| Summary: | Snow depth measurements were recorded in March 2018 as part of Environment and Climate Change Canada's 2017-2018 Trail Valley Creek Snow Experiment (TVCSnow 17/18). These snow depths were collected to investigate the relationship between snow microstructure and airborne and ground-based passive microwave radiometer measurements of snow in a tundra environment to develop improved methods for retrieving tundra snow water equivalent and atmospheric profiles of temperature and humidity. Snow depths were recorded 50 km north of the town of Inuvik, Northwest Territories. Measurements took place from March 16th to 23rd 2018 in and around the Trail Valley Creek research station. The snow depth measurements were recorded with an automatic snow depth probe (magnaprobe). Open Government Licence - Canada (https://open.canada.ca/en/open-government-licence-canada) A total of 13,263 snow depth measurements were collected in an open tundra environment between March 16th and 23rd 2018. Survey transects of several hundred meters were measured along predefined airborne flight lines, optical aerial drone survey areas and adjacent to excavated snow pits/ground-based radiometer sites where manual and automated in situ snow measurements of density, specific surface area, snow grain and layering characteristics were recorded. The snow depth measurements were recorded using magnaprobes that can measure both depth and position simultaneously, patented in 1999 (United States Patent 5,864,059, 1999) and produced commercially by Snow‐Hydro LLC. The nature of the substrate beneath the snow controls the snow depth vertical accuracy with errors ranging from near zero for hard bases to +5 cm of over-probe in soft vegetation and the horizontal positional accuracy is typically ±2.5 m using the onboard Wide Area Augmentation System‐enabled GPS (Sturm and Holmgren, 2018). A 2018 experiment within the same study region (unpublished) examined the level of over-probe in and around a single snow pit, documenting an average over-probe penetration of ...
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