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dc.date.accessioned2015-02-24T10:27:13Z
dc.date.available2015-02-24T10:27:13Z
dc.date.created2014-06-25T15:43:09Z
dc.date.issued2014
dc.identifier.citationKääb, Andreas Girod, Luc Maurice Ramuntcho Berthling, Ivar Thoralf . Surface kinematics of periglacial sorted circles using structure-from-motion technology. The Cryosphere. 2014, 8, 1041-1056
dc.identifier.urihttp://hdl.handle.net/10852/42557
dc.description.abstractSorted soil circles are a form of periglacial patterned ground that is commonly noted for its striking geometric regularity. They consist of an inner fine domain bordered by gravel rings that rise some decimetres above the fine domain. Field measurements and numerical modelling suggest that these features develop from a convection-like circulation of soil in the active layer of permafrost. The related cyclic burial and exhumation of material is believed to play an important role in the soil carbon cycle of high latitudes. The connection of sorted circles to permafrost conditions and its changes over time make these ground forms potential palaeoclimatic indicators. In this study, we apply for the first time photogrammetric structure-from-motion technology (SfM) to large sets of overlapping terrestrial photos taken in August 2007 and 2010 over three sorted circles at Kvadehuksletta, western Spitsbergen. We retrieve repeat digital elevation models (DEMs) and orthoimages with millimetre resolution and precision. Changes in microrelief over the 3 yr are obtained from DEM differencing and horizontal displacement fields from tracking features between the orthoimages. In the fine domain, surface material moves radially outward at horizontal rates of up to ~2 cm yr-1. The coarse stones on the inner slopes of the gravel rings move radially inward at similar rates. A number of substantial deviations from this overall radial symmetry, both in horizontal displacements and in microrelief, shed new light on the spatio-temporal evolution of sorted soil circles, and potentially of periglacial patterned ground in general.en_US
dc.languageEN
dc.language.isoenen_US
dc.publisherNational Snow and Ice Data Center
dc.rightsAttribution 3.0 Unported
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/
dc.titleSurface kinematics of periglacial sorted circles using structure-from-motion technologyen_US
dc.typeJournal articleen_US
dc.creator.authorKääb, Andreas
dc.creator.authorGirod, Luc Maurice Ramuntcho
dc.creator.authorBerthling, Ivar Thoralf
cristin.unitcode185,15,22,0
cristin.unitnameInstitutt for geofag
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1
dc.identifier.cristin1140765
dc.identifier.bibliographiccitationinfo:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=The Cryosphere&rft.volume=8&rft.spage=1041&rft.date=2014
dc.identifier.jtitleThe Cryosphere
dc.identifier.volume8
dc.identifier.startpage1041
dc.identifier.endpage1056
dc.identifier.doihttp://dx.doi.org/10.5194/tc-8-1041-2014
dc.identifier.urnURN:NBN:no-46945
dc.type.documentTidsskriftartikkelen_US
dc.type.peerreviewedPeer reviewed
dc.source.issn1994-0416
dc.identifier.fulltextFulltext https://www.duo.uio.no/bitstream/handle/10852/42557/1/tc-8-1041-2014.pdf
dc.type.versionPublishedVersion


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