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Sentinel-1 InSAR Measurements of Elevation Changes over Yedoma Uplands on Sobo-Sise Island, Lena Delta
- Source :
- EPIC3Remote Sensing, MDPI, 10(7), pp. 1152, ISSN: 2072-4292, Remote Sensing; Volume 10; Issue 7; Pages: 1152
- Publication Year :
- 2018
- Publisher :
- MDPI, 2018.
-
Abstract
- Yedoma—extremely ice-rich permafrost with massive ice wedges formed during the Late Pleistocene—is vulnerable to thawing and degradation under climate warming. Thawing of ice-rich Yedoma results in lowering of surface elevations. Quantitative knowledge about surface elevation changes helps us to understand the freeze-thaw processes of the active layer and the potential degradation of Yedoma deposits. In this study, we use C-band Sentinel-1 InSAR measurements to map the elevation changes over ice-rich Yedoma uplands on Sobo-Sise Island, Lena Delta with frequent revisit observations (as short as six or 12 days). We observe significant seasonal thaw subsidence during summer months and heterogeneous inter-annual elevation changes from 2016–17. We also observe interesting patterns of stronger seasonal thaw subsidence on elevated flat Yedoma uplands by comparing to the surrounding Yedoma slopes. Inter-annual analyses from 2016–17 suggest that our observed positive surface elevation changes are likely caused by the delayed progression of the thaw season in 2017, associated with mean annual air temperature fluctuations.
- Subjects :
- Delta
010504 meteorology & atmospheric sciences
Global warming
0211 other engineering and technologies
Yedoma
Elevation
Subsidence
02 engineering and technology
15. Life on land
Permafrost
01 natural sciences
Sentinel-1 InSAR
Yedoma uplands
Sobo-Sise Island
summer heave
permafrost thaw subsidence
active layer
13. Climate action
Air temperature
Interferometric synthetic aperture radar
General Earth and Planetary Sciences
Physical geography
ddc:620
Mathematisch-Naturwissenschaftliche Fakultät
Geology
021101 geological & geomatics engineering
0105 earth and related environmental sciences
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- EPIC3Remote Sensing, MDPI, 10(7), pp. 1152, ISSN: 2072-4292, Remote Sensing; Volume 10; Issue 7; Pages: 1152
- Accession number :
- edsair.doi.dedup.....7e17fb60f1fa60cd9201cc370109ed7a