Estimation of background concentration of PM in Beijing using a statistical integrated approach
Estimation of background concentration of PM in Beijing using a statistical integrated approach
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DOI：
10.1016/j.apr.2018.12.014
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发表时间：
2019-05-01
影响因子：
4.5
通讯作者：
Bai, Zhipeng
中科院分区：
文献类型：
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作者：
Gao, Shuang;Cong, Zhiyuan;Bai, Zhipeng
中国大气中颗粒物（PM10和PM2.5）的高浓度已成为公众健康关注的焦点。因此，为了制定高效和有效的环境控制政策，了解PM背景浓度至关重要。在这项研究中，我们使用综合方法，包括气象滤波、反向轨迹建模、光谱分析和Kolmogorov-Zurbenko （KZ）滤波器，估算了2016年1月至12月北京PM10和PM2.5的背景浓度。PM10的年平均背景浓度估计为47 μ g/m(3)（范围从37到71 μ g/m(3)），而PM2.5的年平均背景浓度为25 μ g/m(3)（范围从18到37 μ g/m(3)）。背景污染对环境PM浓度的贡献PM10为37-68%，PM2.5为21-54%，与其他研究结果相当。本研究估计的背景浓度使用北京市环保局发布的社区多尺度空气质量结果进行评估。该方法在估算PM污染物方面具有很大的潜力，也可应用于其他污染物的估算。
The high concentrations of particulate matter (PM10, and PM2.5) air pollutants in China are of great concern to public health. To develop efficient and effective environment control policies, an understanding of PM background concentrations is therefore essential. In this study, we estimated background concentrations of PM10, and PM2.5 in Beijing from January to December 2016, using an integrated approach that involved meteorological filtering, backward trajectory modelling, spectral analysis and a Kolmogorov-Zurbenko (KZ) filter. The estimated annual average background concentration of PM10, was 47 mu g/m(3) (ranging from 37 to 71 mu g/m(3)), while PM2.5 averaged 25 mu g/m(3) (ranging from 18 to 37 mu g/m(3)). The contribution of background pollution to the ambient concentration of PM was 37-68% for PM10, and 21-54% for PM2.5, which is comparable to other studies. The estimated background concentrations from this study were assessed using the Community Multi-scale Air Quality results published by Beijing Municipal Environmental Protection Bureau. Our method has great potential for estimating PM pollutants and could also be applied to other pollutants.