What is inversion? Why does high humidity exacerbate air pollution?

We all know what it is

Foggy weather and smog weather

It also learned about one of the three major factors that affect air quality

Calm the weather

So, what is inversion?

Why does high humidity exacerbate air pollution?

Let's take a look

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What is inversion?

Under normal circumstances, the ground temperature is high, the high altitude temperature is low, and the air flows from bottom to top, which helps the pollutants to spread vertically. But in the event of a temperature inversion, the situation is just the opposite, the high altitude temperature is higher than the ground, the vertical rise of the air is blocked, like a pot lid over the area, and the pollutants are difficult to spread.

The high humidity environment is conducive to the conversion of gaseous pollutants such as sulfur dioxide, nitrogen oxides and ammonia into particulate matter of nitrate, sulfate, ammonium salt and other components, aggravating PM2.5 pollution.