Active layer thermal regime in two climatically contrasted sites of the Antarctic Peninsula region
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10451/28154 |
Resumo: | Permafrost controls geomorphic processes in ice-free areas of the Antarctic Peninsula (AP) region. Future climate trends will promote significant changes of the active layer regime and permafrost distribution, and therefore a better characterization of present-day state is needed. With this purpose, this research focuses on Ulu Peninsula (James Ross Island) and Byers Peninsula (Livingston Island), located in the area of continuous and discontinuous permafrost in the eastern and western sides of the AP, respectively. Air and ground temperatures in as low as 80 cm below surface of the ground were monitored between January and December 2014. There is a high correlation between air temperatures on both sites (r=0.74). The mean annual temperature in Ulu Peninsula was -7.9 ºC, while in Byers Peninsula was -2.6 ºC. The lower air temperatures in Ulu Peninsula are also reflected in ground temperatures, which were between 4.9 (5 cm) and 5.9 ºC (75/80 cm) lower. The maximum active layer thickness observed during the study period was 52 cm in Ulu Peninsula and 85 cm in Byers Peninsula. Besides climate, soil characteristics, topography and snow cover are the main factors controlling the ground thermal regime in both areas. |
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Active layer thermal regime in two climatically contrasted sites of the Antarctic Peninsula regionAntarctic PeninsulaJames Ross IslandLivingston Islandactive layerair and ground temperaturesPermafrost controls geomorphic processes in ice-free areas of the Antarctic Peninsula (AP) region. Future climate trends will promote significant changes of the active layer regime and permafrost distribution, and therefore a better characterization of present-day state is needed. With this purpose, this research focuses on Ulu Peninsula (James Ross Island) and Byers Peninsula (Livingston Island), located in the area of continuous and discontinuous permafrost in the eastern and western sides of the AP, respectively. Air and ground temperatures in as low as 80 cm below surface of the ground were monitored between January and December 2014. There is a high correlation between air temperatures on both sites (r=0.74). The mean annual temperature in Ulu Peninsula was -7.9 ºC, while in Byers Peninsula was -2.6 ºC. The lower air temperatures in Ulu Peninsula are also reflected in ground temperatures, which were between 4.9 (5 cm) and 5.9 ºC (75/80 cm) lower. The maximum active layer thickness observed during the study period was 52 cm in Ulu Peninsula and 85 cm in Byers Peninsula. Besides climate, soil characteristics, topography and snow cover are the main factors controlling the ground thermal regime in both areas.Universidad de La RiojaRepositório da Universidade de LisboaHrbáček, F.Oliva, M.Laska, K.Ruiz-Fernández, J.De Pablo, M. A.Vieira, GoncaloRamos, M.Nývlt, D.2017-06-23T11:06:58Z20162016-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10451/28154engHrbáček, F., Oliva, M., Laska, K., Ruiz-Fernández, J., de Pablo, M., Vieira, G., Ramos, M., & Nývlt, D. (2016). Active layer thermal regime in two climatically contrasted sites of the Antarctic Peninsula region. Cuadernos de Investigación Geográfica, 42(2), 457-474. doi:http://dx.doi.org/10.18172/cig.29150211-682010.18172/cig.2915info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-11-08T16:19:30Zoai:repositorio.ul.pt:10451/28154Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T21:44:23.206807Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Active layer thermal regime in two climatically contrasted sites of the Antarctic Peninsula region |
title |
Active layer thermal regime in two climatically contrasted sites of the Antarctic Peninsula region |
spellingShingle |
Active layer thermal regime in two climatically contrasted sites of the Antarctic Peninsula region Hrbáček, F. Antarctic Peninsula James Ross Island Livingston Island active layer air and ground temperatures |
title_short |
Active layer thermal regime in two climatically contrasted sites of the Antarctic Peninsula region |
title_full |
Active layer thermal regime in two climatically contrasted sites of the Antarctic Peninsula region |
title_fullStr |
Active layer thermal regime in two climatically contrasted sites of the Antarctic Peninsula region |
title_full_unstemmed |
Active layer thermal regime in two climatically contrasted sites of the Antarctic Peninsula region |
title_sort |
Active layer thermal regime in two climatically contrasted sites of the Antarctic Peninsula region |
author |
Hrbáček, F. |
author_facet |
Hrbáček, F. Oliva, M. Laska, K. Ruiz-Fernández, J. De Pablo, M. A. Vieira, Goncalo Ramos, M. Nývlt, D. |
author_role |
author |
author2 |
Oliva, M. Laska, K. Ruiz-Fernández, J. De Pablo, M. A. Vieira, Goncalo Ramos, M. Nývlt, D. |
author2_role |
author author author author author author author |
dc.contributor.none.fl_str_mv |
Repositório da Universidade de Lisboa |
dc.contributor.author.fl_str_mv |
Hrbáček, F. Oliva, M. Laska, K. Ruiz-Fernández, J. De Pablo, M. A. Vieira, Goncalo Ramos, M. Nývlt, D. |
dc.subject.por.fl_str_mv |
Antarctic Peninsula James Ross Island Livingston Island active layer air and ground temperatures |
topic |
Antarctic Peninsula James Ross Island Livingston Island active layer air and ground temperatures |
description |
Permafrost controls geomorphic processes in ice-free areas of the Antarctic Peninsula (AP) region. Future climate trends will promote significant changes of the active layer regime and permafrost distribution, and therefore a better characterization of present-day state is needed. With this purpose, this research focuses on Ulu Peninsula (James Ross Island) and Byers Peninsula (Livingston Island), located in the area of continuous and discontinuous permafrost in the eastern and western sides of the AP, respectively. Air and ground temperatures in as low as 80 cm below surface of the ground were monitored between January and December 2014. There is a high correlation between air temperatures on both sites (r=0.74). The mean annual temperature in Ulu Peninsula was -7.9 ºC, while in Byers Peninsula was -2.6 ºC. The lower air temperatures in Ulu Peninsula are also reflected in ground temperatures, which were between 4.9 (5 cm) and 5.9 ºC (75/80 cm) lower. The maximum active layer thickness observed during the study period was 52 cm in Ulu Peninsula and 85 cm in Byers Peninsula. Besides climate, soil characteristics, topography and snow cover are the main factors controlling the ground thermal regime in both areas. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016 2016-01-01T00:00:00Z 2017-06-23T11:06:58Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10451/28154 |
url |
http://hdl.handle.net/10451/28154 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Hrbáček, F., Oliva, M., Laska, K., Ruiz-Fernández, J., de Pablo, M., Vieira, G., Ramos, M., & Nývlt, D. (2016). Active layer thermal regime in two climatically contrasted sites of the Antarctic Peninsula region. Cuadernos de Investigación Geográfica, 42(2), 457-474. doi:http://dx.doi.org/10.18172/cig.2915 0211-6820 10.18172/cig.2915 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidad de La Rioja |
publisher.none.fl_str_mv |
Universidad de La Rioja |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799134364884271104 |