FIGURE 3.

Net ecosystem fluxes. (a) Gross primary productivity, ecosystem respiration, and net CO₂ flux across the thaw gradient (with positive values indicating net flux to the atmosphere) estimated as a 24‐h average from July measurements (peak growing season) under light and dark conditions in autochambers. (b) Flows of C to the atmosphere via litter, net CO₂ exchange, net CH₄ exchange, net C balance (from both CO₂ and CH₄), and in CO₂‐equivalents (assuming a CH₄ Global Warming Potential of 28)