Abstract:

Based on atmospheric monitoring data including SO₂, NO₂ and PM₁₀ from 2006 to 2012 in Qingdao, temporal and spatial distributions of three main air pollutants and their correlations with the simultaneous meteorological elements were analyzed. Variation of meteorological conditions in pollution days was discussed. The result shows that the number of annual mean air pollution days are 23-33 in Qingdao, most of which occurs in winter and spring. PM₁₀ is the primary atmospheric pollutant in Qingdao. Air pollution above the median level in Qingdao is mainly from PM₁₀, which is mostly caused by external floating dust. Pollutant concentration is a negative correlation with cloud cover, precipitation and air temperature and positive correlation with air pressure. Air quality worsens during foggy days in winter, while the sea fog from April to June improves the air quality in Qingdao. Air pollution is easily induced by the existence of weak surface pressure pattern with the temperature inversion layer near ground and prolonged smog or haze in Qingdao.

Key words: Air pollution, Meteorological condition, Floating dust, Sea fog