Canada’s temperature extremes table doesn’t include recent records
<span>Screenshot of X’s post taken on July 8, 2024</span>” data-src=”https://s.yimg.com/ny/api/res/1.2/7eT7gkLTsU87XV3xuy9Rkw–/YXBwaWQ9aGlnaGxhbmRlcjt3PTk2MDtoPTk5Mw–/https://media.zenfs.com/en/afp_factcheck_us_713/e2fb9bd019d89259bdc58db334a81076″/><span></div>
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A screenshot of X’s post taken on July 8, 2024

One of the categories in the table is titled “Province or Territory,” but the social media post does not include the four Canadian jurisdictions. NunavutYukon, Northwest Territories, and British Columbia.

Simon DonnerProfessor and climate scientist at the University of British Columbia (archive here) said these omissions are significant because they ignore all state and local temperature records measured in the 21st century. Best Canada Ever 49.6℃ (121.2℉) Lytton, British Columbia June 29, 2021.

“This is just a cherry-picked selection of data that is not actually the most extreme temperatures ever recorded in Canada,” Donner said on July 3, 2024.

2021 Heat Dome

June 2021, North America Experienced The stagnant bubble of hot air set temperature records across the western U.S. and Canada. Donner said excluding British Columbia not only excluded the national record set in Lytton, but also failed to take into account other extreme heat recorded in the province that summer.

“That doesn’t take into account the heat waves that have claimed the lives of hundreds of Canadians in 2021,” he said.

According to local reports, health authorities estimate Extreme temperatures that June killed about 600 people in Canada. The day after Lytton set a national record for the highest temperature in the country, a village in British Columbia Almost completely destroyed Caused by a nearby forest fire.

Misleading posts on social media claim that warnings about recent extreme conditions are an overreaction, but researchers Predict Heat domes like those experienced in 2021 will likely become more intense due to human-caused factors. Climate Change (archive here).

There Near universal agreement Burning fossil fuels is causing the average global temperature to rise (Archive hereDonner said historically cooler regions are warming more quickly than other parts of the world, with smaller temperature differences. Become slow Weather patterns may allow the heat dome to take hold and strengthen over a long period of time (archive here).

<span>Diagram explaining the formation "Heat Dome"</span></p>
<div><span>Melody Rontjens</span><span>Sabrina Blanchard</span><span>AFP</span></div>
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Diagram explaining the formation of a “heat dome”

Melody RontjensSabrina BlanchardAFP

“We’re seeing more of these blocking events and a slowdown in the air in the upper atmosphere,” Donner said, “which is what you’d expect as we add more greenhouse gases to the atmosphere.”

During a heat dome observed off the east coast of North America in June 2024, AFP Exposed There have been separate claims that predictions about extreme temperatures have been exaggerated.

What does the data contain?

Environment and Climate Change Canada (ECCC) maintain The country keeps weather records going back to the 19th century, and on July 2 the highest temperature records for each state and territory were published by AFP.

According to ECCC data, two additional records were set in the 21st century that were not included in the social media charts. Yukon In 2004, it reached 39.9°C (103.82°F), Northwest Territoriesand at the Heat Dome in June 2021 (archive) here and hereThe ECCC: Nunavut In 1989, it was 34.9°C (94.82°F); Separated Northwest Territories (Archive) here and here).

Outside of the states and territories excluded from the social media graphs, the ECCC data recorded higher and slower rates than claimed in the posts. Alberta, Ontario and Quebec (archive here, here and here).

<span>A table showing Canadian temperature records published by Environment and Climate Change Canada on July 2, 2024. Reformatted by AFP</span>” data-src=”https://s.yimg.com/ny/api/res/1.2/zuGulNqVn8F8qqKzl8eieg–/YXBwaWQ9aGlnaGxhbmRlcjt3PTk2MDtoPTI3OQ–/https://media.zenfs.com/en/afp_factcheck_us_713/4b406b4a8fb9170e78d409a4db6b23db”/><span><ボタンクラス=

Table showing Canadian temperature records published by Environment and Climate Change Canada on July 2, 2024. Reformatted by AFP.

In Newfoundland and Labrador, the ECCC set a new record of 37.8 °C (100.4 °F), breaking the previous record twice. 1944 and 1953 (archive here and hereAs seen in social media posts, a temperature of 38.3°C (100.9°F) was recorded in the state on July 6, 1921. exist Historical data from government agencies (archives hereECCC spokeswoman Hannah Boonstra said the measurements are not included on state and territory records lists because they require verification.

“While this value may be considered valid, it has been excluded from the table provided until its validity can be confirmed in the future,” Boonstra said.

The E.C.C.C. To tell It has been reported online that past measurements may be in error, and Boonstra explained that the daily maximum temperature values ​​are compared to hourly temperatures and measurements from surrounding stations to assess whether the values ​​are suspect (archive here).

Canada is warming faster

2019 study Canadian government report says Canada is warming twice as fast as the rest of the world (archive) here). Travis Moore, researcher in Climate and Atmospheric Sciences and Extreme Weather from Concordia University (Archive) here) is the highest annual average temperature in Canada. Recorded Past 20 years (Archive here).

Moore said as temperatures rise, colder regions will feel the effects sooner and he was shocked to see no mention of Canada’s far north in the social media posts.

North “There are some very impressive records,” he said.

Canada’s Arctic is warming more rapidly than the rest of the country. 2022 Finnish Studies (Archive) here) found that melting sea ice reduces the surface area available to reflect solar radiation, allowing more heat to be absorbed in northern regions, creating a positive feedback loop for warming.

Moore emphasizedCanada and the Northern Hemisphere are warming more rapidly, but all of these rates are calculated from global averages, making 2023 the hottest year on record. record.

Read more AFP coverage on climate change and environmental misinformation here.

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