Table 1 Carbon stock estimates and net change in stocks for forest ecosystems of the conterminous U.S. between 2001 and 2020
Year | Change | |||
|---|---|---|---|---|
Stock | 2001 | 2020 | Tg C | Percent |
Aboveground live | ||||
Biomass: Foliage | 881.5 | 949.2 | 67.7 | 7.7 |
Biomass: Merchantable | 7859.7 | 9508.9 | 1649.2 | 21.0 |
Biomass: Other Wood | 4306.0 | 4842.6 | 536.6 | 12.5 |
Total | 13047.1 | 15300.7 | 2253.5 | 17.3 |
Belowground live | ||||
Biomass: Coarse Root | 2689.4 | 3107.0 | 417.6 | 15.5 |
Biomass: Fine Root | 464.6 | 482.3 | 17.7 | 3.8 |
Total | 3154.1 | 3589.3 | 435.3 | 13.8 |
Deadwood | ||||
DOM: Aboveground Medium | 1488.9 | 1219.4 | − 269.6 | − 18.1 |
DOM: Belowground Fast | 246.9 | 247.4 | 0.5 | 0.2 |
DOM: Snag Branch | 238.6 | 281.8 | 43.3 | 18.1 |
DOM: Snag Stem | 756.9 | 1028.2 | 271.3 | 35.8 |
Total | 2731.3 | 2776.8 | 45.5 | 1.7 |
Litter | ||||
DOM: Aboveground Fast | 1382.9 | 1369.6 | − 13.2 | − 1.0 |
DOM: Aboveground Very Fast | 856.0 | 904.2 | 48.2 | 5.6 |
Total | 2238.9 | 2273.9 | 35.0 | 1.6 |
Soil | ||||
DOM: Aboveground Slow | 7140.2 | 6871.6 | − 268.6 | − 3.8 |
DOM: Belowground Slow | 23572.1 | 23457.3 | − 114.8 | − 0.5 |
DOM: Belowground Very Fast | 143.3 | 143.5 | 0.2 | 0.2 |
Total | 30855.6 | 30472.4 | − 383.1 | − 1.2 |
All pools | ||||
Total | 52027.0 | 54413.1 | 2386.1 | 4.6 |