Extreme weather is frequent all over the world. What is behind the drought in the south and the flood in the north?

We can't change the extreme weather in the world. We can only analyze the formation of these weather. The biggest reason for the drought in the south and the waterlogging in the north is that there are more typhoons in Jiangsu and Zhejiang provinces, but there are no typhoons in South China during the waterlogging season, so the waterlogging will definitely be in the Yellow River basin. The details are as follows: First, typhoons will cause heavy rains and also transport rain clouds.

As we all know, the typhoon fireworks caused serious disasters in Henan, and suffered a once-in-a-century torrential rain. Fireworks are registered in Jiangsu and Zhejiang, and many people don't understand why it has such a great impact on Henan.

This principle is actually very simple. A typhoon is rotating. It will absorb the airflow and transport it. When transporting it, if it passes through a mountainous area, it will be slowly absorbed under the block of trees and mountains. However, after the fireworks log in, the conveyor belt is plain, so its consumption will be very low. We can look at its route map.

Through the route, we can know that wherever fireworks go, they are all plain areas, so they can directly blow past Ma Pingchuan with rain clouds. However, why did it just rain so heavily in Zhengzhou? Because when I got there, I met the Taihang Mountains, and all the rain clouds accumulated in Henan and Hebei. Zhengzhou was just in front of the Taihang Mountains, so it became the hardest hit area. Let's take a look at the topographic map of our country:

So, why did Henan suffer before the fireworks landed?

that's because before the typhoon landed, the airflow was already moving, but it was not on the ground, but in the air, so although we didn't feel the wind, the wind in the air had sent the rain cloud to the place where it would go, which is the importance of typhoon path prediction. Second, typhoons will also attract airflow.

after talking about the conveying airflow, let's talk about the attracting airflow of the typhoon.

as mentioned above, the typhoon is rotating, and its center is a vortex. Its air flow is to suck the surrounding airflow to the middle, just like our fan. It will suck the surrounding airflow away by rotating, and then a strong wind will come out from the eye of the typhoon, which will become a typhoon.

if there are rain clouds in some areas, the airflow formed by typhoons will slowly disperse the rain clouds, making the original heavy rain smaller, and if there is cold air, it will gradually cool down.

however, why was there a rainstorm in Shanxi before? Actually, it's still the fireworks. As I just said, the fireworks stopped when they reached the front of the Taihang Mountains, and the rain of large troops was put in Zhengzhou, but it was only put down, which does not mean that the whole Taihang Mountains were not affected at all. Then now the temperature drops, the cold air comes, the rain condenses, and the rain naturally comes. 3. After the double typhoons in South China, the heavy rains in Shanxi and Shaanxi should begin to clear up.

Now that the two typhoons "Lion Mountain" and "Compass" in South China have arrived, the two typhoons have caused two wide areas to cool down, that is, they sucked down the cold air in the north, and then slowly, the rainstorm in several places in the north will gradually become smaller and clear, and then there should be no major problems in winter.

after a lapse of more than two months, theoretically, if the rainstorm in Shanxi is carried out manually, the artificial rainfall mode will be started in August and September. If there are rain clouds, the rain will be dispersed, and the disaster may not be so serious. However, the difficulty is that it is still a guessing stage. Generally, artificial rainfall will only be activated when the drought comes, and it is okay that the local personnel involved in artificial rainfall can be drowned by spitting. 4. If there are many typhoons in South China, there will be no storms in the north.

We can look back to the previous ten or twenty years. In the years with frequent typhoons in South China, there is basically no rainstorm in Henan, Hebei, Shanxi and Shaanxi, which should be less rainy. There are almost no typhoons in South China this year, so the south is dry, while the north is badly waterlogged.

In the years when there are many typhoons in South China, the Yangtze River basin will be seriously affected, while in the case of many typhoons in Jiangsu and Zhejiang provinces, the Yellow River basin is naturally prone to floods.