Datasets from laboratory and field measurements examining soil water status effects on CO₂ emissions

We compiled soil water-filled pore space and soil water content data, along with O₂ concentration measurements, from four sites within global cold and wet ecoystems to verify the impact of soil water status on O₂ diffusion in soils. Results from 21 laboratory incubation experiments were also collected to examine the effects of high (aerobic) and low (anaerobic) soil O₂ conditions on soil CO₂ emissions. Meanwhile, we compiled eddy covariance and chamber-based measurements of ecosystem respiration and soil respiration, along with observations of soil water content or ground water table level, from 107 filed sites to analyze impacts of soil water status on soil CO₂ emissions at ecosystem level.