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dc.date.accessioned2019-12-05T20:55:39Z
dc.date.available2019-12-05T20:55:39Z
dc.date.created2019-01-14T16:00:11Z
dc.date.issued2018
dc.identifier.citationAntonova, Sofia Sudhaus, Henriette Strozzi, Tazio Zwieback, Simon Kääb, Andreas Heim, Birgit Langer, Moritz Bornemann, Niko Boike, Julia . Thaw subsidence of a Yedoma landscape in Northern Siberia, measured in situ and estimated from TerraSAR-X interferometry. Remote Sensing. 2018
dc.identifier.urihttp://hdl.handle.net/10852/71251
dc.description.abstractIn permafrost areas, seasonal freeze-thaw cycles result in upward and downward movements of the ground. For some permafrost areas, long-term downward movements were reported during the last decade. We measured seasonal and multi-year ground movements in a yedoma region of the Lena River Delta, Siberia, in 2013–2017, using reference rods installed deep in the permafrost. The seasonal subsidence was 1.7 ± 1.5 cm in the cold summer of 2013 and 4.8 ± 2 cm in the warm summer of 2014. Furthermore, we measured a pronounced multi-year net subsidence of 9.3 ± 5.7 cm from spring 2013 to the end of summer 2017. Importantly, we observed a high spatial variability of subsidence of up to 6 cm across a sub-meter horizontal scale. In summer 2013, we accompanied our field measurements with Differential Synthetic Aperture Radar Interferometry (DInSAR) on repeat-pass TerraSAR-X (TSX) data from the summer of 2013 to detect summer thaw subsidence over the same study area. Interferometry was strongly affected by a fast phase coherence loss, atmospheric artifacts, and possibly the choice of reference point. A cumulative ground movement map, built from a continuous interferogram stack, did not reveal a subsidence on the upland but showed a distinct subsidence of up to 2 cm in most of the thermokarst basins. There, the spatial pattern of DInSAR-measured subsidence corresponded well with relative surface wetness identified with the near infra-red band of a high-resolution optical image. Our study suggests that (i) although X-band SAR has serious limitations for ground movement monitoring in permafrost landscapes, it can provide valuable information for specific environments like thermokarst basins, and (ii) due to the high sub-pixel spatial variability of ground movements, a validation scheme needs to be developed and implemented for future DInSAR studies in permafrost environments.
dc.languageEN
dc.publisherMDPI AG
dc.rightsAttribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleThaw subsidence of a Yedoma landscape in Northern Siberia, measured in situ and estimated from TerraSAR-X interferometry
dc.typeJournal article
dc.creator.authorAntonova, Sofia
dc.creator.authorSudhaus, Henriette
dc.creator.authorStrozzi, Tazio
dc.creator.authorZwieback, Simon
dc.creator.authorKääb, Andreas
dc.creator.authorHeim, Birgit
dc.creator.authorLanger, Moritz
dc.creator.authorBornemann, Niko
dc.creator.authorBoike, Julia
cristin.unitcode185,15,22,60
cristin.unitnameSeksjon for naturgeografi og hydrologi
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1
dc.identifier.cristin1656592
dc.identifier.bibliographiccitationinfo:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Remote Sensing&rft.volume=&rft.spage=&rft.date=2018
dc.identifier.jtitleRemote Sensing
dc.identifier.volume10
dc.identifier.issue4
dc.identifier.doihttps://doi.org/10.3390/rs10040494
dc.identifier.urnURN:NBN:no-74327
dc.type.documentTidsskriftartikkel
dc.type.peerreviewedPeer reviewed
dc.source.issn2072-4292
dc.identifier.fulltextFulltext https://www.duo.uio.no/bitstream/handle/10852/71251/1/remotesensing-10-00494.pdf
dc.type.versionPublishedVersion
cristin.articleid494


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