Table 1 Treatment, year, ignition date, weather conditions, and flame lengths for prescribed burns from 1997 through 2014 for the season and frequency of burn study in the Blue Mountain Ecoregion, Oregon, USA.
From: Long-Term Effects of Burn Season and Frequency on Ponderosa Pine Forest Fuels and Seedlings
Treatment | Year | Ignition date | Temperature range (°C) | Relative humidity (%) | Wind speed (km hr−1) | Flame length (m) |
|---|---|---|---|---|---|---|
Initial fall burn | 1997 | 30 Sep, 16 Oct | 13.9 to 20.6 | 24 to 40 | 0.0 to 8.0 | 0.0 to 1.5 |
Initial spring burn | 1998 | 17 Jun | 15.5 to 21.7 | 12 to 44 | 3.2 to 8.0 | 0.6 to 1.5 |
Fall reburn 1 | 2002 | 8, 9 Oct | 10.5 to 18.3 | 17 to 44 | 0.0 to 11.3 | 0.3 to 0.9 |
Spring reburn 1 | 2003 | 22 May | 21.1 to 23.3 | 30 to 32 | 0.0 to 9.7 | 0.3 to 0.6 |
Fall reburn 2 | 2007 | 13, 15 Oct | 10.0 to 16.1 | 32 to 54 | 0.0 to 3.2 | 0.0 to 0.9 |
Spring reburn 2 | 2008 | 19 May, 14 Jun | 23.9 to 30.0 | 19 to 30 | 0.0 to 8.0 | 0.3 to 1.2 |
Fall reburn 3a (5 yr) Fall reburn 1a (15 yr) | 2012 | 18 Oct | 16.1 to 16.7 | 22 to 25 | 1.6 to 6.4 | 0.2 to 0.6 |
Spring reburn 3a (5 yr) Spring reburn 1 a (15 yr) | 2013 | 3, 7 May | 15.6 to 25.6 | 21 to 33 | 0.0 to 8.0 | 0.2 to 0.6 |
Fall reburn 3b (5 yr) Fall reburn 1b (15 yr) | 2013 | 22, 24 Oct | 15.0 to 18.9 | 26 to 41 | 0.0 to 4.8 | 0.2 to 0.6 |
Spring reburn 3b (5 yr) Spring reburn 1b (15 yr) | 2014 | 14 May | 19.4 to 22.2 | 19 to 24 | 1.6 to 8.0 | 0.3 to 0.9 |