How many days are there in the rainy season?

Question 1: How many days are there in the rainy season from June to July? Meiyu is a unique weather and climate phenomenon in the middle and lower reaches of the Yangtze River in early summer. It is the result of the stagnation of the Yangtze River basin during the northward movement of the main rain belt in eastern China. Meiyu is over and midsummer is coming. The change of this season every year is roughly the same as the movement of the rain belt with the season, forming a certain climate regularity. However, the annual plum rains are not completely consistent, and there are great interannual changes. Meteorologically, the beginning and end time of plum rain are called plum blossom (or plum blossom) and plum blossom (or plum blossom) respectively. In the middle and lower reaches of the Yangtze River in China, plum blossoms in mid-June and in early July every year, lasting for more than 20 days.

Question 2: Solar terms: How long does the rainy season last?

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 "ear seed" and "summer solstice". The meiyu period is about 20-30 days, and the rainfall is between 200-400 mm. Before and after "Little Summer", the main rainfall belt moves northward to the Yellow River and Huaihe River basins, and then to Shandong and North China. The Yangtze River basin began to change from rainy and humid weather to sunny and hot summer. According to statistics, this normal plum rain accounts for about half of the total.

Early plum rain

In some years, the rainy season starts very early and suddenly comes at the end of May and the beginning of June. Meteorologically, the plum rain that began before "Mangzi" is generally called "early plum rain". The early plum rains will bring some abnormal phenomena. For example, since the cold air from north to south is still very frequent in the atmosphere near the ground at the beginning of the rainy season, the temperature is still relatively low and even chilly after the rainy season. The farmer's proverb says, "Eat Dragon Boat Festival Brown and freeze it three times". At the same time, there is no obvious damp phenomenon.

Farmers in some areas in the middle and lower reaches of the Yangtze River refer to Huang Meiyu, where the temperature is relatively low, as "cold water Huangmei". In the future, with the extension of rainy time and the strengthening of warm and humid air, the temperature will gradually increase, the humidity will continue to increase, and the inherent characteristics of Meiyu will become more and more obvious. The chance of early plum rain is roughly once in ten years. This kind of early plum rain often presents two situations. One is to start early and end late, even in late July. The rainy season lasts for forty or fifty days, and some years last for two months. The other is to start early and finish early. By the end of June, the middle and lower reaches of the Yangtze River entered midsummer. Due to the early arrival of midsummer, droughts of different degrees often occur in the middle and lower reaches of the Yangtze River.

Chi Meiyu

Contrary to early plum rain, late plum rain is usually called late plum rain 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 flows northward, its power is very strong, and the solar radiation is also relatively strong. When the air is heated, it is prone to strong convection, so there are often thunderstorms and showers in the later period of Meiyu. People also call this kind of Huang Meiyu "Huangmei". The duration of the late Meiyu is generally not long, with an average of only about half a month. However, the rainfall of this plum rain is sometimes quite concentrated.

Ultra-long plum rain

During the period of 1954, a once-in-a-century flood occurred in the Jianghuai basin of China. The flood was caused by a particularly long-lasting plum rain. This year, there were many spring rains in the middle and lower reaches of the Yangtze River in the second half of May before the beginning of Meiyu. Meiyu came very early and began in early June. The weather has been rainy and rainy, with heavy rain and heavy rain from time to time, which lasted for a long time until the beginning of August. When the rainy weather ended and turned to midsummer weather, it was near "beginning of autumn". This year, the whole meiyu period lasted for two months, and with the spring rain in May, it reached more than two and a half months. After entering the "little summer" and "big summer", the middle and lower reaches of the Yangtze River should have been sunny and hot "dog days", but it has been gloomy and difficult to see the sun. From time to time, pouring rain poured down to the ground, floods rolled in, and "cold" hit people in many areas.

In this year, the rainfall in the middle and lower reaches of the Yangtze River from May to July is generally 800- 1000 mm, which is close to the annual rainfall in normal years in this area. The rainfall in some areas is as high as 1500-2000mm, which is equivalent to the rainfall in the same area for one and a half years, leading to flooding. China has a vast territory, and local floods often occur. Some may be caused by typhoon rainstorm, and some may be caused by several consecutive rainstorms brought by other weather systems, but their duration is not long, the flood recedes quickly, and the influence range is relatively small. It is extremely rare that the rainfall time like 1954 reaches more than two months, resulting in a basin-wide flood in the Yangtze River basin. This rare flood is usually associated with abnormal plum rains. Like the flood in 1998, it was also caused by the extremely long plum rain.

"Short plum" and "empty plum"

Contrary to the exceptionally long plum rains, in some years, plum rains are very inconspicuous. It is like a passer-by, staying in the middle and lower reaches of the Yangtze River for ten days, and then heading north. Moreover, there is not much rain during this period, and it is rare to have one or two heavy rains. This situation is called "short plum". What's more, it's been a few years since early summer.

