Geophysical mapping of palsa peatland permafrost
Permafrost peatlands are hydrological and biogeochemical hotspots in the discontinuous permafrost zone. Non-intrusive geophysical methods offer a possibility to map current permafrost spatial distributions in these environments. In this study, we estimate the depths to the permafrost table and base...
Published in: | The Cryosphere |
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Language: | English |
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2015
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Online Access: | https://curis.ku.dk/portal/da/publications/geophysical-mapping-of-palsa-peatland-permafrost(6f0ddd25-6ed1-4bb3-9f0d-0d03d9876495).html https://doi.org/10.5194/tc-9-465-2015 https://curis.ku.dk/ws/files/223563329/Geophysical_mapping_of_palsa_peatland_permafrost.pdf |
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ftcopenhagenunip:oai:pure.atira.dk:publications/6f0ddd25-6ed1-4bb3-9f0d-0d03d9876495 2024-05-12T08:00:03+00:00 Geophysical mapping of palsa peatland permafrost Sjöberg, Y. Marklund, P. Pettersson, R. Lyon, S. W. 2015 application/pdf https://curis.ku.dk/portal/da/publications/geophysical-mapping-of-palsa-peatland-permafrost(6f0ddd25-6ed1-4bb3-9f0d-0d03d9876495).html https://doi.org/10.5194/tc-9-465-2015 https://curis.ku.dk/ws/files/223563329/Geophysical_mapping_of_palsa_peatland_permafrost.pdf eng eng info:eu-repo/semantics/openAccess Sjöberg , Y , Marklund , P , Pettersson , R & Lyon , S W 2015 , ' Geophysical mapping of palsa peatland permafrost ' , Cryosphere , vol. 9 , no. 2 , pp. 465-478 . https://doi.org/10.5194/tc-9-465-2015 article 2015 ftcopenhagenunip https://doi.org/10.5194/tc-9-465-2015 2024-04-18T00:28:15Z Permafrost peatlands are hydrological and biogeochemical hotspots in the discontinuous permafrost zone. Non-intrusive geophysical methods offer a possibility to map current permafrost spatial distributions in these environments. In this study, we estimate the depths to the permafrost table and base across a peatland in northern Sweden, using ground penetrating radar and electrical resistivity tomography. Seasonal thaw frost tables (at ∼0.5 m depth), taliks (2.1-6.7 m deep), and the permafrost base (at ∼16 m depth) could be detected. Higher occurrences of taliks were discovered at locations with a lower relative height of permafrost landforms, which is indicative of lower ground ice content at these locations. These results highlight the added value of combining geophysical techniques for assessing spatial distributions of permafrost within the rapidly changing sporadic permafrost zone. For example, based on a back-of-the-envelope calculation for the site considered here, we estimated that the permafrost could thaw completely within the next 3 centuries. Thus there is a clear need to benchmark current permafrost distributions and characteristics, particularly in under studied regions of the pan-Arctic. Article in Journal/Newspaper Arctic Ice Northern Sweden palsa permafrost University of Copenhagen: Research Arctic The Cryosphere 9 2 465 478 |
institution |
Open Polar |
collection |
University of Copenhagen: Research |
op_collection_id |
ftcopenhagenunip |
language |
English |
description |
Permafrost peatlands are hydrological and biogeochemical hotspots in the discontinuous permafrost zone. Non-intrusive geophysical methods offer a possibility to map current permafrost spatial distributions in these environments. In this study, we estimate the depths to the permafrost table and base across a peatland in northern Sweden, using ground penetrating radar and electrical resistivity tomography. Seasonal thaw frost tables (at ∼0.5 m depth), taliks (2.1-6.7 m deep), and the permafrost base (at ∼16 m depth) could be detected. Higher occurrences of taliks were discovered at locations with a lower relative height of permafrost landforms, which is indicative of lower ground ice content at these locations. These results highlight the added value of combining geophysical techniques for assessing spatial distributions of permafrost within the rapidly changing sporadic permafrost zone. For example, based on a back-of-the-envelope calculation for the site considered here, we estimated that the permafrost could thaw completely within the next 3 centuries. Thus there is a clear need to benchmark current permafrost distributions and characteristics, particularly in under studied regions of the pan-Arctic. |
format |
Article in Journal/Newspaper |
author |
Sjöberg, Y. Marklund, P. Pettersson, R. Lyon, S. W. |
spellingShingle |
Sjöberg, Y. Marklund, P. Pettersson, R. Lyon, S. W. Geophysical mapping of palsa peatland permafrost |
author_facet |
Sjöberg, Y. Marklund, P. Pettersson, R. Lyon, S. W. |
author_sort |
Sjöberg, Y. |
title |
Geophysical mapping of palsa peatland permafrost |
title_short |
Geophysical mapping of palsa peatland permafrost |
title_full |
Geophysical mapping of palsa peatland permafrost |
title_fullStr |
Geophysical mapping of palsa peatland permafrost |
title_full_unstemmed |
Geophysical mapping of palsa peatland permafrost |
title_sort |
geophysical mapping of palsa peatland permafrost |
publishDate |
2015 |
url |
https://curis.ku.dk/portal/da/publications/geophysical-mapping-of-palsa-peatland-permafrost(6f0ddd25-6ed1-4bb3-9f0d-0d03d9876495).html https://doi.org/10.5194/tc-9-465-2015 https://curis.ku.dk/ws/files/223563329/Geophysical_mapping_of_palsa_peatland_permafrost.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Ice Northern Sweden palsa permafrost |
genre_facet |
Arctic Ice Northern Sweden palsa permafrost |
op_source |
Sjöberg , Y , Marklund , P , Pettersson , R & Lyon , S W 2015 , ' Geophysical mapping of palsa peatland permafrost ' , Cryosphere , vol. 9 , no. 2 , pp. 465-478 . https://doi.org/10.5194/tc-9-465-2015 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-9-465-2015 |
container_title |
The Cryosphere |
container_volume |
9 |
container_issue |
2 |
container_start_page |
465 |
op_container_end_page |
478 |
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1798841740428312576 |