How long will Guangdong return to Nantian in 2022?

In 2022, Guangzhou returned to Nantian for 3 to 5 days. Returning to Nantian often occurs in the season of alternating February and March, and generally ends in April. Generally, if it is supplemented by cold air, it will disappear immediately after returning to Nantian. If you keep warm, it can last for 3-5 days. Can grow for more than half a month.

Returning to Nantian is a phenomenon of warmer weather, which generally appears in February and March in spring. The main reason is that the warm and humid airflow quickly counterattacks after the cold air leaves, which leads to the increase of temperature and air humidity. Some cold objects are easy to produce water droplets when they encounter warm and humid airflow. The tropic of Capricorn is more serious in the south, which is related to the sea and humid air in the south. When Returning to the South Sky appeared, the air humidity was close to saturation, and the walls and even the ground would be flooded. Everywhere is wet, and the air seems to be able to wring water out. The dense fog is the most distinctive appearance of returning to the south. According to statistics, when the phenomenon of returning to the south is serious, the visibility can be reduced to 50 meters.

The main reason for the formation of South China Station in spring is that there will be water on the walls and floors of South China Station, which is actually similar to the principle of sea fog. Warm and humid 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 between the sea surface through which the airflow passes is large, there is a greater chance of forming fog.

Similarly, due to the cold weather in winter, the walls and floors are very cold inside and outside. If warm and humid air flows through the walls and floors at this time, the water in the air will condense into water droplets and adhere to the walls and floors, just as water seeps from the walls and floors. In summer, even if there is humid ocean airflow, the walls and floors are not cold enough inside and outside, and the walls and floors will not get out of water.

Generally speaking, there are two main conditions for the formation of returning to Nantian:

1, there is a long period of low temperature, and the daily average weather is lower than 12 degrees Celsius, and it must 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.