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Publications & Products

Carbon in United States Forests and Wood Products, 1987-1997: State-by-State Estimates
by Richard A. Birdsey & George M. Lewis

California Estimate for 1987-1997

Table 1. Area by land class (1000 ac).
Land class	1987	1992	1997	Average Annual Change
				1987-1992	1992-1997	1987-1997
Timberland	16,712	17,332	17,952	124	124	124
Other forest land	17,766	16,196	14,626	-314	-314	-314
Reserved timberland	4,903	5,435	5,968	107	107	107
TOTAL	39,381	38,964	38,547	-83	-83	-83

Table 2. Area of forest land by forest type (1000 ac).
Forest type	1987	1992	1997	Average Annual Change
				1987-1992	1992-1997	1987-1997
Douglas-fir	1,718	2,060	2,402	68	68	68
Ponderosa pine	5,717	6,830	7,944	223	223	223
Western white pine	5	186	366	36	36	36
Fir-spruce	7,810	6,007	4,205	-361	-361	-361
Hemlock-Sitka spruce	59	41	24	-3	-3	-3
Larch	0	0	0	0	0	0
Lodgepole pine	952	702	452	-50	-50	-50
Redwood	1,270	1,090	910	-36	-36	-36
Other Hardwoods	9,781	9,327	8,873	-91	-91	-91
Other forest types	1,229	3,905	6,581	535	535	535
Pinyon-juniper	2,699	2,161	1,622	-108	-108	-108
Chaparral	8,021	6,424	4,827	-319	-319	-319
Non-stocked	120	231	341	22	22	22
Unused	0	0	0	0	0	0
TOTAL	39,381	38,964	38,547	-83	-83	-83

Table 3. Total carbon stock on forest land and annual change by forest type (MMTC).
Forest type	1987	1992	1997	Average Annual Change
				1987-1992	1992-1997	1987-1997
Douglas-fir	195.9	243.2	290.2	9.46	9.40	9.43
Ponderosa pine	497.7	626.5	757.8	25.76	26.25	26.01
Western white pine	0.4	15.5	30.7	3.02	3.03	3.03
Fir-spruce	810.7	636.3	455.5	-34.88	-36.17	-35.52
Hemlock-Sitka spruce	4.5	3.3	2.1	-0.24	-0.24	-0.24
Larch	0.0	0.0	0.0	0.00	0.00	0.00
Lodgepole pine	72.4	54.2	36.1	-3.62	-3.62	-3.62
Redwood	169.6	151.2	131.0	-3.68	-4.03	-3.85
Other Hardwoods	673.1	658.7	645.5	-2.87	-2.64	-2.76
Other forest types	104.0	326.5	549.0	44.51	44.49	44.50
Pinyon-juniper	203.6	159.4	114.9	-8.84	-8.89	-8.87
Chaparral	606.8	485.4	364.0	-24.28	-24.28	-24.28
Non-stocked	6.2	13.4	20.4	1.43	1.40	1.42
Unused	0.0	0.0	0.0	0.00	0.00	0.00
TOTAL	3,344.9	3,373.8	3,397.3	5.77	4.71	5.24

Table 4. Total carbon stock on forest land and annual change by accounting component (MMTC).
Accounting component	1987	1992	1997	Average Annual Change
				1987-1992	1992-1997	1987-1997
Biomass	963.5	988.7	1,014.1	5.04	5.09	5.06
Forest floor and coarse woody debris	685.8	678.7	670.8	-1.42	-1.58	-1.50
Soils	1,554.1	1,549.8	1,545.7	-0.85	-0.83	-0.84
Wood products and landfills	141.6	156.5	166.7	3.00	2.03	2.51
TOTAL	3,344.9	3,373.8	3,397.3	5.77	4.71	5.24

Table 5. Total carbon stock on forest land and annual change by owner (MMTC).
Owner group	1987	1992	1997	Average Annual Change
				1987-1992	1992-1997	1987-1997
National Forest	1,570.3	1,557.5	1,540.0	-2.56	-3.50	-3.03
Other Public	370.2	390.6	410.9	4.09	4.06	4.07
Forest Industry	303.2	330.7	357.0	5.48	5.27	5.38
Other Private	1,101.2	1,095.0	1,089.3	-1.24	-1.13	-1.19
TOTAL	3,344.9	3,373.8	3,397.3	5.77	4.71	5.24

Table 6. Change in total carbon stock on forest land attributed to land use change (MMTC).
Accounting component	1987	1992	1997	Average Annual Change
				1987-1992	1992-1997	1987-1997
Biomass	0.0	-7.4	-14.8	-1.47	-1.48	-1.48
Forest floor and coarse woody debris	0.0	-5.0	-9.9	-0.99	-0.99	-0.99
Soils	0.0	-5.3	-10.5	-1.07	-1.04	-1.05
Wood products and landfills	0.0	4.8	10.2	0.96	1.08	1.02
TOTAL	0.0	-12.8	-25.0	-2.57	-2.44	-2.50

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