The characteristics of the autumnal equinox are increased rainfall.

Characteristics of the Autumnal Equinox: The phenomenon of increased rainfall is mainly due to the climate characteristics of the Autumnal Equinox.

The autumnal equinox is one of the twenty-four solar terms and the middle node of autumn. At this time, the sun shines directly on the equator, the time between day and night is equal, and the temperature difference between day and night is large. This unique climate condition affects weather changes, resulting in a unique phenomenon of increased rainfall.

During the autumnal equinox, due to the increased temperature difference between day and night, better atmospheric condensation conditions are formed. At the same time, as surface temperatures drop, moisture in the atmosphere will condense into clouds and fog, producing more precipitation. Therefore, continuous rainy weather or heavy rain often occurs during the autumnal equinox, which has a certain impact on people's lives and agricultural production.

In addition, precipitation during the autumnal equinox is also affected by various factors such as geographical location and climate change. Precipitation conditions will vary in different areas, and some areas may experience drought or lack of rainfall. At the same time, global climate change will also have an impact on precipitation during the autumnal equinox. For example, climate warming will increase the water vapor content in the atmosphere, thereby increasing the probability of precipitation during the autumnal equinox.

The benefits of abundant rain during the autumnal equinox:

1. Drought relief: The rain before the autumnal equinox helps alleviate early drought, provides sufficient water for crops, and is beneficial to the growth of crops. Growth and development.

2. Increase soil moisture: Rainwater can increase soil moisture, allowing the roots of crops to better absorb water and nutrients, and promoting the growth of crops.

3. Improve soil quality: Rainwater helps dissolve fertilizers in the soil, provides nutrients for crops, and improves soil quality.

4. Promote biodiversity: More rain will increase the vitality and reproductive capacity of vegetation, helping to maintain ecological balance and biodiversity.

5. Alleviating the urban waterlogging problem: More rainwater can alleviate the urban waterlogging problem and reduce the pressure on the urban drainage system.

6. Promote the development of tourism: The autumnal equinox is a good season for tourism. More rain will increase the beauty of the natural landscape and attract tourists to come and watch.