Thermal monitoring of a Cryosol in a high marine terrace (Half Moon Island, Maritime Antarctica)
Abstract 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...
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Academia Brasileira de Ciências
2023-08-01
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| Series: | Anais da Academia Brasileira de Ciências |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652023000601501&lng=en&tlng=en |
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| author | CARLOS ERNESTO G.R. SCHAEFER MÁRCIO R. FRANCELINO ANTONIO B. PEREIRA ROBERTO F.M. MICHEL DANIELA SCHMITZ IORRANA F. SACRAMENTO WILLIAM F. RODRIGUES CAIK O. DE MIRANDA |
| author_facet | CARLOS ERNESTO G.R. SCHAEFER MÁRCIO R. FRANCELINO ANTONIO B. PEREIRA ROBERTO F.M. MICHEL DANIELA SCHMITZ IORRANA F. SACRAMENTO WILLIAM F. RODRIGUES CAIK O. DE MIRANDA |
| author_sort | CARLOS ERNESTO G.R. SCHAEFER |
| collection | DOAJ |
| description | Abstract 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). |
| first_indexed | 2024-03-12T14:52:29Z |
| format | Article |
| id | doaj.art-27fdc09a66ae44e79dece199b8d0aab2 |
| institution | Directory Open Access Journal |
| issn | 1678-2690 |
| language | English |
| last_indexed | 2024-03-12T14:52:29Z |
| publishDate | 2023-08-01 |
| publisher | Academia Brasileira de Ciências |
| record_format | Article |
| series | Anais da Academia Brasileira de Ciências |
| spelling | doaj.art-27fdc09a66ae44e79dece199b8d0aab22023-08-15T07:49:18ZengAcademia Brasileira de CiênciasAnais da Academia Brasileira de Ciências1678-26902023-08-0195suppl 310.1590/0001-3765202320210692Thermal monitoring of a Cryosol in a high marine terrace (Half Moon Island, Maritime Antarctica)CARLOS ERNESTO G.R. SCHAEFERhttps://orcid.org/0000-0001-7060-1598MÁRCIO R. FRANCELINOhttps://orcid.org/0000-0001-8837-1372ANTONIO B. PEREIRAhttps://orcid.org/0000-0003-0368-4594ROBERTO F.M. MICHELhttps://orcid.org/0000-0001-5951-4610DANIELA SCHMITZhttps://orcid.org/0000-0002-3162-2430IORRANA F. SACRAMENTOhttps://orcid.org/0000-0002-9440-0034WILLIAM F. RODRIGUEShttps://orcid.org/0000-0003-0980-282XCAIK O. DE MIRANDAhttps://orcid.org/0000-0002-3510-2678Abstract 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).http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652023000601501&lng=en&tlng=enclimate changeholocene terracessoil moisturesoil thermal regimepermafrost |
| spellingShingle | CARLOS ERNESTO G.R. SCHAEFER MÁRCIO R. FRANCELINO ANTONIO B. PEREIRA ROBERTO F.M. MICHEL DANIELA SCHMITZ IORRANA F. SACRAMENTO WILLIAM F. RODRIGUES CAIK O. DE MIRANDA Thermal monitoring of a Cryosol in a high marine terrace (Half Moon Island, Maritime Antarctica) Anais da Academia Brasileira de Ciências climate change holocene terraces soil moisture soil thermal regime permafrost |
| title | Thermal monitoring of a Cryosol in a high marine terrace (Half Moon Island, Maritime Antarctica) |
| title_full | Thermal monitoring of a Cryosol in a high marine terrace (Half Moon Island, Maritime Antarctica) |
| title_fullStr | Thermal monitoring of a Cryosol in a high marine terrace (Half Moon Island, Maritime Antarctica) |
| title_full_unstemmed | Thermal monitoring of a Cryosol in a high marine terrace (Half Moon Island, Maritime Antarctica) |
| title_short | Thermal monitoring of a Cryosol in a high marine terrace (Half Moon Island, Maritime Antarctica) |
| title_sort | thermal monitoring of a cryosol in a high marine terrace half moon island maritime antarctica |
| topic | climate change holocene terraces soil moisture soil thermal regime permafrost |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652023000601501&lng=en&tlng=en |
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