That ... word to describe bad weather or bad mood.

Pinyin: y and n má i

A general term for haze.

1. The weather is gloomy and gloomy. 2. Metaphor is the shadow 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.

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1. The weather is gloomy and gloomy. 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."

2. Metaphor is the shadow 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 applications:

In modern literature, especially light novels, it is often used as a metaphor for people's spiritual shadow and unpleasant atmosphere, or for things that cannot 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 comprehensively analyze and judge the weather background, sky conditions, air humidity, color and smell, satellite monitoring and other factors in order to draw a correct conclusion.

Haze 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 evenly in the air, which makes the air with horizontal visibility less than 10 km generally turbid, making bright objects in the distance slightly yellow and red, and making darker objects slightly blue."

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.

Sand blowing and sandstorm are both caused by the violent activity of large air flow, which brings up the surface dust 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 mostly occur in April-May every year. Take the northwest of China as an example. At this time of year, the Hawaiian high is formed in the Pacific Ocean, the Indian low is formed in the Asian continent, and the strong south wind blows from the ocean to the land. The Mongolian high, which controls the mainland, began to move westward and northward, where cold and warm air currents met, and the heavy Siberian cold current came rapidly from west to east, often forming strong winds. The wind force that forms sandstorms is generally above 8, and the wind speed is about 25 meters per second. In addition, the formation of sandstorms requires sufficient sand sources, and dust can be blown off the ground by the wind.