Abstract
By choosing a typical urban green space in Jilin City as the studying object, the meteorological factors were monitored from different aspects including aero-anion concentration, temperature, relative humidity, wind direction, air pressure. Based on the data analyzed, the research was done aiming at finding daily variations in air anion levels of urban green space and air anion concentration and its correlation with meteorological factors, which lays a foundation on further explore of the impact of negative air ion levels in the environmental factors and plants. The results are as follows: two peak curves were observed for changes of urban green space aero-anion levels in daytime: in the early morning and at midnight; The level of aero-anion concentration was negatively correlated with air humidity.
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