Transition from a Subaerial to a Subnival Permafrost Temperature Regime Following Increased Snow Cover (Livingston Island, Maritime Antarctic)
The Antarctic Peninsula (AP) region has been one of the regions on Earth with strongest warming since 1950. However, the northwest of the AP showed a cooling from 2000 to 2015, which had local consequences with an increase in snow accumulation and a deceleration in the loss of mass from glaciers. In...
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ftdoajarticles:oai:doaj.org/article:e809566496cf42c399b67cfa3faea4a1 2023-05-15T13:03:16+02:00 Transition from a Subaerial to a Subnival Permafrost Temperature Regime Following Increased Snow Cover (Livingston Island, Maritime Antarctic) Miguel Ramos Gonçalo Vieira Miguel Angel de Pablo Antonio Molina Juan Javier Jimenez 2020-12-01T00:00:00Z https://doi.org/10.3390/atmos11121332 https://doaj.org/article/e809566496cf42c399b67cfa3faea4a1 EN eng MDPI AG https://www.mdpi.com/2073-4433/11/12/1332 https://doaj.org/toc/2073-4433 doi:10.3390/atmos11121332 2073-4433 https://doaj.org/article/e809566496cf42c399b67cfa3faea4a1 Atmosphere, Vol 11, Iss 1332, p 1332 (2020) permafrost active layer snow thickness enthalpy Meteorology. Climatology QC851-999 article 2020 ftdoajarticles https://doi.org/10.3390/atmos11121332 2022-12-31T04:02:32Z The Antarctic Peninsula (AP) region has been one of the regions on Earth with strongest warming since 1950. However, the northwest of the AP showed a cooling from 2000 to 2015, which had local consequences with an increase in snow accumulation and a deceleration in the loss of mass from glaciers. In this paper, we studied the effects of increased snow accumulation in the permafrost thermal regime in two boreholes (PG1 and PG2) in Livingston Island, South Shetlands Archipelago, from 2009 to 2015. The two boreholes located c. 300 m apart but at similar elevation showed different snow accumulation, with PG2 becoming completely covered with snow all year long, while the other remained mostly snow free during the summer. The analysis of the thermal regimes and of the estimated soil surface energy exchange during the study period showed the effects of snow insulation in reducing the active layer thickness. These effects were especially relevant in PG2, which transitioned from a subaerial to a subnival regime. There, permafrost aggraded from below, with the active layer completely disappearing and the efficiency of thermal insulation by the snowpack prevailing in the thermal regime. This situation may be used as an analogue for the transition from a periglacial to a subglacial environment in longer periods of cooling in the paleoenvironmental record. Article in Journal/Newspaper Active layer thickness Antarc* Antarctic Antarctic Peninsula Livingston Island permafrost Directory of Open Access Journals: DOAJ Articles Antarctic Antarctic Peninsula Livingston Island ENVELOPE(-60.500,-60.500,-62.600,-62.600) The Antarctic Atmosphere 11 12 1332 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
permafrost active layer snow thickness enthalpy Meteorology. Climatology QC851-999 |
spellingShingle |
permafrost active layer snow thickness enthalpy Meteorology. Climatology QC851-999 Miguel Ramos Gonçalo Vieira Miguel Angel de Pablo Antonio Molina Juan Javier Jimenez Transition from a Subaerial to a Subnival Permafrost Temperature Regime Following Increased Snow Cover (Livingston Island, Maritime Antarctic) |
topic_facet |
permafrost active layer snow thickness enthalpy Meteorology. Climatology QC851-999 |
description |
The Antarctic Peninsula (AP) region has been one of the regions on Earth with strongest warming since 1950. However, the northwest of the AP showed a cooling from 2000 to 2015, which had local consequences with an increase in snow accumulation and a deceleration in the loss of mass from glaciers. In this paper, we studied the effects of increased snow accumulation in the permafrost thermal regime in two boreholes (PG1 and PG2) in Livingston Island, South Shetlands Archipelago, from 2009 to 2015. The two boreholes located c. 300 m apart but at similar elevation showed different snow accumulation, with PG2 becoming completely covered with snow all year long, while the other remained mostly snow free during the summer. The analysis of the thermal regimes and of the estimated soil surface energy exchange during the study period showed the effects of snow insulation in reducing the active layer thickness. These effects were especially relevant in PG2, which transitioned from a subaerial to a subnival regime. There, permafrost aggraded from below, with the active layer completely disappearing and the efficiency of thermal insulation by the snowpack prevailing in the thermal regime. This situation may be used as an analogue for the transition from a periglacial to a subglacial environment in longer periods of cooling in the paleoenvironmental record. |
format |
Article in Journal/Newspaper |
author |
Miguel Ramos Gonçalo Vieira Miguel Angel de Pablo Antonio Molina Juan Javier Jimenez |
author_facet |
Miguel Ramos Gonçalo Vieira Miguel Angel de Pablo Antonio Molina Juan Javier Jimenez |
author_sort |
Miguel Ramos |
title |
Transition from a Subaerial to a Subnival Permafrost Temperature Regime Following Increased Snow Cover (Livingston Island, Maritime Antarctic) |
title_short |
Transition from a Subaerial to a Subnival Permafrost Temperature Regime Following Increased Snow Cover (Livingston Island, Maritime Antarctic) |
title_full |
Transition from a Subaerial to a Subnival Permafrost Temperature Regime Following Increased Snow Cover (Livingston Island, Maritime Antarctic) |
title_fullStr |
Transition from a Subaerial to a Subnival Permafrost Temperature Regime Following Increased Snow Cover (Livingston Island, Maritime Antarctic) |
title_full_unstemmed |
Transition from a Subaerial to a Subnival Permafrost Temperature Regime Following Increased Snow Cover (Livingston Island, Maritime Antarctic) |
title_sort |
transition from a subaerial to a subnival permafrost temperature regime following increased snow cover (livingston island, maritime antarctic) |
publisher |
MDPI AG |
publishDate |
2020 |
url |
https://doi.org/10.3390/atmos11121332 https://doaj.org/article/e809566496cf42c399b67cfa3faea4a1 |
long_lat |
ENVELOPE(-60.500,-60.500,-62.600,-62.600) |
geographic |
Antarctic Antarctic Peninsula Livingston Island The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Livingston Island The Antarctic |
genre |
Active layer thickness Antarc* Antarctic Antarctic Peninsula Livingston Island permafrost |
genre_facet |
Active layer thickness Antarc* Antarctic Antarctic Peninsula Livingston Island permafrost |
op_source |
Atmosphere, Vol 11, Iss 1332, p 1332 (2020) |
op_relation |
https://www.mdpi.com/2073-4433/11/12/1332 https://doaj.org/toc/2073-4433 doi:10.3390/atmos11121332 2073-4433 https://doaj.org/article/e809566496cf42c399b67cfa3faea4a1 |
op_doi |
https://doi.org/10.3390/atmos11121332 |
container_title |
Atmosphere |
container_volume |
11 |
container_issue |
12 |
container_start_page |
1332 |
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1766332654671626240 |