Supplementary information Table S1. Summary statistics of the relationship between wintertime CO2 flux (Fc,a, umol m−2 s−1) and sensible heat (H, W m−2) and meteorological conditions at the 64 eddy flux sites. Air Absolute Vegetation Site ID Slope R2 temperature humidity Equipment Reference type (℃) (g m-3) CA-Qcu −0.003 0.23 −15.47 LI-7500+CSAT3 ENF Giasson(2006) CA-SF1 −0.017 0.68 −14.99 1.76 LI-7500+CSAT3 ENF Amiro (2010) CA-SF2 −0.011 0.73 −16.82 1.44 LI-7500+CSAT3 ENF Amiro (2010) CA-SF3 −0.014 0.85 −14.39 1.71 LI-7500+CSAT3 OSH Amiro (2010) CA-TP1 0.0002 0.09 −6.51 LI-7500+CSAT3 ENF Peichl (2010) CN-Arou −0.005 0.86 −12.74 3.23 LI-7500+CSAT3 GRA Liu et al. (2011) Yu et al. CN-Cha −0.004 0.92 −12.57 1.27 LI-7500+CSAT3 ENF (2006b) Yu et al. CN-Cng −0.008 0.98 −13.48 1.04 LI-7500+CSAT3 GRA (2006b) Yu et al. CN-Dan −0.002 0.95 −8.41 1.02 LI-7500+CSAT3 GRA (2006b) Zhang et al. CN-Du2 0.001 0.70 −14.21 1.16 LI-7500+CSAT3 GRA (2007) CN-Gebi −0.007 0.90 −6.34 6.46 LI-7500+CSAT3 BAR Liu et al. (2011)
Supplementary information Table S1. Summary statistics of the relationship between wintertime CO2 flux (Fc,a, umol m−2 s−1) and sensible heat (H, W m−2) and meteorological conditions at the 64 eddy flux sites. Site ID Slope R2 Air temperature (℃) Absolute humidity (g m-3) Equipment Vegetation type Reference CA-Qcu −0.003 0.23 −15.47 LI-7500+CSAT3 ENF Giasson(2006) CA-SF1 −0.017 0.68 −14.99 1.76 LI-7500+CSAT3 ENF Amiro (2010) CA-SF2 −0.011 0.73 −16.82 1.44 LI-7500+CSAT3 ENF Amiro (2010) CA-SF3 −0.014 0.85 −14.39 1.71 LI-7500+CSAT3 OSH Amiro (2010) CA-TP1 0.0002 0.09 −6.51 LI-7500+CSAT3 ENF Peichl (2010) CN-Arou −0.005 0.86 −12.74 3.23 LI-7500+CSAT3 GRA Liu et al. (2011) CN-Cha −0.004 0.92 −12.57 1.27 LI-7500+CSAT3 ENF Yu et al. (2006b) CN-Cng −0.008 0.98 −13.48 1.04 LI-7500+CSAT3 GRA Yu et al. (2006b) CN-Dan −0.002 0.95 −8.41 1.02 LI-7500+CSAT3 GRA Yu et al. (2006b) CN-Du2 0.001 0.70 −14.21 1.16 LI-7500+CSAT3 GRA Zhang et al. (2007) CN-Gebi −0.007 0.90 −6.34 6.46 LI-7500+CSAT3 BAR Liu et al. (2011)