P E R M O S S i t e s
The montoring network PERMOS operates two types of sites: temperature sites, where thermal conditions of the subsurface are monitored, and kinematics sites, where permafrost creep is observed.
(I) Temperature Sites
- Subsurface temperatures are recorded in boreholes. The network currently contains 14 borehole sites with one or more boreholes and with depths ranging from 15 to 100 m. Temperatures are recorded by thermistor chains that are installed in the borehole.
- Ground surface temperatures are measured in the area of the drill sites at locations with typical topographic setting and surface cover type (i.e, scree, coarse blocks, and bedrock).
- Geolelectric measurements are currently performed at five of the borehole sites. The fixed installed arrays for electrical resistivity tomography (ERT) provide information on ice and unfrozen water content in the subsurface.
(II) Kinematics Sites
One or more of 10 sites are annually photographed from the air in black&white and infrared. This maintains an important data base for photogrammetrical analyses of rockglacier kinematics as well for the documentation of geomorphological, hydrological, and biological changes in periglacial areas. Terrestrial surveys are undertaken at 13 rock glaciers in order to measure surface displacement.