Why is the precipitation in Beijing decreasing in recent years?

Global warming, flooding in the south and drought in the north is the trend. In summer, the subtropical high rises northward again and again, resulting in drought and little rain in Beijing. In winter, the cold air is weak and cannot form precipitation clouds, so Beijing is dry all the year round. Now the Yongding River, the mother river of Beijing, has mostly dried up, and the desert is close to Beijing.

According to the latest statistics of the Climate Center of Beijing Meteorological Bureau on 20 19, the precipitation in Beijing Plain has been 207.0mm since the summer, which is 70% more than normal and 90% more than last year, which is the highest in the same period of last decade.

The relevant person in charge of the Climate Center of Beijing Meteorological Bureau told the reporter that since June 1, the weather and climate in Beijing has been characterized by excessive precipitation, low temperature and thunderstorms and strong winds. There are also local heavy rains in the afternoon to night on June 13 and June 16. Due to the heavy rainfall intensity, a few low-lying sections were flooded, which once "added chaos" to urban traffic.

Extended data:

June to August is the rainy season every year.

Because Beijing belongs to a typical northern temperate semi-humid continental monsoon climate, it is hot and rainy in summer and cold and dry in winter. The seasonal distribution of annual precipitation is very uneven. 80% of the annual precipitation is concentrated in June, July and August in summer, and there are heavy rains in July and August.

The reason is that the sun's altitude angle increases in summer, and the days are long and the temperature is high. Affected by the Pacific subtropical high, the summer monsoon is prevalent, mainly southeast wind, with small wind, wet and rainy. The southeast monsoon blowing from the tropical ocean brings abundant precipitation.

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