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On which day of the lunar calendar is the Bailu solar term characterized by temperature and climate

DailyBird Culture 2021-10-09 1 0

Du Fu once wrote in the poem "remembering my brother on a moonlit night" that "dew is white from tonight, and the moon is the brightness of my hometown." this describes the White Dew season. Even if I can't give up summer, I have to say goodbye to summer when I come to the solar term of White Dew. I look forward to seeing you again next year. What are the climate and temperature characteristics during the White Dew period? Let's learn about it.

白露节气是农历哪一天 气温与气侯特点

White Dew time

White Dew is the 15th of the twenty-four solar terms and the third solar term in autumn. White Dew is the end of Shenyue and the beginning of youyue in the main and branch calendar. The time point is from September 7 to 9 in the Gregorian calendar.

temperature climate characteristics

dew is a drop of water formed by the condensation of water vapor on the ground or near earth objects due to the decrease of temperature. Therefore, White Dew actually indicates that the weather has turned cold. In the climate of 24 solar terms in the basin of our province, Bailu has the obvious characteristics of rapid decline of temperature, beginning of continuous rain and sudden decrease of sunshine, which deeply reflects the seasonal transformation from summer to autumn. The average temperature during the perennial White Dew period in the basin is about 3 ℃ lower than that in summer, and the average temperature in most areas (5 days) has successively dropped below 22 ℃. According to the standard of dividing the four seasons by climatology, the time sequence begins to enter autumn. Autumn rain in the basin mostly occurs from Bailu to frost, most in the middle and lower reaches of Minjiang River and Qingyi River, and relatively less in the middle of the basin. Although the agricultural proverb "if there is too much white dew, take the road every day" can't make a weather forecast based on whether there is rain on this day, generally, there is often a period of continuous cloudy and rainy weather before and after the White Dew Festival; Moreover, since then, the rainfall in the basin has the characteristics of low intensity, many rainy days and continuous rainfall. Accordingly, the sunshine during the Bailu period in the basin decreased by about half compared with the summer, and the decreasing trend continued until winter. The above climatic characteristics in the White Dew season are unfavorable to the heading and flowering of late rice and the explosion of cotton and peach, and also affect the harvesting and drying of medium rice. Therefore, the agricultural proverb has the saying that "the White Dew weather is sunny and the grain is as white as silver". Only by fully understanding the climatic characteristics of Bailu and taking corresponding agricultural technical measures can we reduce or avoid the harm of autumn rain. On the other hand, we should also seize the rain to store water, especially the Bailu in the east of the basin is another solar term with more rainfall after Xiaoman and summer solstice, and don't miss a good opportunity.

Bai Lu waited three times for

geese to come: birds flew from north to south, big said Hong and small said wild geese.

and

black birds return: swallows and other migratory birds fly south to avoid the cold.

birds raise shame: hundreds of birds began to store dried fruit grain for winter.

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