Describe the phenological characteristics of slight cold solar terms
As one of the 24 solar terms, slight cold marks the official arrival of winter. At this time, nature presents unique phenological characteristics, which not only reflects the change of climate, but also reflects the tenacity and tenacity of life.
Knowledge expansion
It's warm in winter in the south of China. In the dead of winter, frost and snow attack and often freeze. The lowest temperature is around-10C, while the lowest temperature in northern South China is rarely below -50C, and the low temperature below 00C in southern South China is even rarer.
The coldest area in the middle of winter in China is the northern part of Heilongjiang, with the lowest temperature around -40℃, which makes it dripping into ice. The low-altitude valley is the warmest place in the middle of winter in most parts of southern China. The average temperature in 65438+ 10 is about 12C, and only a few teenagers may have a low temperature below 0℃, and the inversion effect is very significant, so tropical fruits such as bananas and mangoes can grow well.
During the slight cold solar term, the East Asian trough developed the strongest and most stable, the Mongolian cold high and Aleutian low also reached the strongest and most stable, and the ridge scale of the westerly trough reached the maximum, which matched the strongest westerly intensity. The cooling process of cold air is frequent in the slight cold season, but few of them reach the cold wave standard.
Words: "Sanjiu" is mostly 65438+1October 9 to 17, which is also within the slight cold solar terms. But this is "cold on March 9". This is just a general rule. In a few years, a bad cold may be colder than a mild one. In the winter of 1975 that people still remember, the solar term with the lowest temperature was actually heavy snow.
The lowest temperature in winter in the south is not low, which is beneficial to production and is also suitable for developing diversified businesses. "Being ordered not to move, I was born in the south of China. Generally speaking, the minimum temperature for growth is not lower than minus 5C, and the annual temperature is higher than 15 C, which can be met in most parts of South China, and there are almost everything in subtropical plants. Only in this way, the unique climatic conditions should be a very important factor.