Application insight
Permafrost temperature monitoring
01 / The annual thermal wave
Follow a year through the ground.
Air and surface temperatures change quickly. Deeper in soil, ice and rock, the annual signal becomes smaller and arrives later. A sensor string records these layers simultaneously, turning a borehole into a continuous temperature profile.
All measuring points are read through one digital 2Wire string, making depth-to-depth comparison straightforward.
Choose closer spacing around the surface and active layer, then wider intervals deeper in the borehole.
Each digital measuring point retains its calibration data, even when the connected logger is exchanged.
02 / Depth profile
Surface extremes fade with depth.
The published profiles illustrate why a single surface sensor cannot describe a permafrost system: near-surface temperatures span a broad range, while deeper profiles converge toward a much narrower thermal regime.
Repeated measurements at fixed depths reveal active-layer behaviour, freeze–thaw timing and long-term changes below the zone of strong annual variation.
Research example: Rasmussen et al., “Modelling present and future permafrost thermal regimes in Northeast Greenland”, Cold Regions Science and Technology 146 (2018), 199–213.
03 / Field interpretation
Temperature links seasons to ground movement.
At a permafrost-affected rockslide in northern Norway, multi-depth temperature records helped researchers interpret seasonal processes in fractures and develop a field-based deformation model.
Research examples: Blikra & Christiansen, “A field-based model of permafrost-controlled rockslide deformation in northern Norway”, Geomorphology 208 (2014), 34–49. These published figures illustrate the application; they are not presented as GEOprecision measurement results.
04 / Configure the profile
Put precision at the depths that matter.
Sensor positions, node type, cable length, mechanical construction and readout are selected for the borehole and research question—not imposed by a fixed catalogue layout.
Standard sensor spacing starts at 15 cm; 10 cm is possible at the first interval.
Choose TNode, TNode EX or TNode HD, with resolution down to 0.0001 °C.
Strings are available up to 100 m as standard and 250 m or more on request.