Many places have encountered extreme weather such as heavy rain and high temperature. Why is the weather so abnormal this year?

The number of weather this year is so abnormal, which is mainly influenced by three factors, among which the atmospheric circulation has the most severe impact on the short term, and the La Niñ a event has also caused very obvious fluctuations in our climate. And here we can't ignore the influence of a time factor, that is, in most areas of our country, it is currently in the late spring and early summer season. Maybe many people will have a question, it has entered July, why has it just entered summer, but it is actually calculated in this way on the calendar?

first, the impact caused by atmospheric circulation. First of all, we need to explain to you the so-called atmospheric circulation. The reason why our whole earth can have oxygen to be breathed by us at night or in winter is that it is influenced by atmospheric circulation, because the area with light can produce oxygen through photosynthesis of plants. At present, it is in the westerly circulation in the middle and high latitudes of Europe and Asia. During this period of time, cold air activities are very frequent, which leads to very intense airflow activities.

second, the impact of tropical areas. As we all know, in addition to being affected by high latitudes, there will be a trip of high-pressure air masses at sea in the coastal areas of China every summer, which will form a very serious hedge with the airflow belt at middle and high latitudes, thus leading to tornadoes or other severe meteorological disasters, and La Niñ a event is the most influential meteorological disaster this year. It is precisely because he brought abundant rainfall from the ocean that it caused frequent and long-lasting rainfall in many areas.

thirdly, we are at the beginning of summer. As can be seen from the present situation, the precipitation in the eastern coastal areas of China is actually relatively small, and it is gradually decreasing. This is mainly because the period of cold air activity here is very short, and the time that it can affect it is also very short. Therefore, after May and early June, the rain belt quickly moved northward and continued to be affected by the airflow in the central and northern parts of China. Abundant rainfall has been formed here, accompanied by strong convective weather.