Three characteristics of beginning of winter.

Beginning of winter has three characteristics: the temperature drops and changes obviously; Winter and late autumn are prone to frost and fog; The temperature difference between north and south is getting bigger and bigger, and the weather is getting colder and colder.

1, the temperature drops and changes obviously.

With the strengthening of cold air, the cooling trend accelerates. Before and after winter, the precipitation in most areas of China decreased obviously, the air generally became dry, and the soil water content decreased.

2. In late autumn and winter, frost and fog are easy to appear.

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. After winter, the sunshine time will continue to shorten, the noon sun height angle will continue to decrease, and the solar radiation intensity will continue to weaken.

The temperature difference between north and south is getting bigger and bigger, and the weather is getting colder and colder.

After beginning of winter, the north of China has entered the cold season, while the south is still in late autumn or early winter. This has caused a great temperature difference between north and south. The climate in early winter has also changed from dry autumn to rainy and cold winter.

The custom of solar terms in beginning of winter

1, He Dong

Beginning of winter is one of the "four seasons and eight festivals" in ancient society, and it is a very important festival. On this day in early winter, the son of heaven held a ceremony to welcome winter in the suburbs, sent winter clothes to ministers, and pitied the widowed.

Step 2 brew yellow rice wine

It is a traditional Shaoxing wine-making custom to start brewing yellow wine in beginning of winter that day. The low water cooling temperature in winter can effectively inhibit the growth of miscellaneous bacteria and make the wine form a good flavor in the process of low temperature and long-term fermentation. This is the most suitable season for wine fermentation. Therefore, Shaoxing people regard beginning of winter to beginning of spring in the second year as the most suitable time to brew yellow rice wine, which is called "winter brewing" to pray for happiness.

Step 3 drink mutton soup

Drinking mutton soup in beginning of winter is a custom in southern China, and there is a saying that it gets warmer every year. Drinking mutton soup is to replenish physical strength and resist the cold.

Refer to the above content: Baidu Encyclopedia-beginning of winter