Since February 25, the central and eastern regions of China have ushered in a wave of warm weather. The country has continued to warm up for 3-4 days from north to south, and the average daily temperature in most areas of North China and south has increased by about 10 degrees Celsius. From March 1, as cold air hits, the temperature will turn to a cooling temperature in most areas.

According to the monitoring of the Central Meteorological Observatory, the cumulative temperature rise in the central and eastern regions generally exceeds 10 degrees Celsius, and the single-day temperature rise in Wuhan, Hubei, Hangzhou, Zhejiang and other places has reached 15 degrees Celsius.
Is it normal for such a large recovery? Is the cooling that began on March 1 a cold spring? Chen Boyu, chief forecaster of the Central Meteorological Observatory, said that it is normal for China’s spring temperature to fluctuate, and this temperature rise is a normal phenomenon.
As for the reasons for the rapid warming, Chen Boyu analyzed that from the perspective of the circulation situation, the high-altitude cold vortex system located in the Russian Far East has contracted northward, and the central and eastern regions of China have gradually turned to be controlled by high-pressure ridges. The area controlled by the ridge of high pressure has less cloud cover and more radiation during the day, which is conducive to rapid warming. Under this circulation, the surface cold air in Mongolia weakened significantly, lost the southward replenishment of the cold air from the north, and the cold high pressure system that controlled the central and eastern parts of China gradually weakened and moved eastward, and the temperature began to rise.
In addition, from 25 to 28 February, the subtropical high system gradually lifted northward. The plateau fluctuation and southern branch trough fluctuation in the central and western regions of China are more frequent, which significantly strengthens the southerly warm and humid airflow behind the eastward moving cold high, forming an abnormally strong warm advection affecting the central and eastern parts of China. This is also an important factor in the rapid rise in temperature.
Is it scientific to say that this recovery is a “bad recovery”? According to Chen Boyu, the so-called “bad warming” is actually the public’s concern about temperature fluctuations, the discomfort of severe temperature differences, and the risk of plants facing “flowering first and then freezing”. Judging from the recent temperature changes, this warming belongs to the characteristics of the season itself; From the perspective of the impact of warming, the negative impact is small and cannot be called a “bad warming”.
According to the forecast of the Central Meteorological Observatory, this wave of warming will only last for a few days, and from March 1, the central and eastern regions will once again usher in a sharp cooling from north to south, and the central and eastern regions will generally cool down by 6-10 degrees Celsius. Zhang Tao, chief forecaster of the Central Meteorological Observatory, said that the cold air mainly moved south from north to south from the east road, affecting most of the central and eastern parts of China, and all the way to South China, with a significant cooling range.
Is this cooling a cold spring? Zhang Tao said that the inverted spring cold mainly refers to a period of time after the beginning of spring, especially the cold that lasts for a period of time in the middle and late spring. The cold air at the beginning of March is a normal cold air effect after entering spring, and it cannot be called an inverted spring cold.
According to expert analysis, the cold air process from March 1 to 3 may bring the temperature back to pre-warming levels. Before the end of March, China will experience 3-4 temperature fluctuations. Experts suggest that due to the large fluctuations in temperature, the public is advised not to put away thick clothes immediately, nor to reduce clothing quickly, and should pay attention to the weather forecast in time.