Author Correction: Large emissions of CO2 and CH4 due to active-layer warming in Arctic tundra

In the version of this article initially published, there was typographical error in the gas species and units listed in the Fig. 4 y-axis label, now reading "CH 4 flux (nmol m -2 s -1 )," which was originally written as "CO 2 Flux (umol m -2 s -1 )," with an associated error in the last sentence of the Results, where in the text now reading "Likewise, CH 4 , emissions in heated plots increased to more than 100 times those in the snow-free season (24.53, 27.06, 70.75, and 146.91 nmole m -2 s -1 ), whereas control plots had a net CH 4 uptake of -0.12 nmole m -2 s -1 during the same time period," the two instances of "nmole" were originally written "mole.