Press release today from Oregon State University. The first few paragraphs:
As more of the Pacific Northwest burns, severe fires change forest ecology
CORVALLIS, Ore. — Over the last 30 years, the landscape annually affected by forest fires has slowly increased across the Pacific Northwest, and in some regions, severe blazes account for a higher proportion of the area burned than in the past.
As a result, the ecology of some of the region’s forests is changing in unprecedented ways.
Scientists calculated that less than one-half of 1 percent of the region’s forest is subject to fire in any given year. But in a project using satellite imagery and ground-based tree inventories, they also found that, in areas historically dominated by low- and mixed-severity fires, nearly a quarter of the burned landscape was subject to patches of high-severity fires that often exceeded 250 acres in size.
Studies of fires prior to 1900 suggest that severe fires occurred over smaller patches of forest and accounted for a much smaller proportion of the total burned area than they do today.
….
Sadly, Oregon State did not provide a link to the actual study.
This result seems to conflict with other studies reporting no significant trend in area burned, number of fires, or fire severity for the state of Oregon. Law, B.E., Waring, R.H. 2015. Review and synthesis – Carbon implications of current and future effects of drought, fire and management on Pacific Northwest forests. Forest Ecology and Management 355 (2015) 4–14. http://terraweb.forestry.oregonstate.edu/pubs/law.fmec.2015.pdf
and …
Ray Davis et al (2015) –
Ray Davis et al 2015. RMP Revisions for Western Oregon BLM DEIS. Appendix D – Modeling Wildfires and Fire Severity. http://www.blm.gov/or/plans/rmpswesternoregon/files/draft/RMP_EIS_Volume3_appd.pdf
2nd law, get out and visit some of the burnt forests and you might think differently.
I believe that the increase in acreage can be directly linked to the Forest Service fire policies and increased “fire fighting” budget.
I’m going to go out on a limb here and state with a high level of confidence that 2nd law has, in fact, gotten out a bunch to visit some forests, burnt or otherwise.
Of course, pretending that historical fire suppression has had no impact on acres-burned or fire intensity is…. unfortunate. Today’s studies always seem to exclude human occupation and impacts. Yep, significant science is hard to do! Going back to a pre-human landscape is not…. ahem…. desirable (or even possible) in a human-dominated world.