Gloomy weather vocabulary

Haze: smog pinyin: yρnmáI The common name of smog is 1. The weather is gloomy and gloomy. It is a metaphor for the shadows and unpleasant atmosphere in people's hearts. The term smog meteorology refers to the turbidity caused by a large number of particles such as smoke and dust suspended for unknown reasons. The core substance of smog is dust particles suspended in the air, which are called aerosol particles in meteorology. -Liu Tang Zongyuan's "Dream Back to Fu": "In the daytime, haze emerges and is released." The fourth fold of the Yuan Pavilion: "Tight clouds lock the ice cliff, the wind gathers haze, and the snow scatters dust." It is a metaphor for the shadows and unpleasant atmosphere in people's hearts. Cao Qingyin's poem "Waiting for the Moon in the Mid-Autumn Festival West Hall" says: "The clouds in the turbid world are long and sad, and the magic ladder is strong and high." Mao Dun's color blindness IV: "He came to this cat-faced friend to solve the problem because he was puzzled; He hopes that strong and exciting words can drive away the haze in his heart. "Modern application: in modern literature, especially light novels, it is often used to describe people's spiritual shadow and unpleasant atmosphere, or what can't be said. Haze, light fog, sandstorm, sand blowing, floating dust, smoke and other weather phenomena are all due to a large number of extremely fine dust particles or smoke particles floating in the air, which makes the effective horizontal visibility less than 10KM. Sometimes it is difficult for meteorological professionals to tell the difference. We must analyze and judge the weather background, sky conditions, air humidity, color and smell, satellite monitoring and other factors in order to draw the correct conclusion that smog is also called atmospheric brown cloud. In the ground meteorological observation standard of China Meteorological Bureau, the definition of haze weather is: "A large number of extremely fine dry dust particles float in the air evenly, which makes the air with horizontal visibility less than 10 km generally turbid, and makes bright objects in the distance slightly yellow and red. The weakest intensity is called dusty weather. Floating dust is formed by fine particles such as dust and sand floating in the air after sandstorm or sand blowing in remote or local areas, commonly known as "falling yellow sand". When it appears, the distant objects are khaki, the sun is pale or yellowish, the visibility is less than 10 km, and more than 1 km, and there is basically no obvious wind. Atmospheric particles with a diameter less than 0. 1 micron are called floating dust and sandstorm, both of which are caused by violent activities of large airflow in a specific area. Its * * * characteristics are obviously reduced visibility and cloudy sky. It mostly happens when cold air passes through the border in the northern spring, but the difference is that the visibility affected by sand blowing weather is between 1 km and 10 km. The visibility of sandstorm and windy weather is even less than 1 km. As a kind of high-intensity sandstorm disaster, sandstorm can't happen in all windy places, but only in those areas with dry climate and sparse vegetation. Sandstorms often occur in January every year. Take the northwest region as an example. At this time of year, the Hawaiian high is formed in the world and the Indian low is formed in Asia. A strong southerly wind blows from the ocean to the ground, and the Mongolian high that controls it begins to move westward and northward, where cold and warm air flows meet. The heavy Siberian cold current comes rapidly from west to east, often forming strong winds. The wind force that forms sandstorms is generally above magnitude, and the wind speed is about meters seconds. In addition, the formation of sandstorms requires sufficient sand sources, and dust can be blown off the ground by the wind.