Since the rare plum rain in Nanjing, there has been no continuous rainy weather in the Yangtze River basin. Most days are sunny, warm as spring, and very cool in the morning and evening, resulting in "Huangmei season is dry and loose ... >>"

Question 3: What does the rainy season mean? How many days is it rainy? 20 10 What are the dates when plum blossoms come in and out in Huangmei season? June 10, 15, plum in (the fourth day of the fifth lunar month) and plum out on July 8 (the 27th of the fifth lunar month). Traditionally, the judgment of entering plum and leaving plum is based on the combination of solar terms and solar terms. According to the calendar, the first third day after mango seeds is plum blossom, and the first last day in Xia Hou is plum blossom. If the weather on the awning day is C, it is designated as entering the plum blossom, and if it is not in the shallow summer, it is designated as leaving the plum blossom. In China's almanac, it is recorded that plum rains began and lasted all day: the first day was called "entering plum blossoms" and the last day was called "leaving plum blossoms". Plum blossoms are planted on the first day after awning, which is the first before sunrise in Xia Hou. The total time of plum blossom is between June 6th and 15, and the total time of plum blossom is between July 8th and 19. There is an obvious rainy season in eastern China, with a long rainy period and relatively concentrated rainfall, which is caused by the displacement of the main rain belt from east to west to north, and is a unique phenomenon of the turning point of the atmospheric circulation in East Asia at the turn of spring and summer. After mid-June, the rain belt remained in the Jianghuai basin, which is Meiyu. The time that the rain belt stays is called "Meiyu season", the day when the rainy season begins is called "entering the plum blossom", and the day when it ends is called "emerging the plum blossom". Meteorologically, the beginning and ending time of plum rain are called entering plum (or standing plum) and leaving plum (or breaking plum) respectively.

Question 4: How many days does the rainy season mean? When is the rainy season? It refers to a period of continuous rainy weather in the middle and lower reaches of the Yangtze River in China from mid-June to early summer in mid-July every year, within the range of 28°-34° N east of Yichang, or in the narrow zone from Jianghuai Valley to southern Japan.

How did the name "Meiyu" come from? Initially, it originated from a meteorological term in China. In ancient times, Meiyu was usually called Huang Meiyu. As early as the Han Dynasty, there were many proverbs about Huang Meiyu. In the Jin Dynasty, there was already a record of "summer rain to the sun, named Huang Meiyu"; Since the Tang and Song Dynasties, there have been many interesting descriptions about Meiyu. Liu Zongyuan, a writer in the Tang Dynasty, once wrote a poem about Meiyu: "Shi Mei welcomes Meiyu, and it is already late spring. I am deeply worried about the night of the ape, and my dream has run out in the morning. The sea fog connects the South Pole, Jiang Yun dark Beijin, plain clothes today, not for the dust of the imperial city ". Among them, "Shi Mei welcomes the rain" means that when plums are ripe, they welcome the rain from summer to three o'clock in the future. At present, the meteorological plum rain refers to a rainy weather that transits from early summer to midsummer.

Question 5: How many days does the rainy season last? I don't like the expressions "Huangmeitian" and "Meiyu season". I haven't seen plum trees, and I don't know what fresh plums look like. All I have seen are deeply processed and unrecognizable candied fruit and the like.

As a direct result, I have never really understood what "Huangmei" and "Meiyu" are for more than twenty years.

If it means rainy in spring and summer, it is said that it has been raining on cloudy days for many days.

Question 6: How many days does the rainy season usually last? Meiyu (Huangmeitian) refers to the cloudy and rainy natural climate phenomenon in the middle and lower reaches of the Yangtze River, Taiwan Province Province, south-central Japan and south Korea every year from late June to early July. Because plum rains occur in the mature period of plums in the south of the Yangtze River, China people call this climate "plum rains", and this period is also called "plum rains season". (about a month)

Question 7: How many days are there in the rainy season? The rainy season usually lasts from June to July. However, the annual plum rains are not completely consistent, and there are great interannual changes. Meteorologically, the starting and ending time of plum rain is put.

