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Open AccessFeature PaperArticle

Sentinel-1 InSAR Measurements of Elevation Changes over Yedoma Uplands on Sobo-Sise Island, Lena Delta

by Jie Chen 1,2,3,*, Frank Günther 4, Guido Grosse 4,5, Lin Liu 2 and Hui Lin 1,3,6,*
1
Institute of Space and Earth Information Science, The Chinese University of Hong Kong, 999077 Hong Kong, China
2
Earth System Science Programme, Faculty of Science, The Chinese University of Hong Kong, 999077 Hong Kong, China
3
Shenzhen Research Institute, The Chinese University of Hong Kong, 518172 Shenzhen, China
4
Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, 14473 Potsdam, Germany
5
Institute of Earth and Environmental Sciences, University of Potsdam, 14476 Potsdam, Germany
6
Department of Geography and Resource Management, The Chinese University of Hong Kong, 999077 Hong Kong, China
*
Authors to whom correspondence should be addressed.
Remote Sens. 2018, 10(7), 1152; https://doi.org/10.3390/rs10071152
Received: 31 May 2018 / Revised: 15 July 2018 / Accepted: 20 July 2018 / Published: 21 July 2018
(This article belongs to the Special Issue Remote Sensing of Dynamic Permafrost Regions)
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. View Full-Text
Keywords: Sentinel-1 InSAR; Yedoma uplands; Sobo-Sise Island; summer heave; permafrost thaw subsidence; active layer Sentinel-1 InSAR; Yedoma uplands; Sobo-Sise Island; summer heave; permafrost thaw subsidence; active layer
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MDPI and ACS Style

Chen, J.; Günther, F.; Grosse, G.; Liu, L.; Lin, H. Sentinel-1 InSAR Measurements of Elevation Changes over Yedoma Uplands on Sobo-Sise Island, Lena Delta. Remote Sens. 2018, 10, 1152.

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