Table 2.
The result of the multiple linear regressions (MLR) for annual anomalies of NEP, Reco, GPP and E. Parameters RPD and Gs_diff are mean values during growing season, GPP_diff and Rh_diff are annual totals. The MLR was performed using the statistic package in Sigmaplot 12.5 [26].
| dependent variable | parameter | coefficient | standard error | p | adjusted r2 |
|---|---|---|---|---|---|
| NEP_diff (g C m−2 yr−1) |
constant | 134 | 35.2 | 0.005 | 0.934 |
| RPD (−) | −495 | 96.9 | <0.001 | ||
| Rh_diff (g C m−2 yr−1) | −0.584 | 0.093 | <0.001 | ||
| Reco_diff (g C m−2 yr−1) |
constant | −212 | 69.2 | 0.015 | 0.826 |
| RPD (−) | 868 | 194 | 0.002 | ||
| GPP_diff (g C m−2 yr−1) | 1.31 | 0.188 | <0.001 | ||
| GPP_diff (g C m−2 yr−1) |
constant | 474 | 107 | 0.002 | 0.718 |
| RPD (−) | −526 | 203 | 0.032 | ||
| Gs_diff (m s−1) | 44 060 | 10 672 | 0.003 | ||
| E_diff (mm yr−1) |
constant | 228 | 38.7 | <0.001 | 0.749 |
| GPP_diff (g C m−2 yr−1) | −0.347 | 0.0690 | 0.002 | ||
| Gs_diff (m s−1) | 19 530 | 3685 | 0.001 | ||
| RPD (−) | −243 | −4.53 | 0.003 |