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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

Colorado 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
11,739
11,647
11,555
-18
-18
-18
Other forest land
7,665
7,486
7,307
-36
-36
-36
Reserved timberland
1,933
2,170
2,407
47
47
47
TOTAL
21,338
21,304
21,270
-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
Douglas-fir
1,930
2,034
2,138
21
21
21
Ponderosa pine
2,369
2,487
2,604
24
24
24
Western white pine
0
0
0
0
0
0
Fir-spruce
4,432
4,349
4,267
-16
-16
-16
Hemlock-Sitka spruce
0
0
0
0
0
0
Larch
0
0
0
0
0
0
Lodgepole pine
2,219
2,216
2,213
-1
-1
-1
Redwood
0
0
0
0
0
0
Other Hardwoods
4,239
4,287
4,336
10
10
10
Other forest types
96
130
164
7
7
7
Pinyon-juniper
5,745
5,647
5,549
-20
-20
-20
Chaparral
0
0
0
0
0
0
Non-stocked
308
154
0
-31
-31
-31
Unused
0
0
0
0
0
0
TOTAL
21,338
21,304
21,270
-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
Douglas-fir
127.6
133.5
139.3
1.19
1.16
1.18
Ponderosa pine
136.7
142.6
148.3
1.18
1.14
1.16
Western white pine
0.0
0.0
0.0
0.00
0.00
0.00
Fir-spruce
374.7
369.9
364.6
-0.96
-1.06
-1.01
Hemlock-Sitka spruce
0.0
0.0
0.0
0.00
0.00
0.00
Larch
0.0
0.0
0.0
0.00
0.00
0.00
Lodgepole pine
139.3
142.0
144.5
0.54
0.50
0.52
Redwood
0.0
0.0
0.0
0.00
0.00
0.00
Other Hardwoods
276.7
283.0
289.2
1.28
1.23
1.25
Other forest types
6.6
9.0
11.6
0.48
0.52
0.50
Pinyon-juniper
412.8
403.5
394.3
-1.86
-1.84
-1.85
Chaparral
0.0
0.0
0.0
0.00
0.00
0.00
Non-stocked
14.0
7.0
0.0
-1.40
-1.39
-1.40
Unused
0.0
0.0
0.0
0.00
0.00
0.00
TOTAL
1,488.3
1,490.5
1,491.8
0.45
0.25
0.35
 
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
380.7
386.0
391.4
1.07
1.07
1.07
Forest floor and coarse woody debris
414.9
409.9
405.0
-1.00
-0.97
-0.99
Soils
686.9
687.2
687.4
0.05
0.05
0.05
Wood products and landfills
5.8
7.5
8.0
0.34
0.10
0.22
TOTAL
1,488.3
1,490.5
1,491.8
0.45
0.25
0.35
 
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
726.9
734.7
741.5
1.56
1.36
1.46
Other Public
360.5
357.9
355.3
-0.52
-0.54
-0.53
Forest Industry
0.0
0.0
0.0
0.00
0.00
0.00
Other Private
400.8
397.9
395.0
-0.59
-0.57
-0.58
TOTAL
1,488.3
1,490.5
1,491.8
0.45
0.25
0.35
 
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
-0.3
-0.6
-0.06
-0.06
-0.06
Forest floor and coarse woody debris
0.0
-0.3
-0.6
-0.06
-0.06
-0.06
Soils
0.0
-0.3
-0.6
-0.06
-0.06
-0.06
Wood products and landfills
0.0
0.0
0.0
0.00
0.00
0.00
TOTAL
0.0
-0.9
-1.8
-0.18
-0.18
-0.18

 


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