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Thermal monitoring of a Cryosol in a high marine terrace (Half Moon Island, Maritime Antarctica).
Schaefer, Carlos Ernesto G R; Francelino, Márcio R; Pereira, Antonio B; Michel, Roberto F M; Schmitz, Daniela; Sacramento, Iorrana F; Rodrigues, William F; Miranda, Caik O DE.
Afiliação
  • Schaefer CEGR; Federal University of Viçosa, PH Rolfs Avenue, s/n, Department of Soil, Center, 36570-000 Viçosa, MG, Brazil.
  • Francelino MR; Federal University of Viçosa, PH Rolfs Avenue, s/n, Department of Soil, Center, 36570-000 Viçosa, MG, Brazil.
  • Pereira AB; Federal University of Pampa, Antônio Trilha Avenue, 1847, Vila Camita, 97300-162 São Gabriel, RS, Brazil.
  • Michel RFM; Federal University of Santa Cruz, Jorge Amado Road, Km 16, Department of Agrarian and Environmental Sciences, Salobrinho, 45662-900 Ilhéus, BA, Brazil.
  • Schmitz D; Federal University of Viçosa, PH Rolfs Avenue, s/n, Department of Soil, Center, 36570-000 Viçosa, MG, Brazil.
  • Sacramento IF; Federal University of Viçosa, PH Rolfs Avenue, s/n, Department of Soil, Center, 36570-000 Viçosa, MG, Brazil.
  • Rodrigues WF; Federal University of Ouro Preto, Diogo de Vasconcelos Street, 122, Department of Geology, Pilar, 35402-163, Ouro Preto, Minas Gerais, Brazil.
  • Miranda CO; Federal University of Viçosa, PH Rolfs Avenue, s/n, Department of Soil, Center, 36570-000 Viçosa, MG, Brazil.
An Acad Bras Cienc ; 95(suppl 3): e20210692, 2023.
Article em En | MEDLINE | ID: mdl-37585979
Active layer and permafrost are important indicators of climate changes in periglacial areas of Antarctica, and the soil thermal regime of Maritime Antarctica is sensitive to the current warming trend. This research aimed to characterize the active layer thermal regime of a patterned ground located at an upper marine terrace in Half Moon Island, during 2015-2018. Temperature and moisture sensors were installed at different soil depths, combined with air temperature, collecting hourly data. Statistical analysis was applied to describe the soil thermal regime and estimate active layer thickness. The thermal regime of the studied soil was typical of periglacial environment, with high variability in temperature and water content in the summer, resulting in frequent freeze-thaw cycles. We detected dominant freezing conditions, whereas soil temperatures increased, and the period of high soil moisture content lasted longer over the years. Active layer thickness varied between the years, reaching a maximum depth in 2018. Permafrost degradation affects soil drainage and triggers erosion in the upper marine terrace, where permafrost occurrence is unlikely. Longer monitoring periods are necessary for a detailed understanding on how current climatic and geomorphic conditions affect the unstable permafrost of low-lying areas of Antarctica (marine terraces).
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Pergelissolo Idioma: En Revista: An Acad Bras Cienc Ano de publicação: 2023 Tipo de documento: Article País de afiliação: Brasil País de publicação: Brasil
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Pergelissolo Idioma: En Revista: An Acad Bras Cienc Ano de publicação: 2023 Tipo de documento: Article País de afiliação: Brasil País de publicação: Brasil