Show simple item record

dc.contributor.authorRouyet, Line
dc.contributor.authorLauknes, Tom Rune
dc.contributor.authorChristiansen, Hanne H
dc.contributor.authorStrand, Sarah Marie
dc.contributor.authorLarsen, Yngvar
dc.date.accessioned2020-02-06T11:16:46Z
dc.date.available2020-02-06T11:16:46Z
dc.date.issued2019-06-19
dc.description.abstractNordenskiöld Land in Central Spitsbergen, Svalbard is characterized as a high latitude, high relief periglacial landscape with permafrost occurring both in mountains and lowlands. Freezing and thawing of the active layer causes seasonal frost heave and thaw subsidence, while permafrost-related mass-wasting processes induce downslope ground displacements on valley sides. Displacement rate varies spatially and temporally depending on environmental factors. In our study, we apply Satellite Synthetic Aperture Radar Interferometry (InSAR) to investigate the magnitude, spatial distribution and timing of seasonal ground displacements in and around Adventdalen using TerraSAR-X StripMap Mode (2009–2017) and Sentinel-1 Interferometric Wide Swath Mode (2015–2017) SAR images. First, we show that InSAR results from both sensors highlight consistent patterns and provide a comprehensive overview of the distribution of displacement rates. Secondly, two-dimensional (2D) TerraSAR-X InSAR results from combined ascending and descending geometries document the spatial variability of the vertical and east-west horizontal displacement rates for an average of nine thawing seasons. The remote sensing results are compared to a simplified geomorphological map enabling the identification of specific magnitudes and orientations of displacements for 14 selected geomorphological units. Finally, June to December 2017 6-day sampling interval Sentinel-1 time series was retrieved and compared to active layer ground temperatures from two boreholes. The timing of the subsidence and heave detected by InSAR matches the thawing and freeze-back periods measured by in-situ sensors. Our results highlight the value of InSAR to obtain landscape scale knowledge about the seasonal dynamics of complex periglacial environments.en_US
dc.identifier.citationRouyet L, Lauknes TRL, Christiansen HH, Strand SM, Larsen Y. Seasonal dynamics of a permafrost landscape, Adventdalen, Svalbard, investigated by InSAR. Remote Sensing of Environment. 2019;231:1-17en_US
dc.identifier.cristinIDFRIDAID 1711125
dc.identifier.doi10.1016/j.rse.2019.111236
dc.identifier.issn0034-4257
dc.identifier.issn1879-0704
dc.identifier.urihttps://hdl.handle.net/10037/17337
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.relation.ispartofRouyet, L. (2021). Ground Dynamics in the Norwegian Periglacial Environment Investigated by Synthetic Aperture Radar Interferometry. (Doctoral thesis). <a href=https://hdl.handle.net/10037/22231>https://hdl.handle.net/10037/22231</a>.
dc.relation.journalRemote Sensing of Environment
dc.relation.projectIDNorges forskningsråd: 263005en_US
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/ROMFORSK/263005/Norway/FrostInSAR: Upscaling the investigation of periglacial landforms in the Norwegian Arctic using Synthetic Aperture Radar Interferometry/FrostInSAR/en_US
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/ROMFORSK/212022/Norway/PermaSAR: SAR detection of permafrost landscape changes in northern Norway and on Svalbard/PermaSAR/en_US
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2019 The Author(s)en_US
dc.subjectVDP::Mathematics and natural science: 400::Geosciences: 450en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Geofag: 450en_US
dc.titleSeasonal dynamics of a permafrost landscape, Adventdalen, Svalbard, investigated by InSARen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


File(s) in this item

Thumbnail

This item appears in the following collection(s)

Show simple item record