A 3D study on the amplification of regional haze and particle growth by local emissions
Abstract The role of new particle formation (NPF) events and their contribution to haze formation through subsequent growth in polluted megacities is still controversial. To improve the understanding of the sources, meteorological conditions, and chemistry behind air pollution, we performed simultan...
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2021
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oai:doaj.org-article:eb594d454ffd4a76b4a8359557fd49dd2021-12-02T13:36:42ZA 3D study on the amplification of regional haze and particle growth by local emissions10.1038/s41612-020-00156-52397-3722https://doaj.org/article/eb594d454ffd4a76b4a8359557fd49dd2021-01-01T00:00:00Zhttps://doi.org/10.1038/s41612-020-00156-5https://doaj.org/toc/2397-3722Abstract The role of new particle formation (NPF) events and their contribution to haze formation through subsequent growth in polluted megacities is still controversial. To improve the understanding of the sources, meteorological conditions, and chemistry behind air pollution, we performed simultaneous measurements of aerosol composition and particle number size distributions at ground level and at 260 m in central Beijing, China, during a total of 4 months in 2015–2017. Our measurements show a pronounced decoupling of gas-to-particle conversion between the two heights, leading to different haze processes in terms of particle size distributions and chemical compositions. The development of haze was initiated by the growth of freshly formed particles at both heights, whereas the more severe haze at ground level was connected directly to local primary particles and gaseous precursors leading to higher particle growth rates. The particle growth creates a feedback loop, in which a further development of haze increases the atmospheric stability, which in turn strengthens the persisting apparent decoupling between the two heights and increases the severity of haze at ground level. Moreover, we complemented our field observations with model analyses, which suggest that the growth of NPF-originated particles accounted up to ∼60% of the accumulation mode particles in the Beijing–Tianjin–Hebei area during haze conditions. The results suggest that a reduction in anthropogenic gaseous precursors, suppressing particle growth, is a critical step for alleviating haze although the number concentration of freshly formed particles (3–40 nm) via NPF does not reduce after emission controls.Wei DuLubna DadaJian ZhaoXueshun ChenKaspar R. DaellenbachConghui XieWeigang WangYao HeJing CaiLei YaoYingjie ZhangQingqing WangWeiqi XuYuying WangGuiqian TangXueling ChengTom V. KokkonenWei ZhouChao YanBiwu ChuQiaozhi ZhaSimo HakalaMona KurppaLeena JärviYongchun LiuZhanqing LiMaofa GePingqing FuWei NieFederico BianchiTuukka PetäjäPauli PaasonenZifa WangDouglas R. WorsnopVeli-Matti KerminenMarkku KulmalaYele SunNature PortfolioarticleEnvironmental sciencesGE1-350Meteorology. ClimatologyQC851-999ENnpj Climate and Atmospheric Science, Vol 4, Iss 1, Pp 1-8 (2021) |
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| collection |
DOAJ |
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EN |
| topic |
Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
| spellingShingle |
Environmental sciences GE1-350 Meteorology. Climatology QC851-999 Wei Du Lubna Dada Jian Zhao Xueshun Chen Kaspar R. Daellenbach Conghui Xie Weigang Wang Yao He Jing Cai Lei Yao Yingjie Zhang Qingqing Wang Weiqi Xu Yuying Wang Guiqian Tang Xueling Cheng Tom V. Kokkonen Wei Zhou Chao Yan Biwu Chu Qiaozhi Zha Simo Hakala Mona Kurppa Leena Järvi Yongchun Liu Zhanqing Li Maofa Ge Pingqing Fu Wei Nie Federico Bianchi Tuukka Petäjä Pauli Paasonen Zifa Wang Douglas R. Worsnop Veli-Matti Kerminen Markku Kulmala Yele Sun A 3D study on the amplification of regional haze and particle growth by local emissions |
| description |
Abstract The role of new particle formation (NPF) events and their contribution to haze formation through subsequent growth in polluted megacities is still controversial. To improve the understanding of the sources, meteorological conditions, and chemistry behind air pollution, we performed simultaneous measurements of aerosol composition and particle number size distributions at ground level and at 260 m in central Beijing, China, during a total of 4 months in 2015–2017. Our measurements show a pronounced decoupling of gas-to-particle conversion between the two heights, leading to different haze processes in terms of particle size distributions and chemical compositions. The development of haze was initiated by the growth of freshly formed particles at both heights, whereas the more severe haze at ground level was connected directly to local primary particles and gaseous precursors leading to higher particle growth rates. The particle growth creates a feedback loop, in which a further development of haze increases the atmospheric stability, which in turn strengthens the persisting apparent decoupling between the two heights and increases the severity of haze at ground level. Moreover, we complemented our field observations with model analyses, which suggest that the growth of NPF-originated particles accounted up to ∼60% of the accumulation mode particles in the Beijing–Tianjin–Hebei area during haze conditions. The results suggest that a reduction in anthropogenic gaseous precursors, suppressing particle growth, is a critical step for alleviating haze although the number concentration of freshly formed particles (3–40 nm) via NPF does not reduce after emission controls. |
| format |
article |
| author |
Wei Du Lubna Dada Jian Zhao Xueshun Chen Kaspar R. Daellenbach Conghui Xie Weigang Wang Yao He Jing Cai Lei Yao Yingjie Zhang Qingqing Wang Weiqi Xu Yuying Wang Guiqian Tang Xueling Cheng Tom V. Kokkonen Wei Zhou Chao Yan Biwu Chu Qiaozhi Zha Simo Hakala Mona Kurppa Leena Järvi Yongchun Liu Zhanqing Li Maofa Ge Pingqing Fu Wei Nie Federico Bianchi Tuukka Petäjä Pauli Paasonen Zifa Wang Douglas R. Worsnop Veli-Matti Kerminen Markku Kulmala Yele Sun |
| author_facet |
Wei Du Lubna Dada Jian Zhao Xueshun Chen Kaspar R. Daellenbach Conghui Xie Weigang Wang Yao He Jing Cai Lei Yao Yingjie Zhang Qingqing Wang Weiqi Xu Yuying Wang Guiqian Tang Xueling Cheng Tom V. Kokkonen Wei Zhou Chao Yan Biwu Chu Qiaozhi Zha Simo Hakala Mona Kurppa Leena Järvi Yongchun Liu Zhanqing Li Maofa Ge Pingqing Fu Wei Nie Federico Bianchi Tuukka Petäjä Pauli Paasonen Zifa Wang Douglas R. Worsnop Veli-Matti Kerminen Markku Kulmala Yele Sun |
| author_sort |
Wei Du |
| title |
A 3D study on the amplification of regional haze and particle growth by local emissions |
| title_short |
A 3D study on the amplification of regional haze and particle growth by local emissions |
| title_full |
A 3D study on the amplification of regional haze and particle growth by local emissions |
| title_fullStr |
A 3D study on the amplification of regional haze and particle growth by local emissions |
| title_full_unstemmed |
A 3D study on the amplification of regional haze and particle growth by local emissions |
| title_sort |
3d study on the amplification of regional haze and particle growth by local emissions |
| publisher |
Nature Portfolio |
| publishDate |
2021 |
| url |
https://doaj.org/article/eb594d454ffd4a76b4a8359557fd49dd |
| work_keys_str_mv |
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