What does it mean to be cold in late spring and winter?

It will get cold in the end in winter, which is a folk proverb in China, describing a weather phenomenon. This proverb means that if winter comes at the end of the month, there may be a weather phenomenon called "late spring cold" in spring. Late spring cold refers to the weather phenomenon that the temperature rises rapidly in early spring, but suddenly drops sharply in the middle and late spring.

The formation of late spring cold is related to many factors such as cold air activity and climate change. When the strong cold air in the north goes south, the temperature will suddenly drop, forming a late spring cold. In addition, when the warm and humid air flow in the ocean meets the cold air on land, it will also form continuous rainy weather, leading to a drop in temperature.

From a scientific point of view, we can predict the occurrence of late spring cold according to historical meteorological data and climate prediction model. However, due to the complexity and uncertainty of the climate system, the prediction results often have certain errors.

standard

The late spring cold mainly refers to the weather phenomenon that the average temperature drops below the same period of normal years and lasts for a period of time under the background of the general increase of temperature in spring (March-May) in China, affected by the frequent cold air going south in the north or the continuous rainfall in the south. As for the extent and duration of cooling, local standards are slightly different. For the northern region, the cold spring means that the cold air force is enhanced and the temperature drops sharply; For the southern region, it is usually associated with low temperature and rainy weather.

Agrometeorological experiments show that the average daily temperature is less than12℃ and the maintenance period is more than 3 days, which is not conducive to seedling growth. If the cooling is accompanied by rainy weather, the harm will be even greater, which is a relatively recognized indicator. In southern China, the spring sowing time comes first and then comes, and the period and intensity index of the cold spring are also slightly different.