"Empty plum" mainly refers to the phenomenon of insufficient rain in which area of our country.

In the middle and lower reaches of the Yangtze River in China, Taiwan Province Province, south-central Japan, South Korea and other places, there will be continuous rainy weather in June and July every year. Because it is the mature period of plums in Jiangnan, it is called "Meiyu", and this period is called Meiyu season.

Meiyu refers to the weather and climate phenomenon that occurs in a certain area and a certain season. Meiyu is a unique weather and climate phenomenon in East Asia and the middle and lower reaches of the Yangtze River in China.

Meiyu refers to a period of continuous rainy weather from mid-June to early summer in mid-July, from the middle and lower reaches of the Yangtze River in China to 28°-34° N east of Yichang, or the Jianghuai Valley, to a narrow area in southern Japan.

In early summer, there are often long rainy days in the Jianghuai basin. At this time, the utensils are easy to be moldy, so it is also called "moldy rain" or "mildew" for short; It is also called "Plum Rain" or "Huang Meiyu" because plums in the south of the Yangtze River are yellow and ripe. After mid-June, the rain belt remained in the Jianghuai basin, which is Meiyu.

Extended data

Every year from late April to early May, cold air from the north and warm air from the south meet in South China, forming a quasi-static front in South China. By the end of May, the influence of warm air was strengthened, and the quasi-static front moved northward to Jianghuai area, becoming the quasi-static front of Jianghuai (also known as Meiyu front).

Because the warm air from the south carries a lot of water vapor, when it meets the cold air mass, it will produce a lot of convection activities. Because of the equal influence of cold and warm air during this period, the front stays in Jianghuai area.

Typical plum rains generally "enter plum blossoms" in the middle and late June, and bloom in early to mid-July. Meiyu refers to the rainy days before plum blossom, which generally starts in mid-April and lasts for about half a month.

Baidu Encyclopedia-Meiyu Season

Baidu Encyclopedia-Meiyu