are announced as lunch seminars so bring your lunch if you want to.
The seminars are open for everyone interested, and especially students are welcome.
The Lunch Seminar Team
– Louise and Henning