Distribution characteristics and law of negative air ions in typical garden flora areas of Beijing

Abstract

By using the ITC-201A intelligent portable negative air ion detector, the concentration of air anions was detected at typical sites with garden flora in Beijing, such as Xiangshan Park, the Summer Palace, Beijing Botanical Garden and the downtown area. The spatial and dynamic change pattern was analyzed. The results showed that the presence of garden flora can significantly increase the concentration of air anions. The concentrations of air anions in areas with garden flora were three and ten times higher than that in areas without garden flora, in clearings and downtown, respectively. The annual average value was sorted in descending order as Xiangshan Park (630.25 pc./cm