What are the climatic characteristics of beginning of winter in the 24 solar terms?

Winter began quietly. As one of the twenty-four solar terms, beginning of winter solar term is the first solar

What are the climatic characteristics of beginning of winter in the 24 solar terms?

Winter began quietly. As one of the twenty-four solar terms, beginning of winter solar term is the first solar term in winter, which inherits the handover of autumn and winter. Next, let me show you the climate characteristics of solar terms in beginning of winter.

Climatic characteristics

Tropical cyclone, a spent force

According to statistics, there are 2-3 tropical cyclones in June165438+1October every year. In particular, cyclones generated in the northwest Pacific may develop into typhoon intensity. In the past 55 years, there have been 1 1 tropical cyclones landing in China's coastal areas in1month, mainly in Taiwan Province Province, Guangdong Province and Hainan Province. If zonal circulation prevails in mid-latitude, tropical cyclones are more active, and if meridional circulation prevails in mid-latitude, that is, cold air is stronger, typhoons are not easy to occur.

Second, South China, North and South China, Autumn and Summer

In northern South China during beginning of winter, even if the cold wind sweeps away, the temperature will rise rapidly. When there is no wind on a sunny day, it is often said that "October is sunny and there is no wind to warm". It is often winter here in 65438+February.

South China, Taiwan Province Province and Hainan Island to the south, 165438+ 10 has not yet entered winter. However, the temperature in June 5438+065438+ 10 is not very high, and the highest temperature is generally below 30℃. In addition, it is not excluded that there is a strong cooling due to the influence of strong cold air, but it is rare in recent years.

Third, frost and fog are easy to appear in winter and late autumn.

In normal years165438+1early October, frost will appear one after another from the Qinling Mountains in the north, the western and southern parts of Huanghuai, and the northern part of Jiangnan in the south. In the cold year165438+1mid-October, the first frost will also appear north of Nanling.

165438+ 10 In the north of October, as the front of cold air moved out of the field, the cold air mass behind the front began to change to the warmer side. If there is no follow-up cold air supplement, after a few days, although the temperature rises, the air quality gradually deteriorates. Especially in big cities, the water vapor accumulated in the atmosphere combines with pollution particles to form smog or dense fog, which affects people's health and traffic execution. Water vapor conditions in the southwest and south are better than those in the north. If the temperature is low in the morning, there are often patches of fog.

What are the 24 solar terms?

Because the lunar calendar in China is a kind of "yin and yang calendar", which is based on the execution of the sun and the moon, it cannot fully reflect the execution cycle of the sun. However, China is an agricultural society, and agriculture needs to strictly understand the execution of the sun, and farming is carried out entirely according to the sun. Therefore, the "twenty-four solar terms" that reflect the solar execution cycle alone are added to the calendar as the standard for determining leap months.