Active layer thermal regime in two climatically contrasted sites of the Antarctic Peninsula region
- F. Hrbáček 1
- M. Oliva 2
- K. Laska 2
- J. Ruiz Fernández 3
- M. A. de Pablo 4
- G. Vieira 2
- M. Ramos 4
- D. Nývlt 1
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1
Masaryk University
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2
Universidade de Lisboa
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3
Universidad de Oviedo
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4
Universidad de Alcalá
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ISSN: 0211-6820, 1697-9540
Year of publication: 2016
Volume: 42
Issue: 2
Pages: 457-474
Type: Article
More publications in: Cuadernos de investigación geográfica: Geographical Research Letters
Abstract
El permafrost controla los procesos geomorfológicos en las regiones libres de hielo de la Península Antártica (AP). Las tendencias climáticas futuras conllevarán cambios significativos en el régimen térmico de la capa activa y en la distribución del permafrost, y por ello, se necesita una mejor caracterización de su estado actual. Con este objetivo, esta investigación se centra en la Península Ulu (isla James Ross) y la Península Byers (isla Livingston), áreas emplazadas en zonas de permafrost continuo y discontinuo del este y oeste de la AP, respectivamente. Las temperaturas del aire y de suelo hasta 80 cm fueron monitorizadas entre enero y diciembre de 2014. Existe una alta correlación entre la temperatura del aire en ambos sitios (r = 0,74). La temperatura media anual en la Península Ulu fue de -7,9 ºC, mientras que en la Península Byers fue -2,6 ºC. Las temperaturas del aire más frías registradas en la Península Ulu también se detectaron en las temperaturas del suelo, que fueron entre 4,9 (5 cm) y 5,9 ºC (75/80 cm) más frías. El espesor máximo de la capa activa durante el período de estudio fue de 52 cm de la Península Ulu y 85 cm en la Península Byers. Además del clima, las características del suelo, la topografía y la cubierta de nieve, son los principales factores que controlan el régimen térmico del suelo en ambas regiones.
Funding information
The work was supported by the Masaryk University project MUNI/A/561 1370/2014: Global environmental changes in time and space; research project HOLOANTAR (Holocene environmental change in the Maritime Antarctic. Interactions Between permafrost and the lacustrine environment) and the Portuguese Polar Program (PROPOLAR), both funded by the Portuguese Science Foundation.Funders
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Masaryk University
Czechia
- MUNI/A/561 1370/2014
- Science Foundation Portugal
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