Xiaoxue’s mind map

Xiaoxue’s mind map is as follows:

During Xiaoxue’s solar term, a relatively stable meridional circulation has been established in East Asia. There are often low pressures or troughs in Siberia, and when they move eastward, there will be Large-scale cold air moves southward, and large-scale windy and cooling weather will occur in eastern my country.

Xiaoxue

Xiaoxue is the 20th solar term in the twenty-four solar terms, the second solar term in winter, and it occurs on November 22 or 23 of the Gregorian calendar every year, when the sun reaches the yellow At 240° longitude. Light snow is a solar term that reflects precipitation and temperature. It is a solar term with high frequency of cold waves and strong cold air activities. The arrival of the light snow solar term means that the weather will become colder and the precipitation will increase.

Snow is the product of cold weather, so "light snow" is used to describe the climate characteristics of this solar term when "the climate is not too cold and the precipitation is not heavy". The "light snow" solar term is a solar term that reflects the changing trend of temperature and precipitation. It does not mean that there is a small amount of snow in this solar term. The "light snow" solar term is not necessarily related to the "light snow" in the weather.

During the light snow solar term, a relatively stable meridional circulation has been established in East Asia. There are often low pressures or troughs in Siberia. When it moves eastward, large-scale cold air will move southward, resulting in large-scale wind cooling. weather.

Knowledge expansion:

Light snow is a solar term that reflects precipitation and temperature. It is a solar term with high frequency of cold waves and strong cold air activities. The light snow solar term indicates that a relatively stable meridional circulation has been established in East Asia. If the Siberian low pressure or trough moves eastward, large-scale cold air will move southward, resulting in large-scale strong winds and cooling weather.

The light snow in the solar term is not necessarily related to the light snow in the weather. The "light snow" in the solar term has a different meaning from the "light snow" mentioned in the daily weather forecast. The light snow solar term is a climate concept that reflects the temperature and precipitation. The "light snow" in the weather forecast refers to snow with less intensity.

In meteorology, when it snows, the horizontal visibility distance is equal to or greater than 1,000 meters, the snow depth on the ground is less than 3 cm, and the 24-hour snowfall is between 0.1-2.4 mm, it is called "light snow" ".