Sentences with phrase «of fire severity»
Modeling impacts of fire severity on successional trajectories and future fire behavior in Alaskan boreal forests
https://nca2014.globalchange.gov/ Not exact matches
The severity and the heat of the fire would mean it is an absolute miracle for anyone to be left alive.»
Steve Kean, the 43 - year - old who had no previous managerial experience at this level when he decided he would try his hand at management with Blackburn Rovers, already has the ignominy of knowing he has overseen the club's worst ever start to a Premier League season − any season since 1947/48 − and the severity of their forthcoming fixtures would suggest a reprieve isn't on its way any time soon for the under - fire Glaswegian.
For example, extreme droughts may reduce productivity due to water stress and increases in the frequency and severity of forest fires.
«In next 30 years, we're looking at pretty consistent disruption of current fire patterns for over half the planet — most of which involve increases» in severity, said lead author Max Moritz, a fire specialist based at UC Berkeley's College of Natural Resources.
As the research team saw while hiking through miles of dense brush, high - severity fires also stimulate shrub growth to the detriment of fire - resistant tree species that foresters try to encourage.
The researchers surveyed a range of elevations, forest types and fire severities - including in the Sierra Nevada, Klamath Mountains, and North Coast regions - to determine which factors promote and limit natural conifer regeneration and how different conifer species respond after a fire.
«High - severity fires are knocking out seed sources and leading to a natural regeneration bottleneck, which poses a predicament for the sustainability of our forests,» said lead author Kevin Welch, a research associate with the UC Davis Department of Plant Sciences.
«The confluence of climate and people in these areas increases the risk of widespread fire activity when the fire season severity is elevated,» said Doug Morton of NASA's Goddard Space Flight Center in Greenbelt, Md., who works with Randerson and colleagues on the forecast.
«We haven't seen much change in the severity of these fires, but they are getting bigger on average, which may be due to drought - driven shrub mortality.»
The lack of correlation between spruce beetle infestation and severe fire damage suggests that factors such as topography and weather conditions play a larger role in determining the severity of Colorado's subalpine wildfires.
«Over the past few decades, wildfire suppression costs have increased as fire seasons have grown longer and the frequency, size, and severity of wildfires has increased,» Jones said.
The findings track with the growing body of research on the impact of insects on forest fire severity, said Carolyn Sieg, a research plant ecologist with the U.S. Forest Service.
In the case of the western spruce budworm, a cream - colored insect that especially enjoys munching on conifers, the analysis showed in the first few years after an outbreak fire severity is low, but over the course of decades it increases.
For example, last year, a team of Colorado researchers found no correlation between beetles and fire severity in the case of high - elevation spruce and fir forests in southwestern Colorado (ClimateWire, Nov. 2, 2015).
For mountain pine beetles, the study found fire severity was high immediately after an outbreak, but over time as the number of trees killed by the beetle outbreak grew, fire severity leveled out.
«We found prescribed burns really reduced the severity of the Rim Fire,» said Alan Taylor, professor of geography and associate in the Earth and Environmental Systems Institute at Penn State.
However, the severity of that initial fire was the best predictor of how severe the next fire would be.
«You are probably getting a vegetation change due to that first fire that's going to cause more high - severity fires in the future and potentially the emergence of non-forest that could last for a long time.»
«Low severity burning seems to be very effective at limiting the severity of subsequent fires,» said Lucas Harris, a graduate student in geography and lead author on the paper.
«Controlled burns limited severity of Rim Fire.»
The fire severity forecast model, developed by Yang Chen and Jim Randerson at the University of California, Irvine, along with NASA scientists, was first published in 2011 in the journal Science.
And fire severity is already increasing in many forests due to climate change — what is now thought of as a drought in some locations may be considered average by the end of the next century.
Many fire scientists have tried to get Smokey the Bear to hang up his «prevention» motto in favor of tools like thinning and prescribed burns, which can manage the severity of wildfires while allowing them to play their natural role in certain ecosystems.
