Dangerous air pollution that triggered days of air-quality health alerts in New York City has been traced back to Canada. Researchers at Yale University traced the air pollution to wildfires in British Columbia. The state of New York issued air quality health advisories in the New York City metro area and Long Island on Aug. 16 and 17. Using air quality measurements along with smoke maps and air parcel back-trajectory computer modeling, researchers traced the atmospheric flow backwards in time. A previous study had traced air pollution over Washington, DC, to a wildfire in Quebec in July, 2002.

Source: National Post February 06, 2020 18:35 UTC