Fig. 6: Location of tundra-soil warming experiment and schematic for plot infrastructure.
From: Large emissions of CO2 and CH4 due to active-layer warming in Arctic tundra
a Map shows location of Utqiaġvik (formerly Barrow), AK, location of the Barrow Environmental Observatory (BEO) on the North Slope of Alaska. Background map credit: https://www.freeworldmaps.net/united-states/alaska/map.html. b Aerial image of plots on flat-centered polygonal tundra of the BEO. The dark area at base of each white teardrop is one experiment block comprising mesocosms, trail mat, and warming infrastructure. Source of underlying satellite image: Google Earth, July 2016, centered on 71°16′28.88″N, 156°37′59.26″W. Image © 2024 Maxar Technologies, Image Landsat / Copernicus. c Cross-section schematic of experimental plot. Each plot was instrumented with three temperature probes containing five thermistors each and one rod in the center (in heated plots the rod contained heater wire, indicated by red line). The rods were 60 cm long, inserted to a depth of 55 cm. d Aerial-view of the 25 cm diameter plots. The monitoring probes were 6 cm (M1) and 10 cm (M2) from the center. The regulator probe (Reg) used to control heating was 8 cm from center.
