Use of GPS interferometric reflectometry and temperature to estimate freezing-season ground uplift under snow accumulation over a permafrost area ...
<!--!introduction!--> Permafrost ground surface undergoes seasonal subsidence and uplift during freeze-thaw cycles of the active layer on top of permafrost. GPS interferometric reflectometry (GPS-IR), a technique that uses the signal-to-noise ratio (SNR) to infer the ground surface properties,...
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| Format: | Conference Object |
| Language: | unknown |
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GFZ German Research Centre for Geosciences
2023
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| Online Access: | https://dx.doi.org/10.57757/iugg23-2781 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5019103 |
| Summary: | <!--!introduction!--> Permafrost ground surface undergoes seasonal subsidence and uplift during freeze-thaw cycles of the active layer on top of permafrost. GPS interferometric reflectometry (GPS-IR), a technique that uses the signal-to-noise ratio (SNR) to infer the ground surface properties, has been applied to retrieve frozen ground movements in the thaw and freezing seasons. Over permafrost areas, the complete ground freezing process is rarely observed by GPS-IR due to the normal autumn snow accumulation on the ground. In this study, we combine GPS-IR measurements and temperature records to predict the freezing-season ground uplift under snow cover. First, we apply GPS-IR to the SNR data collected by GPS site SG27, located in Utqiaġvik Alaska, to retrieve daily elevation changes of the ground surface from 2018 to 2019. Second, the timings of snow accumulation and disappearance are estimated by GPS-IR measurements, and the onset of freezing and thaw seasons are determined with the thermal indices ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ... |
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