Table 2.

Previous and our new best estimates (in bold) of the latitudinal partitioning of land fluxes over four time periods. All values are in PgC yr⁻¹. Values are indicated by the model mean±1 standard deviation or 1σ error uncertainties. Regarding the T3L2 period (Gurney et al., 2004), our new estimate for the 1992–1996 period comes from the intercept of the fit lines with the observations in Fig. 2b, and the uncertainties on these values come from the standard error on these metrics from the fits. Regarding the RECCAP period (Peylin et al., 2013), our new estimate for the 2001–2004 period is the average of the five new models from this study.

Time period	Source	Number of models	NET land	T+SET land
1992–1996	T3L2	12	−2.42±1.05	0.95±1.17
	Stephens et al. (2007)	3	−1.52±0.53	−0.49±0.25
	T3L2 (intercept)	12	−1.70±0.59	0.15±0.66
2001–2004
	RECCAP all models	11	−2.25±0.58	0.93±0.90
	RECCAP Group 1	5	−1.85±0.25	0.34±0.27
	This study	5	−1.67±0.46	0.34±0.27
2009–2011
	This study	10	−2.24±0.29	−0.38±0.31
2004–2014
	This study	6	−2.17±0.36	−0.05±0.11