Table 2.9 - Average and total storage of carbon in live trees on timberland in the Rocky Mountains, by forest type and productivity class, 1987
Volume of
growing stock
Volume of
solid wood
Forest type and
productivity class
Area of timberland Softwood Hardwood Softwood Hardwood Average carbon storage in trees Total carbon storage in trees
(1,000 ac) (1,000,000 cu ft) (1,000,000 cu ft) (Lbs/ac) (1,000 metric tons)
Douglas-fir
85+ 2,904 7,386 69 14,909 163 78,157 102,954
50 to 85 5,619 11,355 210 24,240 416 65,993 168,201
20 to 50 4,779 6,314 70 13,204 137 42,045 91,142
Total 13,304 25,057 350 52,357 718 60,043 362,337
Ponderosa pine
85+ 769 1,732 11 3,339 22 58,032 20,245
50 to 85 1,951 3,061 26 6,236 62 42,860 37,930
20 to 50 10,995 10,507 120 21,754 273 26,588 132,601
Total 13,715 15,302 159 31,333 362 30,674 190,825
Western white pine
85 + 240 892 2 1,718 4 86,297 9,400
50 to 85 16 36 0 70 0 51,965 381
20 to 50 4 1 1 2 2 10,678 21
Total 260 929 2 1,790 4 82,974 9,791
Fir-spruce
85 + 2,899 8,304 159 16,267 306 63,807 83,904
50 to 85 5,046 11,763 592 23,384 1,311 54,727 125,261
20 to 50 3,063 5,536 115 10,930 240 40,708 56,558
Total 11,010 25,603 866 50,581 1,855 53,207 265,718
Hemlock-Sitka spruce
85 + 1,243 3,992 19 7,555 38 84,574 47,690
50 to 85 226 625 0 1,230 0 75,345 7,729
20 to 50 19 39 0 82 0 58,969 512
Total 1,488 4,656 20 8,867 40 82,882 55,943
Larch
85 + 1,212 3,595 12 7,204 24 96,726 53,178
50 to 85 506 1,133 1 2,483 2 79,674 18,289
20 to 50 31 42 0 86 0 44,933 633
Total 1,749 4,771 13 9,774 26 90,896 72,113
Lodgepole pine
85 + 1,276 3,177 36 6,759 71 72,148 41,765
50 to 85 2,983 7,310 39 15,882 79 72,178 97,666
20 to 50 5,137 9,465 64 19,341 131 51,121 119,117
Total 9,396 19,952 140 41,982 284 60,666 258,559
Redwood
85 + 0 0 0 0 0 0 0
50 to 85 0 0 0 0 0 0 0
20 to 50 0 0 0 0 0 0 0
Total 0 0 0 0 0 0 0
Other softwood types
85 + 60 141 4 327 8 75,871 2,051
50 to 85 72 117 0 237 0 44,274 1,454
20 to 50 170 263 0 520 0 41,394 3,192
Total 301 521 4 1,083 8 49,051 6,697
Western hardwood types
85 + 285 201 349 394 693 47,599 6,156
50 to 85 1,656 648 1,711 1,262 3,390 34,627 26,010
20 to 50 2,872 587 2,583 1,148 5,111 26,540 34,575
Total 4,810 1,439 4,643 2,810 9,195 30,607 66,777
Non-stocked timberland
85 + 293 28 5 56 11 3,023 402
50 to 85 358 45 6 89 12 3,779 614
20 to 50 926 88 6 188 15 2,944 1,237
Total 1,576 159 18 330 40 3,134 2,240
All timberland
85 + 11,184 29,451 669 58,534 1,345 72,491 367,746
50 to 85 18,435 36,095 2,584 75,117 5,271 57,825 483,533
20 to 50 27,993 32,843 2,961 67,255 5,913 34,620 439,587
Total 57,609 98,389 6,214 200,907 12,530 49,405 1,291,001