Scientists warn again: the earth's climate is polarized! Where should mankind go from here?
Scientists warn again: the earth's climate is polarized! Where should mankind go from here?
Climate polarization
Argentina, Brazil, Peru, Bolivia, Paraguay? These South American countries have mild winters. For example, most parts of Argentina have subtropical and temperate climate, and the temperature rarely drops below 0℃ in winter. However, last week, due to the attack of polar cold air, there were low-temperature weather and large-scale snowfall that lasted for many days all over the country. The lowest temperature was always below 0℃, and even below-10℃ in some areas. People were still shivering when they went out wrapped in thick winter clothes. The Argentine Civil Defence Department said on July 19 that at least 16 people in Argentina were frozen to death and another 12 people died of carbon monoxide poisoning while heating.
In the northern hemisphere in summer, heat wave attacks are also unusual. Russia is experiencing the highest temperature in a century. In recent days, the highest temperature in Moscow has been around 35℃, and the temperature in Bekovo airport area has reached 38℃. The hot weather even caused the expansion and damage of the subway track, which led to the interruption of a subway line. Nearly 300 people in Russia drowned while looking for coolness. Russian meteorologists say that Moscow may have the hottest summer in 130 years this summer. At the same time, Japan has also experienced a rare 38℃ hot summer weather.
Behind the scenes: abnormal atmospheric circulation
Rare? 、? Rare? 、? Not for decades? 、? Once in a hundred years? 、? The word historical extreme is used more and more. What happened to the weather this year?
From the meteorological point of view, the direct cause of extreme weather and climate events is abnormal atmospheric circulation. For example, the high temperature is due to the persistence of warm and high pressure, and the occurrence of heavy rain in the south is also due to abnormal circulation. The subtropical high is relatively south, and a large area in the south is conducive to the continuous convergence of cold and warm air. ? In recent years, with global warming, extreme weather and climate events and their serious disasters are on the rise. ?
Meteorologists generally believe that global warming makes the surface temperature rise, which not only increases the total amount of water vapor evaporated into the atmosphere, but also speeds up the water cycle. There will be more precipitation in a short period of time, the frequency of extreme precipitation and local floods may increase, and strong convective weather such as thunderstorms and hail will also increase in some areas. ? Although this year's extreme weather and climate events and? El Nino? 、? La Nina? And then what? Arctic oscillation? I can't get away from the relationship, but what kind of relationship it is, the experts' explanations and opinions are still controversial, and it is still difficult to say clearly at present. ? Scientists say that there are too many factors that affect the climate, and these may be just the tip of the iceberg.
The global climate and environment are facing severe challenges. Most mainstream scientists believe that industrial carbon emissions and other greenhouse gases make the global temperature rise, and the global temperature polarization is serious, and finally the human living environment is facing challenges.