Seasonal active layer measurements from a Circumpolar Active Layer Monitoring (CALM) grid, Barrow, Alaska, 2017

Active layer depth measurements were collected during the 2017 growing season at each Circumpolar Active Layer Monitoring (CALM) grid subset plot (30) located in Barrow, Alaska. At each plot two active layer depth measurements were acquired, the date, start and end times, and the people present were also recorded. Active layer depth measurements were taken outside of every plot on the northeastern most corner in order to reduce disturbance of vegetation. Data have been corrected by subtracting 0.5 centimeters from measurements made in the field to account for the missing tip of the probe. These measurements are part of the Arctic Observing Network (AON) - International Tundra Experiment (ITEX) initiative and help to document seasonal changes in surface moisture and structure at high spatial scales.