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Soil moisture over Canadian Arctic tundra: Trail Valley Creek, Northwest Territories [Canada] dataset
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Humphrey, Rachel E.; Adams, Justin R.; Berg, Aaron A.; Marsh, Philip — 2017-02-17 Synthetic aperature radar (SAR) remote sensing offers a technology potentially capable of capturing information about soil moisture at high spatial and temporal resolutions. This method has been shown to be effective in lower latitude environments however there has been a lack of investigation in arctic environments, particularly in organic permafrost soils. A preliminary analysis was performed at Trail Valley Creek, Northwest Territories, where an investigation of the statistical spatial variability of soil moisture and processes controlling soil moisture was completed. Both of these are key steps required for modeling soil moisture retrievals from satellites. Second, an assessment of the sensitivity of RADARSAT-2 backscatter to surface soil moisture conditions was completed to examine whether SAR can provide a much needed method to map soil moisture across the arctic. Results showed a strong relationship between backscatter and soil moisture (R2 =0.688) and demonstrate the potential for SAR soil moisture retrieval in arctic ecosystems.
University of Guelph Dataverse Translation missing: fr.blacklight.search.logo
Validation of SMAP retrieval in an Arctic tundra environment: Trail Valley Creek, Northwest Territories [Canada] dataset
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Wrona, Elizabeth; Rowlandson, Tracy L.; Nambiar, Manoj; Berg, Aaron A.; Colliander, Andreas; Marsh, Philip — 2017-03-10 This study examines Soil Moisture Active Passive (SMAP) soil moisture product on the EASE-2 36km Global cylindrical and North Polar azimuthal grids relative to two in situ soil moisture monitoring networks that were installed in 2015 and 2016. Results indicate that there is no relationship between the SMAP Level-2 passive soil moisture product and the upscaled in situ measurements. Additionally, there is very low correlation between modeled brightness temperature using the Community Microwave Emission Model and the Level-1 C SMAP brightness temperature interpolated to the EASE-2 Global grid; however, there is a much stronger relationship to the brightness temperature measurements interpolated to the North Polar grid, suggesting that the soil moisture product could be improved with interpolation on the North Polar grid.

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(source : University of Guelph Dataverse) AND (auteur : Marsh, Philip)

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