| Title | Time-lapse electrical resistivity surveys and unfrozen water content in cold continuous permafrost |
| |
| Author | Oldenborger, G A ;
LeBlanc, A M |
| Source | 23rd European Meeting of Environmental and Engineering Geophysics, abstract volume; 2017. |
| Links | Online - En ligne
|
| Image |  |
| Year | 2017 |
| Alt Series | Natural Resources Canada, Contribution Series 20170022 |
| Publisher | European association of Geoscientists and Engineers |
| Meeting | 23rd European Meeting of Environmental and Engineering Geophysics; Malmo; SE; September 3-7, 2017 |
| Document | book |
| Lang. | English |
| Media | paper |
| File format | pdf |
| Province | Nunavut |
| NTS | 25N/10 |
| Area | Iqaluit |
| Lat/Long WENS | -69.0000 -68.0000 63.9167 63.0000 |
| Subjects | Nature and Environment; permafrost; modelling; thermal regimes |
| Illustrations | graphs; plots; location maps |
| Program | Climate Change Geoscience Land-based Infrastructure |
| Released | 2017 01 01 |
| Abstract | Estimates of material properties such as ice content or unfrozen water content are critical for thermal modelling of the response of permafrost to climate forcing, understanding contaminant flow and
transport, or for predicting the behaviour of permafrost as an engineering substrate. We utilize time-lapse electrical resistivity surveys to examine the potential for imaging relative changes in unfrozen water content for cold continuous permafrost
in the Canadian Arctic. Electrical resistivity data were collected from 2012/08 to 2015/06 at semi-regular time intervals using a permanent electrode installation at Iqaluit International Airport in Nunavut, Canada. Using post-inversion model
differencing, we observe significant changes in electrical resistivity and we infer changes in unfrozen moisture content that appear consistent with temperature records. The most prevalent changes occur below the active layer in the zone of
significant temperature fluctuation. |
| Summary | (Plain Language Summary, not published)
Estimates of material properties such as ice content or unfrozen water content are critical for thermal modelling of the response of permafrost to
climate forcing, understanding contaminant flow and transport, or for predicting the behaviour of permafrost as an engineering substrate. We utilize time-lapse electrical resistivity surveys to examine the potential for imaging relative changes in
unfrozen water content for cold continuous permafrost in the Canadian Arctic. Electrical resistivity data were collected from 2012/08 to 2015/06 at semi-regular time intervals using a permanent electrode installation at Iqaluit International Airport
in Nunavut, Canada. Using post-inversion model differencing, we observe significant changes in electrical resistivity and we infer changes in unfrozen moisture content that appear consistent with temperature records. The most prevalent changes occur
below the active layer in the zone of significant temperature fluctuation. |
| GEOSCAN ID | 300543 |
|
|