Which of the three seasons is frost fall divided into:

The three seasons of frost fall are:

The first season is when jackals are sacrificed to the beasts, the second season is when grasses and trees are yellow and fall down, and the third season is when stings and insects are salty and swooping down.

The first is a sacrificial animal: it means that jackals start to catch prey at this time of the festival, and the extra food is piled up wherever it is, which looks like a sacrificial animal.

Second Waiting for the Yellowing of Grass and Trees:The meaning is that the grass is withered, the leaves are falling and the trees are yellowing as the fall passes. The climate is getting cold, and winter will come soon.

The third wait for the stinging insects: meaning that the stinging insects are hiding in their holes at the time of the frost.

Knowledge Expansion

Frostfall is one of the twenty-four solar terms, when the weather gets colder and frost begins to form. Frost is usually on October 23rd of the Gregorian calendar every year, when the sun reaches 210 degrees of the yellow meridian for the frost in the twenty-four solar terms. Frost is the last solar term of the fall season, and is the transition from fall to winter.

There is a lot of heat dissipation on the ground in the evening of autumn, and the temperature plummets to below 0 degrees Celsius, so the water vapor in the air condenses directly on the ground or plants to form tiny ice needles, some of which become hexagonal frost flowers, white in color and loose in structure.

Frost is water gas condensation, water gas how to condense into frost? The Southern Song poet Lu Benzhong wrote in "Nan Ge Zi - Travel Thoughts", "The post invades the slanting moon, and the stream bridge is full of late frost." Lu You wrote in "Frosty Moon", "The withered grass is white with frost, and the moon's shadow is new in the cold window." It shows that frost appears on a clear moonlit night in autumn.

There are no clouds in the autumn night, the ground as uncovered by the quilt, a lot of heat dissipation, the temperature plummeted to below 0 ℃, not much water vapor by the ground will condense in the creeks, bridges, leaves and soil, the formation of fine ice needles, and some of them become hexagonal frost flowers. Frost, can only be formed on a sunny day, people say "thick frost fierce sun" is this reason.

The frosty season means that the weather is getting colder, and frost is beginning to fall. In the southern part of the latitude of the south, the average temperature is about 16 degrees Celsius, and the date of the first frost there are still three seasons. In the river valley area of southern China, it will not see frost until mid-winter.

Of course, even in the same latitude, due to the altitude and topography of the different, advective layer of air temperature and humidity there are differences in the period of the first frost and the number of frost days will not be the same. At the time of frost, the cool autumn wind has blown to the flower city of Guangzhou. The average temperature in the northern northeast, eastern Inner Mongolia and most of the northwest has been below 0 ℃.