It is reported that a large area of rainfall in the south has continued until this weekend. Why does the south fall into continuous wet and cold?

Recently, large-scale precipitation has continued in cities in the south, which has affected people's travel and aggravated the wet and cold weather in the south. So why does the south fall into a continuous wet cold? Today, let's discuss it together.

First, global warming and extreme weather are increasing. Abnormal precipitation in southern cities of China. The increase of precipitation leads to the increase of evaporation and water vapor in the air, so the water content increases. Recently, global warming has brought many adverse effects. Extreme weather has increased, and heavy precipitation has occurred in most cities in the south, which has weakened the flood storage capacity of rivers. Most of the precipitation will enter the air circulation system and be evaporated. so this is it？ Wet and cold? The moisture source inside will increase the water vapor in the air, making the body feel more humid and causing human discomfort. Because of large-scale precipitation, water vapor evaporates and absorbs heat, which will take away most of the heat in the air. That's it? Wet and cold? It is cold in the middle, so continuous precipitation in the south will cause continuous wet and cold in the south.

Second, the continuous wet cooling in the south is affected by the subtropical monsoon climate. Subtropical climate generally has a large amount of precipitation, which will aggravate the humidity in the air. The southern part of China is in subtropical monsoon climate. In spring, the water vapor from the South Indian Ocean and the Atlantic Ocean will go north along the monsoon, which will bring the moist airflow of the ocean and greatly aggravate the water vapor in the air. Moreover, there are a large number of rivers in southern China, which will evaporate water into the air, and there is more precipitation in the subtropical monsoon climate in summer. These are the reasons for the continuous wet and cold climate. The humid and cold climate will cause human discomfort and easily induce skin diseases such as arthritis and eczema.

Thirdly, due to the complex and diverse topography in southern China, water vapor and moisture are easy to gather and not easy to disperse, so it is not difficult to find that there are many mountains, hills and plateaus in southern China, and cities are often built in flat plains, which is doomed to be surrounded by hills and mountains, and it is difficult for hot air and cold air to dissipate, resulting in a particularly high body temperature when the weather is sunny and hot. When it rains continuously, people will feel very wet and cold. When the temperature changes greatly, there will be convective weather inside the city, which will aggravate the wet and cold situation.

The above are the main reasons why the south is caught in continuous wet and cold. In the face of wet and cold weather, we should keep warm and avoid catching a cold.