Lacustrine and amphibian ERT surveys acquired in the region of Inuvik, Northwest Territories, Canada

• Main Authors: Overduin, Pier Paul, Ryberg, Trond, Haberland, Christian, Erkens, Ephraim
• Format: Dataset
• Language: English
• Published: PANGAEA 2022
• Subjects: AWI_PerDyn; AWI_Perma; AWI Arctic Land Expedition; CA-Land_2021_NWCanada; CA-Land_2021_NWCanada_ERT-L3; DATE/TIME; DEPTH; water; Distance; relative; Electrical resistivity tomography; ERT; Lake 3; LATITUDE; LONGITUDE; Mackenzie Delta; Modular Observation Solutions for Earth Systems; MOSES; MOSES 2021; mCan2021; ORDINAL NUMBER; Permafrost; Permafrost Research; Permafrost Research (Periglacial Dynamics) @ AWI; Position; Profile ID; Quality flag; Resistivity; apparent; talik; thermokarst lake; Inuvik; Northwest Territories; permafrost; Thermokarst; Tuktoyaktuk
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.949512; https://doi.org/10.1594/PANGAEA.949512

This dataset contains seven Electrical Resistivity Tomography (ERT) profiles taken in September 2021 at “Lake 3”, a thermokarst lake near the Inuvik-Tuktoyaktuk-Highway (ITH), about 50 km north of Inuvik (NWT, Canada). The measurements were part of the “Mackenzie Delta Permafrost Field Campaign” (mCan2021) within the “Modular Observation solutions for Earth Systems” (MOSES) program. The collected profiles consist of numerous adjacent vertical soundings in a (quasi-symmetric) reciprocal Wenner-Schlumberger array. In addition to surveys on the lake, using a floating cable towed behind a boat, two “amphibian” profiles were taken. Starting as purely terrestrial surveys using metal spike electrodes, the cable was then moved towards the lake with some of the electrodes floating on the water surface, and some still on land. The aim of the study was to determine permafrost properties on the land, to detect a possible talik beneath the lake and to especially be able to infer the transition between the two below the shoreline.