First, the formation process of advection fog
Why does advection fog always form in winter? In fact, it is inextricably linked with its formation process. The so-called advection fog is formed when a warm air mass collides with the ground or water surface, and it is cold below. Its formation conditions are also very harsh. Generally speaking, there are two very necessary conditions: first, there is a very large temperature difference between warm and humid air and the surface, and second, there must be a suitable wind direction and speed. Because only when the temperature difference is large, the temperature of the near-surface gas layer will drop rapidly, and then the relative humidity will increase continuously, thus forming the advection fog. If advection temperature deficit can be formed near the ground at this time, the formation of advection fog will be easier; In addition, wind direction and wind speed also have great influence. Proper wind direction and speed can not only make the wet warm air flow to the ground continuously, but also form a strong airflow, which makes the fog very thick.
Second, the harm of advection fog
Is advection fog like that? The more charming, the more dangerous? It is also very harmful: first, as usual, it will cause serious stress to the human respiratory system; Secondly, the fog will contain some particulate pollutants, which will greatly stimulate the human lungs; Finally, it will bring a heavy burden to our travel.
Third, the characteristics of advection fog
1, advection fog may appear at any time of the day, which is unnecessary all day. Advection fog covers a large area, ranging from several hundred meters to several thousand meters. 3. advection fog is very dangerous for flight safety. It comes suddenly, produces quickly and lasts for a long time. So, once there is a very headache.
In a word, everyone loves beauty, but beauty is beauty. Wear a mask when you see it!