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2020-02-21Zeitschriftenartikel DOI: 10.1002/esp.4833
Multitemporal terrestrial laser scanning point clouds for thaw subsidence observation at Arctic permafrost monitoring sites
dc.contributor.authorAnders, Katharina
dc.contributor.authorMarx, Sabrina
dc.contributor.authorBoike, Julia
dc.contributor.authorHerfort, Benjamin
dc.contributor.authorWilcox, Evan J
dc.contributor.authorLanger, Moritz
dc.contributor.authorMarsh, Philip
dc.contributor.authorHöfle, Bernhard
dc.date.accessioned2022-08-04T11:35:51Z
dc.date.available2022-08-04T11:35:51Z
dc.date.issued2020-02-21none
dc.date.updated2020-11-02T20:48:17Z
dc.identifier.urihttp://edoc.hu-berlin.de/18452/25740
dc.description.abstractThis paper investigates different methods for quantifying thaw subsidence using terrestrial laser scanning (TLS) point clouds. Thaw subsidence is a slow (millimetre to centimetre per year) vertical displacement of the ground surface common in ice-rich permafrost-underlain landscapes. It is difficult to quantify thaw subsidence in tundra areas as they often lack stable reference frames. Also, there is no solid ground surface to serve as a basis for elevation measurements, due to a continuous moss–lichen cover. We investigate how an expert-driven method improves the accuracy of benchmark measurements at discrete locations within two sites using multitemporal TLS data of a 1-year period. Our method aggregates multiple experts’ determination of the ground surface in 3D point clouds, collected in a web-based tool. We then compare this to the performance of a fully automated ground surface determination method. Lastly, we quantify ground surface displacement by directly computing multitemporal point cloud distances, thereby extending thaw subsidence observation to an area-based assessment. Using the expert-driven quantification as reference, we validate the other methods, including in-situ benchmark measurements from a conventional field survey. This study demonstrates that quantifying the ground surface using 3D point clouds is more accurate than the field survey method. The expert-driven method achieves an accuracy of 0.1 ± 0.1 cm. Compared to this, in-situ benchmark measurements by single surveyors yield an accuracy of 0.4 ± 1.5 cm. This difference between the two methods is important, considering an observed displacement of 1.4 cm at the sites. Thaw subsidence quantification with the fully automatic benchmark-based method achieves an accuracy of 0.2 ± 0.5 cm and direct point cloud distance computation an accuracy of 0.2 ± 0.9 cm. The range in accuracy is largely influenced by properties of vegetation structure at locations within the sites. The developed methods enable a link of automated quantification and expert judgement for transparent long-term monitoring of permafrost subsidence.eng
dc.description.sponsorshipGerman Federal Ministry of Economics and Technology (BMWi) and German Aerospace Center (DLR)
dc.description.sponsorshipHeidelberg Graduate School of Mathematical and Computational Methods for the Sciences, University of Heidelberg http://dx.doi.org/10.13039/501100003801
dc.description.sponsorshipFederal Ministry of Economics and Technology (BMWi) and the German Aerospace Centre (DLR), Germany http://dx.doi.org/10.13039/501100002765
dc.language.isoengnone
dc.publisherHumboldt-Universität zu Berlin
dc.rights(CC BY-NC 4.0) Attribution-NonCommercial 4.0 Internationalger
dc.rights.urihttps://creativecommons.org/licenses/by-nc/4.0/
dc.subjectchange analysiseng
dc.subject3D geoinformationeng
dc.subjectground surface displacementeng
dc.subjectpermafrost monitoringeng
dc.subjectmultitemporal LiDAReng
dc.subject.ddc910 Geografie und Reisennone
dc.titleMultitemporal terrestrial laser scanning point clouds for thaw subsidence observation at Arctic permafrost monitoring sitesnone
dc.typearticle
dc.identifier.urnurn:nbn:de:kobv:11-110-18452/25740-0
dc.identifier.doi10.1002/esp.4833none
dc.identifier.doihttp://dx.doi.org/10.18452/25057
dc.type.versionpublishedVersionnone
local.edoc.container-titleEarth Surface Processes and Landformsnone
local.edoc.pages12none
local.edoc.type-nameZeitschriftenartikel
local.edoc.institutionMathematisch-Naturwissenschaftliche Fakultätnone
local.edoc.container-typeperiodical
local.edoc.container-type-nameZeitschrift
local.edoc.container-publisher-nameWileynone
local.edoc.container-publisher-placeNew York, NY [u.a.]none
local.edoc.container-volume45none
local.edoc.container-issue7none
local.edoc.container-firstpage1589none
local.edoc.container-lastpage1600none
dc.description.versionPeer Reviewednone
dc.identifier.eissn1096-9837

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