Soil temperature (DP1.00041.001)

When possible the soil plots were arranged in a transect with the first plot approximately 15-40 m from the tower in the expected dominant airshed. The middle of airshed was used as the transect vector and plot spacing was based on the distance required for surface soil temperature and moisture measurements to be spatially independent at the 1 hectare scale during site characterization (capped at approximately 40 m due to logistical constraints). Soil plots were microsited as necessary to avoid obstacles (e.g., boulders, streams, and paths) and more compact plot layouts were used at small sites. Soil temperature is measured at up to nine depths within each plot, with the mid-point of the shallowest sensors at approximately 2, 6, 16, and 26 cm. Depths for deeper sensors vary among sites and are based on megapit soil horizon data (NEON.DP1.00097) and depth to restrictive feature (see NEON.DOC.003146). Instrumentation: Thermometrics - Climate RTD 100-ohm Probe