On the morning of August 13, it can be seen from the Fengyun-4 satellite cloud map that there are large areas of clear sky in the central and western regions of my country and the eastern sea area today. The clear sky area at sea is the subtropical high pressure that has collapsed and retreated recently, while the clear sky area on land is the strong continental high pressure. Between the two high pressures, there are dense precipitation clouds, which has led to increased rainfall in many places in the north and south. For the Yangtze River Delta and other places in the south, the appearance of precipitation has alleviated the recent continuous high temperature. However, under the control of the continental high pressure, the high temperature area has shrunk to the west, and the heat in Hubei, Chongqing, Sichuan and other places has continued. The hottest place in the country will move to Chongqing.

1. Super blue skies over a wide area are coming

Recently, the weather in northern my country has suddenly changed, showing us an unprecedented "super blue sky". Just after the beginning of autumn, this refreshing weather makes people sigh: the solar terms created by our ancestors are really scientific!

In mid-August, a combination of a westerly trough and a cold vortex swept across northern my country. This "golden partnership" brought about earth-shaking changes in the weather in central and eastern China. Especially in North China and Northeast China, the cold vortex strongly induced temperatecyclone, causing some areas to be hit by heavy rain or even torrential rain. Beijing experienced quite intense rainfall last weekend, which was simply "flooding the Jinshan Mountain".

The southern region is also not willing to be left out. Under the dual pressure of the westerly trough and the cold vortex, the subtropical high pressure has finally lost its former "arrogance". The heat wave in the Jiangsu, Zhejiang and Shanghai areas has gradually receded, and the once suffocating feeling of heat has gradually dissipated with the arrival of cold air.

What is even more amazing is that the strong northerly winds brought by the cold vortex, combined with the "dust-cleansing" effect of the previous rain, made the air quality in the Beijing-Tianjin-Hebei region reach an "unbelievable" level on August 12. According to monitoring data, the PM2.5 concentration in Beijing dropped to 1 that afternoon, and the PM10 concentration was only 5. Such air quality is rare worldwide! A Beijing netizen observed that he could even see Xinglong Wuling Mountain 180 kilometers away from the city, and such visibility was refreshing.

2. It will definitely be cool in the north when the Beginning of Autumn arrives!

After the cold vortex, as the strong north wind continues to blow, the air quality and visibility in the North China Plain will continue to remain high. Under the blue sky and white clouds, many photography enthusiasts are ready to record this beautiful "grassland blue".

The Beginning of Autumn has always been considered the beginning of autumn. Although the temperature is still high, with the arrival of the cold vortex, North China has indeed ushered in clear and crisp autumn weather. This refreshing air and high-visibility blue sky make people sigh that the solar terms of our ancestors really make sense. After the Beginning of Autumn, the weather is indeed gradually becoming comfortable and pleasant, which is also in line with the prediction of the solar terms.

Interestingly, the combined effect of the cold vortex and the westerly trough also showed us the power of atmospheric circulation. In the past two days, the weather system formed by the westerly trough and the cold vortex is like a "superhero in the meteorological world", sweeping away the previous heat and humidity and bringing extremely comfortable climatic conditions. In the next few days, as the fresh air from the grassland continues to seep down, this refreshing and pleasant weather will appear frequently in North China.

In general, this weather change has undoubtedly once again confirmed the scientific nature of my country's traditional solar terms. The combined attack of the westerly trough and the cold vortex not only freed the northern region from the trouble of high temperatures, but also brought excellent air quality and visibility. This kind of blue sky and white cloud weather not only makes people feel happy, but also adds a touch of bright color to the upcoming autumn.

In the future, we may be able to expect more similar weather changes. After all, the combination of meteorology and the wisdom of our ancestors can indeed bring us more surprises. And this kind of surprise is the result of the interaction between nature and human wisdom. Whether it is past experience or modern technology, we can draw strength from it to make our lives better.