Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-20-7667-2020 |
Effects of atmospheric circulations on the interannual variation in PM2.5 concentrations over the Beijing-Tianjin-Hebei region in 2013-2018 | |
Wang, Xiaoyan1,2,3; Zhang, Renhe1,2,3 | |
2020-07-02 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2020 |
卷号 | 20期号:13页码:7667-7682 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | The Chinese government has made many efforts to mitigate fine particulate matter pollution in recent years by taking strict measures on air pollutant reduction, which has generated the nationwide improvements in air quality since 2013. However, under the stringent air pollution controls, how the wintertime PM2.5 concentration (i.e., the mass concentration of atmospheric particles with diameters less than 2.5 mu m) varies and how much the meteorological conditions contribute to the interannual variations in PM2.5 concentrations are still unclear, and these very important for the local government to assess the emission reduction of the previous year and adjust mitigation strategies for the next year. The effects of atmospheric circulation on the interannual variation in wintertime PM2.5 concentrations over the Beijing-Tianjin-Hebei (BTH) region in the period of 2013-2018 are evaluated in this study. Generally, the transport of clean and dry air masses and an unstable boundary layer in combination with the effective near-surface horizontal divergence or pumping action at the top of the boundary layer benefits the horizontal or vertical diffusion of surface air pollutants. Instead, the co-occurrence of a stable boundary layer, frequent air stagnation, positive water vapor advection and deep near-surface horizontal convergence exacerbate the wintertime air pollution. Favorable circulation conditions lasting for 2-4 d are beneficial for the diffusion of air pollutants, and 3-7 d of unfavorable circulation events exacerbates the accumulation of air pollutants. The occurrence frequency of favorable circulation events is consistent with the interannual variation in seasonal mean PM2.5 concentrations. There is better diffusion ability in the winters of 2014 and 2017 than in other years. A 59.9% observed decrease in PM2.5 concentrations in 2017 over the BTH region could be attributed to the improvement in atmospheric diffusion conditions. It is essential to exclude the contribution of meteorological conditions to the variation in interannual air pollutants when making a quantitative evaluation of emission reduction measurements. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000546685700002 |
WOS关键词 | AIR-QUALITY ; ANTHROPOGENIC EMISSIONS ; PARTICULATE MATTER ; EASTERN CHINA ; HAZE POLLUTION ; NORTH CHINA ; AEROSOL CONCENTRATIONS ; SEASONAL VARIABILITY ; OPTICAL-PROPERTIES ; ORGANIC AEROSOL |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/281729 |
专题 | 地球科学 |
作者单位 | 1.Fudan Univ, Dept Atmospher & Ocean Sci, Shanghai, Peoples R China; 2.Fudan Univ, Inst Atmospher Sci, Shanghai, Peoples R China; 3.Fudan Univ, Big Data Inst Carbon Emiss & Environm Pollut, Shanghai, Peoples R China |
推荐引用方式 GB/T 7714 | Wang, Xiaoyan,Zhang, Renhe. Effects of atmospheric circulations on the interannual variation in PM2.5 concentrations over the Beijing-Tianjin-Hebei region in 2013-2018[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2020,20(13):7667-7682. |
APA | Wang, Xiaoyan,&Zhang, Renhe.(2020).Effects of atmospheric circulations on the interannual variation in PM2.5 concentrations over the Beijing-Tianjin-Hebei region in 2013-2018.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(13),7667-7682. |
MLA | Wang, Xiaoyan,et al."Effects of atmospheric circulations on the interannual variation in PM2.5 concentrations over the Beijing-Tianjin-Hebei region in 2013-2018".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.13(2020):7667-7682. |
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