Characteristics of cold dew solar terms

Characteristics of cold dew solar terms

The characteristics of cold dew solar terms, the twenty-four solar terms are also very important festivals in China. The solar term temperature of cold dew will gradually drop, and the cold dew weather will be particularly cold. Many people don't know what the characteristics of solar terms are. Many people don't know the characteristics of cold dew solar terms? Let's analyze and discuss together!

Characteristics of Cold Dew Solar Term 1

What are the solar terms characteristics of cold dew?

The sudden drop in temperature is a feature of the cold dew solar terms. It is common for the temperature to drop by 8℃ and 10℃ after the autumn rain brought by a strong cold air. However, most stormy weather does not last long (except West China). Controlled by cold and high pressure, it is warm during the day, cool at night and crisp in autumn during the day.

On the morning of the cold dew solar term, we can all see the crystal dew on the leaves of plants, but the dew is already very cold at this time. Some friends in the south may ask why there is no dew in the morning in the south. There is a simple reason. Twenty-four solar terms come from the Yellow River Basin. At this time, the temperature in the south of Jiangnan is still high, so it won't be too cold.

The solar term from the cold dew to the back of the first frost is only a short 15 day, but it is a period of time in a year when the temperature drops rapidly. After a cold air, it is common that the daily average temperature drops by 8℃ and 10℃. Therefore, this season is the turning point of climate change in many parts of China.

"Cold dew" refers to the turning point from cold to cold in a year. With the arrival of cold dew, most parts of China will turn cold, and the northeast and northwest regions have entered or will soon enter winter, with less rain. In addition to the perennial snow on the Qinghai-Tibet Plateau, it has generally begun to snow in the northeast and northern Xinjiang.

Thunderstorms have disappeared in most parts of Chinese mainland, and thunder can be heard only in parts of Yunnan, Sichuan and Guizhou. The precipitation in June 5438+ 10 in North China is generally only half or less than that in September, while in Northwest China it is only a few millimeters to more than 20 millimeters. Drought and lack of rain often bring difficulties to timely sowing of winter wheat and become one of the main limiting factors for high yield of dry land wheat.

Characteristics of cold dew solar terms II. Weather characteristics of cold dew

During the cold dew, the weather and climate have the following characteristics:

The temperature dropped rapidly.

The sudden drop in temperature is a feature of the cold dew solar terms. It is common for the temperature to drop by 8 ~ 10℃ after the autumn wind and autumn rain brought by a strong cold air, but most of the stormy weather does not last long (except Huaxi). Controlled by cold and high pressure, it is warm during the day, cool at night and crisp in autumn during the day.

The average temperature distribution varies greatly.

From June 5th to 10, the regional difference of the average temperature distribution in China is obvious. The average temperature in most parts of South China is above 22℃, and it is even higher in Hainan, which is above 25℃, and it has not yet come out of summer. Generally, it is 15℃~ 20℃ in Jianghuai and Jiangnan, and 8 ~ 16℃ in Southeast China, North China and Huanghuai. At this time, the average temperature in parts of northwest and north-central northeast has reached below 8℃, and the average temperature in some plateau areas of Qinghai Province is even below 0℃. There is a proverb in Guangdong: "Cold dew spans three dynasties, and you have to find a bridge after crossing the water", which means that the weather is getting colder, but you can't wade across the river or go barefoot as before. It can be seen that during the cold dew period, people can obviously feel the seasonal changes. More regions and more people began to use the word "cold" to express their feelings about the weather.

The custom of cold dew solar terms

Frostbite prevention

There is a saying in the agricultural proverb: "He is afraid of cold dew, and he is afraid of poverty when he is old." Before and after the cold dew, the temperature is low. At this time, the crystal white dew gradually turned into frost. Before and after the cold dew, the crops in the field are most afraid of being attacked by the cold wind, so farmers should pay attention to prevent freezing injury in the field.

Autumn carving edge

At this time, if the sun is not strong in summer, it is difficult to cross the deep water, so both fish and crabs are moving to warmer shallow water, which is a good time to go fishing.

Ornamental red leaves

Seeing red leaves in Xiangshan during the cold dew season has long been a traditional habit of Beijing residents and the highlight of autumn travel. Autumn wind is rustling and yellow leaves are red. The continuous cooling after the cold dew made the maple leaves in Beijing red. In autumn, the Xiangshan forest is dyed, and the red leaves on the mountain are as beautiful as Xiajin and picturesque.

Hongye, scientific name Huang Shao. It's an ornamental tree, mainly looking at leaves. It is favored by scholars of all ages. A was first found in Sima Xiangru (Shanglin Fu) and found all over the country. In fact, when people watch the red leaves, not only Huang Hu, but also Ubuntu, Feng Dan, Torch, Red Leaf Plum and other tree species. Stroll along the winding path and look at the hillside. You will see clusters of red leaves. Colorful scenery.

Characteristics of cold dew solar terms 3 The main feature of cold dew solar terms is that the temperature drops gradually.

In the cold dew season, Nanling and the vast area to the north have entered autumn, the northeast has entered late autumn, and the northwest has entered winter or is about to enter winter.

The temperature drops gradually. White dew, cold dew and first frost all indicate the phenomenon of water vapor condensation, and cold dew is the transition from cold to cold. At night, looking up at the starry sky, you will find that the season of the starry sky changes, and the "Big Mars" (Scorpio Antares), which represents the midsummer, has set in the west. We can vaguely hear the footsteps in winter.

At this time, the temperature in most parts of South China continued to drop. The average daily temperature in South China is less than 20℃. Even in the areas along the Yangtze River, it is difficult for the temperature to rise above 30℃, while the minimum temperature can drop below 10℃. Except for a few valley lowlands, the five-day average temperature in the northwest plateau is generally lower than 10℃, which is already winter according to the standard of four seasons climate division. First frost store, a thousand miles away, is quite different from the autumn scenery in South China.