影响北仑区域能见度的因素研究

Study on Influence Factors of Regional Visibility of Beilun District

利用对北仑区域内的气溶胶散射系数、气溶胶浓度、黑炭浓度以及NO2浓度的监测和分析,对区域影响能见度的的因素进行了研究,研究结果表明,影响能见度的消光系数主要由气溶胶的散射、气溶胶的吸收,干洁大气的散射和气态污染物的吸收四项组成,且组成比例总体稳定,但是,不同空气质量级别和灰霾天与非灰霾天之间的消光系数值及组成差异较大;通过对气溶胶与光散射系数的拟合得到,两者存在较好的正相关性。

The influence factors of regional visibility were studied on the basis of monitoring and analysing of aerosol scattering coefficient, aerosol concentration, black carbon concentration and NO2 concentration in Beilun district. The result showed that the extinction coefficient which affected visibility is contributed by four factors of aerosol scattering, aerosol absorption, dry air scattering and gaseous pollutants adsorption. The proportion of the four factors was stable. The figure and components of extinction coefficient for different levels of air quality, haze days and non haze days were quite different. Through data fitting, good positive correlations were found between aerosol concentration and extinction coefficient.