Characteristics of winter

Winter is characterized by wet and cold, snowy, short days and long nights.

It is wet and cold in winter, and the greater the relative humidity of the air, the colder the heat dissipation feeling of the human body. Snow in winter is a unique scenery. When it snows, the air is fresh and unobstructed, and no animals crow. Cold is the biggest feature of winter, and it is easy to get sick and injured. Always keep warm and do a good job in health and disease prevention.

A feature of winter is snow. It's only in winter. It's white and cold, and no animals crow. The snow in the south is like small particles, and the snow in the north is like tearing cotton. It is big and dry. Snow can make the whole world bright, but it also brings inconvenience to travel and traffic, so you need to drive carefully.

Winter is characterized by short days and long nights, and the length of day and night is gradually shortened. The winter solstice is the longest night and the shortest day in the northern hemisphere. From the winter solstice, it entered a "cold day", and after the winter solstice, day and night became the same length.

Climatic characteristics

Beginning of winter said that since then, winter has traditionally started with "beginning of winter" in 24 solar terms. In early winter, the sun has reached 225 degrees of longitude, and the earth is at declination-16 19'. The height of the sun in the northern hemisphere has become smaller, the daytime has become shorter, and the amount of solar radiation obtained by the northern hemisphere has become less and less. However, there is still some energy due to the heat stored on the surface in the second half of this year.

During the period of Meng Dong (winter solstice and the beginning of light snow), when there is no wind, there is often a sunny, warm and comfortable "Xiaoyangchun" weather. There is a folk saying that it is "a spring in October". It is generally not very cold in early winter (Meng Dong) in some parts of the south, but with the passage of time, cold air frequently goes south and the temperature gradually drops. The northern region is very cold from winter to spring, and the climate change of several solar terms in winter is not obvious. Snow is the main feature of northern winter.