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

The abnormal weather this year is mainly influenced by three factors, among which the atmospheric circulation has the most severe impact on the short term, and the La Ni? a event has also caused very obvious fluctuations in our climate. Moreover, the influence of a time factor cannot be ignored here, that is, in most parts of China, it is the season of late spring and early summer. Maybe many people will have a question, it has already entered July. Why is it that the calendar has just entered summer?

First, the impact of atmospheric circulation. First of all, we need to explain the so-called atmospheric circulation to you. The reason why our whole earth can have oxygen for us to breathe at night or in winter is influenced by atmospheric circulation, because the areas 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 time, the cold air activity is very frequent, which leads to the intense airflow activity.

Second, the influence of the tropics. As we all know, apart from the influence of high latitudes, there will be a trip of high-pressure air mass at sea in the coastal areas of China every summer, which will form a very serious hedge with the air flow belt at middle and high latitudes, thus leading to tornadoes or other serious meteorological disasters, and La Nina 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 lasting rainfall in many areas.

Third, we are in early summer. As can be seen from the current situation, the precipitation in the eastern coastal areas of China is actually relatively small, and it is gradually decreasing. This is mainly because the cold air activity cycle here is very short, and the time it can affect is also very short. Therefore, after May and early June, the rain belt moved northward rapidly and continued to be affected by the airflow in central and northern China. There is abundant rainfall here, accompanied by strong convective weather.