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Abstract
With the progress of society, people more and more pay attention to the air quality. The automatic monitor has become the main technical method of city air quality monitor. In the outermost layer of the atmosphere, the sunlight radiation is relatively fixed. When the sunlight go through the atmosphere, it will be scattered and absorbed by dust, suspended particulates, respirable suspended particulates (PM10), NO2, SO2, CO and O3. That the luminous intensity and spectrum will change. The air ingredient's and the meteorological condition's change can be reflected by the sunlight's change. In this paper, we try to monitor the air quality by the sunlight intensity. We discuss the possibility whether we can get the atmosphere's change through survey the sunlight's change. The result shows that it is promising for developing air quality monitor by the sunlight.
Keywords: air quality; sunlight; intensity; automatic monitor system