Multisensor ground-based measurements of the permafrost thaw subsidence in the Trail Valley Creek, NWT, Canada, 2015-2016

• Main Authors: Anders, Katharina, Antonova, Sofia, Beck, Inga, Boike, Julia, Höfle, Bernhard, Langer, Moritz, Marsh, Philip, Marx, Sabrina
• Format: Dataset
• Language: English
• Published: PANGAEA 2018
• Subjects: AWI Arctic Land Expedition; CA-Land_2016_TrailValleyCreek; File content; File format; File name; File size; MULT; Multiple investigations; Northwest Territories; Canada; PermaSAR; PermaSAR: Development of a Method to Detect Subsidence by Means of D-InSAR in Permafrost Regions; Trail_Valley_Creek_2016-1; Uniform resource locator/link to file; Arctic; Valley Creek; Trail Valley Creek; permafrost; Tundra
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.888566; https://doi.org/10.1594/PANGAEA.888566

The datasets were acquired at the Arctic tundra site of Trail Valley Creek (TVC), Northwest Territories, Canada, which is underlain by continuous permafrost. With the objective to quantify thaw/freeze dynamics of the ground over time, the two study sites (about 50x50 m each) were repeatedly captured in June 2015, August 2015, and August 2016 by terrestrial laser scanning (TLS) and by Real-Time Kinematic (RTK) Global Navigation Satellite System (GNSS) measurements. Additionally, 24 fiberglass poles were anchored deep in the permafrost and, therefore, assumed to be motionless. With these poles, surface displacement was estimated by measuring repeatedly the distance between ground surface and the top of the poles in June 2015, August 2015, July 2016, August 2016 and June 2017. Furthermore, thaw depths were measured around each fiberglass pole. Additionally, one-time GNSS measurements of the ground surface elevation were acquired at a number of points outside of the two study sites.