Table 13 Spearman correlations computed between the different dataset (RMQS, LUCAS, STS) and Pi-lab simulated by McDowell et al.58, Zhang et al.12, GPASOIL-v0 or GPASOIL-v1.1.
Dataset used for the comparison | Spatial extent and years of sampling | Modeling approach | Years used in the modeling approach to compare with the dataset | Spearman correlation over cropland | Spearman correlation over grassland | Spearman correlation over cropland + grassland |
|---|---|---|---|---|---|---|
RMQS | France 2002–2009 | McDowell et al.58 | 2009 | +0.33 (p-value = 0.00) | +0.36 (p-value = 0.00) | |
Zhang et al.12 | 2010 | −0.09 (p-value = 0.27) | ||||
GPASOIL-v0 | 2005 | +0.03 (p-value = 0.77) | −0.11 (p-value = 0.27) | |||
GPASOIL-v1.1 | 2002–2009 | +0.01 (p-value = 0.94) | +0.32 (p-value = 0.00) | |||
LUCAS | France 2015 | McDowell et al.58 | 2009 | +0.39 (p-value = 0.00) | +0.56 (p-value = 0.00) | |
Zhang et al.12 | 2010 | +0.01 (p-value = 0.92) | ||||
GPASOIL-v0 | 2005 | +0.04 (p-value = 0.68) | −0.22 (p-value = 0.02) | |||
GPASOIL-v1.1 | 2015 | −0.01 (p-value = 0.89) | +0.07 (p-value = 0.34) | |||
LUCAS | Europe 2015 | McDowell et al.58 | 2009 | +0.56 (p-value = 0.00) | +0.58 (p-value = 0.00) | |
Zhang et al.12 | 2010 | −0.07 (p-value = 0.03) | ||||
GPASOIL-v0 | 2005 | +0.05 (p-value = 0.11) | −0.10 (p-value = 0.01) | |||
GPASOIL-v1.1 | 2015 | +0.18 (p-value = 0.00) | −0.13 (p-value = 0.00) | |||
STS | Canada and USA 2015 | McDowell et al.58 | 2009 | −0.20 (p-value = 0.35) | ||
GPASOIL-v0 | 2005 | −0.23 (p-value = 0.35) | ||||
GPASOIL-v1.1 | 2015 | +0.32 (p-value = 0.03) |
