James Ross Island
James Ross Island contains the largest ice-free area in the whole Antarctic Peninsula region and provides a unique place to study active layer dynamics.
CALM-S JGM is located near to Czech research station Johann Gregor Mendel on James Ross Island. The active layer has been measured in an area of 80x70 m since 2014 at this CALM-S site. The long-term variability of active layer thickness is between 55 and 130 cm, which is due to heterogeneous lithology between the north part (marine terrace sediments with sandy soils) and the southern part (Whisky Bay formation; cretaceous sediments with loamy soil). Currently, the site is equipped with 2 profiles for ground temperature monitoring up to a depth of 2 m; 4 shallower profiles (75 to 100 cm), and 2 systems for soil moisture monitoring using TDR probes.
We installed an automatic ERT (A-ERT) setup with 48 electrodes in this site for detailed detection of active layer freeze–thaw dynamics. The A-ERT profile crosses two different lithologies of marine terrace sediment in the north and Whisky Bay formation in the south. Due to a slight topography along the profile, the northern part of the profile with marine terrace sediment is more prone to snow accumulation. Data from time-lapse ERT could be used to investigate how different snow cover accumulations and lithologies affect permafrost dynamics. The Lippmann resistivity meter was programmed in combination with multi-electrodes for ERT surveys and measurements were performed using the Wenner electrode configuration. we used 48 stainless plates for better ground contact, with an electrode spacing of 0.5 m. A robust, water-proof box was used and buried, casing the 4POINTLIGHT_10W instrument, solar panel-driven battery, and multi-electrodes connectors during data acquisition. This setup yields 360 individual data points for each monitoring data set. Satellite communication for remote data transfer and system control was tested in this setup for the first time.
James Ross Island contains the largest ice-free area in the whole Antarctic Peninsula region and provides a unique place to study active layer dynamics.
CALM-S JGM is located near to Czech research station Johann Gregor Mendel on James Ross Island. The active layer has been measured in an area of 80x70 m since 2014 at this CALM-S site. The long-term variability of active layer thickness is between 55 and 130 cm, which is due to heterogeneous lithology between the north part (marine terrace sediments with sandy soils) and the southern part (Whisky Bay formation; cretaceous sediments with loamy soil). Currently, the site is equipped with 2 profiles for ground temperature monitoring up to a depth of 2 m; 4 shallower profiles (75 to 100 cm), and 2 systems for soil moisture monitoring using TDR probes.
We installed an automatic ERT (A-ERT) setup with 48 electrodes in this site for detailed detection of active layer freeze–thaw dynamics. The A-ERT profile crosses two different lithologies of marine terrace sediment in the north and Whisky Bay formation in the south. Due to a slight topography along the profile, the northern part of the profile with marine terrace sediment is more prone to snow accumulation. Data from time-lapse ERT could be used to investigate how different snow cover accumulations and lithologies affect permafrost dynamics. The Lippmann resistivity meter was programmed in combination with multi-electrodes for ERT surveys and measurements were performed using the Wenner electrode configuration. we used 48 stainless plates for better ground contact, with an electrode spacing of 0.5 m. A robust, water-proof box was used and buried, casing the 4POINTLIGHT_10W instrument, solar panel-driven battery, and multi-electrodes connectors during data acquisition. This setup yields 360 individual data points for each monitoring data set. Satellite communication for remote data transfer and system control was tested in this setup for the first time.