Fire weather Of course, gathering data about the way fires interact with the atmosphere poses some logistical challenges. That would destroy the tools. The fire had been traveling fairly slowly, but then raced 25 kilometers up a canyon in just 11 hours with puzzling ferocity — a nearby weather station had recorded calm winds at the time.
Differences in atmospheric pressure create wind — air moving from higher pressure areas to lower pressure areas. When the fire warmed the air in the canyon, it lowered the air pressure and made the air expand and rise, creating winds far stronger than official measurements taken nearby. Such flaming whirlwinds form when rising air heated by a wildfire collides with turbulent ambient air.
That suggests that, given limited resources, brush-clearing efforts might be most useful for slowing fire spread when focused more on hilly terrain than on flatlands.
How fires behave at this wildland—urban interface is poorly understood compared with fires within buildings or on open land, says Mell, the Forest Service combustion scientist.
The destruction came entirely from firebrands — chunks of burning vegetation or debris — that swept in on strong winds. Firebrands can pile up and ignite buildings, which can then generate their own firebrands. To tease out these interactions, Mell, like Coen, incorporates the physics of fire. But the focus is at finer resolution — on the way that fires burn on the scale of meters, rather than the way they influence air movement over kilometers.
The larger goal with such models: A more rigorous evaluation of ember hazards so that fire-prone communities can be designed and managed as safely as possible. These wildland—urban interface models depend on data from lab experiments that test how embers fly and burn. Their density is constantly changing, which affects how they move through the air. Firebrands from torched vegetation behave differently than those from burning buildings.
Embers land on the roofs and burn until small enough to fit through cracks between the tiles. Now, he says, wildland-urban interface safety standards have been updated: tile roofs should have combustion-proof materials underneath or materials that plug the gaps between them. Questions or comments on this article?
Citations J. Coen, E. Stavros and J. Deconstructing the King megafire. Ecological Applications. Roughly one in 10 people in Townsville are unemployed. People want economic growth and employment opportunities. And, for all the boom and bust cycles places such as Townsville have endured in the past, the mining industry still posits itself as a jobs saviour.
People want to see jobs in mining, they want to see Adani go ahead. Part of the challenge of communicating climate change is explaining the science, particularly the extent to which any extreme event can be linked to increasing emissions. Attribution science is a rapidly evolving field.
Lesley Hughes, who helped launch a Climate Council report called Weather Gone Wild, says emissions are effectively loading the dice to increase the likelihood of an extreme weather event.
Snowmelt and intense rains—eight times as much rainfall as usual in parts of the Mississippi River watershed—triggered floods that caused three to four billion dollars in damages. Hughes says governments can obfuscate for only so long before publicly accepting that climate change is now both a mitigation and adaptation challenge. New evidence suggests that warming is altering the polar jet stream, adding lazy north-south meanders to its path around the planet—which might help to explain why North America was so warm last winter and Europe so cold. Living in West Texas is not for the weak at heart.
As of September 5, fires had torched almost 30, square kilometers nationwide, an area larger than Massachusetts. Citations J. Given how little rain we had, we probably would have had record warmth in Texas in even without climate change. Scientists expect the weather to change substantially.
The whole state suffered, but West Texas was already close to the edge. Chief Minister Michael Gunner has told schools and businesses in the Greater Darwin area to remain closed today Monday , as power and water companies work to get electricity and water supplies back to homes and businesses. Why do Darwin residents have to boil water for the next few days?
And, for all the boom and bust cycles places such as Townsville have endured in the past, the mining industry still posits itself as a jobs saviour. Questions or comments on this article? All across the region farmers, ranchers, and municipalities were feeling the damage. Heat and water vapor coming off the warm pool generate thunderstorms so powerful and towering that their influence extends out of the tropics to the jet streams that blow across the middle latitudes. He had to run for his life when flames took hold of his house.