202 1 When will you return to Nantian? What month?

In Guangdong, south of China, there is a special climate phenomenon-returning to Nantian. The arrival of the southern sky will make the family environment extremely humid and even moldy. So when is the return to Nantian and what are the conditions for its formation?

When will you return to Nantian?

"Returning to Nantian" usually lasts for 3-5 days. Usually supplemented by cold air, it disappears immediately. If the weather stays warm, it will last for 3-5 days. Can be longer than half a month.

Returning to the south often occurs in the season of alternating February and March, and usually ends in April.

If you want to get rid of this kind of weather completely, it is after Tomb-Sweeping Day every year, because it rains a lot every year in Mao Mao, Tomb-Sweeping Day, which is always like this after the festival, usually in April 15, and then you can get rid of this continuous weather.

When is Guangdong going back to Nantian?

Guangdong's return to the south usually occurs in February-March.

From the meteorological point of view, after a long period of low temperature, the inside and outside of the object is completely cold. When the temperature of the object is less than or equal to the dew point temperature, the water vapor in the air reaches saturation and begins to condense on the surface of the object, forming water droplets and returning to the southern sky. The so-called dew point temperature refers to the temperature at which the air reaches saturation when the air temperature drops under the condition that the water vapor content and air pressure in the air remain unchanged. The main reason is that after the cold air passes, the warm and humid airflow quickly counterattacks, resulting in an increase in temperature and air humidity. Some cold objects are easy to produce water droplets when they encounter warm and humid airflow.

Formation conditions of huinantian

Generally speaking, the formation of huinantian requires two conditions.

1, there is a long period of low temperature, and the average daily weather is below 12 degrees Celsius, and it will last for at least 3 days.

2, the weather changes suddenly, and it will suddenly become warm and wet after a long period of low temperature. Back in the south, the humidity sometimes reaches 100%.

What does it mean to go back to Nantian?

Returning to Nantian is a weather phenomenon. Maybe northerners don't know much about it, but southerners should be troubled by it every year. The biggest feature of returning to Nantian is that the air is humid and rainy.

The phenomenon of returning to the south mainly occurs in the south. It means south wind. Returning to Nantian is a resurgence, and the south wind blows in spring, so it is called returning to Nantian. The phenomenon of returnees in the south is more serious, close to the sea and the air is humid. When returning to Nantian appeared, the humidity of the air was close to saturation, and the walls and even the ground would be "water". Everything is wet, and the air seems to be wringing out. Thick fog is the most distinctive feature of "returning to the south sky"

The principle of returning south is similar to sea fog. Warm ocean air flows from the warmer sea surface to the colder sea surface, and the water vapor in the air condenses into water droplets and accumulates in the air to form fog. If the temperature difference of the sea surface where the air flows is large, there is also a great chance of forming fog. Similarly, due to the cold weather in winter, the walls and floors are very cold inside and outside. At this time, if warm and humid air flows through the walls and floors, the moisture in the air will condense into water droplets and adhere to the walls and floors, just like the walls and floors are leaking.