Introduction to the phenological phenomena of Beginning of Winter. What do the three phenological phenomena of Beginning of Winter mean?

Introduction to the phenological phenomena of Beginning of Winter. What do the three phenological phenomena of Beginning of Winter mean?
Speaking of the Beginning of Winter, I believe everyone is familiar with it. So, let’s take a look at the introduction to the Beginning of Winter’s three phenological elements. What do they mean? The good and bad days in the lunar calendar are different every day, and the things suitable for doing are also different. Do you want to know whether the days in October of the lunar calendar in 2021 are good? Please click on Mr. Shui Mo’s special topic on October of the Lunar Calendar to view it!

Introduction to the phenological phenomena of Beginning of Winter. What do the three phenological phenomena of Beginning of Winter mean?

The ancient Chinese divided the beginning of winter into three phases: "The first phase is when the water begins to freeze; the second phase is when the ground begins to freeze; the third phase is when pheasants enter the water and become clams."
Introduction to the first phase of water freezing:
At this point, the water is already capable of freezing into ice;
Introduction to the second phase of ground freezing:
The ground also began to freeze;
The third phase is when pheasants enter the water and become clams.
The pheasant enters the water and becomes a clam. The pheasant refers to a large bird like a pheasant, and the clam refers to a large clam. After the beginning of winter, large birds such as pheasants are rarely seen, but large clams with shells similar in lines and colors to pheasants can be seen on the beach. Therefore, the ancients believed that pheasants would turn into big clams after the beginning of winter.

Introduction to agricultural activities during the Beginning of Winter

By the Beginning of Winter, the high-altitude westerly jet stream has been fully established in southern Asia. At this time, the strength and eastward movement of the southern branch of the high-altitude westerly wind fluctuates. When the Asian region forms a latitudinal circulation and the southern branch of the westerly wind fluctuates strongly, widespread rainy weather will occur.
In addition, the zonal circulation will end and the meridional circulation will be established, with cold waves and a significant drop in temperature. Cool down and prevent cold during agricultural activities.
After the beginning of winter, agricultural and forestry crops in the north all enter the wintering period, and the "three autumns" (autumn harvest, autumn management, and autumn planting) in the Jianghuai region are also coming to an end. In the south, it is the best time to plant late-sown winter wheat.

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