When is the dragon boat water in 2020? When does the South China Sea summer monsoon break out?

Dear friends, some cities are about to usher in the rainy season. During the period around the Dragon Boat Festival, precipitation may be concentrated, so friends must pay attention when traveling. Here is the estimated time of dragon boat water and the related introduction of the South China Sea summer monsoon.

Dragon boat water time

"Dragon Boat Water" usually refers to the period when heavy precipitation is concentrated around the Dragon Boat Festival. There are often days of heavy rain, heavy rain and even heavy rain and heavy rain. During the Dragon Boat Festival, people call it "Dragon Boat Water". For the convenience of statistics, meteorological departments generally refer to the precipitation from May 2 1 day to June 20.

The following is the specific weather forecast

From the night of 20th to the night of 2 1 day, there was heavy rain to heavy rain, accompanied by short-term heavy precipitation, thunderstorms and strong winds and other strong convective weather;

Heavy rain turned to showers on the 22 nd;

On the 23 rd to 24 th, it was mainly cloudy with showers or thunderstorms;

On may 25-26, there was another obvious rainfall process;

On the 27th, it was cloudy with thunderstorms and partial heavy rain.

skill

1. There will be frequent precipitation in the next few days, so it is necessary to guard against heavy precipitation and its geological disasters such as waterlogging, mountain torrents, mudslides and landslides in urban and rural areas.

2. It is necessary to guard against disasters such as factory sheds, temporary structures, external billboards and tree collapses caused by local lightning strikes and short-term strong winds;

4. To prevent the influence of strong convection on offshore operations and water traffic, various safety measures should be taken.

What is the South China Sea Summer Monsoon?

Generally speaking, the summer monsoon is the wind blowing from the ocean to the land, carrying a lot of water vapor. In summer, the land is hot, and the ground air "runs" to the sky after being heated and expanded, which is equivalent to a large piece of ground air "missing", thus forming a low pressure. The ocean is warming slowly, so the sea surface is colder than the land, and the air is compressed "down" and gathered together to form a high pressure. Water flows downwards, so does air. From high to low, the wind is formed.

It means that "Ren Durmai" has been opened, and the water vapor channel from the Indian Ocean through the Indian Peninsula, the Bay of Bengal, the Indo-China Peninsula and the South China Sea to the central and eastern regions of China has been opened, and the water vapor transport in the southwest region has been significantly enhanced. With the cold air activity in the north, it is easy to lead to the increase of strong precipitation events with large intensity, wide range and long duration from Jiangnan to South China, and frequent strong convective weather.

What is the relationship between the South China Sea summer monsoon and Longzhou water?

One of the reasons for the dragon boat water is the outbreak of the summer monsoon in the South China Sea. After the onset of the monsoon, the southwest water vapor rushed into South China and met the topography of Guangdong, which was low in the south and high in the north. In the process of progress, just like climbing a mountain, it is easy to condense into rain, which is what we often call monsoon precipitation.