Pacific Northwest wildfires alter airpollutionpatterns across North America AtmosNews NatureComms
The research, led by scientists at the National Center for Atmospheric Research , found that levels of carbon monoxide—a gas that indicates the presence of other air pollutants—have increased sharply as wildfires spread in August. Carbon monoxide levels are normally lower in the summer because of chemical reactions in the atmosphere related to changes in sunlight, and the finding that their levels have jumped indicates the extent of the smoke's impacts.
Buchholz said the findings were particularly striking because carbon monoxide levels have been otherwise decreasing, both globally and across North America, due to improvements in pollution-control technologies.Wildfires have been increasing in the Pacific Northwest and other regions of North America, due to a combination of climate change, increased development, and land use policies.
The results showed an increase in carbon monoxide levels across North America in August, which corresponded with the peak burning season of the Pacific Northwest. The trend was especially pronounced from 2012 to 2018, when the Pacific Northwest fire season became much more active, according to the emissions inventories. Data from the MODIS instrument revealed thatTo determine whether the higher pollution levels were caused by the fires, the scientists eliminated other potential emission sources.
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