Is it cold or warm this winter? Expert analysis

According to experts' analysis, the winter temperature in 2023 is close to the same level in previous years, neither too cold nor too warm.

Since June, 5438+February, 2032, the temperature in many places in China has been greatly reversed. On February 29th, 65438, Jia Xiaolong, deputy director of the National Climate Center, responded at a press conference held by the China Meteorological Bureau. He said that since 65438+February, as of the 28th, the national average temperature was -2.8℃, close to the same period last year.

According to reports, there were three cold air processes affecting China from June 5438 to February 2023. Among them, 65438+ February 2 to 13 is the warmest in the same period in history; Extreme cold weather occurred from June 4 to 24, 65438, and its comprehensive intensity was the strongest since June+February, 65438. The reason is that Jia Xiaolong said that the strongest cold wave weather process in June+February in 5438 was mainly due to the meridional characteristics of the circulation in middle and high latitudes in Europe and Asia.

Main hazards of cold wave

An obvious feature of cold wave weather is severe cooling. Low temperature will lead to crop freezing, rivers and ports freezing, traffic interruption, and often bring economic losses to industry and agriculture. Cold wave freezing injury refers to the freezing injury of winter cold to overwintering crops. The cold wave weather process is a weather process in which a large range of strong cold air moves south in high latitudes, causing severe cooling and strong winds in its path.

When the temperature drops below 0℃ (freezing point) or remains below 0℃ for a long time, the plants of overwintering crops will be frozen and lose all physiological activities, leading to plant withering or death. Severe low temperature will also cause livestock to get sick or freeze to death, which will lead to serious meteorological disasters in agriculture and animal husbandry, that is, cold wave freezing injury. Cold wave freezing injury is mainly caused by low temperature freezing injury to plant tissues below 0℃ (freezing point). Many research results show that the freezing of cells and tissues caused by low temperature is the cause of plant death.

Baidu encyclopedia-cold wave