Sentinel-1 InSAR Measurements of Elevation Changes over Yedoma Uplands on Sobo-Sise Island, Lena Delta
- 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 theYedoma-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.…
Author details: | Jie ChenORCiD, Frank GüntherORCiD, Guido GrosseORCiDGND, Lin LiuORCiD, Hui Lin |
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DOI: | https://doi.org/10.3390/rs10071152 |
ISSN: | 2072-4292 |
Title of parent work (English): | Remote sensing |
Publisher: | MDPI |
Place of publishing: | Basel |
Publication type: | Article |
Language: | English |
Date of first publication: | 2018/07/21 |
Publication year: | 2018 |
Release date: | 2021/11/12 |
Tag: | Sentinel-1 InSAR; Sobo-Sise Island; Yedoma uplands; active layer; permafrost thaw subsidence; summer heave |
Volume: | 10 |
Issue: | 7 |
Number of pages: | 16 |
Funding institution: | National Key Basic Research Program of ChinaNational Basic Research Program of China [2015CB954103]; Hong Kong Research Grants CouncilHong Kong Research Grants Council [CUHK14233016, CUHK24300414, G-CUHK403/15]; DAADDeutscher Akademischer Austausch Dienst (DAAD) [57216164]; ERC PETA-CARB [338335]; ESA GlobPermafrost |
Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät |
DDC classification: | 6 Technik, Medizin, angewandte Wissenschaften / 62 Ingenieurwissenschaften / 620 Ingenieurwissenschaften und zugeordnete Tätigkeiten |
License (German): | CC-BY - Namensnennung 4.0 International |
External remark: | Zweitveröffentlichung in der Schriftenreihe Postprints der Universität Potsdam :[Mathematisch-Naturwissenschaftliche Reihe]; [690] |