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RT : Sweden has called for emergency assistance to help fight . At least 80 were burning yesterday and four co…
wildfires  from twitter
3 days ago by kcarruthers
RT Hoping that the in the West are contained soon and that residents can return to the comfort and safet…
wildfires  from twitter
11 days ago by CHCP
Another night of terror and calamity for Santa Barbara County as new destructive fire sweeps through
Santa Barbara has a long history of natural disaster, particularly brush fires. But the last year has been staggering. In December, the Thomas fire, the largest on record in California, ripped through Montecito, Carpinteria and other coastal cities, destroying more than 1,000 structures. Then in January, mudslides in the same area killed 21 people and destroyed more than 100 homes. The mudslides alone resulted in property damage claims of more than $421 million.
Summer  2018  July  USWest  California  BWRT  SantaBarbaraCounty  SantaBarbara  CentralCoast  Region:  Central  Coast  BestPlaces  vacation  Gaviota  GreenPlanet  Wildfires 
13 days ago by ahasteve
Greater Temperature and Precipitation Extremes Intensify Western U.S. Droughts, Wildfire Severity, and Sierra Nevada Tree Mortality: Journal of Climate: Vol 31, No 1
Crockett and Westerling, 2017: Extensive drought in the western United States (WUS) during the twenty-first century and associated wildfire and tree mortality incidence has highlighted the potential for greater area of severity within widespread droughts. To place recent WUS droughts into a historical context, the authors analyzed gridded daily climate (temperature, precipitation, and climatic water deficit) data to identify and characterize the spatiotemporal evolution of the largest WUS droughts of the last 100 years, with an emphasis on severe cores within drought extents. Cores of droughts during the last 15 years (2000–02 and 2012–14) covered a greater area than in earlier droughts, driven by greater temperature and precipitation extremes. Comparing fire extent and severity before, during, and after drought events using the monitoring trends in burn severity dataset (1984–2014), the authors found fire size and high-severity burn extent were greater during droughts than before or after. Similarly, recent Sierra Nevada forest mortality was greatest in cores immediately after the drought. Climate simulations anticipate greater extremes in temperature and precipitation in a warming world; droughts and related impacts of the last 15 years may presage the effects of these extremes.

Westerling summary via tweet: Western US drought conditions significantly increase both area burned and the fraction that burns at high severity, and recent droughts have been associated with increasing extremes in both temperature and precipitation.
drought  wildfires  heatwaves  CaliforniaDrought  USA  climate_impact_reporting  Climate_Science_study 
17 days ago by huntercutting
Burning Problem - Alta Online
3 July 2018 - California Insurance Commissioner Dave Jones has said cities and counties must find ways to put fewer homes in places that are primed to burn. In a report released in January, his office noted that from 2010 to 2016, complaints more than tripled from people in high-wildfire-risk counties about insurance companies that raised their rates or refused to insure their homes.

Included in the report is a letter sent to a Cal Fire task force member two weeks before the Tubbs Fire, in which insurance industry groups explained their reasoning: “Fires now burn hotter, and as a result, mitigation — even defensible space — will not always save a community or home.”
CS-  wildfires  insurance 
18 days ago by huntercutting
🔥 more proof MOST are caused by humans

🔥Make sure your is completely out…
SardinasCanyonFire  campfire  wildfires  from twitter_favs
19 days ago by pamneely
Effect of reduced summer cloud shading on evaporative demand and wildfire in coastal southern California - Williams - - Geophysical Research Letters - Wiley Online Library
Park Williams et al 2018:

Cloud shading limits surface radiation, thus reducing vegetation water stress and, presumably, flammability. Since the early 1970s, cloud observations from airfields in coastal southern California (CSCA) indicate reductions of ~25–50% in warm‐season frequency of daytime stratus clouds at many sites, including fire‐prone wildland‐urban interface (WUI) zones. We use 10 years of meteorological, surface radiation, and cloud observations to statistically model the effects of clouds on warm‐season surface energy fluxes in CSCA. Forcing our model with cloud observations, we estimate that reduced warm‐season cloud shading since the 1970s significantly enhanced daytime solar radiation and evaporative demand throughout much of CSCA, particularly in greater Los Angeles. Correlation with burned area and live fuel moisture implicates stratus cloud shading as an important driver of warm‐season wildfire activity in CSCA. Large reductions in cloud shading have likely enhanced warm‐season wildfire potential in many CSCA areas when and where fuels are not limiting.
Plain Language Summary

In much of coastal southern California, the frequency of summer clouds has declined rapidly in recent decades due warming from urbanization and greenhouse gases. These reductions have significantly reduced cloud shading and increased evaporative demand, particularly in greater Los Angeles and northern San Diego, such that a relatively cloudy summer today is similar to a relatively clear summer in the 1970s. Clouds appear to be important regulators of summer wildfire activity in this region, as the shade they provide slows loss of moisture from vegetation. On the vegetated mountainsides that ring coastal southern California's large cities, increases in summer sunlight and evaporative demand have likely enhanced summer wildfire potential over the past several decades. This effect is expected to continue due to continued urban expansion and positive feedbacks, where warming due to cloud loss promotes further warming and cloud loss.
wildfires  attribution  Climate_Science_study  California 
7 weeks ago by huntercutting
Increasing Heat Is Driving Off Clouds That Dampen California Wildfires
Park William et al 2018: Sunny California may be getting too sunny. Increasing summer temperatures brought on by a combination of intensifying urbanization and warming climate are driving off once common low-lying morning clouds in many southern coastal areas of the state, leading to increased risk of wildfires, says a new study.

“Cloud cover is plummeting in southern coastal California,” said Park Williams, a bioclimatologist at Columbia University’s Lamont-Doherty Earth Observatory and lead author of the research. “And as clouds decrease, that increases the chance of bigger and more intense fires.” Williams said the decrease is driven mainly by urban sprawl, which increases near-surface temperatures, but that overall warming climate is contributing, too. Increasing heat drives away clouds, which admits more sunlight, which heats the ground further, leading to dryer vegetation, and higher fire risk, said Williams. The study appears this week in the journal Geophysical Research Letters.

The research follows a 2015 study in which Williams first documented a decrease in cloud cover around the sprawling Los Angeles and San Diego areas. Urban pavement and infrastructure absorb more solar energy than does the countryside, and that heat gets radiated back out into the air–a major part of the so-called heat-island effect, which makes cities generally hotter than the rural areas. At the same time, overall temperatures have been rising in California due to global warming, and this has boosted the effect. In the new study, Williams and his colleagues have found a 25 to 50 percent decrease in low-lying summer clouds since the 1970s in the greater Los Angeles area.
wildfires  California  LosAngeles  CS  Climate_Science_study  attribution 
7 weeks ago by huntercutting

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