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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

Montana 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
14,736
16,950
19,164
443
443
443
Other forest land
4,379
2,413
448
-393
-393
-393
Reserved timberland
2,795
3,207
3,620
82
82
82
TOTAL
21,910
22,571
23,231
132
132
132
 
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
6,553
7,044
7,535
98
98
98
Ponderosa pine
2,773
2,934
3,096
32
32
32
Western white pine
36
21
6
-3
-3
-3
Fir-spruce
2,162
3,465
4,768
261
261
261
Hemlock-Sitka spruce
179
243
307
13
13
13
Larch
927
823
719
-21
-21
-21
Lodgepole pine
4,844
4,929
5,014
17
17
17
Redwood
0
0
0
0
0
0
Other Hardwoods
481
512
544
6
6
6
Other forest types
2,480
1,809
1,138
-134
-134
-134
Pinyon-juniper
83
90
96
1
1
1
Chaparral
0
0
0
0
0
0
Non-stocked
1,392
700
8
-138
-138
-138
Unused
0
0
0
0
0
0
TOTAL
21,910
22,571
23,231
132
132
132
 
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
566.3
599.6
626.3
6.65
5.35
6.00
Ponderosa pine
201.9
202.6
201.5
0.15
-0.22
-0.04
Western white pine
4.9
2.7
0.5
-0.44
-0.44
-0.44
Fir-spruce
196.5
313.7
428.8
23.42
23.02
23.22
Hemlock-Sitka spruce
17.9
23.4
28.7
1.11
1.06
1.08
Larch
90.2
79.7
68.3
-2.10
-2.28
-2.19
Lodgepole pine
362.1
371.4
376.1
1.85
0.94
1.40
Redwood
0.0
0.0
0.0
0.00
0.00
0.00
Other Hardwoods
32.0
48.3
48.6
3.26
0.06
1.66
Other forest types
183.2
133.2
83.0
-10.00
-10.03
-10.01
Pinyon-juniper
5.8
6.3
6.9
0.11
0.11
0.11
Chaparral
0.0
0.0
0.0
0.00
0.00
0.00
Non-stocked
91.0
46.4
0.7
-8.91
-9.15
-9.03
Unused
0.0
0.0
0.0
0.00
0.00
0.00
TOTAL
1,751.8
1,827.3
1,869.3
15.10
8.41
11.75
 
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
543.0
554.4
565.8
2.28
2.27
2.28
Forest floor and coarse woody debris
328.0
353.6
376.3
5.12
4.53
4.83
Soils
785.4
790.6
795.8
1.03
1.03
1.03
Wood products and landfills
95.3
128.6
131.5
6.67
0.56
3.62
TOTAL
1,751.8
1,827.3
1,869.3
15.10
8.41
11.75
 
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
1,092.8
1,137.4
1,179.0
8.93
8.31
8.62
Other Public
183.7
184.4
184.9
0.15
0.09
0.12
Forest Industry
160.2
157.8
150.0
-0.48
-1.57
-1.03
Other Private
315.1
347.6
355.4
6.50
1.57
4.04
TOTAL
1,751.8
1,827.3
1,869.3
15.10
8.41
11.75
 
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
0.4
3.4
0.09
0.60
0.34
Forest floor and coarse woody debris
0.0
-0.5
-1.0
-0.10
-0.10
-0.10
Soils
0.0
-0.5
-0.8
-0.09
-0.07
-0.08
Wood products and landfills
0.0
1.0
2.0
0.19
0.21
0.20
TOTAL
0.0
0.5
3.7
0.09
0.64
0.37

 


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