昆明市城区不同区域环境空气负氧离子浓度变化特征分析

Variation Characteristics of Negative Oxygen Ion Concentration in Different Regions of Kunming City

选择昆明市主城区及周边具有代表性的居民密集区域和森林植被分布区域作为监测对象,对同一天气环境、不同时段的空气负氧离子浓度进行测定,探讨不同区域环境下空气负氧离子浓度变化特征。结果表明,不同区域环境空气负氧离子含量差异显著,森林植被好的区域空气负氧离子浓度高,空气质量好;在不同时段,上午空气负氧离子浓度最高,中午和下午负氧离子浓度低;在同一天内,森林植被好的区域空气负氧离子浓度日变化大,居民密集区空气负氧离子浓度日变化较小;空气负氧离子浓度与森林植被呈正相关关系,森林植被越好,负氧离子浓度越高,空气越清新。

The main urban area of Kunming City and its surrounding representative densely populated areas and forest vegetation distribution areas were selected as monitoring objects to measure the concentration of negative oxygen ions in the same weather environment and at different periods, and to explore the change characteristics of the concentration of negative oxygen ions in different regional environments. The results showed that the contents of negative oxygen ions were significantly different in different regions. The air quality was good with high concentration of negative oxygen ions in areas with good forest vegetation. In different periods, the concentration of negative oxygen ions was the highest in the morning but the lowest at noon and in the afternoon. On the same day, the diurnal variation of negative oxygen ion concentration was large in the areas with good forest vegetation but small in the densely populated areas. The concentration of negative oxygen ions was positively correlated with forest vegetation. The better the forest vegetation was, the higher the concentration of negative oxygen ions was and the fresher the air was.