Table 6 Comparisons of inventory-based site C stock changes (∆C 2 ) determined from plot means (live biomass and detrital fluxes), K-MSN scaling mean (standard deviation), and K-MSN with footprint weighting (K-MSN FPW) mean (standard deviation) to estimates of ∑NEP from flux towers and ∑NEP from CBM-CFS3 for the (a) 4-year period 2003–2006 Mg C ha −1 and the (b) mean annual value for each method in Mg C ha −1 yr −1
a) | Site | |||
|---|---|---|---|---|
Method | DF49 | HDF90 | HDF88 | HDF00 |
∆C2 Mean | 19.4 (7.2) | 2.0 (8.5) | −2.5 (13.3) | −10.1 (8.2) |
∆C2 K-MSN | 17.8 (5.8) ± 1.2 | na/ | 1.6 (11.7) ± 1.2 | −8.6 (5.0) ± 1.3 |
∆C2 K-MSN FPW | 19.5 (5.9) ± 1.2 | na/ | −0.2 (11.2) ± 1.2 | −7.7 (3.5) ± 1.3 |
ΣNEP Flux Tower | 13.6 ± 3.6 | na/ | −1.9 | −20.1 |
ΣNEP CBM-CFS3* | 18.9 | 2.0* | na/ | −11.5 |
ΣNEP CBM-CFS3 FPW | 24.1 | na/ | na/ | −17.9 |
b) | Site | |||
Method | DF49 | HDF90 | HDF88 | HDF00 |
∆C2 Mean | 4.9 (1.8) | 0.5 (2.1) | −0.63 (3.3) | −2.5 (2.0) |
∆C2 K-MSN | 4.5 (1.5) ± 1.2 | na/ | 0.4 (2.9) ± 1.2 | −2.2 (1.2) ± 1.3 |
∆C2 K-MSN FPW | 4.9 (1.5) ± 1.2 | na/ | −0.1 (2.8) ± 1.2 | −1.9 (1.9) ± 1.3 |
ΣNEP Flux Tower | 3.4 ± 0.9 | na/ | −0.5 | −5.0 |
ΣNEP CBM-CFS3* | 4.7 | 0.5* | na/ | −2.9 |
ΣNEP CBM-CFS3 FPW | 6.0 | na/ | na/ | −4.47 |