Why is there dense fog in Haikou during the Spring Festival holiday in Hainan Island?

"The main reason for the fog during the Spring Festival holiday in Haikou, Hainan Island is that the underlying surface was relatively cold in the early stage. In the later period, the cold air weakened and turned to southerly wind to warm up, and the warm and wet air condensed into fog on the cold underlying surface. This kind of fog is called advection fog, especially at sea. Advection fog will have a greater impact on the sea. First, advection fog at sea lasts longer and has a wider scope than land. Second, because the underlying surface of the sea surface is relatively uniform, advection fog is easy to maintain. "

Fog is the condensation phenomenon of water vapor in the air near the ground. There are two basic conditions for the formation of fog. One is that the air near the ground is rich in water vapor, and the other is that the ground temperature is low.

Because the weak cold air on the surface spreads to Qiongzhou Strait and the northern part of Hainan Island, and Hainan Island and most of the surrounding sea areas are in a warming state, under the action of air flow from east to southeast, it is easy to form a low-level inversion in the Strait and the northern part, resulting in advection fog.

Because it is advection fog, it will last for a long time, and this weather will last until tomorrow morning. Meteorologists reminded that outdoor activities should be reduced in foggy weather, travel plans should be adjusted in time according to weather conditions, and traffic safety should be paid attention to. Ships working at sea should pay attention to navigation safety. Don't go out to exercise in foggy days, let alone do strenuous exercise in foggy days.

The meteorological department reminded that fog is a disastrous weather, and the combination of fog and pollutants in the air will also bring great harm to people's health. Therefore, in foggy weather, the transportation department should strengthen management; Drivers and friends should pay attention to driving carefully; Friends who like sports should stop some outdoor activities appropriately. At present, it is the peak of the return trip during the Spring Festival holiday. Please pay attention to the latest weather forecast, work and rest scientifically and arrange your trip reasonably.