南京市植物叶面颗粒物的黑碳含量及时空分布特征

发布时间：2018-10-18 07:03

【摘要】：黑碳是大气气溶胶的重要组成部分,能够吸收太阳辐射产生温室效应,并对人体健康产生负面影响。选取了南京市的6个典型功能区,研究不同污染水平和不同季节下植物叶面颗粒物黑碳含量的时空分布特征,并将其与地面尘和表层土壤中的黑碳含量进行比较,探讨黑碳在多介质中的分布规律。结果表明:(1)城市植物叶面颗粒物的黑碳含量呈现冬季秋季春季≈夏季的季节变化特征;(2)工业区植物叶面颗粒物的黑碳含量最高,并与其他功能区的差异达显著水平;(3)城市植物叶面颗粒物黑碳含量越高,BC/OC值也越大,城市植物叶面颗粒物的黑碳主要来源于化石燃料的燃烧;(4)黑碳气溶胶通过植被表层到达地表的过程中其含量逐渐下降,植物叶面颗粒物可作为监测大气黑碳污染的有效手段。
[Abstract]:Black carbon is an important component of atmospheric aerosols, which can absorb solar radiation to produce Greenhouse Effect and have a negative impact on human health. Six typical functional areas of Nanjing were selected to study the spatial and temporal distribution characteristics of black carbon content of plant leaf particulate matter under different pollution levels and seasons, and compared it with the black carbon content in ground dust and surface soil. The distribution of black carbon in multi-media is discussed. The results showed that: (1) the black carbon content of urban plant leaf particles showed the seasonal variation characteristics of winter and autumn spring 鈮，

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