Table 2.

Statistics of the relationships shown in Figure 4

Ecosystem photosynthetic capacity	Model	Distance correlation	R 2	adj. R 2	Intercept ± SE	Slope ± SE	p	RRMSE	EF	df
GPPsat	N%	0.73	0.50	0.47	15.67 ± 3.51	7.25 ± 1.71	.0005	26.2	0.31	1 + 18
$\overline{GP{P}_{\mathrm{sat}}}$	N%	0.67	0.39	0.36	16.89 ± 3.95	6.57 ± 1.93	.003	29.09	0.18	1 + 18
$\overline{GP{P}_{\mathrm{sat}}}$	N%TRY	0.56	0.27	0.23	14.88 ± 5.74	8.55 ± 3.28	.018	30.65	0.09	1 + 18
${\mathrm{GPP}}_{\mathrm{sat}.\mathrm{structure}}$	N%	0.63	0.37	0.34	20.45 ± 5	7.62 ± 2.39	.005	30	0.10	1 + 17
$\overline{GP{P}_{\mathrm{sat}.\mathrm{structure}}}$	N%	0.58	0.32	0.28	21.18 ± 4.87	6.59 ± 2.33	.01	25.5	−0.15	1 + 17
$\overline{GP{P}_{\mathrm{sat}.\mathrm{structure}}}$	N%TRY	0.47	0.20	0.15	20.08 ± 7.01	8.07 ± 3.94	.06	26.1	−0.20	1 + 17

Ecosystem photosynthetic capacity estimates with macron accent are averaged over several years at each site and those without macron accent are from the year of leaf sampling. RRMSE and EF are estimated in a cross‐validation with leave‐one‐out mode and represents, relative root mean square error, and model efficiency, respectively. The number of FLUXNET sites that are used with GPP^sat are 20, but 19 of the sites have GPP_{sat.structure} available.