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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

Maryland 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
2,461
2,442
2,423
-4
-4
-4
Other forest land
18
71
124
11
11
11
Reserved timberland
153
153
153
0
0
0
TOTAL
2,632
2,666
2,701
7
7
7
 
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
53
54
54
0
0
0
Spruce-fir
0
0
0
0
0
0
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)
322
314
305
-2
-2
-2
Oak-pine
285
281
277
-1
-1
-1
Oak-hickory
1,621
1,665
1,709
9
9
9
Oak-gum-cypress
126
128
130
0
0
0
Elm-ash-cottonwood
82
80
77
-1
-1
-1
Maple-beech-birch
143
146
149
1
1
1
Aspen-birch
0
0
0
0
0
0
Other forest types
0
0
0
0
0
0
Non-stocked
0
0
0
0
0
0
TOTAL
2,632
2,666
2,701
7
7
7
 
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
5.3
5.3
5.4
0.01
0.01
0.01
Spruce-fir
0.0
0.0
0.0
0.00
0.00
0.00
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
-0.3
-0.6
-0.06
-0.06
-0.06
Loblolly-shortleaf pine (natural)
21.7
20.9
20.0
-0.17
-0.17
-0.17
Oak-pine
20.9
21.0
21.2
0.03
0.03
0.03
Oak-hickory
159.6
165.3
171.0
1.12
1.15
1.14
Oak-gum-cypress
9.3
9.5
9.8
0.05
0.05
0.05
Elm-ash-cottonwood
6.5
6.0
5.6
-0.10
-0.09
-0.09
Maple-beech-birch
15.2
15.4
15.7
0.05
0.05
0.05
Aspen-birch
0.0
0.0
0.0
0.00
0.00
0.00
Other forest types
11.6
12.2
12.7
0.11
0.10
0.11
Non-stocked
0.0
0.0
0.0
0.00
0.00
0.00
TOTAL
250.1
255.3
260.7
1.05
1.07
1.06
 
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
88.0
90.4
92.8
0.47
0.48
0.47
Forest floor and coarse woody debris
18.9
19.4
20.0
0.11
0.11
0.11
Soils
113.5
114.8
116.1
0.26
0.26
0.26
Wood products and landfills
29.7
30.7
31.8
0.20
0.22
0.21
TOTAL
250.1
255.3
260.7
1.05
1.07
1.06
 
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
37.5
37.8
38.1
0.06
0.05
0.05
Forest Industry
10.2
10.9
11.2
0.14
0.06
0.10
Other Private
202.4
206.6
211.4
0.85
0.96
0.91
TOTAL
250.1
255.3
260.7
1.05
1.07
1.06
 
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
-1.1
-1.9
-0.23
-0.15
-0.19
Forest floor and coarse woody debris
0.0
-0.3
-0.6
-0.06
-0.06
-0.06
Soils
0.0
-0.8
-1.6
-0.16
-0.15
-0.16
Wood products and landfills
0.0
0.5
1.0
0.10
0.10
0.10
TOTAL
0.0
-1.7
-3.0
-0.34
-0.26
-0.30

 


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