Vertical movements of frost mounds in subarctic permafrost regions analyzed using geodetic survey and satellite interferometry

Beck, Inga; Ludwig, Ralf; Bernier, Monique; Strozzi, Tazio; Boike, Julia

doi:10.5194/esurf-3-409-2015

Cited by 28 publications

(20 citation statements)

References 43 publications

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“…X-band data have so far been used to investigate surface deformations like thaw subsidence and frost heave (Beck et al, 2015;Zhang et al, 2016;Wang et al, 2016), to monitor tundra shrub growth (Duguay et al, 2015) or to date drained thermokarst lake basins (Regmi et al, 2012) related to permafrost research. Backscatter information from data of the TerraSAR-X mission have been used for this study.…”

Section: X-band Datamentioning

confidence: 99%

Active-layer thickness estimation from X-band SAR backscatter intensity

et al. 2017

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Abstract. The active layer above the permafrost, which seasonally thaws during summer, is an important parameter for monitoring the state of permafrost. Its thickness is typically measured locally, but a range of methods which utilize information from satellite data exist. Mostly, the normalized difference vegetation index (NDVI) obtained from optical satellite data is used as a proxy. The applicability has been demonstrated mostly for shallow depths of active-layer thickness (ALT) below approximately 70 cm. Some permafrost areas including central Yamal are, however, characterized by larger ALT. Surface properties including vegetation structure are also represented by microwave backscatter intensity. So far, the potential of such data for estimating ALT has not been explored. We therefore investigated the relationship between ALT and X-band synthetic aperture radar (SAR) backscatter of TerraSAR-X (averages for 10 × 10 m window) in order to examine the possibility of delineating ALT with continuous and larger spatial coverage in this area and compare it to the already-established method of using NDVI from Landsat (30 m). Our results show that the mutual dependency of ALT and TerraSAR-X backscatter on land cover types suggests a connection of both parameters. A range of 5 dB can be observed for an ALT range of 100 cm (40-140 cm), and an R 2 of 0.66 has been determined over the calibration sites. An increase of ALT with increasing backscatter can be determined. The root mean square error (RMSE) over a comparably heterogeneous validation site with maximum ALT of > 150 cm is 20 cm. Deviations are larger for measurement locations with mixed vegetation types (especially partial coverage by cryptogam crust) with respect to the spatial resolution of the satellite data.

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Section: X-band Datamentioning

confidence: 99%

Active-layer thickness estimation from X-band SAR backscatter intensity

et al. 2017

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“…The technique is well established for slope instabilities such as landslides and rock glaciers (Strozzi et al, 2004;Barboux et al, 2012;Lilleøren et al, 2013). The understanding of radar interferometric signals due to permafrost surface heave and subsidence needs further research to separate this signal from many other influences on measurements of the distance between the satellite instrument and the ground, such as snow cover or radar penetration into vegetation and ground (Liu et al, 2010;Beck et al, 2015aBeck et al, , 2015b.…”

Section: Surface Deformationmentioning

confidence: 99%

Detection and Analysis of Ground Deformation in Permafrost Environments

Arenson

Kääb

O’Sullivan

2016

Permafrost & Periglacial

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In situ monitoring of periglacial dynamics is essential for the study of periglacial morphology and the design of mitigation and adaptation measures for infrastructure in permafrost zones. Evaluation of future effects of climate change on and from the periglacial environment requires understanding of surficial and internal deformation processes. Monitoring of internal deformation is still uncommon, primarily because of high costs. By contrast, major advancements in remote‐sensing technologies allow detailed assessment of surface deformation for large study areas. Technological advancements are anticipated to enhance spatial and temporal resolution, lighten sensors and improve unmanned aerial vehicles technology. The last of these will facilitate and reduce costs for data collection in remote areas under harsh climatic conditions. Increasing application of Structure‐from‐Motion, a photogrammetric image analysis technique, is anticipated, due to its precision, resolution, ease of usage and low cost. Copyright © 2016 John Wiley & Sons, Ltd.

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“…However, the usage of DInSAR can be limited due to interferometric phase decorrelation (e.g. Beck et al, 2015;Antonova et al, 2016) as well as atmospheric effects (e.g. Short et 10 al., 2011).…”

Section: Introductionmentioning

confidence: 99%

“…Little et al, 2003;Shiklomanov et al, 2013;Beck et al, 2015;Streletskiy et al, 2016) or thaw-tubes (e.g. Nixon et al, 2003;Short et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Terrestrial laser scanning for quantifying small-scale vertical movements of the ground surface in Artic permafrost regions

Marx

Anders

Antonova

et al. 2017

Preprint

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Abstract. Three-dimensional data acquired by terrestrial laser scanning (TLS) provides an accurate representation of Earth's surface, which is commonly used to detect and quantify topographic changes on a small scale. However, in Arctic permafrost regions the tundra vegetation and the micro-topography have significant effects on the surface representation in the captured dataset. The resulting spatial sampling of the ground is never identical between two TLS surveys. Thus, monitoring of heave and subsidence in the context of permafrost processes are challenging. This study evaluates TLS for quantifying small-scale 15 vertical movements in an area located within the continuous permafrost zone, 50 km north-east of Inuvik, Northwest Territories, Canada. We propose a novel filter strategy, which accounts for spatial sampling effects and identifies TLS points suitable for multi-temporal deformation analyses. Further important prerequisites must be met, such as accurate co-registration of the TLS datasets. We found that if the ground surface is captured by more than one TLS scan position, plausible subsidence rates (up to mm-scale) can be derived; compared to e.g. standard raster-based DEM difference maps which contain change 20 rates strongly affected by sampling effects.

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Vertical movements of frost mounds in subarctic permafrost regions analyzed using geodetic survey and satellite interferometry

Cited by 28 publications

References 43 publications

Active-layer thickness estimation from X-band SAR backscatter intensity

Active-layer thickness estimation from X-band SAR backscatter intensity

Detection and Analysis of Ground Deformation in Permafrost Environments

Terrestrial laser scanning for quantifying small-scale vertical movements of the ground surface in Artic permafrost regions

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