Introduction: In the early morning of December 29 this year, when you open the window, you may be struck by what you see in front of you – a vast white fog. Yes, many parts of China were suddenly encircled by a thick fog. This is not just an ordinary foggy day, but the first red warning for fog issued by the Central Meteorological Observatory since 2015. So, what is the cause of such an extreme weather event? Today we will explore the hidden weather code behind it.
Text: First of all, we need to know how fog is formed. To put it simply, fog occurs when water vapor in the air near the ground condenses into tiny water droplets. However, to achieve such a level as a red warning, special meteorological conditions are required. According to the combination of factors such as long-term stability, humidity and radiative cooling in the middle and night, the visibility in the local area is extremely low.
The fog is closely related to the recent cold wave on the mainland. A cold wave is a weather process in which cold air moves strongly southwards and causes a sudden drop in temperature, accompanied by strong winds and significant cooling. The Russian meteorological service monitored the emergence of an unusually strong group of cold air in the Siberian region and a rapid advance towards the north of the continent. This cold air brought with it a bitter cold and dryness, setting the stage for the fog.
Another factor that should not be overlooked is the Arctic Vortex – a powerful low-pressure system that orbits the Arctic and affects the global winter weather circuit and temperature distribution. When the Arctic vortex strengthens or shifts in position, it can push the cold snap directly into the mid-latitudes by influencing jet stream fluctuations. The Arctic vortex showed signs of instability at the beginning of this winter and began to have a significant impact on continental weather in mid-December.
Looking back at the changes in weather patterns throughout December, from warm spells to cold spells to short-lived warm-ups at the end of the month, we can see the impact of temperature differences on quality of life and health.
So, in the face of such complex and changeable weather conditions, how should we respond? First of all, pay attention to the official weather forecast and do a good job of protection. For example, reduce outdoor activities when a red fog warning is issued, turn on your fog lights and keep a safe distance when driving, and keep warm and prevent water pipes from freezing and cracking during a cold spell.
Summary: Through the above in-depth analysis, it can be seen that under the interweaving of many factors in nature, a rare fog warning event has been formed. Whether viewed from a professional perspective or from a level of public concern, it is necessary to raise awareness, strengthen scientific understanding, and take necessary measures to ensure the safety of people's lives and property. Let's keep an eye out for more detailed and accurate weather information in various regions of the continent in the coming days, and wish everyone a safe ride through every changeable weather!