Permafrost station at Sommeiller Pass (NW Italy): from the monitoring to reference site and methods
The Sommeiller Pass permafrost monitoring station, at about 3000 m of altitude, is the key site of the regional network installed in 2009 during the European Project PermaNET in the Piedmont Alps (NW Italy). The station consists of 3 vertical boreholes 5, 10 and 100 m deep with different characteris...
Main Authors: | , , , , , |
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Other Authors: | , , , , , , |
Format: | Conference Object |
Language: | English |
Published: |
Laboratoire EDYTEM
2019
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Subjects: | |
Online Access: | http://hdl.handle.net/11696/71570 https://hal.archives-ouvertes.fr/hal-01816115v2/document |
Summary: | The Sommeiller Pass permafrost monitoring station, at about 3000 m of altitude, is the key site of the regional network installed in 2009 during the European Project PermaNET in the Piedmont Alps (NW Italy). The station consists of 3 vertical boreholes 5, 10 and 100 m deep with different characteristics, equipped with thermometric chains for a total of 34 Pt100 sensors. Due to infiltration and freezing of water inside the instrumentation and boreholes, the station became operational in 2011 after recovering. The collected data shows a constant active layer 8-9 m of thickness, while the permafrost temperature curves show a degradation of the base at approximately 65 m of depth since 2014. In order to verify this variation (about 0.4 °C), considering the station history, a sensor calibration was carried out in laboratory and on site aimed to understand the reliability of the measurements in progress. |
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