Northern Global Change Research Program

The Potential of U.S. Forest Soils to Sequester Carbon and Mitigate the Greenhouse Effect

English Unit Data

Table 1	Table 2
Table 2a	Table 3
Table 4	Table 4a
Table 5	Table 6
Table 6a	Table 7
Table 8	Table 9
Table 9a	Table 9b
Table 10	Table 11
Table 12	Table 13
Table 14	Table 15
Table 16	Table 17
Table 18	Table 18a
Table 19	Table 2 0
Table 21	Table 22
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Chapter 2: Current and Historical Trends in Use, Management and Disturbance of United States Forest Lands-English Unit Data
by Richard A. Birdsey & George M. Lewis

Table 14. Area of old timberland in the Western U.S., by region and forest type, 1997¹.

	Rocky Mts.	Pacific Coast	Alaska	Total West
	(Thousand ac)
Forest Type
Douglas Fir	6,588.0	5,640.0	0.0	12,228.0
Ponderosa Pine	3,770.0	5,749.0	0.0	9,519.0
Western White Pine	0.0	98.0	0.0	98.0
Fir-Spruce	6,866.0	2,320.0	1,020.0	10,206.0
Hemlock-Sitka Spruce	400.0	1,670.0	4,175.0	6,245.0
Larch	189.0	85.0	0.0	274.0
Lodgepole Pine	3,601.0	780.0	0.0	4,381.0
Redwood	0.0	113.0	0.0	113.0
Other hardwoods	757.0	884.0	41.0	1,682.0
Other Forest Types	826.0	1,211.0	708.0	2,745.0
Pinyon-Juniper	211.0	96.0	0.0	307.0
Chaparral	0.0	0.0	0.0	0.0
Nonstocked	0.0	19.0	47.0	66.0
Total	23,208.0	18,665.0	5,991.0	47,864.0
¹From Smith et al. 2001. Old timberland includes areas with an age of 100 years and greater.
Uneven-aged forest land is excluded.

Users of these tables are kindly requested to cite their source:
Birdsey, Richard A.; Lewis, George M. 2002. Current and Historical Trends in Use,
Management and Disturbance of United States Forest Lands. IN: Kimble, John et al. (eds.),
The Potential of U.S. Forest Soils to Sequester Carbon and Mitigate the Greenhouse Effect.
Boca Raton, Florida: CRC Press. XXX p.

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