Interannual variability of ground surface thermal regimes in Livingston and Deception islands, Antarctica (2007–2021)
The absence of vegetation in most ice-free areas of Antarctica makes the soil surface very sensitive to atmosphere dynamics, especially in the western sector of the Antarctic Peninsula, an area within the limits of the permafrost zone. To evaluate the possible effects of regional warming on frozen s...
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Online Access: | http://hdl.handle.net/10451/60162 https://doi.org/10.1002/ldr.4922 |
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ftunivlisboa:oai:repositorio.ul.pt:10451/60162 2023-12-03T10:13:50+01:00 Interannual variability of ground surface thermal regimes in Livingston and Deception islands, Antarctica (2007–2021) Pablo, M. A. de Ramos, M. Vieira, Gonçalo Molina, A. Ramos, R. Maior, C. N. Prieto, M. Ruiz‐Fernández, J. 2023-11-06T12:43:19Z http://hdl.handle.net/10451/60162 https://doi.org/10.1002/ldr.4922 eng eng Wiley PERMAMODEL PERMAPLANET PERMASNOW PID2020-115269GBI00 CTM2011-15565-E https://onlinelibrary.wiley.com/doi/10.1002/ldr.4922 Pablo, M. A. de, Ramos, M., Vieira, G., Molina, A., Ramos, R., Maior, C. N., Prieto, M., & Ruiz-Fernández, J. (2023). Interannual variability of ground surface thermal regimes in Livingston and Deception islands, Antarctica (2007–2021). Land Degradation & Development, 1–16. https://doi.org/10.1002/ldr.4922 http://hdl.handle.net/10451/60162 doi:10.1002/ldr.4922 1099-145X openAccess http://creativecommons.org/licenses/by/4.0/ Active layer Antarctica Ground surface temperature Permafrost Snow thermal regime article 2023 ftunivlisboa https://doi.org/10.1002/ldr.4922 2023-11-08T01:07:39Z The absence of vegetation in most ice-free areas of Antarctica makes the soil surface very sensitive to atmosphere dynamics, especially in the western sector of the Antarctic Peninsula, an area within the limits of the permafrost zone. To evaluate the possible effects of regional warming on frozen soils, we conducted an analysis of ground surface temperatures (GSTs) from 2007 to 2021 from different monitoring sites in Livingston and Deception islands (South Shetlands archipelago, Antarctica). The analysis of the interannual evolution of the GST and their daily regimes and the freezing and thawing indexes reveals that climate change is showing impacts on seasonal and perennially frozen soils. Freezing Degree Days (FDD) have decreased while Thawing Degree Day (TDD) have increased during the study period, resulting in a balance that is already positive at the sites at lower elevations. Daily freeze–thaw cycles have been rare and absent since 2014. Meanwhile, the most common thermal regimes are purely frozen – F1 (daily temperatures < = 0.5C), isothermal – IS (ranging between 0.5C to +0.5C), and purely thawed – T1 (> = +0.5C). A decrease in F1 days has been observed, while the IS and T1 days increased by about 60 days between 2007 and 2021. The annual number of days with snow cover increased between 2009 and 2014 and decreased since then. The GST and the daily thermal regimes evolution point to general heating, which may be indicative of the degradation of the frozen soils in the study area. Ministry of Economy of the Government of Spain; PERMAMODEL, Grant/Award Number: POL2006-01918; PERMAPLANET, Grant/Award Number: CTM2009-10165; PERMASNOW, Grant/Award Number: CTM2014-52021-R; PARANTAR, Grant/Award Number: PID2020-115269GBI00; ANTARPERMA, Grant/Award Number: CTM2011-15565-E info:eu-repo/semantics/publishedVersion Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Ice permafrost Universidade de Lisboa: repositório.UL Antarctic The Antarctic Antarctic Peninsula Land Degradation & Development |
institution |
Open Polar |
collection |
Universidade de Lisboa: repositório.UL |
op_collection_id |
ftunivlisboa |
language |
English |
topic |
Active layer Antarctica Ground surface temperature Permafrost Snow thermal regime |
spellingShingle |
Active layer Antarctica Ground surface temperature Permafrost Snow thermal regime Pablo, M. A. de Ramos, M. Vieira, Gonçalo Molina, A. Ramos, R. Maior, C. N. Prieto, M. Ruiz‐Fernández, J. Interannual variability of ground surface thermal regimes in Livingston and Deception islands, Antarctica (2007–2021) |
