Knowledge points about winter solstice

The knowledge about the winter solstice is as follows:

1, meaning winter solstice

The winter solstice is the shortest day and the longest night in a year, usually between 65438+February 2 1-23 every year. On this day, the sun almost directly shines on the Tropic of Capricorn, marking the official start of winter.

2, the custom of winter solstice

In China, the winter solstice is an important solar term, and there are many traditional customs related to it. For example, people will eat traditional foods such as jiaozi, glutinous rice balls and mutton to celebrate the winter solstice. In addition, some places will hold sacrificial activities to pray for a bumper harvest and family safety in the coming year.

3. Symbolic significance of winter solstice.

The solstice in winter is not only a sign of the weather, but also a symbol of reunion and gratitude. On this day, family members get together to celebrate the festival and thank their families for their efforts and care in the past year.

4. Literature and art from winter solstice

In ancient literature, the solstice in winter is often an important theme. Many poets and writers express their feelings and thoughts about the winter solstice through poems, essays and other forms. In addition, the winter solstice is also the source of inspiration for some traditional art forms, such as paper-cutting and painting.

5. Scientific significance of winter solstice

From a scientific point of view, the winter solstice is the result of the earth's revolution around the sun. On this day, the angle between the earth's axis and the sun reaches the maximum, which makes the height angle of the sun in the northern hemisphere the smallest, resulting in the shortest day time and the longest night time.

Climatic characteristics of winter solstice

I. Temperature changes from winter solstice to Sunday

Winter solstice is one of the 24 solar terms, which usually occurs between 65438+February 2 1-23 every year. On this day, the sun in the northern hemisphere has the lowest height and the shortest sunshine time, so the temperature is relatively low. In China, the winter solstice is one of the coldest periods of the year, and the temperature often drops to the lowest point of the year.

However, due to China's vast territory and abundant resources, the winter solstice temperatures in different regions are also different. Generally speaking, the average temperature in the north is lower than that in the south during the winter solstice, because the snow and ice in the north are thicker, which makes the winter in the north colder.

Second, the characteristics of winter solstice precipitation

During the winter solstice, due to the temperature drop, the water vapor in the air often condenses into snowflakes, which leads to an increase in snowfall. Especially in the northern region, there is often heavy snow during the winter solstice, which has a certain impact on transportation and people's lives.

In the south, although the temperature is relatively high in winter solstice, rainy weather may occur due to more water vapor. Therefore, during the winter solstice, people need to pay attention to keep warm and prevent slippery to cope with possible snowfall and rainy weather.