Table 2 Mean net carbon uptake period (CUP, days) and maximum rates of net ecosystem CO2 exchange (NEEmax, g C m−2 day−1), gross primary production (GPPmax, g C m−2 day−1), and evapotranspiration (ETmax, mm day−1) with the standard deviation and coefficient of variation (CV) at ten forest sites
Site | CUP | NEEmax | GPPmax | ETmax |
|---|---|---|---|---|
US-SP1 | 235 | −4.16 ± 0.61 | 7.97 ± 2.07 | 4.16 ± 0.47 |
US-DK3 | 365 | −7.75 ± 0.90 | 17.48 ± 2.24 | 5.76 ± 2.57 |
US-NC2 | 365 | −7.02 ± 1.88 | 14.98 ± 0.97 | 6.26 ± 0.68 |
US-Ho1 | 217 | −5.33 ± 0.72 | 12.50 ± 0.83 | 4.2 ± 0.34 |
US-Ho2 | 217 | −5.12 ± 0.36 | 11.67 ± 1.30 | 4.32 ± 0.57 |
US-NR1 | 169 | −3.78 ± 0.80 | 7.06 ± 0.77 | 4.91 ± 0.64 |
US-Fuf | 210 | −3.42 ± 0.45 | 6.71 ± 0.65 | 3.96 ± 0.50 |
US-Me2 | 297 | −5.97 ± 0.55 | 9.75 ± 0.46 | 4.06 ± 0.43 |
US-Blo | 321 | −5.27 ± 1.28 | 7.65 ± 1.25 | 5.22 ± 0.92 |
US-Wrc | 121 | −5.38 ± 0.49 | 9.51 ± 1.63 | 4.31 ± 0.59 |
CV (%) | 33 | 26 | 34 | 17 |