北京黑碳气溶胶变化特征及来源分析

Variation characteristics and source analysis of black carbon aerosol in Beijing

为探究北京黑碳气溶胶的变化规律和污染来源,文章利用北京市观象台黑碳仪2018年的观测数据进行研究,并结合气象资料及环境资料进行分析。结果表明:北京市黑碳质量浓度呈现春、夏季低,秋、冬季高的变化特点,同时黑碳质量浓度的日变化明显,呈现夜间高、日间低的变化趋势。黑碳气溶胶来源主要为化石燃料的燃烧,受到的偏南方向污染的影响大于偏北方向,主要的潜在源区包括河北南部、山东西北部及北京南部。

In order to explore the variation law and pollution source of black carbon aerosol in Beijing,the autor of this paper uses the observation data of the black carbon instrument of Beijing Observatory in 2018 to study and analyse with meteorological data and environmental data.The results show that the mass concentration of black carbon in Beijing is low in spring and summer,and high in autumn and winter.At the same time,the diurnal variation of black carbon mass concentration is obvious,showing a trend of high at night and low during the day.The main source of black carbon aerosol is the combustion of fossil fuels,and the impact of pollution in the southunrd direction is greater than that in the northward direction.The major potential source regions are located in southern Hebei,northwestern Shandong and southern Beijing.