{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Kaj E Williams", "hasEmail": "mailto:kewilliams@usgs.gov"}, "description": "Sand covers a significant portion of the Earth\u2019s surface, including the Grand Falls area of Coconino County, AZ. The vadose zone (unsaturated zone) in a soil is of particular interest because it is broadly applicable to desert soils, which are seldom saturated and usually dry. In the absence of strong geothermal heating, the near-surface soil temperature profile is expected to exhibit maximum variation (for a given diurnal period) at the surface, with the diurnal variations becoming successively damped with depth. The temperature at a given depth is the result of diffusive heat transport vertically within the soil column. Water vapor also is expected to be transported via diffusion through the soil column [1].\nWe have selected a sand sheet within the Grand Falls Dune Field (GFDF) and deployed temperature and relative humidity sensors at 5 different depths: 1, 6, 12, 24, and 48 cm to capture diurnal temperature and humidity variations. \n[1] Hillel, D., (1980) Fundamentals of Soil Physics", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/P9BXCN7E", "description": "Landing page for access to the data", "format": "XML", "mediaType": "application/http", "title": "Digital Data"}, {"@type": "dcat:Distribution", "description": "The metadata original format", "downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.614b9975d34e0df5fb97c6e3.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_614b9975d34e0df5fb97c6e3", "keyword": ["Arizona", "Grand Falls", "Relative humidity", "Sand sheet", "USGS:614b9975d34e0df5fb97c6e3", "climatologyMeteorologyAtmosphere", "deserts", "dunes", "geoscientificInformation", "soil temperature", "subsurface profiler"], "modified": "2021-09-29T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-111.1681, 35.4345, -111.1680, 35.4346", "theme": ["geospatial"], "title": "Temperature and relative humidity profiles at Grand Falls dune field, Arizona, collected from December 2020 to April 2021"}