Sulfur Dioxide Transported From the Residual Layer Drives Atmospheric Nucleation During Haze Periods in Beijing
Sulfur Dioxide Transported From the Residual Layer Drives Atmospheric Nucleation During Haze Periods in Beijing
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DOI：
10.1029/2022gl100514
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发表时间：
2023-03
影响因子：
5.2
通讯作者：
Yonghong Wang;Yongjing Ma;Chao Yan;L. Yao;Runlong Cai;Shuying Li;Zhuohui Lin;Xiujuan Zhao;Rujing Yin;C. Deng;J. Kangasluoma;Xucheng He;S. Hakala;Xiaolong Fan;Siyu Chen;Qingxin Ma;V. Kerminen;T. Petäjä;J. Xin;Lin Wang;Baoxian Liu;Weigang Wang;Maofa Ge;Jingkun Jiang;Yongchun Liu;Federico Bianchi;Biwu Chu;N. Donahue;S. Martin;Hong S. He;M. Kulmala
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文献类型：
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作者：
Yonghong Wang;Yongjing Ma;Chao Yan;L. Yao;Runlong Cai;Shuying Li;Zhuohui Lin;Xiujuan Zhao;Rujing Yin;C. Deng;J. Kangasluoma;Xucheng He;S. Hakala;Xiaolong Fan;Siyu Chen;Qingxin Ma;V. Kerminen;T. Petäjä;J. Xin;Lin Wang;Baoxian Liu;Weigang Wang;Maofa Ge;Jingkun Jiang;Yongchun Liu;Federico Bianchi;Biwu Chu;N. Donahue;S. Martin;Hong S. He;M. Kulmala
新粒子形成（NPF）是一种对气候有重大影响的全球性现象。NPF还造成了雾霾，对人体健康有明显的负面影响。理论和观测都表明，由于高的预先存在的冷凝汇（CS），在晴天成核更有利，而在雾霾期间则受到抑制。本研究表明，北京雾霾天NPF的惊人出现与高浓度硫酸二聚体有关。通过野外观测和模式模拟，我们发现来自高空残余层的二氧化硫（SO2）向下混合增强了地面水平的SO2，这反过来又提高了污染空气中SO2快速氧化后的硫酸二聚体。我们的研究结果解决了特大城市北京雾霾条件下SO2来源及其大气氧化产物之间的关键差距，提供了描述污染大气中NPF的完整链中的缺失环节。
New particle formation (NPF) is a global phenomenon that significantly influences climate. NPF also contributes to haze, with pronounced negative impacts on human health. Theory and observations both show that nucleation is favored during clean days and inhibited during haze episodes due to a high pre‐existing condensation sink (CS). Here we show that the surprising occurrence of NPF during haze days in Beijing is associated with a high concentration of sulfuric acid dimers. With both field observations and model simulations, we demonstrate that downward mixing of sulfur dioxide (SO2) from the residual layer aloft enhances ground level SO2, which in turn elevates sulfuric acid dimer after rapid SO2 oxidation in the polluted air. Our results address a key gap between the source of SO2 and its atmospheric oxidation products during haze conditions in a megacity, Beijing, providing a missing link in a complete chain describing NPF in the polluted atmosphere.