The meaning of cold dew and frost

Cold dew and frost mean to describe the cold weather in autumn, and dew forms frost.

Cold dew is the seventeenth solar term among the twenty-four solar terms and the fifth solar term in autumn. Fight with each other; Longitude of solar arrival195; Gregorian calendar1October 7 -9 10 every year. Cold dew is a festival in late autumn and the beginning of the full moon in the dry calendar. Cold dew is a solar term reflecting the characteristics of climate change. When entering the cold dew, there is cold air going south, the temperature difference between day and night is large, and autumn dryness is obvious.

After the cold dew, the cold air in the north has a certain influence, and most parts of China are controlled by cold high pressure, and the rainy season is over. Controlled by cold and high pressure, it is warm during the day, cool at night and crisp in autumn during the day. From the climate characteristics, in the cold dew season, the autumn in the south is getting stronger, cool and cool, with little rain and dryness; The vast area in the north has shown the scene of winter. The traditional customs of cold dew mainly include enjoying maple leaves, eating sesame seeds, eating crabs and drinking autumn tea.

Meteorological change

Cold dew is a solar term reflecting the characteristics of climate change. After the cold dew solar terms, the days become shorter, the nights become longer, the sunshine decreases, the hot air slowly recedes, the cold gradually increases, the temperature difference between day and night is larger, and it feels a little chilly in the morning and evening. After the cold dew, the cold air in the north has a certain influence, and most parts of China are controlled by cold high pressure, and the rainy season is over.

Wan Li is clear, warm during the day and cool at night. Thunderstorms have disappeared in most parts of Chinese mainland. From the climate characteristics, in the cold dew season, the autumn in the south is getting stronger, cool and cool, with little rain and dryness; The northeast and northwest regions in the north show a scene of winter, with thousands of miles of frost and snow in Wan Li, which is quite different from the autumn colors in the south.

As the direct point of the sun continues to move southward in the southern hemisphere, the angle of sunlight in the northern hemisphere begins to tilt obviously, and the solar heat received by the ground is obviously reduced compared with that in summer. The influence of cold air's sphere of influence can sometimes extend to South China.