Permafrost degradation at two monitored palsa mires in north-west Finland
Funding Information: This research has been supported by the Vilho, Yrjö and Kalle Väisälä Foundation of the Finnish Academy of Science and Letters, EU Horizon 2020 Research and Innovation Programme (grant no. 869471), the Academy of Finland (grant no. 330319, 338480, and 346602), and the Erasmus+ s...
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ftaaltouniv:oai:aaltodoc.aalto.fi:123456789/121294 2024-04-28T07:53:13+00:00 Permafrost degradation at two monitored palsa mires in north-west Finland Verdonen, Mariana Störmer, Alexander Lotsari, Eliisa Korpelainen, Pasi Burkhard, Benjamin Colpaert, Alfred Kumpula, Timo Department of Built Environment Water and Environmental Eng. University of Eastern Finland Leibniz Universität Hannover Aalto-yliopisto Aalto University 2023-05-01 17 1803-1819 application/pdf https://aaltodoc.aalto.fi/handle/123456789/121294 https://doi.org/10.5194/tc-17-1803-2023 en eng Copernicus GmbH CRYOSPHERE Volume 17, issue 5 Verdonen, M, Störmer, A, Lotsari, E, Korpelainen, P, Burkhard, B, Colpaert, A & Kumpula, T 2023, ' Permafrost degradation at two monitored palsa mires in north-west Finland ', CRYOSPHERE, vol. 17, no. 5, pp. 1803-1819 . https://doi.org/10.5194/tc-17-1803-2023 1994-0416 1994-0424 PURE UUID: a2b5f445-5b05-471d-a936-dc49e90b947b PURE ITEMURL: https://research.aalto.fi/en/publications/a2b5f445-5b05-471d-a936-dc49e90b947b PURE LINK: http://www.scopus.com/inward/record.url?scp=85159309837&partnerID=8YFLogxK PURE FILEURL: https://research.aalto.fi/files/112709211/tc_17_1803_2023_1.pdf https://aaltodoc.aalto.fi/handle/123456789/121294 URN:NBN:fi:aalto-202306073675 doi:10.5194/tc-17-1803-2023 openAccess A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä publishedVersion 2023 ftaaltouniv https://doi.org/10.5194/tc-17-1803-2023 2024-04-03T17:06:50Z Funding Information: This research has been supported by the Vilho, Yrjö and Kalle Väisälä Foundation of the Finnish Academy of Science and Letters, EU Horizon 2020 Research and Innovation Programme (grant no. 869471), the Academy of Finland (grant no. 330319, 338480, and 346602), and the Erasmus+ staff mobility programme. Publisher Copyright: © Author(s) 2023. Palsas and peat plateaus are expected to disappear from many regions, including Finnish Lapland. However, detailed long-Term monitoring data of the degradation process on palsas are scarce. Here, we present the results of the aerial photography time series analysis (1959-2021), annual real-Time kinematic (RTK) GNSS and active layer monitoring (2007-2021), and annual unoccupied aerial system surveys (2016-2021) at two palsa sites (Peera and Laassaniemi, 68gN) located in north-west Finland. We analysed temporal trends of palsa degradation and their relation to climate using linear regression. At both sites, the decrease in palsa area by-77g€¯% to-90g€¯% since 1959 and height by-16g€¯% to-49g€¯% since 2007 indicate substantial permafrost degradation throughout the study periods. The area loss rates are mainly connected to winter air temperature changes at Peera and winter precipitation changes at Laassaniemi. The active layer thickness (ALT) has varied annually between 2007 and 2021 with no significant trend and is related mainly to the number of very warm days during summer, autumn rainfall of previous year, and snow depths at Peera. At Laassaniemi, the ALT is weakly related to climate and has been decreasing in the middle part of the palsa during the past 8 years despite the continuous decrease in palsa volume. Our findings imply that the ALT in the inner parts of palsas do not necessarily reflect the overall permafrost conditions and underline the importance of surface position monitoring alongside the active layer measurements. The results also showed a negative relationship between the ALT and snow cover onset, indicating the complexity of ... Article in Journal/Newspaper Active layer monitoring Active layer thickness palsa palsas Peat permafrost Lapland Aalto University Publication Archive (Aaltodoc) The Cryosphere 17 5 1803 1819 |
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Aalto University Publication Archive (Aaltodoc) |
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English |
description |
