N.W.T. wildfires have emitted 280 times more carbon than its people

CBC
Mon, August 28, 2023 

An aerial view of the wildfire threatening the Yellowknife area from Aug. 17. The intensity of the fire dampened over the weekend thanks to rain, lighter winds and cooler conditions. (N.W.T. Fire - image credit)

Wildfires in the N.W.T have emitted 97 megatonnes of carbon into the air so far this year — 280 times more than what was caused by humans in the territory back in 2021.

Mark Parrington, a senior scientist working at the European Union's Copernicus Atmosphere Monitoring Service (CAMS), said the N.W.T. has contributed the most of all the provinces and territories to Canada's total wildfire emissions.

From the start of the year up until Aug. 23, wildfires across Canada have emitted 327 megatonnes of carbon into the air according to CAMS data. (For context, one megatonne is a million tonnes.)

More than a quarter of that has been generated by wildfires in the N.W.T., which began burning back in May and have displaced tens of thousands of residents across 10 communities this summer — including the capital city of Yellowknife. The fires have caused damage so far in Kátł'odeeche First Nation, Enterprise and Behchokǫ̀. Hay River and Kátł'odeeche First Nation have been displaced twice by wildfire in a matter of months.

Houses in Enterprise, N.W.T., that were burned by wildfire. (Tyson Koschik/CBC)

"We can all unequivocally agree this is climate change at the very root of this," said Jessica Davey-Quantick, a territorial wildfire information officer, during a press conference last week.

"We're going to see more active fire behaviour, more extreme weather, more drought-like conditions — all of those factors have kind of combined. But it's really hard to say that there's one culprit that led it to communities this year, when it didn't in previous years."

How does it all compare to 2014?

The N.W.T.'s vast boreal forest usually sequesters more carbon than it emits — except during big fire years.

Up until now, 2014 has been considered the territory's worst wildfire year. According to CAMS data up until Aug. 23, the current wildfire season has not quite eclipsed 2014 in terms of emissions. (It has, however, if you compare it to Natural Resources Canada data which says fires that year emitted roughly 94.5 megatonnes of carbon).

Drone aerial still photo of houses in Enterprise, N.W.T., on Aug. 24 that were burned by wildfire. (Tyson Koschik/CBC)

According to N.W.T. Fire, 2.96 million hectares of land have burned in fires so far this year, but they're working to to calculate an updated figure — they said the territory is well on it's way to beating the record set back in 2014 of 3.4 million hectares burned.

Wildfires emit more than just carbon

CAMS monitors where wildfires are around the world, and how intensely they're burning. It also tracks emissions and forecasts the effect smoke has on the atmosphere.

Parrington said they're able to do this using meteorology and satellite imagery. It's important to monitor wildfire emissions, he said, because of the effects it has on air quality and human health.

"Fires release far more pollutants into the atmosphere than the usual activities like road transport, energy production, industry," he said. "As well as the carbon gases, there's a lot of very harmful and hazardous constituents of smoke, including particulate matter, things like benzene, which a lot of people might associate only as an industrial pollutant."

When fires stop and the wind shifts, Parrington said air quality improves — but pollution from wildfires can persist for a long time if it settles on rivers and water bodies too.

The link between fires and climate change

World Weather Attribution, a U.K. based group that estimates the contribution of climate change to individual extreme weather events, recently released a study that found record-setting fires in Quebec earlier this year were made twice as likely because of human-caused warming.

The group says it's exploring options to study wildfires in other parts of Canada.

Yan Boulanger, a forest ecology scientist with Natural Resources Canada and an author of the already-published study, said its findings can be extrapolated to Canada's North.

A member of B Company, 2nd Battalion, Royal 22e Régiment, conducts Type III firefighting operations in the vicinity of Hay River, N.W.T., in support of Operation LENTUS on Aug. 22. (Corporal Jonathan King/Canadian Armed Forces)

Quebec is one of the areas of Canada that's least affected by climate change, he explained, yet climate change still played a very big role in the fires there.

Given that climate change is having a bigger effect on British Columbia, Alberta, Saskatchewan, Northwest Territories and Yukon, Boulanger said wildfires in those provinces and territories are probably made more than twice as likely by climate change.

"These are very, very conservative estimates," he said.

Still, Boulanger said he's shocked by the record number of people displaced across the N.W.T. and the evacuations that have taken place in Quebec, B.C., Alberta, Ontario, Manitoba, Saskatchewan and Yukon.

He said Indigenous people are over-represented among evacuees, and they will continue to be over-represented in the future because their communities are typically in very fire-prone environments.

World Weather Attribution's Quebec analysis has not yet been subject to scientific peer review, but it is based on peer-reviewed modelling. In the past, the research group has subjected its analyses to review and has not had to change its findings.