[Explanation] Recently, a cold air has affected most parts of China. On February 1, most parts of the central and eastern regions dropped significantly.
Dong Quan, chief forecaster at the Central Meteorological Observatory, said that on February 2, the cold air continued to move southward, and its impact on China was coming to an end.
[Concurrent] Dong Quan, chief forecaster of the Central Meteorological Observatory
This time the cold air began to enter our country on January 31, moving southeast from the central and eastern parts of Inner Mongolia. (Currently) the cold air has reached the area around Nanning, and will continue to go south along the East China Sea and the South China Sea.
Basically, the influence of the cold air during the day tends to end today. Starting from February 3rd and 4th tomorrow, most areas will gradually warm up in the next 10 days. The 0℃ line will move northward to the Yellow River area. It is the area in the north of Shandong and the north of Henan.
[Explanation] As the cold air goes south and the warm and humid air flow converges, the rain in the south has increased significantly. According to the forecast of the Central Meteorological Observatory, there will be persistent rainy weather in the south in early February.
[Concurrent] Dong Quan, chief forecaster of the Central Meteorological Observatory
From February 2nd to around 15th, the rain in the south is a continuous process. The historical precipitation in the first ten days of February in the south is about 20 to 30 mm. This time (rainfall) is basically heavy. Thirty to forty (millimeters) in places, maybe fifty or sixty (mm) in the largest places, basically a little more than the same period in history.
The process of relatively strong precipitation should be from February 6th to 8th. Hunan, Jiangxi, Fujian, including Guangxi, and Guangdong may experience moderate to heavy rain, and the precipitation can fall to about 20 mm to 40 mm.
[Explanation] Most of the country will gradually warm up from tomorrow, and February 4 will also usher in the "Lichun" solar term of the lunar calendar. In people's daily concept, spring will come after Lichun.
In fact, there are strict standards in meteorology for the definition of "spring".
[Concurrent] Chen Yu, chief service officer of the National Climate Center
Seasons in our meteorological sense are divided by temperature, so we generally call them "climate seasons". ℃, and less than 22 ℃, by performing a relatively complex statistical calculation on the temperature of many days, it can be calculated which day has reached the standard of spring.
[Explanation] According to Chen Yu, according to this standard, there are significant differences in the progress of spring across the country from south to north.
[Concurrent] Chen Yu, chief service officer of the National Climate Center
Like South China, it is the first place in our country to enter spring, and it usually enters spring in January.
In the south of the Yangtze River, spring usually begins in February.
In the middle and lower reaches of the Yangtze River, the Sichuan Basin, the Jianghan Plain, the Huanghuai River, and the northern part of South China to the southern part of North China, spring usually begins in March.
In places like the northern part of North China, the southern part of Northeast China, and the eastern part of Northwest China, spring usually begins in April.
In places such as the northeastern part of the northeast, the northeastern part of Inner Mongolia, and the Qinghai-Tibet Plateau, spring usually does not start until after May.
Judging from this year's situation, at present, most of South China and Jiangnan have entered the spring, and the spring is slightly earlier than the normal years in South China, 1 to 5 days earlier, and the spring in the south of the Yangtze River is obviously earlier. In normal years, it is about 20 days earlier than normal.
Dong Zeyu reports from Beijing
Editor in charge: [Ji Xiang]