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| Titel |
Thermal characterization of the active layer at the Limnopolar Lake CALM-S site on Byers Peninsula (Livingston Island), Antarctica |
| VerfasserIn |
M. A. De Pablo, M. Ramos, A. Molina |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1869-9510
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| Digitales Dokument |
URL |
| Erschienen |
In: Solid Earth ; 5, no. 2 ; Nr. 5, no. 2 (2014-07-30), S.721-739 |
| Datensatznummer |
250115322
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| Publikation (Nr.) |
 copernicus.org/se-5-721-2014.pdf |
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| Zusammenfassung |
| The Limnopolar Lake site (A25), of the Circumpolar Active Layer Monitoring-South network (CALM-S), is located on Byers Peninsula, where the active
layer thickness is monitored systematically (by mechanical probing during the
thawing season and by temperature devices continuously since 2009). Air,
surface, snow and ground temperature devices have been installed to monitor
ground thermal behavior, which is presented and characterized here. We use
the air and ground mean daily temperature values to define the following
parameters: maximum, minimum and mean temperatures, the zero annual thermal
amplitude, and the depth and position of the top of the permafrost table. The
freezing and thawing seasons (defining their starting dates as well as their
length) and the existence of zero curtain periods have also been established.
We also derive apparent thermal diffusivity and plot thermograms to study the
thermal behavior of the ground at different depths and seasons. After this
complete thermal characterization of the active layer, we propose the
potential existence of a permafrost table at approximately 130 cm in depth
as well as a former transitional layer above it, and discuss the role of
water in connection with the thermal behavior of the ground during the study
period. |
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