The heat wave in Canada is as high as 49.5℃, causing hundreds of deaths. Why is this happening?

According to reports, it may be known that the persistent high temperature in Canada is due to the so-called "hot dome" effect, that is, the phenomenon that high pressure in the atmosphere concentrates in a certain area and pushes warm air to the ground. When the warm air tries to rise, the high-pressure system above will push the warm air back to the ground. When the warm air is further compressed, the temperature in this area will rise further. Therefore, when the heat wave strikes, there is nowhere to hide, just like a vegetable greenhouse. But many people don't know why the "hot dome" effect will be staged in Canada near the North Pole.

Multinational meteorologists say that Canada's "hot dome" is also the result of climate warming. In the international meteorological definition, if the temperature in a region is higher than the historical average for two consecutive days or more, it can be defined as a "heat wave", and this high temperature weather in Canada has reached the standard of heat wave.

Although it is difficult to link any independent meteorological event with the rise of the earth's temperature in meteorology, global warming will indeed increase the probability, frequency and intensity of extreme weather such as heat waves. The high temperature in Canada broke the national high temperature record, and even some areas broke the high temperature record in 84 years. Therefore, we have reason to believe that this high temperature is related to global warming.

In addition, the long duration of hot air in Canada is also related to the long duration of "hot dome", which is due to its own strength. Traditionally, the "hot dome" effect is generally dispelled by the fast-flowing airflow in the upper atmosphere within 24 hours. However, Canada's "hot dome" not only carried several rounds of airflow, but also fixed the airflow around it, which further promoted the stability of the "hot dome" and led to hundreds of people dying of heatstroke in a week.

Some people may wonder why Canadians don't turn on the air conditioner in high temperature, and why hundreds of people die of heat, which is absolutely impossible in China. In fact, this is related to the traditional climate in Canada. The latitude of Canada is higher than that of China. Usually the climate is mild, and many families don't need air conditioning. Most air-conditioned buildings are stadiums and shopping malls, so we can't measure Canada by our latitude.

In addition, in hot weather, the urban somatosensory temperature will be higher than the measured temperature, because people and buildings in urban space are dense and absorb more heat than in rural areas. Therefore, under the influence of high temperature, thermal death occurs more in cities in Canada.

As for what human beings should do, there is no good answer, because global warming has become a commonplace topic, and the views of all countries in the world are basically unified, but many norms have not been implemented in the agreed direction. Perhaps in the future, it is more important for big countries to set an example in dealing with global warming.