Funding Information: This research has been supported by the Vilho, Yrjö and Kalle Väisälä Foundation of the Finnish Academy of Science and Letters, EU Horizon 2020 Research and Innovation Programme (grant no. 869471), the Academy of Finland (grant no. 330319, 338480, and 346602), and the Erasmus+ staff mobility programme. Publisher Copyright: © Author(s) 2023. Palsas and peat plateaus are expected to disappear from many regions, including Finnish Lapland. However, detailed long-Term monitoring data of the degradation process on palsas are scarce. Here, we present the results of the aerial photography time series analysis (1959-2021), annual real-Time kinematic (RTK) GNSS and active layer monitoring (2007-2021), and annual unoccupied aerial system surveys (2016-2021) at two palsa sites (Peera and Laassaniemi, 68gN) located in north-west Finland. We analysed temporal trends of palsa degradation and their relation to climate using linear regression. At both sites, the decrease in palsa area by-77g€¯% to-90g€¯% since 1959 and height by-16g€¯% to-49g€¯% since 2007 indicate substantial permafrost degradation throughout the study periods. The area loss rates are mainly connected to winter air temperature changes at Peera and winter precipitation changes at Laassaniemi. The active layer thickness (ALT) has varied annually between 2007 and 2021 with no significant trend and is related mainly to the number of very warm days during summer, autumn rainfall of previous year, and snow depths at Peera. At Laassaniemi, the ALT is weakly related to climate and has been decreasing in the middle part of the palsa during the past 8 years despite the continuous decrease in palsa volume. Our findings imply that the ALT in the inner parts of palsas do not necessarily reflect the overall permafrost conditions and underline the importance of surface position monitoring alongside the active layer measurements. The results also showed a negative relationship between the ALT and snow cover onset, indicating the complexity of ... |
author2 |
Department of Built Environment Water and Environmental Eng. University of Eastern Finland Leibniz Universität Hannover Aalto-yliopisto Aalto University |
format |
Article in Journal/Newspaper |
author |
Verdonen, Mariana Störmer, Alexander Lotsari, Eliisa Korpelainen, Pasi Burkhard, Benjamin Colpaert, Alfred Kumpula, Timo |
spellingShingle |
Verdonen, Mariana Störmer, Alexander Lotsari, Eliisa Korpelainen, Pasi Burkhard, Benjamin Colpaert, Alfred Kumpula, Timo Permafrost degradation at two monitored palsa mires in north-west Finland |
author_facet |
Verdonen, Mariana Störmer, Alexander Lotsari, Eliisa Korpelainen, Pasi Burkhard, Benjamin Colpaert, Alfred Kumpula, Timo |
author_sort |
Verdonen, Mariana |
title |
Permafrost degradation at two monitored palsa mires in north-west Finland |
title_short |
Permafrost degradation at two monitored palsa mires in north-west Finland |
title_full |
Permafrost degradation at two monitored palsa mires in north-west Finland |
title_fullStr |
Permafrost degradation at two monitored palsa mires in north-west Finland |
title_full_unstemmed |
Permafrost degradation at two monitored palsa mires in north-west Finland |
title_sort |
permafrost degradation at two monitored palsa mires in north-west finland |
publisher |
Copernicus GmbH |
publishDate |
2023 |
url |
https://aaltodoc.aalto.fi/handle/123456789/121294 https://doi.org/10.5194/tc-17-1803-2023 |
genre |
Active layer monitoring Active layer thickness palsa palsas Peat permafrost Lapland |
genre_facet |
Active layer monitoring Active layer thickness palsa palsas Peat permafrost Lapland |
op_relation |
CRYOSPHERE Volume 17, issue 5 Verdonen, M, Störmer, A, Lotsari, E, Korpelainen, P, Burkhard, B, Colpaert, A & Kumpula, T 2023, ' Permafrost degradation at two monitored palsa mires in north-west Finland ', CRYOSPHERE, vol. 17, no. 5, pp. 1803-1819 . https://doi.org/10.5194/tc-17-1803-2023 1994-0416 1994-0424 PURE UUID: a2b5f445-5b05-471d-a936-dc49e90b947b PURE ITEMURL: https://research.aalto.fi/en/publications/a2b5f445-5b05-471d-a936-dc49e90b947b PURE LINK: http://www.scopus.com/inward/record.url?scp=85159309837&partnerID=8YFLogxK PURE FILEURL: https://research.aalto.fi/files/112709211/tc_17_1803_2023_1.pdf https://aaltodoc.aalto.fi/handle/123456789/121294 URN:NBN:fi:aalto-202306073675 doi:10.5194/tc-17-1803-2023 |
op_rights |
openAccess |
op_doi |
https://doi.org/10.5194/tc-17-1803-2023 |
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The Cryosphere |
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17 |
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