topic_facet |
Active layer Antarctica Ground surface temperature Permafrost Snow thermal regime |
description |
The absence of vegetation in most ice-free areas of Antarctica makes the soil surface very sensitive to atmosphere dynamics, especially in the western sector of the Antarctic Peninsula, an area within the limits of the permafrost zone. To evaluate the possible effects of regional warming on frozen soils, we conducted an analysis of ground surface temperatures (GSTs) from 2007 to 2021 from different monitoring sites in Livingston and Deception islands (South Shetlands archipelago, Antarctica). The analysis of the interannual evolution of the GST and their daily regimes and the freezing and thawing indexes reveals that climate change is showing impacts on seasonal and perennially frozen soils. Freezing Degree Days (FDD) have decreased while Thawing Degree Day (TDD) have increased during the study period, resulting in a balance that is already positive at the sites at lower elevations. Daily freeze–thaw cycles have been rare and absent since 2014. Meanwhile, the most common thermal regimes are purely frozen – F1 (daily temperatures < = 0.5C), isothermal – IS (ranging between 0.5C to +0.5C), and purely thawed – T1 (> = +0.5C). A decrease in F1 days has been observed, while the IS and T1 days increased by about 60 days between 2007 and 2021. The annual number of days with snow cover increased between 2009 and 2014 and decreased since then. The GST and the daily thermal regimes evolution point to general heating, which may be indicative of the degradation of the frozen soils in the study area. Ministry of Economy of the Government of Spain; PERMAMODEL, Grant/Award Number: POL2006-01918; PERMAPLANET, Grant/Award Number: CTM2009-10165; PERMASNOW, Grant/Award Number: CTM2014-52021-R; PARANTAR, Grant/Award Number: PID2020-115269GBI00; ANTARPERMA, Grant/Award Number: CTM2011-15565-E info:eu-repo/semantics/publishedVersion |
format |
Article in Journal/Newspaper |
author |
Pablo, M. A. de Ramos, M. Vieira, Gonçalo Molina, A. Ramos, R. Maior, C. N. Prieto, M. Ruiz‐Fernández, J. |
author_facet |
Pablo, M. A. de Ramos, M. Vieira, Gonçalo Molina, A. Ramos, R. Maior, C. N. Prieto, M. Ruiz‐Fernández, J. |
author_sort |
Pablo, M. A. de |
title |
Interannual variability of ground surface thermal regimes in Livingston and Deception islands, Antarctica (2007–2021) |
title_short |
Interannual variability of ground surface thermal regimes in Livingston and Deception islands, Antarctica (2007–2021) |
title_full |
Interannual variability of ground surface thermal regimes in Livingston and Deception islands, Antarctica (2007–2021) |
title_fullStr |
Interannual variability of ground surface thermal regimes in Livingston and Deception islands, Antarctica (2007–2021) |
title_full_unstemmed |
Interannual variability of ground surface thermal regimes in Livingston and Deception islands, Antarctica (2007–2021) |
title_sort |
interannual variability of ground surface thermal regimes in livingston and deception islands, antarctica (2007–2021) |
publisher |
Wiley |
publishDate |
2023 |
url |
http://hdl.handle.net/10451/60162 https://doi.org/10.1002/ldr.4922 |
geographic |
Antarctic The Antarctic Antarctic Peninsula |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice permafrost |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice permafrost |
op_relation |
PERMAMODEL PERMAPLANET PERMASNOW PID2020-115269GBI00 CTM2011-15565-E https://onlinelibrary.wiley.com/doi/10.1002/ldr.4922 Pablo, M. A. de, Ramos, M., Vieira, G., Molina, A., Ramos, R., Maior, C. N., Prieto, M., & Ruiz-Fernández, J. (2023). Interannual variability of ground surface thermal regimes in Livingston and Deception islands, Antarctica (2007–2021). Land Degradation & Development, 1–16. https://doi.org/10.1002/ldr.4922 http://hdl.handle.net/10451/60162 doi:10.1002/ldr.4922 1099-145X |
op_rights |
openAccess http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/ldr.4922 |
container_title |
Land Degradation & Development |
_version_ |
1784260782119190528 |