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You don’t imagine it.カリフォルニアの火災シーズンは、実際には、20年前よりもカリフォルニアのほぼすべての地域でより早く始まり、長持ちしています。
In Sierra Nevada, fire season begins about 24 days earlier than in the early 1990s. It is 31 days ago in the northern basin and range areas that run along Nevada and the northernmost tip.
And in the cascade range that appears in Oregon, the fire season begins 46 days earlier than before, according to a study published this week in the journal Science Advances.
“Anecdotally, those of us living here have this sense that it’s been happening sooner,” said Amanda Fencl, a Berkeley-based water specialist who directs climate science for the climate and energy program at the Union of Concerned Scientists and was not directly involved with the research.
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The number of people living in California has increased by about 27% since the early 1990s, but during that time, fires fought by humans have significantly reduced, allowing researchers to rule out human flames as a cause of additional burning days.
Rather, they found that the most important factor that pushes the fire season forward is climate-related. As the average temperature increases, there is an increase in early snow thaw and soil dryness and flammable vegetation.
“The main drivers are climate and weather conditions,” said Gavin D. Madakumbura, a postdoctoral researcher and lead author of the study.
This effect is particularly pronounced in Northern California, with fires pose a near constant threat in some areas.
“It’s often said we aren’t like that anymore [have] It’s Wildfire season, but wildfire season is all year round. It’s tied to the temperature of global warming,” said James Thorne, ecologist at UC Davis Landscape.
He said that, as with this paper, clearly linking the longer fire season to artificial climate change is “a study that someone has been hoping to do for a long time.”
California is already paced to see more fires and significant burn area than last year.
More than 220,000 acres had been burning in the state as of mid-July, according to the California Department of Forestry and Fire Prevention.
That total doesn’t include the 96,000 acres burned in the Gifford fire, which had 15% as of Thursday, nor does it include three different fires that began Monday in Southern California, which burned more than 2,800 acres and not yet included.
It is also the worst year of fire-related economic damages.
In 2018, when camp fires destroyed paradise towns and killed more people than any wildfire in California’s history, a statewide wildfire was an estimated $148.5 billion.
The Palisade and Eton fires in January could have caused up to $164 billion in damage, according to a UCLA investigation.
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