It’s been another mind-boggling stretch for fire in Canada, amid what has become the largest season in the modern record for the country, according to statistics compiled by the Canadian Interagency Forest Fire Center.
by the boreal forest fires is incredibly dense and foreboding. Unlike many forest fires where flames tear through the tree crowns and move on, boreal forests burn as much at the ground level because of extensive flora as well as other biomasses like peat.
On Sunday, smoke from Canadian fires stretched across the Atlantic Ocean, with a relatively thick plume apparently on its way to parts of Europe.Code Purple and Code Maroon air quality index values returned to much of eastern Canada in recent days. Under high pressure, smoke plumes have tended to hang around before being caught up in the normal mid-latitude westerly wind flow.
Code Red begins the unhealthy level for general population, with Code Purple equal to very unhealthy and Code Maroon the worst of all, with hazardous conditions.Despite the scarcity of official observation stations in Quebec and Ontario, daily peak values of 509 AQI were reported on Saturday.On Sunday, Code Red and Purple hourly observations were common from the international border region of the Great Lakes eastward to New Brunswick and Prince Edward Island.
Looking at a time series of maximum 24-hour code from EPA, the recent spike in activity is plainly seen, even with very few locations to observe the smoke in eastern Canada. There have now been a number of extensive smoke episodes driving air quality deep into the unhealthy and hazardous zones. The 509 AQI recorded Saturday was the highest of the stretch since these fires began in early May. Poor air quality is likely in many of the same regions over the next few days, while ahead of low pressure to the west. Some of the worst air may creep into New England late Monday into early Tuesday, as smoke also rotates southward on the back of the low across the Upper Midwest.
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