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Towards a Monitorin...
Towards a Monitoring Approach for Understanding Permafrost Degradation and Linked Subsidence in Arctic Peatlands
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- de la Barreda-Bautista, Betsabe (author)
- School of Biosciences, University of Nottingham, Sutton Bonington, Loughborough, United Kingdom; School of Geography, University of Nottingham, University Park, Nottingham, United Kingdom
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- Boyd, Doreen S. (author)
- School of Geography, University of Nottingham, Nottingham, United Kingdom
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- Ledger, Martha (author)
- School of Biosciences, University of Nottingham, Sutton Bonington, Loughborough, United Kingdom
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- Siewert, Matthias B. (author)
- Umeå universitet,Institutionen för ekologi, miljö och geovetenskap
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- Chandler, Chris (author)
- School of Geography, University of Nottingham, Nottingham, United Kingdom
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- Bradley, Andrew V. (author)
- Department of Chemical and Environmental Engineering, Faculty of Engineering, Nottingham Geospatial Institute, Nottingham, United Kingdom
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- Gee, David (author)
- Department of Chemical and Environmental Engineering, Faculty of Engineering, University of Nottingham, Nottingham, United Kingdom
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- Large, David J. (author)
- Department of Chemical and Environmental Engineering, Faculty of Engineering, Nottingham Geospatial Institute, Nottingham, United Kingdom; Department of Chemical and Environmental Engineering, Faculty of Engineering, University of Nottingham, Nottingham, United Kingdom
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- Olofsson, Johan (author)
- Umeå universitet,Institutionen för ekologi, miljö och geovetenskap
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- Sowter, Andrew (author)
- Terra Motion Ltd, Ingenuity Centre, Nottingham, United Kingdom
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- Sjögersten, Sofie (author)
- School of Biosciences, University of Nottingham, Sutton Bonington, Loughborough, United Kingdom
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(creator_code:org_t)
- 2022-01-18
- 2022
- English.
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In: Remote Sensing. - : MDPI. - 2072-4292. ; 14:3
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Abstract
Subject headings
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- Permafrost thaw resulting from climate warming is threatening to release carbon from high latitude peatlands. The aim of this research was to determine subsidence rates linked to permafrost thaw in sub-Arctic peatlands in Sweden using historical orthophotographic (orthophotos), Unoccupied Aerial Vehicle (UAV), and Interferometric Synthetic Aperture Radar (InSAR) data. The orthophotos showed that the permafrost palsa on the study sites have been contracting in their areal extent, with the greatest rates of loss between 2002 and 2008. The surface motion estimated from differential digital elevation models from the UAV data showed high levels of subsidence (maxi-mum of −25 cm between 2017 and 2020) around the edges of the raised palsa plateaus. The InSAR data analysis showed that raised palsa areas had the greatest subsidence rates, with maximum subsidence rates of 1.5 cm between 2017 and 2020; however, all wetland vegetation types showed sub-sidence. We suggest that the difference in spatial units associated with each sensor explains parts of the variation in the subsidence levels recorded. We conclude that InSAR was able to identify the areas most at risk of subsidence and that it can be used to investigate subsidence over large spatial extents, whereas UAV data can be used to better understand the dynamics of permafrost degradation at a local level. These findings underpin a monitoring approach for these peatlands.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Naturgeografi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Physical Geography (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Klimatforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Climate Research (hsv//eng)
Keyword
- InSAR
- Peatland
- Permafrost
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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de la Barreda-Ba ...
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Boyd, Doreen S.
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Ledger, Martha
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Siewert, Matthia ...
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Chandler, Chris
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Bradley, Andrew ...
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show more...
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Gee, David
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Large, David J.
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Olofsson, Johan
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Sowter, Andrew
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Sjögersten, Sofi ...
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Physical Geograp ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Climate Research
- Articles in the publication
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Remote Sensing
- By the university
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Umeå University