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Note: Values on coloured map derived from aerosol optical depth data captured by satellites. City data obtained from monitoring stations. The two sources are not necessarily consistent.
“When levels go up today compared to yesterday, we just see more people dying,” he said. “We’ve known this for air pollution and PM2.5 for decades now, but we now also have really strong evidence for wildfires. According to the World Resources Institute, which tracks wildfires, boreal forests in high-latitude regions are losing more tree cover, likely because these areas are warming more quickly than other parts of the planet. That’s resulting in more numerous and severe fires, and it’s also extending fire seasons.A 2016 study of 561 wildfire-prone counties in the western U.S. estimated that, as climate change progresses, by mid-century the average wildfire-specific PM2.
Trees in the boreal forest near a residential neighbourhood of Fort McMurray recover in 2017 after the wildfires there.“For the vast majority of people, these events will be reasonably well tolerated,” said Chris Carlsten, a professor at UBC with expertise in respiratory medicine and air pollution.
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