Table 1.

Current SOC accumulation rates, soil and vegetation C stocks, and their changes in the PMFB from AD 2014 to 2100 in RCP 2.6 and RCP 8.5 scenarios (see RCP 4.5 in Future Projection)

Ecosystem type	Soil C accumulation rates, g⋅C⋅m−2⋅y−1			SOC, Pg			Vegetation C, Pg
	Current	RCP 2.6	RCP 8.5	Current	RCP 2.6	RCP 8.5	Current	RCP 2.6	RCP 8.5
PF
Mean	15.02	11.88	−89.95	0.511	+0.003	−0.023	0.022	+0.0004	−0.0021
Range	7.9–18.9	6.3–14.5	−135.3, −56.7	0.269–0.646	0.0016–0.0037	−0.035, −0.015	0.0215–0.0218
PSs
Mean	64.69	26.09	−135.23	2.779	+0.052	−0.264	0.318	+0.0044	−0.02
Range	34–101.8	15.2–43.9	−160.4, −102	1.459–4.376	0.03–0.09	−0.313, −0.199	0.316–0.349
OPs
Mean	29.53	14.69	−63.84	0.229	+0.005	−0.022	∼0	∼0	∼0
Range	13.5–41.5	8–17.3	−98.2, −40.9	0.105–0.322	0.0027–0.0059	−0.034, −0.014	∼0
Nonpeatland
Mean	0.1	1.64	−25.22	0.403	+0.007	−0.104	0.764	+0.01	−0.0482
Range	0.09–0.11	1.54–1.76	−32.8, −22.1	0.375–0.433	0.0066–0.0075	−0.136, −0.091	0.759–0.768
Total (peatlands)
Mean	55.98	23.42	−122.7	3.519	+0.06	−0.309	0.34	+0.0048	−0.0221
Range	29.1–85	14.9–31.5	−151.7, −90.5	1.833–5.344	0.03–0.1	−0.382, −0.228	0.338–0.369
Peatlands+nonpeatland
Mean	16.08	7.89	−53.25	3.922	+0.067	−0.413	1.104	+0.0148	−0.0703
Range	9.1–23.7	4.3–12.2	−66.82, −41.2	2.208–5.777	0.037–0.108	−0.518, −0.319	1.097–1.137

Current soil organic accumulation rates are mean rates and uncertainty ranges over the simulation periods till AD 2014 and total rates are area-weighted means. The uncertainty ranges of the “simulation” are from the uncertainty of the parameterization plus the uncertainty from the climate data interpolation. “+” and “−” in SOC and vegetation C columns indicate C accumulation and loss the from AD 2014 to AD 2100.