摘要
以湖南省长沙市为研究区域,对城市环境空气中的PM2.5和NO2浓度进行自动监测,并对数据进行相关性分析。结果表明,PM2.5和NO2浓度的季节性变化大,且两者的变化规律一致,均为冬季>秋季>春季>夏季;在一天内,NO2浓度的最低值一般出现在午后,但PM2.5浓度的最低值、峰值出现时间不确定;就功能区分布而言,NO2浓度最高值出现在商业区,而PM2.5浓度分布的区域规律不明显。PM2.5与NO2浓度变化以正相关为主,PM2.5浓度高时,NO2浓度高,反之亦然,两者容易产生叠加污染。总体上,冬、秋季节为PM2.5和NO2主要控制季节。
The concentrations of PM2.5 and NO2 in Changsha City of Hunan Province was monitored automatically. The corre- lation between PM2.5 and NO2 was also analyzed. The results showed that the concentrations of PM2.5 and NO2 changed significant- ly with seasons. The seasonal changes of PM2.4 and NO2, the concentration of large, seasonal variation, as winter 〉 autumn 〉 spring 〉 concentration in summer. In terms of daily variation, the lowest concentration of NO2 generally appeared in the after- noon, the peak and low values of PM2.5 concentration were not obvious. In different functional areas, the highest concentration of NO2 was in the business district, the PM2.5 rule was not obvious. PM2.5 and NO2 concentration changed in positive correlation. High concentration of PM2.5 often coexists with high NO2 concentration, and vice versa. It is easy to produce pollution overlay. On the whole, winter and autumn usually suffers from severe PM2.5 and NO2 pollution,
出处
《环境科学与管理》
CAS
2014年第10期68-72,共5页
Environmental Science and Management
