Traditional Culture Encyclopedia - The 24 Solar Terms - Cold dew in the twenty-four solar terms
Cold dew in the twenty-four solar terms
In ancient times, dew was considered as a sign that the weather turned cold. The solar term of the Mid-Autumn White Dew is "dew condensation and white". It is cold in season and autumn, and it is already "dew gas is cold and will condense" into frost. At this time, the temperature in all parts of our province continued to drop. The average daily temperature in the basin is below 20℃. Even in the areas along the Yangtze River, it is difficult for the mercury column to rise above 30℃, while the minimum temperature can be reduced to below 10℃. Except for a few valley lowlands, the five-day average temperature in the western Sichuan Plateau is generally lower than 10℃, which is winter according to the standard of four seasons climate division. The frost and snow in Wan Li are quite different from the autumn colors in the basin. During the perennial cold dew, the rainfall in the basin is also decreasing day by day. Most of the western part of the basin is about 20 mm, and the eastern part is generally about 30-40 mm. It rains frequently, day and night, which affects the emergence of "Sanqiu" and becomes a disastrous weather in our basin. The climatic characteristics associated with the rain in Mao Mao are: high humidity, more clouds, less sunshine and more cloudy days, and the number of foggy days has obviously increased since then. However, whether the autumn rain seriously affects the progress and quality of "Sanqiu" directly. To this end, on the one hand, we should use the weather forecast to harvest and sow in sunny days; On the other hand, according to local conditions, we should take various effective farming measures such as deep ditch and high compartment to reduce wet damage and improve sowing quality. In the plateau area, before and after the cold dew is one of the most serious seasons of snow damage. Snow jams traffic and harms animal husbandry production, so we should pay attention to prevention.
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