USDA Forest ServiceSkip navigational links  
Northern Global Change Research Program

Regional Estimates:

Go to:Great Plains Region

Go to:North Central Region

Go to:Northeast Region

Viewing:Pacific Coast Region

Go to:Rocky Mountain Region

Go to:South Central Region

Go to:Southeast Region

Finished:Close Window

EPA Logo
 
Norhtern Global Change Research Program Logo
United States Department of Agriculture Forest Service. USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.
 

Publications & Products

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

Pacific Coast Region (AK, CA, HI, OR, WA) 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
73,490
72,852
72,214
-128
-128
-128
Other forest land
129,618
127,357
125,096
-452
-452
-452
Reserved timberland
18,361
20,169
21,977
362
362
362
TOTAL
221,468
220,378
219,287
-218
-218
-218
 
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
23,831
22,369
20,907
-292
-292
-292
Ponderosa pine
14,265
14,753
15,241
98
98
98
Western white pine
20
238
457
44
44
44
Fir-spruce
54,974
52,661
50,349
-463
-463
-463
Hemlock-Sitka spruce
17,298
18,569
19,839
254
254
254
Larch
943
643
342
-60
-60
-60
Lodgepole pine
3,537
3,387
3,237
-30
-30
-30
Redwood
1,276
1,096
916
-36
-36
-36
Other Hardwoods
26,022
25,885
25,749
-27
-27
-27
Other forest types
64,834
67,607
70,381
555
555
555
Pinyon-juniper
4,499
4,338
4,177
-32
-32
-32
Chaparral
8,041
6,551
5,061
-298
-298
-298
Non-stocked
1,928
2,279
2,630
70
70
70
TOTAL
221,468
220,378
219,287
-218
-218
-218
 
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
2,853.3
2,724.3
2,570.8
-25.81
-30.68
-28.25
Ponderosa pine
1,164.4
1,248.5
1,333.3
16.83
16.95
16.89
Western white pine
1.7
19.8
37.9
3.60
3.62
3.61
Fir-spruce
4,753.8
4,544.0
4,327.2
-41.95
-43.36
-42.65
Hemlock-Sitka spruce
1,605.5
1,742.5
1,884.9
27.40
28.49
27.94
Larch
91.0
64.8
35.0
-5.23
-5.96
-5.59
Lodgepole pine
246.4
235.9
224.8
-2.10
-2.22
-2.16
Redwood
177.0
158.5
137.9
-3.69
-4.13
-3.91
Other Hardwoods
1,746.1
1,789.0
1,835.9
8.56
9.39
8.97
Other forest types
5,101.2
5,359.3
5,617.8
51.62
51.69
51.66
Pinyon-juniper
332.9
314.6
296.7
-3.67
-3.58
-3.62
Chaparral
608.3
495.5
382.7
-22.55
-22.55
-22.55
Non-stocked
146.8
166.8
186.7
4.00
3.99
3.99
TOTAL
18,828.5
18,863.5
18,871.7
7.01
1.64
4.32
 
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
4,891.1
4,923.7
4,956.6
6.5
6.6
6.5
Forest floor and coarse woody debris
4,501.4
4,457.6
4,415.2
-8.8
-8.5
-8.6
Soils
8,743.6
8,731.2
8,719.1
-2.5
-2.4
-2.5
Wood products and landfills
692.3
751.0
780.8
11.7
5.9
8.8
TOTAL
18,828.5
18,863.5
18,871.7
7.0
1.6
4.3
 
Table 5. Total carbon stock on forest land and annual change by owner (MMTC).
Accounting component
1987
1992
1997
Average Annual Change
 
1987-1992
1992-1997
1987-1997
Biomass
4,706.1
4,766.9
4,809.5
12.2
8.5
10.3
Forest floor and coarse woody debris
7,586.1
7,628.5
7,666.3
8.5
7.6
8.0
Soils
1,451.2
1,446.5
1,434.1
-0.9
-2.5
-1.7
Wood products and landfills
5,085.0
5,021.6
4,961.9
-12.7
-11.9
-12.3
TOTAL
18,828.5
18,863.5
18,871.7
7.0
1.6
4.3
 
Table 6. Change in total carbon stock on forest land attributed to land use change (MMTC).
Owner group
1987
1992
1997
Average Annual Change
 
1987-1992
1992-1997
1987-1997
National Forest
0.0
-22.6
-42.7
-4.5
-4.0
-4.3
Other Public
0.0
-15.2
-30.2
-3.0
-3.0
-3.0
Forest Industry
0.0
-17.2
-33.3
-3.4
-3.2
-3.3
Other Private
0.0
9.5
20.5
1.9
2.2
2.1
TOTAL
0.0
-45.5
-85.7
-9.1
-8.0
-8.6

 


Page Contact: Kevin McCullough