五指山市荣最岭空气负离子昼间变化特征

Diurnal Variation of Negative Air Ions in Rongzui Mountain of Wuzhishan

为研究五指山市荣最岭空气负离子的昼间变化特征，对海南热带海洋学院五指山北校区树林的空气正、负离子浓度和空气温度、相对湿度等环境因子进行了同步监测，并做相关性分析．结果表明：空气负离子浓度表现为早上和傍晚较高，下午较低；随空气温度升高而减小，且与温度呈显著的负相关；随相对湿度增加而增大，但相关性不显著．利用空气离子单极系数及安倍空气质量评价指数对荣最岭空气清洁度进行初步评价，表明荣最岭空气舒适度和清洁度高，除10：00受人类活动影响较大外，空气清洁度均在A级或B级．

In order to investigate the diurnal variation of negative air ions in Rongzui mountain in Wuzhishan, by choosing the woods on the north campus of Hainan Tropical Ocean University as a monitoring spot, the concentration of positive and negative air ions, temperature, relative humidity were measured simuhaneously. The results indicated that the negative ions concentration, high in the morning and at dusk in contrast to the lower level in the afternoon, has a remarkably negative correlation with the variation of temperature in Rongzui moun- tain. And the concentration of negative air ions increased with the rise of relative humidity, but the correlation was not obvious. Air quality was assessed with ion polarity ratio and air ion assessment index. During most of the daytime, it showed that the air quality in Rongzui mountain ranked around level A and B. However, at 10：00, the air quality was more or less affected by human activities.