Is the increase in rainfall a phenological feature of the autumnal equinox solar terms?

The increase of rainfall is not the phenological feature of the equinox solar terms.

The phenological characteristics of solar terms in the autumn equinox are mainly manifested in thunder rumbling, insect singing and water drying.

1, the thunder began to stop: the ancients thought that the thunder was because the yang was strong, and after the autumnal equinox, the yin began to flourish, so the thunder stopped. Therefore, the thunder gradually decreases, which is also an important feature of the autumnal equinox solar terms. In meteorology, lightning is an atmospheric discharge phenomenon caused by meteorological conditions. Usually, thunder occurs in spring and summer. With the arrival of autumn, the temperature gradually drops, the moisture in the air decreases, the clouds gradually become thinner, and the phenomenon of thunder gradually decreases.

2. Spoiler: After the autumnal equinox, some insects unearthed at the vernal equinox will return to the soil one after another to prepare for the winter. This is also a major change in the biological activities of the autumn equinox and solar terms. In biology, this phenomenon is called "hibernation", which is a survival strategy evolved by some animals to adapt to the cold winter. These small animals will dig caves underground and store food and water to spend the long winter.

3. Water begins to dry up: In the autumn equinox, the water vapor is not as abundant as in summer, and it will gradually dry up. This will cause the air humidity to gradually decrease and the weather to gradually become dry. In meteorology, the amount of water vapor is influenced by many factors, such as temperature and humidity. With the arrival of autumn, the temperature drops gradually, and the water in the air decreases, so the water vapor also decreases gradually and the weather becomes dry. This phenomenon is also beneficial to the harvest and storage of some autumn crops.

Main phenological characteristics of solar terms in vernal equinox;

1. Spring grass germination: During the vernal equinox, the temperature rises and the rain increases, and various plants begin to sprout and grow. Especially the grass on the grass began to turn green, showing great vitality. This is because the temperature rises gradually in spring, the nutrients and water in the soil are gradually suitable for the growth of plants, and there is more rainfall in the spring equinox, which is beneficial to the growth and development of plants.

2. Peach blossoms are in full bloom: The spring equinox season is also the period when peach blossoms are in full bloom. In the southern region, peach blossoms are the most vivid at this time, and pink flowers are dotted on the branches, attracting many tourists to watch. This is because the spring temperature is suitable and the sunshine is sufficient, which is conducive to the growth and flowering of flowers. At the same time, the blooming of peach blossoms also symbolizes the arrival of spring and the vibrant spring scenery.

3. Swallows return: During the spring equinox, the temperature is suitable, and swallows return from the south and begin to breed. The return of swallows symbolizes the arrival of spring and the vibrant spring scenery. This is because swallows are migratory birds. They fly to the south in winter and fly back to the north to breed in spring. The return of swallows also indicates that the weather is getting warmer and the earth is beginning to recover.