Question 8: How long does the rainy season usually last in the south? 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. It is recorded in China's historical records. For example, The Book of Beginners quoted the compilation of Emperor Liang Yuan in the Southern Dynasties, "Plum blossoms have plum rains when they are ripe". Liu Zongyuan's Plum Rain in the Tang Dynasty: "Shi Mei welcomes the rain, and it is worth the late spring." Wait a minute. It is recorded in China's almanac that there is mildew rain all day: it is called "mildew" at the beginning and "mildew" all day long. The first day after the awn is planted, it is moldy, but it is not moldy on the first day after the hot summer. Mold always enters between June 6~ 15 and leaves between July 8~ 19. There is an obvious rainy season in the eastern part of China, with a long rainy period and relatively concentrated rainfall, which is caused by the displacement of the main rain belt from east to west to north, and is a unique phenomenon in the turn of atmospheric circulation in East Asia at the turn of spring and summer. After mid-June, the rain belt remained in the Jianghuai basin, which is Meiyu. The time that the rain belt stays is called "Meiyu season", the day when the rainy season begins is called "entering the plum blossom", and the day when it ends is called "emerging the plum blossom". In addition, due to the high humidity in the air during this period, everything is easy to be damp and moldy, so people gave Meiyu an individual name, called "Moldy Rain". Xie Zaihang's Five Miscellaneous Torches in Ming Dynasty? "Tianbu No.1" describes: "Every year in March and April in the south of the Yangtze River, it rains bitterly, and everything is moldy, commonly known as Meiyu, and it is covered when it is green and yellow. From Xu Huai to the north, it is often dry in spring and summer. At the turn of June and July, it rained heavily and everything was moldy. " Li Shizhen, an outstanding medical scientist in Ming Dynasty, pointed out more clearly in Compendium of Materia Medica: "Plum rain or mildew rain, when it comes to clothes and things, will produce black mold." . Meiyu and rain belt 1. Meiyu is the rainy season in the middle and lower reaches of the Yangtze River in China, usually from mid-June to early July every year. In the past few days, the sky has been gloomy and the precipitation has been constant, sometimes big and sometimes small. Therefore, there is a popular proverb in southern China: When the rain hits Huangmei's head, there will be no sun for forty-five days. Continuous rain, high temperature and high humidity are the main characteristics of plum rain. Very different from the climate in the same latitude area, Meiyu refers to the weather and climate phenomenon that occurs in a certain area and a certain season. It is found that Eurasia is between 20 N and 40 N, which is alternately controlled by subtropical high and westerly belt. The west coast of the mainland is controlled by the downdraft on the east side of the subtropical south pressure in summer, with sunny weather, partly cloudy and dry climate; In winter, under the influence of westerlies, warm and humid air is brought from the Atlantic Ocean, resulting in more precipitation and a mild and rainy climate. That is, the subtropical Mediterranean climate is dry in summer and humid in winter. The east coast of the mainland is controlled by the west side of subtropical high in summer, and the downward flow is dry, but it absorbs a lot of water vapor from the warm and humid sea surface, bringing abundant precipitation and producing a subtropical humid climate. Due to the strong contrast between land and sea, a unique monsoon climate has formed here, which is characterized by rainy summer and dry winter, with rainfall concentrated in summer, which is just the opposite of the Mediterranean climate. If compared with the east coast of Britain at the same latitude, it is also very different. There will be no rainy weather for a long time before and after the summer monsoon in the mid-latitude zone of the east coast of the United States, and people do not feel the feeling of sultry weather for a long time, so it is difficult to appear moldy. It can be seen that the precipitation season at the same latitude varies greatly. So there are only Huangmei in the middle and lower reaches of the Yangtze River in China, starting from the area east of Yichang and 29-33 degrees north latitude, as well as the southeast of Japan and the southernmost tip of the Korean Peninsula. In other words, Meiyu is a unique weather and climate phenomenon in East Asia and the middle and lower reaches of the Yangtze River in China. The atmospheric circulation conditions of Meiyu front rainstorm generally include: ① blocking high pressure or stable high pressure ridge exists in the middle troposphere in high latitudes of Asia, and the atmospheric circulation is relatively stable and rarely changes; ② The westerly circulation in mid-latitude area is flat, and frequent short-wave activities provide cold air conditions for Jianghuai area; ③ The western Pacific subtropical high has an obvious process of extending westward and jumping northward. The ridge line of the 500 HPA subtropical high is stable between 20 and 25 degrees north latitude, and the warm and humid air flow is transported from the edge of the subtropical high to the Jianghuai basin. Under this circulation condition, Meiyu front lingers in the Jianghuai basin, often accompanied by southwest vortex and shear line, and the mesoscale system on Meiyu front is active. It not only maintains the continuous precipitation during the Meiyu period, but also provides abundant water for the rainstorm. Meiyu front rainstorm is a special weather in a specific area formed by the interaction of circulation systems of different scales. The variability of atmospheric circulation leads to the late start and short duration of meiyu period every year. In some years, the Meiyu front is particularly active, with frequent rainstorms, leading to flooding. In some years, the meiyu front is not obvious, and there are "empty plums", which leads to dry weather. In a few years, there will be ... >>

Question 9: How long does the rainy day usually last? Meteorologically, Meiyu is a unique climatic phenomenon in the process of seasonal transformation of atmospheric circulation in East Asia at the turn of spring and summer, which can be divided into typical Meiyu and early Meiyu. Typical plum rains generally "enter plum blossoms" from early June to mid-June, and bloom from early July to mid-July. Meiyu refers to the rainy days before plum blossom, which generally starts in mid-May and lasts for about half a month. After meiyu, the rain belt often recedes to the south for a period of time, and then goes north, which is a typical meiyu. In most years, the rainy season lasts for 20-25 days, ranging from more than a month to a few days. There is no plum rain in a few years, and the rain belt quickly passes through the Jianghuai Basin from South China to North China, which is called "empty plum". The rainy season in Hubei Province generally begins in the middle and late June and ends on July 9 in recent 30 years. (Two years ago.

Question 10: How many days does the rainy season usually last? About 15 to 25 days. The rainy season in the Yangtze River basin is shorter than that in the Pearl River basin, and sometimes it is uncomfortable to stay dry for more than a month.