When is the solstice in winter? 20 19 when is the winter solstice?

Legend has it that Chu Shuang was ruled by a fairy, and the world needed to be warm and cold. This is a natural law, and the first frost is really beautiful. When the first frost comes, will you make a handwritten newspaper? I believe many students will have such homework. Are you worried that you can't find the content? Here's a little bit about Frost's first manuscript. Please come and refer to some!

What is the first frost? What does the first frost mean? The first frost solar term means that the weather is getting colder and the first frost appears. The first frost means that the weather gets cold and begins to frost. It is the eighteenth of the twenty-four solar terms. The first frost is the last solar term in autumn when the sun is at longitude 2 10 on the 23rd or 24th of October in the solar calendar.

The first frost refers to the first frost. "Twenty-four solar terms" said: "In mid-September, the gas disappears and condenses into frost." When the temperature drops below 0 degrees, the water vapor in the air condenses into white crystals on the ground, which is called frost. At this time, the first frost generally appears in the Yellow River Basin in China. Most areas are busy planting crops such as wheat, and plants that are not hardy will stop growing, showing a scene of late autumn, which is a good time to enjoy maple leaves.

Frost is a white crystal produced by condensation of water vapor in the atmosphere on the ground and objects. Frost means that the lowest ground temperature is below 0, and crops may suffer from freezing injury. The first frost in autumn is called the first frost, which is the beginning of a year's frost period. China has a vast territory and complex terrain, and the first frost dates vary greatly from place to place. It's always early in the north and late in the south, early in the west and late in the east. The first frost in the northeast plain appears in late September, and the first frost in some years appears in early September or late August. The first frost appeared in North China Plain in June+10/October, 5438. The first frost appeared in the Yellow River basin around the first frost. The first frost in Jianghuai and Jiangnan areas appeared in mid-June165438+ 65438+in early February. There is little frost south of Nanling. The places with the most frost days in China are Zheng Duo County in the east of Yushu Tibetan Autonomous Prefecture in Qinghai and Qingshui River in the south of Wulanchabu League in Inner Mongolia Autonomous Region, with an average annual frost days of 245.6 days.

As far as the first frost time is concerned, the first frost in all parts of China is gradually delayed from north to south and from mountainous areas to plains. Except for areas with frost all the year round, the northern part of Daxinganling is the first frost, usually at the end of August; By September, the first frost appeared in most parts of Northeast China, Inner Mongolia and northern Xinjiang. At the beginning of 10, frost flowers appeared in Shenyang, Chengde, Yulin, Qamdo and Lhasa. /kloc-In early October, frost can be seen in Shandong Peninsula, Zhengzhou, Xi and northwest Yunnan. In eastern China, about 30 degrees north latitude, Hanshui River Basin and Yunan Province, about 2 degrees north latitude, frost will not be seen until 65438+early February; Xiamen, Guangzhou, Baise, Simao and Chushuang are 65438+ after Chinese New Year1early October.

In the first frost season, the cold air in the north becomes stronger and the activities are frequent. The average temperature in most areas of Northeast China, East Inner Mongolia and Northwest China has been below 0, the soil has frozen, and the winter crops have stopped growing and entered the wintering period. North China is in the period of soybean harvest and wheat late sowing; South China is in the peak season of "Sanqiu", the average temperature is around 16, and there are three solar terms before the first frost day.

What is frost? What is frost? As we know, frost is white loose ice crystals formed by direct condensation of water vapor in the air on or near the ground. In the first frost season, plants that are not hardy have stopped or will stop growing. Frost refers to that in the growing season, the surface temperature of soil or the temperature near the plant canopy drops below 0 in a short time at night, and the surface temperature of plants drops rapidly, so that the water in plants is frozen, the metabolic process is destroyed, and cells are squeezed by ice cubes, thus causing harm. When frost occurs, it is not only frost that hurts plants at low temperature. If the relative humidity of the air is low, "white frost" may not be seen, or frost may appear. Usually, people call the frost without "white frost" black frost.

Frost usually occurs in cold, sunny, partly cloudy, cloudless or breezy nights. Low-lying valleys, sandy soil and dry loose soil are easy to form heavy frost. Sometimes the lowest temperature in the weather forecast is 2 degrees. At 1, frost may also occur. This is because the lowest temperature in the weather forecast refers to the air temperature in the shutters, while frost refers to the low temperature phenomenon that the surface temperature of the ground or near-earth objects is below zero. The ground temperature is usually 2℃ lower than that of shutters. Autumn frost is called the first frost, and the first frost is the first frost. The first frost has a great influence on autumn vegetables and grain, so it is necessary to do a good job of frost prevention. Firewood can ignite smoke, cover it with straw and film, and water it to prevent frost.

We can't change the natural weather, we must learn to adapt to it, and the environment in which I live is the same. We need to know how to integrate into the group, so as to get the attention of others. The first home game of the first frost is coming, so pay more attention to life and beware of catching a cold.