What are the climatic factors of light snow solar terms?

The climatic elements of light snow solar terms include precipitation, temperature and light.

1. Precipitation: In the light snow solar term, with the southward movement of cold air, water vapor condenses into clouds and falls to the ground in the form of rain, snow or sleet. This kind of precipitation not only moistens the earth, but also plays a positive role in plant growth.

2. Temperature: Light snow and solar terms, the temperature gradually drops, further aggravating the cold feeling. The drop of temperature has an important influence on the growth of plants, the activities of animals and people's daily life. People should add clothes to keep warm in time, and farmers also need to take corresponding measures to protect crops from the cold.

3. Illumination: In the light snow solar term, as the sun moves south, the sunshine time is obviously reduced and the sky becomes gloomy. This not only affects people's mental state, but also affects the photosynthesis of plants. The decrease of light time slows down the growth of plants, leaves wither gradually, plants turn yellow and enter hibernation.

Meteorological changes of light snow solar terms

Light snow is a solar term reflecting precipitation and temperature, and it is a solar term with high frequency of cold wave and strong cold air activity. Light snow solar terms indicate that a relatively stable meridional circulation has been established in East Asia. When the Siberian depression or trough moves eastward, there will be a large range of cold air going south, which will bring a large range of windy and cool weather.

There is no necessary connection between the light snow in solar terms and the light snow in the weather. The meaning of "light snow" in solar terms is different from that in daily weather forecast. Light snow solar term is a climate concept, which reflects the temperature and precipitation. The "light snow" in the weather forecast refers to the snow with less snowfall intensity. Meteorologically, when the horizontal visual distance is equal to or greater than1000m, the depth of snow on the ground is less than 3cm, and the snowfall in 24 hours is between 0.1-2.4mm, it is called "light snow".

Light snow solar terms do not necessarily snow. In fact, the solar terms with the largest snowfall in the whole year are not in light snow and heavy snow. For example, the solar term with the largest annual snowfall in the middle and lower reaches of the Yellow River and its vicinity is neither "light snow and heavy snow" nor "slight cold and severe cold", but a "rainy" solar term in spring.

Reference to the above content: Baidu Encyclopedia-Xiaoxue