Is it a good thing that there is no typhoon in July for the first time in 7 1 year?

This is caused by the anomaly of subtropical high caused by El Nino and the anomaly of sea surface temperature in tropical Indian Ocean. It is not a good thing or a bad thing, but a natural climate phenomenon.

Why July? Empty station? ?

The formation of typhoon is related to many factors. From the climate point of view, it is closely related to monsoon activity, atmospheric low-frequency oscillation and marine thermal conditions. From the weather point of view, the formation of typhoon requires three high conditions, that is, high sea temperature, high humidity and high convective instability. Only in this way can the geostrophic deflection force and vertical shear of weak ambient wind be formed, which becomes the condition for the formation of initial dynamic disturbance. However, this year's subtropical high anomaly caused no typhoon in July. It can be said that the subtropical high is really behind the suppression of typhoon generation, and its strength is closely related to this year's El Ni? o effect.

/kloc-El Nino events began to appear in the autumn of 0/9. At first, the western Pacific subtropical high was strong and large. The tropical high in the northwest Pacific controlled by the subtropical high generally shows a downward flow, and the convection activity is suppressed, lacking the necessary conditions for the formation of typhoons.

What effect will there be without a typhoon?

According to the statistics of climate big data, typhoons have been generated in the first half of the last 70 years. In less than two years, a total of 16 typhoons were generated, of which 1 1 typhoons were related to El Nino events, such as 16, and no typhoons were generated in the first half of the year. This is because of the strong El Nino event, the cold air activity in the southern hemisphere this summer. The more airflow it produces, the weaker it is, resulting in a serious lack of driving force. Since May, the South China Sea monsoon has also been weak, and the tropical negative high pressure has caused the vast western Pacific on the south side to be controlled by strong easterly winds, making it difficult to form seasonal trends in the western Pacific and the South China Sea. Therefore, the convective cloud activity in the South China Sea and the eastern tropical ocean is much weaker than that in the same period. These conditions work together to cause this year's typhoon? Frequent obstruction? .

When there is a typhoon, it is necessary to prevent the secondary disasters hidden by the rainstorm brought by the typhoon. However, judging from the global climate this year, if there is no typhoon coming to the coast of China and the coast of the Sea of Japan, Southeast Asia and India will lose more than 1/4 of the precipitation, and the fresh water supply may be tight.

Typhoons may occur frequently in August.

The number of typhoons this year is relatively small, which will still affect the normal life of human beings to a certain extent. Without the storm brought by typhoon to drive away the high temperature, the temperature in tropical and subtropical areas will be hotter and the surface drought will be more serious, but the cold zone will be colder and the temperate zone may disappear. Since June, high temperatures have continued in many places in South China. For example, there have been 33 consecutive high temperature days in Fuzhou, Fujian, and 40 consecutive high temperature days in Haikou, Hainan.

Although we saw the 1 empty station in July, according to the forecast of the Meteorological Group, typhoons will be very frequent in August, and there will be no typhoons in July, which does not mean that typhoon activities will weaken in the second half of this year. Maybe the typhoon is accumulating energy in the ocean, ready to go. The northern hemisphere has gradually entered the midsummer period, and typhoons around the world have also begun to enter the high-incidence period. We should make full preparations and precautions in the future.