Current aboveground live tree carbon stocks and annual net change in forests of conterminous United States

Table 1 Average annual change (tC/ha/y) and average carbon stock on a per area basis (tC/ha) for aboveground live tree carbon by region (refer to Fig. 1 for regions)

Region	Avg. Ann. change (tC/ha/y)	Number of paired plots	Avg. C stock (tC/ha)	SEM (tC/ha)
Northeast	0.55	8157	70.9	0.28
Northern Lake States	0.40	8094	43.9	0.23
South Central	0.90	9163	53.7	0.21
Southeast	0.96	7576	59.5	0.30
Central States	0.38	3325	57.7	0.37
Great Plains	0.08	423	11.6	0.09
Rocky Mountain—North	− 0.07	3076	40.2	0.43
Rocky Mountain—South	− 0.18	7797	20.1	0.16
Pacific Northwest—East	0.45	3857	46.1	0.57
Pacific Northwest—West	1.74	3336	130.0	1.23
Pacific Southwest	0.58	2536	76.6	0.98

Note that regional stocks are calculated following Bechtold and Patterson [18] while net annual change is based on a subset of the remeasured forest plots remaining forest (see “Methods”)
SEM standard error of the mean

ISSN: 1750-0680