Region | Age class | Mean C density (tC/ha) | SEM | Forest area (kha) | % of area (forestland) |
---|---|---|---|---|---|
Northeast | 0–20 | 15.5 | 0.8 | 1,361 | 4 |
21–40 | 34.8 | 0.6 | 3,513 | 10 | |
41–60 | 59 | 0.6 | 6,437 | 19 | |
61–80 | 77.1 | 0.5 | 10,445 | 31 | |
81–120 | 88.4 | 0.5 | 11,464 | 34 | |
121+ | 88.6 | 2.1 | 783 | 2 | |
Overall | 70.9 | 0.3 | |||
Northern Lake States | 0–20 | 11.5 | 0.3 | 2,704 | 12 |
21–40 | 29.1 | 0.4 | 3,219 | 15 | |
41–60 | 42 | 0.5 | 4,576 | 21 | |
61–80 | 52.4 | 0.4 | 5,977 | 27 | |
81–120 | 60.6 | 0.5 | 5,167 | 23 | |
121+ | 58 | 1.9 | 535 | 2 | |
Overall | 43.9 | 0.2 | |||
South Central | 0–20 | 22.4 | 0.3 | 14,935 | 27 |
21–40 | 54.1 | 0.4 | 13,040 | 23 | |
41–60 | 61.8 | 0.4 | 12,060 | 22 | |
61–80 | 74.3 | 0.5 | 11,994 | 21 | |
81–120 | 85 | 1 | 3,723 | 7 | |
121+ | 92.5 | 8.5 | 47 | < 1 | |
Overall | 53.7 | 0.2 | |||
Southeast | 0–20 | 22.1 | 0.3 | 10,075 | 28 |
21–40 | 57.4 | 0.5 | 9,325 | 26 | |
41–60 | 69 | 0.7 | 5,911 | 16 | |
61–80 | 85.9 | 0.7 | 5,931 | 16 | |
81–120 | 97.4 | 0.9 | 4,525 | 13 | |
121+ | 99.2 | 3.2 | 295 | 1 | |
Overall | 59.5 | 0.3 | |||
Central States | 0–20 | 14.1 | 0.9 | 697 | 5 |
21–40 | 36.9 | 0.8 | 1,473 | 10 | |
41–60 | 54.4 | 0.6 | 3,881 | 27 | |
61–80 | 63.1 | 0.6 | 4,769 | 33 | |
81–120 | 70.9 | 0.8 | 3,350 | 23 | |
121+ | 76.7 | 3.6 | 258 | 2 | |
Overall | 57.7 | 0.4 | |||
Great Plains | 0–20 | 2.1 | 0.1 | 10,789 | 22 |
21–40 | 8.4 | 0.1 | 13,554 | 28 | |
41–60 | 14.2 | 0.2 | 14,562 | 30 | |
61–80 | 21.8 | 0.4 | 7,135 | 15 | |
81–120 | 27.2 | 0.8 | 1,930 | 4 | |
121–160 | 25.2 | 2.5 | 176 | < 1 | |
161–300 | 37.7 | 8.7 | 33 | < 1 | |
300+ | 3.4 | – | 6 | < 1 | |
Overall | 11.6 | 0.1 | |||
Rocky Mountain-North | 0–20 | 5.5 | 0.2 | 4,511 | 23 |
21–40 | 15.5 | 0.5 | 1,231 | 6 | |
41–60 | 30.4 | 1 | 1,219 | 6 | |
61–80 | 47.4 | 1.4 | 2,016 | 10 | |
81–120 | 56.7 | 0.9 | 5,386 | 28 | |
121–160 | 58.6 | 1.2 | 2,762 | 14 | |
161–300 | 61.8 | 1.4 | 1,988 | 10 | |
300+ | 47.9 | 4.1 | 141 | 1 | |
Overall | 40.2 | 0.4 | |||
Rocky Mountain-South | 0–20 | 3.8 | 0.1 | 6,456 | 15 |
21–40 | 7.4 | 0.3 | 1,860 | 4 | |
41–60 | 10.1 | 0.5 | 1,626 | 4 | |
61–80 | 17.2 | 0.5 | 3,538 | 8 | |
81–120 | 26.8 | 0.4 | 11,268 | 26 | |
121–160 | 25.6 | 0.4 | 8,114 | 19 | |
161–300 | 23.8 | 0.4 | 9,139 | 21 | |
300+ | 22.6 | 1.4 | 543 | 1 | |
Overall | 20.1 | 0.2 | |||
Pacific Northwest - East | 0–20 | 5.4 | 0.3 | 1,161 | 12 |
21–40 | 20.7 | 0.6 | 816 | 8 | |
41–60 | 32.1 | 1.2 | 978 | 10 | |
61–80 | 41.9 | 1 | 1,743 | 18 | |
81–120 | 54.6 | 1 | 3,223 | 33 | |
121–160 | 69 | 2.1 | 1,005 | 10 | |
161–300 | 85.9 | 3.1 | 804 | 8 | |
300+ | 92 | 10.1 | 147 | 1 | |
Overall | 46.1 | 0.6 | |||
Pacific Northwest - West | 0–20 | 17.3 | 0.8 | 2,032 | 18 |
21–40 | 84.4 | 1.4 | 2,528 | 23 | |
41–60 | 135.1 | 2.5 | 1,661 | 15 | |
61–80 | 157.5 | 3.8 | 1,114 | 10 | |
81–120 | 176.7 | 4 | 1,288 | 12 | |
121–160 | 212.5 | 5.8 | 704 | 6 | |
161–300 | 234.2 | 4.2 | 1,099 | 10 | |
300+ | 248.9 | 7 | 610 | 6 | |
Overall | 130.0 | 1.2 | |||
Pacific Southwest | 0–20 | 8.1 | 0.8 | 991 | 8 |
21–40 | 49.8 | 2.8 | 689 | 5 | |
41–60 | 84.7 | 3.1 | 1,217 | 9 | |
61–80 | 77.1 | 2.5 | 1,625 | 13 | |
81–120 | 91.4 | 2 | 3,043 | 24 | |
121–160 | 110.7 | 3.8 | 1,273 | 10 | |
161–300 | 117.9 | 3.9 | 1,397 | 11 | |
300+ | 49.2 | 2.9 | 2,584 | 20 | |
Overall | 76.6 | 1 |