China has carried out a comprehensive natural disaster risk investigation. Why are extreme weather frequent in recent years?

Global warming intensifies extreme weather. Although the occurrence of bad weather is random, global warming is the real black hand behind extreme weather.

In the past, meteorologists usually thought that some extreme weather cases should not be attributed to climate change because of the diversity of weather changes. However, in recent months, this position has begun to loosen in academic circles, and many studies have found that climate change is being staged in front of human beings in the form of extreme weather. ?

Many years ago, scientists began to try to understand the possibility of various meteorological events with the help of computer models and various factors. After dozens of studies, it has been proved that 25 kinds of climate phenomena are related to greenhouse gases produced by human activities, which in turn lead to climate warming. The emission of greenhouse gases directly induces extreme weather.

In fact, the story behind it is far more than that. Global warming caused by human beings is the most fundamental reason. John nelson Gamon said that compared with 1970, the global temperature rose by an average of 0.5 degrees Celsius, which was mainly due to the massive emission of greenhouse gases into the atmosphere. It is this rising temperature that causes some extreme heat waves, droughts and other extreme weather. Besides, the rainfall is very small now. Why? Warm? The weather has added another fire.

That's not all. With the increase of ocean temperature on the earth, the ocean has transported more water vapor to the atmosphere, which has increased by about 4% since 1970. More water vapor in the atmosphere means more opportunities for heavy rain, just like what happened in Beijing in July. This rainstorm in Beijing is said to be once in 60 years. As we all know, if the fire in the stove is turned up, the water in the pot will turn into steam at a higher speed. The more water vapor in the atmosphere, the more heavy rain. ?

But the weather on a specific day depends largely on luck, but the increase of atmospheric humidity and the increase of atmospheric temperature make the probability of extreme weather increase. Gerald Mill, a scientist at the National Center for Atmospheric Research in Colorado, thinks? All these are due to the emission of greenhouse gases. A little more carbon dioxide enters the atmosphere, the probability of extreme weather will increase, and the weather that people thought was extremely rare before may never appear again. ?