Thermal variations of the active layer in Fildes Peninsula, King George Island, Maritime Antarctica
Abstract This work aimed to characterize the variation in the thermal regime of the active layer in a permafrost area on Fildes Peninsula, Antarctica, and relate this variability with meteorological data between 2014 and 2016. The monitoring site was installed to continuously monitor the temperature...
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ftdoajarticles:oai:doaj.org/article:aa726cc95ed94fb4800916267d173471 2024-01-21T09:58:30+01:00 Thermal variations of the active layer in Fildes Peninsula, King George Island, Maritime Antarctica ANDRÉ M. DE ANDRADE ROBERTO F.M. MICHEL ULISSES FRANZ BREMER ELIAS DE LIMA NETO GONÇALO BRITO T.G. VIEIRA CARLOS ERNESTO G.R. SCHAEFER JEFFERSON C. SIMÕES 2023-12-01T00:00:00Z https://doi.org/10.1590/0001-3765202320230181 https://doaj.org/article/aa726cc95ed94fb4800916267d173471 EN eng Academia Brasileira de Ciências http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652023000601116&lng=en&tlng=en http://www.scielo.br/pdf/aabc/v95s3/0001-3765-aabc-95-s3-e20230181.pdf https://doaj.org/toc/1678-2690 1678-2690 doi:10.1590/0001-3765202320230181 https://doaj.org/article/aa726cc95ed94fb4800916267d173471 Anais da Academia Brasileira de Ciências, Vol 95, Iss suppl 3 (2023) active layer maritime Antarctic Permafrost monitoring Science Q article 2023 ftdoajarticles https://doi.org/10.1590/0001-3765202320230181 2023-12-24T01:45:06Z Abstract This work aimed to characterize the variation in the thermal regime of the active layer in a permafrost area on Fildes Peninsula, Antarctica, and relate this variability with meteorological data between 2014 and 2016. The monitoring site was installed to continuously monitor the temperature and moisture of the active layer, radiation flow on the surface, and air temperature. We used data collected to generate the indexes freezing degree-days, thawing degree-days, frost number, n-factor, apparent thermal diffusivity, and active layer thickness. The temperature of the active layer is not homogeneous, varying with depth and position in the transect, with the greatest variations in soil with better drainage and lower moisture content. Among the evaluated factors, air and soil surface temperature are the ones that most influence the thermal gradient of the active layer. We identified that near the surface there is a greater influence of albedo and cloudiness and at -35 cm depth there is a greater influence of net radiation and soil moisture. The average depth of the active layer in 2014 was -44.3 cm and in 2015 -47.7 cm and the frost number index indicates that there was a predominance of continuous permafrost in the transect during the monitoring. Article in Journal/Newspaper Active layer thickness Antarc* Antarctic Antarctica King George Island permafrost Directory of Open Access Journals: DOAJ Articles Antarctic Fildes ENVELOPE(-58.817,-58.817,-62.217,-62.217) Fildes peninsula ENVELOPE(-58.948,-58.948,-62.182,-62.182) King George Island Anais da Academia Brasileira de Ciências 95 suppl 3 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
active layer maritime Antarctic Permafrost monitoring Science Q |
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active layer maritime Antarctic Permafrost monitoring Science Q ANDRÉ M. DE ANDRADE ROBERTO F.M. MICHEL ULISSES FRANZ BREMER ELIAS DE LIMA NETO GONÇALO BRITO T.G. VIEIRA CARLOS ERNESTO G.R. SCHAEFER JEFFERSON C. SIMÕES Thermal variations of the active layer in Fildes Peninsula, King George Island, Maritime Antarctica |
topic_facet |
active layer maritime Antarctic Permafrost monitoring Science Q |
description |
Abstract This work aimed to characterize the variation in the thermal regime of the active layer in a permafrost area on Fildes Peninsula, Antarctica, and relate this variability with meteorological data between 2014 and 2016. The monitoring site was installed to continuously monitor the temperature and moisture of the active layer, radiation flow on the surface, and air temperature. We used data collected to generate the indexes freezing degree-days, thawing degree-days, frost number, n-factor, apparent thermal diffusivity, and active layer thickness. The temperature of the active layer is not homogeneous, varying with depth and position in the transect, with the greatest variations in soil with better drainage and lower moisture content. Among the evaluated factors, air and soil surface temperature are the ones that most influence the thermal gradient of the active layer. We identified that near the surface there is a greater influence of albedo and cloudiness and at -35 cm depth there is a greater influence of net radiation and soil moisture. The average depth of the active layer in 2014 was -44.3 cm and in 2015 -47.7 cm and the frost number index indicates that there was a predominance of continuous permafrost in the transect during the monitoring. |
format |
Article in Journal/Newspaper |
author |
ANDRÉ M. DE ANDRADE ROBERTO F.M. MICHEL ULISSES FRANZ BREMER ELIAS DE LIMA NETO GONÇALO BRITO T.G. VIEIRA CARLOS ERNESTO G.R. SCHAEFER JEFFERSON C. SIMÕES |
author_facet |
ANDRÉ M. DE ANDRADE ROBERTO F.M. MICHEL ULISSES FRANZ BREMER ELIAS DE LIMA NETO GONÇALO BRITO T.G. VIEIRA CARLOS ERNESTO G.R. SCHAEFER JEFFERSON C. SIMÕES |
author_sort |
ANDRÉ M. DE ANDRADE |
title |
Thermal variations of the active layer in Fildes Peninsula, King George Island, Maritime Antarctica |
title_short |
Thermal variations of the active layer in Fildes Peninsula, King George Island, Maritime Antarctica |
title_full |
Thermal variations of the active layer in Fildes Peninsula, King George Island, Maritime Antarctica |
title_fullStr |
Thermal variations of the active layer in Fildes Peninsula, King George Island, Maritime Antarctica |
title_full_unstemmed |
Thermal variations of the active layer in Fildes Peninsula, King George Island, Maritime Antarctica |
title_sort |
thermal variations of the active layer in fildes peninsula, king george island, maritime antarctica |
publisher |
Academia Brasileira de Ciências |
publishDate |
2023 |
url |
https://doi.org/10.1590/0001-3765202320230181 https://doaj.org/article/aa726cc95ed94fb4800916267d173471 |
long_lat |
ENVELOPE(-58.817,-58.817,-62.217,-62.217) ENVELOPE(-58.948,-58.948,-62.182,-62.182) |
geographic |
Antarctic Fildes Fildes peninsula King George Island |
geographic_facet |
Antarctic Fildes Fildes peninsula King George Island |
genre |
Active layer thickness Antarc* Antarctic Antarctica King George Island permafrost |
genre_facet |
Active layer thickness Antarc* Antarctic Antarctica King George Island permafrost |
op_source |
Anais da Academia Brasileira de Ciências, Vol 95, Iss suppl 3 (2023) |
op_relation |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652023000601116&lng=en&tlng=en http://www.scielo.br/pdf/aabc/v95s3/0001-3765-aabc-95-s3-e20230181.pdf https://doaj.org/toc/1678-2690 1678-2690 doi:10.1590/0001-3765202320230181 https://doaj.org/article/aa726cc95ed94fb4800916267d173471 |
op_doi |
https://doi.org/10.1590/0001-3765202320230181 |
container_title |
Anais da Academia Brasileira de Ciências |
container_volume |
95 |
container_issue |
suppl 3 |
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1788694327826841600 |