Table 2 Weibull parameters for area burned by fires >40 ha in Yosemite between 1984 and 2009. The data illustrated in Figure 3 were fit to a curve of the form: \(y = 1 - {e^{ - {{\left( {{{x - {x_0} + b\ln {2^{{1 \over c}}}} \over b}} \right)}^c}}}\) All P values < 0.001.
From: Fire Frequency, Area Burned, and Severity: A Quantitative Approach to Defining a Normal Fire Year
Year | b | c | X 0 |
|---|---|---|---|
1984 | 118.7810 | 1.0810 | 54.2297 |
1985 | 146.1845 | 0.8969 | 75.6685 |
1986 | 153.8405 | 0.9766 | 92.2235 |
1987 | 387.9411 | 1.4239 | 243.9727 |
1988 | 200.7272 | 1.0391 | 97.7872 |
1989 | 67.3086 | 1.0719 | 9.5990 |
1990 | 416.7735 | 1.4848 | 253.9185 |
1991 | 227.3193 | 1.1967 | 135.0312 |
1992 | 123.2930 | 0.9445 | 52.3423 |
1993 | 123.8919 | 1.6866 | 74.1267 |
1994 | 168.1034 | 1.2922 | 59.4338 |
1995 | 193.2867 | 1.0225 | 94.6221 |
1996 | 291.1345 | 1.1743 | 212.7715 |
1997 | 211.6579 | 1.3631 | 131.3029 |
1998 | 138.9025 | 1.6552 | 75.9263 |
1999 | 220.8271 | 1.3292 | 121.1346 |
2000 | 83.7842 | 1.5352 | 1.5352 |
2001 | 186.6766 | 1.0194 | 140.9227 |
2002 | 137.7264 | 1.4858 | 90.4649 |
2003 | 282.6585 | 1.3200 | 187.2860 |
2004 | 293.9449 | 1.2722 | 153.6713 |
2005 | 161.8939 | 1.3377 | 111.8003 |
2006 | 205.0641 | 1.6230 | 123.5403 |
2007 | 123.0021 | 1.2231 | 75.7596 |
2008 | 238.3653 | 1.5045 | 160.7112 |
2009 | 305.4238 | 1.4179 | 165.9796 |
All pixels† | 262.1238 | 1.1511 | 160.3395 |
All years‡ | 185.5725 | 1.0499 | 101.7855 |