There are four ways to write the variant characters of Qiu, they are: 駧靝, 秌, and 琐.
"Qiu" means autumn, and has been developed to express the time of year, such as "Long Live Qianqiu" that appears in large numbers in ancient literature.
The characteristics of autumn are: the temperature gradually drops, the autumn wind blows coolly, the wild geese fly south, the branches are full of fruits, and the fields are golden.
Autumn is the harvest season, and the temperature drops significantly compared to summer, and the leaves of many plants will gradually change color, wither, and fall, leaving only the branches. From the perspective of temperature, autumn will Weather conditions may be cold and rainy, or dry and cool.
The four seasons are divided according to the climatic average temperature of modern scholar Zhang Baokun. The indicator is that the period when the average temperature is below 10℃ is winter, the period above 22℃ is summer, and the period between 10 and 22℃ is spring and autumn respectively. .
The autumn standard of climatological average temperature adopted in meteorology is: after the heat, autumn is entered when the five-day average temperature stabilizes below 22℃, and autumn ends when it is below 10℃ (average temperature: the same The average temperature of the four time periods within the day at 0:00, 6:00, 12:00 and 18:00), entering winter.
Autumn climate:
Autumn has entered since the beginning of autumn. Entering autumn means that precipitation, humidity, etc. are at a turning point in the year, tending to decline or decrease; in nature , all things begin to grow from luxuriant growth to fruitfulness and maturity. Autumn is harvest season, and many plants mature in autumn.
In the autumn season, in nature, the yin and yang qi begin to change. The yang qi gradually retreats and the yin qi gradually grows. The climate turns from hot to cold. All things grow with the cold and gradually decline. This is the relationship between heat and cold. Alternating seasons. As the temperature gradually drops, the leaves of many deciduous perennial plants will gradually change color, wither, and fall, leaving only branches to survive the winter.
Annual herbaceous plants will reach the end of their lives and wither to death. Seasonal transition covers many aspects of climate characteristics. It would be inaccurate to use temperature alone as the criterion for determining the onset of autumn. The most obvious change in autumn is that the leaves of grass and trees turn from lush green to yellow and begin to fall, and crops begin to mature.