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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

Massachusetts 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
3,010
2,988
2,965
-4
-4
-4
Other forest land
87
118
150
6
6
6
Reserved timberland
0
74
149
15
15
15
TOTAL
3,097
3,180
3,264
17
17
17
 
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
733
708
683
-5
-5
-5
Spruce-fir
43
35
28
-1
-1
-1
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)
112
128
144
3
3
3
Oak-pine
281
299
317
4
4
4
Oak-hickory
953
971
989
4
4
4
Oak-gum-cypress
9
13
16
1
1
1
Elm-ash-cottonwood
215
192
169
-5
-5
-5
Maple-beech-birch
702
771
841
14
14
14
Aspen-birch
35
30
25
-1
-1
-1
Other forest types
0
0
0
0
0
0
Non-stocked
14
33
52
4
4
4
TOTAL
3,097
3,180
3,264
17
17
17
 
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
77.0
74.5
72.0
-0.50
-0.49
-0.50
Spruce-fir
4.0
3.3
2.6
-0.14
-0.14
-0.14
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)
5.9
6.9
7.8
0.19
0.19
0.19
Oak-pine
18.5
19.5
20.5
0.20
0.20
0.20
Oak-hickory
74.8
77.1
79.4
0.46
0.46
0.46
Oak-gum-cypress
0.6
0.8
1.0
0.04
0.04
0.04
Elm-ash-cottonwood
12.4
11.3
10.1
-0.22
-0.24
-0.23
Maple-beech-birch
72.2
79.4
86.6
1.44
1.44
1.44
Aspen-birch
2.6
2.2
1.9
-0.06
-0.06
-0.06
Other forest types
2.9
3.7
4.7
0.17
0.19
0.18
Non-stocked
0.9
2.5
4.1
0.32
0.32
0.32
TOTAL
271.7
281.2
290.7
1.89
1.91
1.90
 
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
79.2
83.6
88.0
0.87
0.87
0.87
Forest floor and coarse woody debris
25.8
26.7
27.7
0.19
0.19
0.19
Soils
163.9
167.2
170.4
0.66
0.65
0.66
Wood products and landfills
2.9
3.7
4.7
0.17
0.19
0.18
TOTAL
271.7
281.2
290.7
1.89
1.91
1.90
 
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
0.0
0.0
0.0
0.00
0.00
0.00
Other Public
43.9
51.9
59.5
1.60
1.53
1.57
Forest Industry
7.9
7.7
7.2
-0.05
-0.11
-0.08
Other Private
219.9
221.6
224.0
0.33
0.48
0.41
TOTAL
271.7
281.2
290.7
1.89
1.91
1.90
 
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
-0.5
-0.7
-0.10
-0.05
-0.07
Forest floor and coarse woody debris
0.0
-0.3
-0.5
-0.05
-0.05
-0.05
Soils
0.0
-0.6
-1.2
-0.13
-0.12
-0.12
Wood products and landfills
0.0
0.0
0.0
0.00
0.00
0.00
TOTAL
0.0
-1.4
-2.5
-0.28
-0.22
-0.25

 


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