Spreadsheets containing raw and summary data collected on diameter at point of browse by snowshoe hares in eastern Gates of the Arctic National Park and the Middle Fork Koyukuk River valley.

Weather and snow depth data (two files) for the annual snowshoe hare track count, usually held in March.

Annual snowshoe hare track counts conducted in late winter/early spring in eastern Gates of the Arctic National Park near Wiseman, Alaska, central Brooks Range, Alaska.

Annual snowshoe hare track counts conducted in late winter/early spring in eastern Gates of the Arctic National Park near Wiseman, Alaska, central Brooks Range, Alaska.

We collected snow density measurements at camera sites from December 2020 - April 2021, at the same time as snow hardness measurements. We took measurements every few weeks as logistics allowed. We took samples near the camera site in snow visually similar to the snow in the camera viewshed (the geographical area that is visible from a location) to prevent snow conditions from being disturbed beyond normal camera deployment. We took snow density samples using a homemade prairie sampler in snow depths < 100 cm and using a federal snow sampler in snow depths > 100 cm. The sampler was inserted into the snow to remove a snow core. We retained the core if the depth of snow in the sampler was at least 90% of the actual snow depth and the base of the snowpack had been reached as evidenced by litter or a soil plug at the base of the core. After we removed the soil plug, we weighed the core to determine its snow-water equivalent (SWE). We converted the SWE measured with the samplers into a density measurement by dividing the SWE by the snow depth. If a snow core of adequate quality could not be obtained after several minutes of effort, we did not measure snow density on that sampling occasion.

The data set presents snow pit measurements collected during the NASA SnowEx March 2023 Intensive Observation Period (IOP) in Alaska, USA to use for calibration and validation with coincident airborne SWESARR and lidar measurements as part of the strategy focused on snow water equivalence (SWE) and snow depth (HS). In total, 170 snow pits were excavated between the five sites at locations representing a range of snow depth, vegetation, and topographic conditions. Three study areas represented boreal forest snow near Fairbanks, AK: Farmers Loop Creamers Field (FLCF), Caribou Poker Creek Research Watershed (CPCRW), and Bonanza Creek Experimental Forest (BCEF). Two study areas represented Arctic tundra snow: Arctic Coastal Plain (ACP) and Upper Kuparuk Toolik (UKT).

This dataset contains three field seasons of snow-wildlife observations conducted at 707 sites from January 2021 to March 2023 in Washington and Alaska, spanning a broad range of snow conditions. Relatively fresh tracks (usually <24 h) of common large mammal predators (bobcats, coyotes, cougars, and wolves) and their ungulate prey (caribou, Dall sheep, moose, mule deer, and white-tailed deer) were investigated to determine how snow affects predator-prey interactions. The track sink depth and dimensions (width and length) of three consecutive footprints were measured from one individual. Age class was recorded for moose based either on visual confirmation of an individual creating snow tracks or based on track dimensions. The ability to differentiate age classes for smaller ungulates was more uncertain, so age classes for deer, caribou, or sheep were not specified. Animal gait was identified using a simple classification scheme. Data also include animal species, snow density, hardness, total ice, surface temperature, and vegetation type. To best capture snow hardness, surface penetrability and hand-hardness were measured throughout the snowpack. The data are provided in comma-separated values (CSV) format.

Transects and plot locations for the Snowshoe Hare Ecology Project, Wiseman, Alaska. Data columns: SITE : chr "Gold" "Gold" "Gold" "Gold" ... TRANSECT : chr "B" "B" "C" "C" ... PLOT : int 10 12 9 12 13 15 16 18 1 2 ... STAKE : chr "North" "North" "South" "North" ... POINTTYPE : chr "Center point" "Center point" "Center point" "Center point" ... ISEXTANT : logi TRUE TRUE TRUE TRUE TRUE TRUE ... ISCURRENTG: chr "Yes" "Yes" "Yes" "Yes" ... ISOUTPARK : chr "Yes" "Yes" "Yes" "Yes" ... UNITCODE : chr "GAAR" "GAAR" "GAAR" "GAAR" ... REGIONCODE: chr "AKR" "AKR" "AKR" "AKR" ... CREATEDATE: chr "6/12/2024" "6/12/2024" "6/12/2024" "6/12/2024" ... CREATEUSER: chr "D. DiFolco" "D. DiFolco" "D. DiFolco" "D. DiFolco" ... EDITDATE : chr "6/12/2024" "6/12/2024" "6/12/2024" "6/12/2024" ... MAPMETHOD : chr "GNSS: Mapping Grade" "GNSS: Mapping Grade" "GNSS: Mapping Grade" "GNSS: Mapping Grade" ... SOURCEDATE: chr "6/12/2024" "6/12/2024" "6/12/2024" "6/12/2024" ... XYACCURACY: chr ">=5cm and <50cm" ">=5cm and <50cm" ">=5cm and <50cm" ">=5cm and <50cm" ... PHOTO_N : chr "" "" "" "" ... PHOTO_S : chr "" "" "" "" ... PHOTO_E : logi NA NA NA NA NA NA ... PHOTO_W : chr "" "" "" "" ... PHOTO_O : chr "" "" "" "" ... Latitude : num 67.5 67.5 67.5 67.5 67.5 ... Longitude : num -150 -150 -150 -150 -150 ...

Dataset of snowshoe hare pellet counts across quadrats and sites for surveys conducted 1990-2024 at Tetlin National Wildlife Refuge. Raw data is used to monitor hare density on the refuge over time. For a record of data manipulation for data tidying, see ServCat reference: 187751.

The data set contains snow depth measurements from five study sites in Alaska, USA; data were collected during the March 2023 intensive observation period (IOP) as part of the NASA SnowEx 2023 field campaign. The study sites include three boreal forest sites in the Fairbanks region of central Alaska (the Bonanza Creek Experimental Forest, Caribou Poker Creek watershed, and Farmer’s Loop/Creamer’s Field) and two coastal tundra sites in the North Slope region (Arctic coastal plain and Upper Kuparuk Toolik). Snow depth measurements collected from the study sampling sites during the previous field season are available as SnowEx23 Mar22 IOP Snow Depth Measurements, Version 1.