September 28, 2021

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The study says Canada’s heat wave is “almost impossible” without climate change Climate and environment

Unusual heat wave It hit southwestern Canada and the northwestern United States last week with record temperatures that would have been “almost impossible” if the planet had not sunk. The process of climate change induced by human-emitted greenhouse gases. This is concluded by the express analysis prepared by the scientists World weather characteristic (WWA), an international team dedicated to analyzing the impact of global warming on extreme weather events. As climate change accelerates, researchers warn that strange phenomena such as this wave are “extremely rare.”

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A heat wave off the Pacific coast of North America that killed hundreds of people and joined them Severe wildfire, Has emerged from all historical temperature tables. This is because, as the authors of this report point out, it is not normal for the latitude of the heat wave to be above 45 degrees.

In the small Canadian town of Lytton (about 250 people and at a latitude similar to Berlin) 49.6 degrees was recordedIn Spain, the temperature recorded in 2017 was 47.3 degrees Celsius in Montero (C கோrdoba), according to local newspapers. The authors of this express analysis explain that “the observed temperatures were very intense and they are far from the historically observed temperature range”.

Reports attributing extreme events to climate change often analyze data to determine if they are likely to have occurred in the absence of global warming. If a heat wave occurs on the Pacific coast of the United States and Canada, it is 150 times more likely due to climate change.

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Dozens of people sleep in air-conditioned facilities during an unprecedented heat wave on June 27 in Portland, Oregon, USA.
Marani Stop / Reuters

Sonia Seneviratne, of the Institute of Atmospheric Sciences and Climate Science in Zurich, explained, “Climate change is one of the rarest cases in the world. We are entering an unnamed territory.

Researchers also conclude that this heat wave was two degrees warmer than it was at the beginning of the Industrial Revolution, before humans began to use fossil fuels on a large scale. The main responsibility for greenhouse gas emissions.

While the heat wave was still active, the World Meteorological Organization (WMO) It has already warned that this is an “exceptional and dangerous” phenomenon. WMO does not have a direct relationship with the climate change of this phenomenon, but note that scientific studies point to an increase in waves due to global warming.

WWA researchers emphasize the same point when they point out that as warming progresses, waves like last week will be very rare. These scientists argue that the climate crisis is leading humanity to a new situation, which “has significant implications for health, well-being and lifestyle.” That is why they call for reducing greenhouse gas emissions and adapting to the effects of the currently irreversible warming, so that the community is ready for a “very different future.”

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