Acclimation of soil respiration to warming Unclipped Clipped 40 6 a a:Unclipped 30 5 Isocline of full acclimation 20 10 3 Unwarmed 0 2 89 Warmed 40 30 0 20 b:Clipped 10 Isocline of full acclimation 4 Unwarmed -Warmed 苏 3 Unwarmed 百 Warmed 2 1 NDJFMAMJJASON NDJFMAMJJASON 15 20 25 30 35 Month Month Soil temperature(OC) Luo et al.2001 Nature 0 1 2 3 4 5 6 Soil temperature (oC) 5 10 15 20 25 30 35 Soil respiration ( μmol m-2 s-1 ) 0 1 2 3 4 5 Warmed Warmed Unwarmed Unwarmed Isocline of full acclimation Isocline of full acclimation b: Clipped a: Unclipped Luo et al. 2001 Nature Acclimation of soil respiration to warming Soil temperature (oC) 0 10 20 30 40 Unclipped Soil moisture content (%) 0 10 20 30 40 Clipped c Month Soil respiration (μmol m-2 s-1) 0 1 2 3 4 5 Unwarmed Warmed Month d e f N D J F M A M J J A S O N N D J F M A M J J A S O N a b