When is the rainy season in 221?

When is the rainy season in 221

When is the rainy season in 221? After the annual awning season, many places will have a very annoying rainy season. At this time, the temperature is high and the rain is frequent, which leads to an increase in temperature, and many things are prone to mildew. Come with me now to see when the rainy season is in 221.

when is the rainy season in 221? 1

The rainy season in 221 probably begins on June 7th, 221 and ends on July 1th. Therefore, plum blossoms usually enter in early June and come out in early July.

it should be pointed out that the start time of the rainy season is gradually delayed with the increase of latitude. Taiwan Province enters Mei in mid-May, while the middle and lower reaches of the Yangtze River enter Mei in mid-June every year on average, and the Japanese mainland enters Mei in mid-June.

The rainy season lasts about 2-3 days, and the rainfall is between 2-4 mm.. Before and after the "light summer", the main rainfall moved northward to the Yellow River and Huaihe River basins, and then moved to Shandong and North China. Due to the rainy, hot and humid weather in the Yangtze River basin, it began to turn into sunny and hot summer.

how long does the meiyu season last

Normal meiyu

Normal meiyu in the middle and lower reaches of the Yangtze River begins in mid-June and ends in mid-July, which is in the two solar terms of "Mangzhong" and "Summer Solstice". Meiyu period is about 2-3 days long, and the rainfall is between 2-4 mm.

early plum rains

in some years, plum rains start very early and suddenly arrive at the end of may and the beginning of June. Meteorologically, the plum rain that started before the "awn seed" is generally called "early plum rain". Early plum rains will bring some abnormal phenomena. For example, in the atmosphere near the ground, the cold air from the north to the south is still very frequent in the period just after the rainy season. Therefore, after the rainy season, the temperature is still relatively low, and it even feels chilly.

Late Meiyu

Contrary to early Meiyu, it is late Meiyu, which is usually called late Meiyu in meteorology. There are more opportunities for late meiyu than early meiyu. Because the solar term is already late at the beginning of the late Meiyu, once the warm and humid air goes north, its power is very strong, and at the same time, the solar radiation is also relatively strong. After the air is heated, it is prone to intense convection, so there are often thunderstorms and showers in the late Meiyu.

"short plum" and "empty plum"

In some years, the plum rain is very inconspicuous, just like a passer-by who comes and goes in a hurry. After staying in the middle and lower reaches of the Yangtze River for ten days, he hurried north. Moreover, there is not much rainfall during this period, and it is rare to have one or two heavy rains. This situation is called "short plum". What's more, some years are from early summer. When is the rainy season in 221? 2

What is the rainy season?

Meiyu was often called Huang Meiyu in ancient times. As early as the Han Dynasty, there were many proverbs about Huang Meiyu. In the Jin Dynasty, there has been a record of "the rain of the summer solstice, named Huang Meiyu"; Since the Tang and Song Dynasties, there have been many interesting descriptions of Meiyu. Liu Zongyuan, a writer in the Tang Dynasty, once wrote a poem about Plum Rain: "Mei Shi welcomes the rainy season, and it's late spring when it's boundless, and I'm deeply worried about the night of the ape, and the dream is over in the morning. Sea fog even the South Pole, Jiang Yun dark Beijin, plain clothes today, not for the dust of the imperial capital ". Among them, "Mei Shi welcomes the rain" means that when plums are ripe, they are greeted with the rain at three o'clock after the summer solstice. At present, the rainy weather in meteorology refers to a rainy period of transition from early summer to midsummer.

He Zhu was once known as "He Mei Zi" in the Song Dynasty. It is said that it was because he wrote such a famous sentence in the word "Jade Case": "One Sichuan tobacco, the city is full of wind, and plums are raining yellow". In the Song Dynasty, Chen Yanxiao also wrote in "Poems on Geng Xi" that "when the plum blossoms in the south of the Yangtze River ripened in May, the rain continued for ten days, which was called Huang Meiyu". In the Ming Dynasty, Xu Yingmi wrote in "Talking about Hui in Yuzhitang": "After the awn, plum blossoms will be established, and after that, plum blossoms will be broken." The "Huang Meiyu" in history usually refers to the precipitation in the "Mei" festival.

People in the middle and lower reaches of the Yangtze River are used to taking the solar term of "Mangzhong" as the Mei Festival, which is at the ripe time of plum, so it is also called "Huangmei".

In addition, due to the high air humidity during this period, everything is easy to get damp and mildew, so people gave Meiyu another name, called "mildew rain". In the Ming Dynasty, Xie Zaihang's "Five Miscellaneous Torches and One Sky Department" described: "Every year in March and April in the south of the Yangtze River, there is bitter rain, and everything is moldy and rotten, which is commonly called plum rain, and it is also covered when plums are green and yellow. From Xu Huai to the north, it is often dry in spring and summer. By the turn of June and July, it is raining hard and things are moldy. " In Compendium of Materia Medica, Li Shizhen, an outstanding medical scientist in the Ming Dynasty, pointed out more clearly: "Plum rain or mildew rain, when it comes to clothes and things, all produce black mold.".

It can be seen that the appellation of "Plum Rain" or "Mild Rain" has a long history, and it began to spread in China. It can be traced back at least more than a thousand years ago, when there was a long-lasting gloomy and rainy weather in the Jianghuai area, when plums in the south of the Yangtze River were yellow and ripe, so it was called "Plum Rain" or "Huang Meiyu".