SPRUCE experimental plot showing the environmental monitoring mast and visible infrastructure for belowground gas flux and pore water measurements prior to the addition of the aboveground enclosure. More images available at https://mnspruce.ornl.gov/.
Credit or Source: Office of Biological and Environmental Research of the U.S. Department of Energy Office of Science. science.energy.gov/ber/
U.S. DOE. July 2015. Spruce and Peatland Responses Under Climatic and Environmental Change. U.S. Department of Energy Office of Science. (PDF)