Northern Global Change Research Program

AK	AL	AR
AZ	CA	CO
CT	DE	FL
GA	HI	IA
ID	IL	IN
KS	KY	LA
MA	MD	ME
MI	MN	MO
MS	MT	NC
ND	NE	NH
NJ	NM	NV
NY	OH	OK
OR	PA	RI
SC	SD	TN
TX	UT	VA
VT	WA	WI
WV	WY
Close Window

EPA Logo

Publications & Products

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

Wisconsin 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	14,727	15,214	15,701	97	97	97
Other forest land	331	196	61	-27	-27	-27
Reserved timberland	261	231	201	-6	-6	-6
TOTAL	15,319	15,641	15,963	64	64	64

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
White-red-jack pine	1,286	1,243	1,200	-9	-9	-9
Spruce-fir	1,586	1,477	1,367	-22	-22	-22
Longleaf-slash pine (planted)	0	0	0	0	0	0
Longleaf-slash pine (natural)	0	0	0	0	0	0
Loblolly-shortleaf pine (planted)	0	0	0	0	0	0
Loblolly-shortleaf pine (natural)	12	6	0	-1	-1	-1
Oak-pine	0	0	0	0	0	0
Oak-hickory	2,881	2,904	2,928	5	5	5
Oak-gum-cypress	0	0	0	0	0	0
Elm-ash-cottonwood	1,330	1,444	1,559	23	23	23
Maple-beech-birch	4,094	4,721	5,349	125	125	125
Aspen-birch	3,956	3,698	3,441	-51	-51	-51
Other forest types	0	0	0	0	0	0
Non-stocked	175	147	120	-5	-5	-5
TOTAL	15,319	15,641	15,963	64	64	64

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
White-red-jack pine	114.3	111.7	109.5	-0.51	-0.45	-0.48
Spruce-fir	124.2	113.4	102.7	-2.17	-2.14	-2.15
Longleaf-slash pine (planted)	0.0	0.0	0.0	0.00	0.00	0.00
Longleaf-slash pine (natural)	0.0	0.0	0.0	0.00	0.00	0.00
Loblolly-shortleaf pine (planted)	0.0	0.0	0.0	0.00	0.00	0.00
Loblolly-shortleaf pine (natural)	0.6	0.3	0.0	-0.06	-0.06	-0.06
Oak-pine	0.0	0.0	0.0	0.00	0.00	0.00
Oak-hickory	230.0	238.5	247.1	1.71	1.71	1.71
Oak-gum-cypress	0.0	0.0	0.0	0.00	0.00	0.00
Elm-ash-cottonwood	109.7	115.8	121.8	1.23	1.20	1.22
Maple-beech-birch	381.3	437.9	493.8	11.32	11.18	11.25
Aspen-birch	309.5	286.5	263.8	-4.60	-4.54	-4.57
Other forest types	5.0	3.7	1.7	-0.26	-0.39	-0.32
Non-stocked	10.9	9.5	8.1	-0.29	-0.29	-0.29
TOTAL	1,285.4	1,317.3	1,348.4	6.39	6.22	6.31

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	302.2	321.7	341.2	3.90	3.90	3.90
Forest floor and coarse woody debris	130.7	129.8	128.6	-0.19	-0.24	-0.21
Soils	794.4	799.1	803.7	0.93	0.92	0.93
Wood products and landfills	58.0	66.8	75.0	1.75	1.64	1.69
TOTAL	1,285.4	1,317.3	1,348.4	6.39	6.22	6.31

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	123.1	124.4	125.5	0.26	0.23	0.25
Other Public	248.6	261.3	274.0	2.56	2.54	2.55
Forest Industry	104.0	100.9	97.7	-0.63	-0.64	-0.63
Other Private	809.7	830.7	851.2	4.20	4.09	4.15
TOTAL	1,285.4	1,317.3	1,348.4	6.39	6.22	6.31

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	0.2	1.5	0.04	0.26	0.15
Forest floor and coarse woody debris	0.0	-0.1	-0.2	-0.02	-0.02	-0.02
Soils	0.0	-0.2	-0.3	-0.04	-0.02	-0.03
Wood products and landfills	0.0	0.1	0.1	0.01	0.02	0.01
TOTAL	0.0	-0.1	1.1	-0.01	0.23	0.11

Page Contact: Kevin McCullough