Climatic characteristics of solar terms in autumnal equinox

The climatic characteristics of the solar terms in the autumnal equinox are that when it thunders, sounds begin to be heard, the second time is insect sting, and the third time is water drying.

1, the first thunder stops.

The ancients thought that it thundered because the yang was strong and the yin began to flourish after the autumnal equinox, so it stopped thundering.

2. The second blank household waiting for insects

Some insects unearthed at the vernal equinox will return to the soil after the autumnal equinox to prepare for winter.

3, third-class water dry.

The water vapor is not as abundant as in summer, and it will start to dry up gradually, so we will feel the air is getting drier and drier.

Thunder is not only the end of the summer heat, but also the beginning of the autumn cold; Because of the cold weather, dormant insects began to hide in the hole and sealed the hole with fine soil to prevent the cold from invading; Because of the dry weather, the water vapor evaporates quickly, the water volume of lakes and rivers decreases, and some swamps and puddles dry up.

Meteorological change characteristics of autumnal equinox

According to the lunar calendar, "beginning of autumn" is the beginning of autumn and ends with "the first frost". The "vernal equinox" is exactly half of the 90 days from beginning of autumn to the first frost. After the autumn, the dryness of the sky and the dryness of the things gradually appeared.

Since the autumnal equinox, the climate has three main characteristics. Direct sunlight continues to move from the equator to the southern hemisphere, and the phenomenon of short days and long nights in the northern hemisphere will become more and more obvious. The days will get shorter and the nights will get longer (until the winter solstice reaches the longest night and the shortest day). The temperature difference between day and night will gradually increase, and the amplitude will be higher than 10℃. The temperature drops day by day, getting colder every day, and gradually entering the late autumn season. The situation in the southern hemisphere is just the opposite.