Air stagnation is a phenomenon which occurs when an air mass remains over an area for an extended period. Stagnation events strongly correlates with poor air quality. Due to light winds and lack of precipitation, pollutants cannot be cleared from the air, either gaseous (such as ozone) or particulate (such as soot or dust).
Air stagnation occurs when an air mass persists over a particular area for an extended duration. Stagnant episodes are frequently linked to poor atmospheric conditions. The lack of wind and precipitation prevents the removal of pollutants from the atmosphere, including gases like ozone and particulates such as soot or dust.