What is the representative color of autumn?

Autumn is the third of the four seasons, and it is the transition season from summer to winter. The lunar calendar is from beginning of autumn in July to beginning of winter in September, the solar calendar is from 9 to 1 1, and the astronomical cycle is from the autumnal equinox to the winter solstice. The phenological criteria studied by meteorologists are: after the summer heat, it is considered as autumn when the average temperature for five days is stable below 22 degrees, and it ends when it is below 10 degrees. There are six solar terms in autumn, namely beginning of autumn, Chushu, Bailu, Autumnal Equinox, Cold Dew and First Frost. The temperature will gradually drop in autumn, but it is generally slower than in winter. Due to the difference of dry and wet conditions, there will be cold and rainy weather conditions or dry and cool weather conditions in different regions. In the cold late autumn, due to the large temperature difference between day and night, the water vapor transpiration during the day will condense at night, either dew or frost.

Alias of autumn:

High autumn (meaning crisp autumn)

Su Qiu? Bai Qiu (Mid-Autumn Festival in Five Elements Thought = Gold = White)

Bai Di (the god in charge of autumn)

Autumn (autumn = gold; Harvest? Color of plants)

Sanqiu (early autumn, mid-autumn and late autumn)

Nine autumns (autumn 90 days = three months)

Solar terms:

? There are six solar terms in autumn, namely beginning of autumn, Chushu, Bailu, Autumnal Equinox, Cold Dew and First Frost.

Meteorology:

? The temperature will gradually drop in autumn, but it is generally slower than in winter. Due to the difference of dry and wet conditions, there will be cold and rainy weather conditions or dry and cool weather conditions in different regions. In the cold late autumn, due to the large temperature difference between day and night, the water vapor transpiration during the day will condense at night, either dew or frost.

Astronomy:

? In autumn, the direct point of the sun gradually moves south from the northern hemisphere, passes through the equator after the autumnal equinox, and the sun directly shines in the southern hemisphere. Seen from the northern hemisphere, the angle of the sun gradually becomes lower, and the gap between day and night becomes smaller. At the autumnal equinox, the length of day and night is equal. In autumn, the distance between the earth and the sun is from far to near. Seen from the ecliptic plane, the sun is on the background of Leo, Virgo and Libra.