Table 6 Confidence intervals for the 100-year average carbon stored in HWP for selected years using the California Forest Project Protocol. Means and confidence intervals were calculated using Monte Carlo simulation.
Inventory year | Simulation Mean (MgC) | 90% Confidence interval | |
|---|---|---|---|
| Â | Â | 5% (MgC) | 95% (MgC) |
1910 | 73,654 | 41,230 | 117,343 |
1920 | 93,830 | 52,524 | 149,486 |
1930 | 75,929 | 42,504 | 120,967 |
1940 | 102,538 | 57,399 | 163,360 |
1950 | 181,181 | 113,537 | 270,498 |
1960 | 628,840 | 394,062 | 938,842 |
1970 | 898,820 | 563,303 | 1,336,731 |
1980 | 503,370 | 382,408 | 653,254 |
1990 | 613,729 | 463,510 | 803,920 |
1995 | 207,441 | 159,195 | 268,110 |
2000 | 143,439 | 108,755 | 186,617 |
2005 | 140,321 | 107,692 | 179,018 |
2006 | 91,865 | 70,445 | 116,970 |
2007 | 87,791 | 67,609 | 112,596 |
2008 | 84,825 | 66,493 | 106,480 |
2009 | 91,998 | 71,596 | 115,991 |