Toward a long-term atmospheric CO2 inversion for elucidating natural carbon fluxes: technical notes of NISMON-CO2 v2021.1

Progress in Earth and Planetary Science

Table 2 Global-scale net sinks and errors for 2008–2017. The sink values do not include fossil fuel emissions. These errors are derived using root-mean-square errors against the true fluxes over the land, the ocean, and the global total carbon fluxes

Flux data	Sinks (Pg C yr⁻¹)			Root-mean-square errors (× 10⁻¹ g C m⁻² day⁻¹)
Flux data	Land	Ocean	Total	Land	Ocean	Total
True	2.62	2.04	4.67	n/a	n/a	n/a
Prior	4.61	1.41	6.02	5.92	0.33	5.93
CTL	3.39	1.29	4.68	3.48	0.29	3.49
NO_ERR	3.38	1.29	4.67	2.73	0.29	2.74
ICO	3.38	1.31	4.69	4.19	0.26	4.19
NO_WTS	3.39	1.26	4.65	4.61	0.32	4.62
ISO_ERR	3.38	1.31	4.69	4.52	0.29	4.53