How many days, minutes and seconds will the great cold in 2020 enter?

The severe cold in 2020 is 65438+22:00+0:00 on October 20th in Gregorian calendar.

During the severe cold solar term, the atmospheric circulation is relatively stable, and the adjustment period of circulation is about 20 days. When this circulation is adjusted, there will often be a wide range of rain and snow weather and strong winds to cool down. When the west of 80 degrees east longitude is a long wave ridge and East Asia is a coastal trough, under the influence of northwest wind flow control and constantly supplemented cold air, China will have a sustained low temperature. Like slight cold, great cold is also a solar term indicating the degree of cold weather.

According to the statistics of perennial climate data in China, the coldest period of a year in northern China is in June 65438+1mid-October (June 10 -20) of the Gregorian calendar every year. The annual slight cold solar term starts from 65438+1October 5-7, one solar term is about 15 days, and the middle section is just within the slight cold solar term; So for most parts of the north, slight cold is indeed colder than severe cold.

But for most parts of the south, it is the coldest in the great cold solar terms; The severe cold solar term in the south generally starts from 65438+1October 20th, and the end of 65438+1October is the coldest time of the year in the south.

rural activity

In the severe cold season, it is necessary to master the law of changes in the temperature of agricultural production, pay close attention to the forecast of meteorological departments at any time according to different years, different geographical locations and topographic conditions, and plant crops reasonably to avoid unnecessary losses.

For example, before introducing new crop varieties, we should have a clear understanding of the topography, surrounding environment, temperature, precipitation and humidity of the planting area, and fully investigate and demonstrate whether the introduced varieties are suitable for the local meteorological environment.

Especially in the large-scale introduction of cash crops, it can not be ignored; Small-scale planting should also pay attention to the surrounding terrain and environment. For example, around large reservoirs, due to the temperature regulation of water, freezing damage is often light or not. Some cash crops and flowers that are easily frozen can be planted around the reservoir before the cold winter comes.

According to the weather changes, the temperature and humidity of greenhouse crops should be well controlled. Both ends of the greenhouse should be ventilated around noon, but they must be closed before 4 pm to maintain the temperature in the greenhouse.