In other words, there is a large role that wildland management can play in limiting the severity of wildfires in western U.S. forests even as the climate warms and conditions become right for larger and potentially more severe fires.
This type of low severity fire could cover a lot of area without being too severe.
In addition, our fire weather season length metric captures variations in the number of days each year that fires are likely to burn, but it does not account for inter-annual variations in fire season severity.
Further work should consider both a lengthening fire season and an increase in within - season fire weather severity as causal mechanisms of burned area variations.
Modeling work by Schoennagel et al (2004) and Rocca et al (2014) for the Rocky Mountains projects changes in fire frequency (assumed by the authors to be related to the long - term increase in probability of fire occurrence) and severity in western Montana.
Combined with fuel loads, higher evapotranspiration rates and resulting shifts in water balance may be the best predictor of increased fire risk and fire severity in the future under a changing climate (Littell and Gwozdz 2011; Abatzoglou and Kolden 2013).
The phase of the Pacific Decadal Oscillation that leads to warmer conditions may also prolong and intensify the fire season (Heyerdahl et al. 2008; Jolly et al. 2015; Abatzoglou and Williams 2016), and it is clear that years with protracted or widespread wildland fire or increased fire severity are correlated with drought (Littell et al. 2009; van Mantgem et al. 2013).
Increased fire severity resulting primarily from warmer weather and past fire suppression; increased release of forest carbon from fire
An increase in fire risk (i.e., probability of occurrence)-- including an increase in size and possible frequency and / or severity (i.e., tree mortality)-- is expected in the coming century as a result of a) prolonged fire seasons due to increased temperatures, and b) increased fuel loads from past fire suppression.
In spite of this, Fire has the nerve to end with a statement about the severity of rainforest devastation, as if this afterthought of social conscience will make up for the misjudgments that have preceded it.
We have been very fortunate that despite the number and severity of some of fires, there have been few casualties and no recorded fatalities in school fires the UK.
By linking the fire, fire door and building alarms into a site - wide communications and safety system, fire marshals can be quickly deployed to the site of an alarm to assess its severity.
The presence of lithium batteries can also increase the severity of a fire originating from another source.
Renters insurance rates in California are probably high as a result of the frequency and severity of fires, bodily injury and property damage liability claims and water damage.
By Saturday evening, local volcanologists increased the severity of the eruption from phreatic (steam) to magmatic, after fire and lava were spotted near the summit.
Worldwide, vegetation fires are showing a trend toward longer burning periods, increased fire severity, larger areas burned and increased (mostly human caused) frequency — with all of these factors contributing to more damaging environmental impacts, higher shares of emissions and increasing socioeconomic costs, including greater threats to human health and security.
Finally, the severity and length of the recent drought [e.g. Nicholls 2006] and the associated fire danger has not been seen in the available records.»
The scale and severity of fires in the Southwest and Colorado are affected by a different mix than those, like the huge raging Rim Fire around and in Yosemite National Park, in the Sierras.
Further studies indicate that prescribed fire in these ecosystems, overall are less damaging, and certainly emit less than short - term high severity events which in the West, are very visible effects of a long - time fire exclusion approach.
As author and co-editor of a new fire book, «The Ecological Importance of Mixed - Severity Fires — Nature's Phoenix,» I would like to comment on Lindon's hypothesis that by «controlling» fire we can reduce climate change impacts.
Across south - eastern Australia, an elevation in the severity of weather conditions conducive to fire has been measured in recent decades.
As for the severity of burning, that is one thing that we can «control» fairly well by using prescribed fire only under the right seasonality (see early summer burning in e.g. South Africa or Australia), the right local weather conditions, and through the correct methodology / application.
The standards would tighten depending on level of hazard determined through a «fire exposure severity zoning system.»
It must be noted that the vast majority of fires are still human caused — supporting the notion that increased frequency and severity is likely very true.
For completed buildings, research shows that the size and severity of the majority of fires are related to the contents of a building and the living and working habits of its occupants.
Infrequent, large, high severity fires in these types of landscapes is not an ecological disaster, rather it is a continuation of an ancient process that most native species are well adapted to in those places.