Extended Data Fig. 6: Relative importance of soil moisture and temperature on methane fluxes at Trail Valley Creek as well as the additional explanatory power of ecosystem respiration.
From: Arctic soil methane sink increases with drier conditions and higher ecosystem respiration
Relative importance of the two important predictors, surface soil temperature and soil water-filled pore space (WFPS), of methane (CH4) fluxes measured with automated chambers at Trail Valley Creek for lichen, shrub, and tussock sites, as well as the additional percentage of variance explained by ecosystem respiration (ER). Data were split by chamber (18 chambers) and month. The additional percentages of variance explained by ER is indicated as the % change of model fit compared to fitting the model to only soil temperature and WFPS. See Supplementary Fig. 7 for the same RF model using soil temperature at the 20-cm depth instead of surface soil temperature.
