TY  - GEN
A1  - Chen, Jie
A1  - Günther, Frank
A1  - Grosse, Guido
A1  - Liu, Lin
A1  - Lin, Hui
T1  - Sentinel-1 InSAR Measurements of Elevation Changes over Yedoma Uplands on Sobo-Sise Island, Lena Delta
T2  - Postprints der Universität Potsdam Mathematisch-Naturwissenschaftliche Reihe
N2  - 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.
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 690 
KW  - Sentinel-1 InSAR
KW  - Yedoma uplands
KW  - Sobo-Sise Island
KW  - summer heave
KW  - permafrost thaw subsidence
KW  - active layer
Y1  - 2019
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/42680
UR  - https://nbn-resolving.org/urn:nbn:de:kobv:517-opus4-426807
SN  - 1866-8372
IS  - 690
ER  -