Table 2. Estimated carbon stocks to a depth of 120 cm.

					Sum	Area
	0–30 cm	31–60 cm	61–90 cm	91–120 cm	0–120 cm	(106 ha)
PgC stored by depth increment for the inference population
Conterminous United States	2.63±0.12	2.08±0.15	1.76±0.19	1.08±0.12	7.54±0.59	25.2
Region
Tidal Saline	0.20±0.03	0.17±0.03	0.18±0.06	0.20±0.09	0.76±0.21	2.2
Coastal Plains	0.83±0.05	0.56±0.05	0.38±0.06	0.28±0.06	2.05±0.21	10.4
E. Mts & Upper Midw	1.24±0.10	1.09±0.13	0.98±0.15	0.55±0.09	3.86±0.47	8.1
Interior Plains	0.27±0.02	0.17±0.03	0.10±0.02	0.07±0.02	0.60±0.08	3.1
West	0.08±0.01	0.07 ±0.01	0.08±0.01	0.07±0.01	0.30±0.04	1.4
Carbon type
Blue (tidal saline)	0.20±0.03	0.17±0.03	0.18±0.06	0.20±0.09	0.76±0.21	2.2
Teal (all others)	2.42±0.12	1.91±0.15	1.59±0.18	0.93±0.11	6.85±0.55	23.0
Disturbance category
Least disturbed	0.70±0.04	0.58±0.06	0.49±0.07	0.48±0.11	2.25±0.28	5.5
Intermediate disturbed	1.29±0.09	1.04±0.11	0.90±0.13	0.52±0.09	3.75±0.42	12.7
Most disturbed	0.64±0.09	0.47±0.10	0.37±0.12	0.15±0.02	1.63±0.33	7.0
PgC stored by depth increment for the target population
Conterminous United States	4.02	3.17	2.68	1.64	11.52	38.4
Region
Tidal Saline	0.20	0.20	0.22	0.25	0.87	2.7
Coastal Plains	1.37	0.92	0.64	0.47	3.39	17.1
E. Mts & Upper Midw	1.53	1.35	1.22	0.68	4.78	10.0
Interior Plains	0.27	0.26	0.16	0.11	0.80	5.0
West	0.08	0.19	0.19	0.19	0.66	3.6
Carbon type
Blue (tidal saline)	0.20	0.20	0.22	0.25	0.87	2.7
Teal (all others)	3.25	2.72	2.21	1.45	9.63	35.7

E. Mts & Upper Midw, Eastern Mountains and Upper Midwest.

Carbon stock estimates (PgC) for geographic regions, carbon type and disturbance category are provided for (a) the inference population and (b) the target population. Wetland area represented by each group is provided in 10⁶ ha. Means are presented with s.e.m. for the inference population. Means for disturbance category s.e.m. for all values are not presented for the target population data because they cannot be calculated for the wetland area not able to be sampled.