California Weather whip Has a problem Dating for centuries, or moreFire is a natural and California's required part of the diverse ecosystemBut the so -called “Bull's eyes“In urban areas, there are complex things from spreading in Prime Wildfire Zone.
Before humans arrive in southern California, saffron is estimated, the average watershed can go from 30 to 90 years without wildfire. In addition to 20 million people and climate change, “Some places in Socal are now burning every 2 to 10 years.”
At that speed, woody shrubs cannot do it very fast after the fire, and the increasing frequency of the fire is pushing this area into an infection with chapraral and oak forests. lawn And, in some cases, bare soil. When the ecosystems lose their leaves cover and deep roots, it becomes easier to slide the downhill for the soil.
Recently, it is getting very bad. These days the southern California oscillate between wet and dried rule, which is almost rapidly sold as the latest seizures of Beyonsey. Over the last few months, Southern California is quick Downs in severe drought Immediately after its two biggest years on records. This promoted enough vegetation growth and then dried it quickly: a perfect recipe for warm, destructive, uncontrollable fire – and flows to follow the debris.
“After the change in climate, the post -debris flow is damaging, as climate is growing in the form of change, as we are seeing strong storms between more intense dry times, which can lead to instability in the first burnt areas. It is, “Vishwas Cairns, a wildfire specialist, a wildfire expert says. Arizona State University. “At the same time, the wildfires themselves are burning more intensely, leaving behind the fire affected by the fire that can leave the water and small vegetation behind to retain the slope.”
Joint, January's Palisades and Eaton's fire killed 29 people, destroyed more than 16,000 houses, and created an economic impact About 10 times bigger than the disaster of any previous forest fire in the history of CaliforniaEaton Fire, near Pasadeena, and Palisads Fire near Malibu, Now rank After 2018, as the second and third disastrous wildfire in the history of California Camp fire It destroyed the city of heaven.
Fire fighting Changing worldwideAnd when factoring in forest health erosion and More intense rain, It leads to a large frequency of post -fire debris in areas where they have occurred in the past. In fact, A recent study It is shown that “By the late 21st century, post-film debris flowing activity is estimated to increase in 68 percent of the areas, in which they have occurred in the past and only decrease in 2 percent of locations.”
According to Luke McGir, a geologist at the University of Arizona and the lead writer of that study, the chief driver here is not so much that the rain is getting heavy – there is not much rain to start the flow of debris – but the fire deteriorates Has been
Says McGuer, “If climate change gives rise to a greater possibility of medium-high-distinction,” McGuer says, “it will later increase the possibility of the flow of post-fire debris, which fuel to them Creates circumstances more often. “
And in California, the fire in recent years has certainly become more intense.
California has a 20 biggest fire in the last century In the last seven yearsThose seven years include the most dry and two biggest years in the history of the state.
Data suggests that this problem is not limited to California. “Fire activity is estimated to be extended to many parts of western America,” says McGire, “may increase the possibility of damage to the flow of debris. ,
Since the planet continues to shift to a warm, more dried-affected version, the hill will start falling in the valleys rapidly where the fire occurs. This is an indispensable result of the speed on which changes on geological scale are now taking place on the human time limit.