GPR profiles and ground ice contents of permafrost cores in Cape Bounty, Melville Island, 2015 ...
Investigations into the susceptibility of permafrost landscapes to thermokarst can be performed using various approaches, depending on the scale of investigation. In many cases, point-based field measurements are extrapolated to larger scales and vice versa. The integration of scales often requires...
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| Format: | Dataset |
| Language: | unknown |
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Canadian Cryospheric Information Network
2020
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| Online Access: | https://dx.doi.org/10.5884/13129 https://www.polardata.ca/pdcsearch/?doi_id=13129 |
| Summary: | Investigations into the susceptibility of permafrost landscapes to thermokarst can be performed using various approaches, depending on the scale of investigation. In many cases, point-based field measurements are extrapolated to larger scales and vice versa. The integration of scales often requires some form of ground control in addition to remote sensing surveys, which are often exclusively conducted. As upscaling from discrete field measurements can provide spatial coverage and landscape-scale significance, downscaling from remote sensing can offer insight into processes and serve as calibration. Here we present a multiple-scale evaluation of a High Arctic field site, where differential interferometric synthetic aperture radar (DInSAR) showed subsidence between 2013 and 2015. Ground-based, cryostratigraphy measurements were combined with ground-penetrating radar (GPR) to investigate permafrost ice-content. The results indicate a connection between subsidence, as detected by DInSAR, and the locations where ... : The data was collected in order to link subsidence measurements from differential interferometric synthetic aperture radar (DinSAR) data to local ground ice characteristics, in a multi-scale approach. Boreholes were used as point measurements of permafrost ice content and cryostratigraphy, and GPR profiles were used to link the boreholes together and to extrapolate the measurements to a wider area. Subsidence could therefore be linked to ground ice content and to local permafrost history and evolution, providing insight into local conditions and landscape variability effects on thermokarst evolution. ... |
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