What are the things that symbolize autumn?

I. Symbol

1, fallen leaves: in autumn, most plant leaves turn yellow and curly, and fall from trees, which also means that after late autumn, winter is coming, and quite critical is often used to describe autumn; Wild geese fly south: Every autumn, the cold climate in the north is no longer suitable for geese to survive, so they fly to the warm south in droves.

2. Fruitful: Autumn is the harvest season, and many fruits are ripe. Oranges are one of the representative items of autumn fruits; Maple leaves turn red: maple leaves turn red from green in autumn, and naturally fall in late autumn, bringing many colors to nature; Mid-Autumn Festival: Mid-Autumn Festival is a synthesis of autumn seasonal customs, and its festival significance and cultural connotation have a long history.

Second, autumn.

1, autumn is one of the four seasons. Traditionally, China takes "beginning of autumn" in the 24 solar terms as the starting point of autumn. Entering autumn means that rainfall and humidity tend to decrease or decrease, and everything in nature begins to mature from lush.

2. At present, the four seasons are usually divided according to the average temperature of modern scholar Zhang Baokun. The index is that the average temperature is below 10℃ in winter, above 22℃ in summer, and 10~22℃ in spring or autumn. Autumn is a season of alternating hot and cold. Early autumn is still in the heat, but it hasn't come out yet. This is the hottest, wettest and sultry period of the year.

3. After late autumn, it is sunny during the day, cool and dry at night, with large temperature difference between morning and evening, less rain and insufficient water. Therefore, autumn dryness has become the main feature of late autumn. After entering autumn, in nature, everything begins to mature from lush. Its climate began to change from rainy and humid in summer to dry and rainy in autumn.

Third, phenology.

Autumn begins in autumn, which means that precipitation and humidity are at the turning point of the year and tend to decline or decrease; In nature, everything begins to grow from lush to rich and mature. Autumn is the harvest season, and many plants mature in autumn. In autumn, in nature, the qi of yin and yang begins to change, the yang is fading, the yin is getting longer, and the climate changes from hot to cold.