Photodissociation of particulate nitrate as a source of daytime tropospheric Cl-2
文献类型：期刊论文
| 作者 | Peng, Xiang; Wang, Tao; Wang, Weihao; Ravishankara, A. R.; George, Christian; Xia, Men; Cai, Min ; Li, Qinyi; Salvador, Christian Mark; Lau, Chiho
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| 刊名 | NATURE COMMUNICATIONS
 |
| 出版日期 | 2022-02-17 |
| 卷号 | 13期号:1页码:939 |
| 关键词 | GAS-PHASE NO2 MOLECULAR CHLORINE SEA-SALT NITRYL CHLORIDE NITROUS-ACID AQUEOUS-SOLUTION RURAL SITE PHOTOLYSIS OZONE CHEMISTRY |
| 英文摘要 | Chlorine atoms (Cl) are highly reactive and can strongly influence the abundances of climate and air quality-relevant trace gases. Despite extensive research on molecular chlorine (Cl-2), a Cl precursor, in the polar atmosphere, its sources in other regions are still poorly understood. Here we report the daytime Cl-2 concentrations of up to 1 ppbv observed in a coastal area of Hong Kong, revealing a large daytime source of Cl-2 (2.7 pptv s(-1) at noon). Field and laboratory experiments indicate that photodissociation of particulate nitrate by sunlight under acidic conditions (pH < 3.0) can activate chloride and account for the observed daytime Cl-2 production. The high Cl-2 concentrations significantly increased atmospheric oxidation. Given the ubiquitous existence of chloride, nitrate, and acidic aerosols, we propose that nitrate photolysis is a significant daytime chlorine source globally. This so far unaccounted for source of chlorine can have substantial impacts on atmospheric chemistry. This study unravels an important daytime Cl-2 source in the extra-polar atmosphere and shows that photolysis of particle nitrate at high acidity produced unprecedented levels of Cl-2, boosting the oxidative power and air pollutants like O-3. |
| 源URL | [https://ir.rcees.ac.cn/handle/311016/47421]  |
| 专题 | 生态环境研究中心_大气污染控制中心 |
| 通讯作者 | Wang, Tao |
| 作者单位 | 1.Colorado State Univ, Dept Chem, Ft Collins, CO 80523 USA 2.Colorado State Univ, Dept Atmospher Sci, Ft Collins, CO 80523 USA 3.Hangzhou PuYu Technol Dev Co Ltd, Hangzhou 311300, Zhejiang, Peoples R China 4.China Natl Environm Monitoring Ctr, Dept Ambient Air Qual Monitoring, Beijing 100012, Peoples R China 5.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong 999077, Peoples R China |
| 推荐引用方式 GB/T 7714 | Peng, Xiang,Wang, Tao,Wang, Weihao,et al. Photodissociation of particulate nitrate as a source of daytime tropospheric Cl-2[J]. NATURE COMMUNICATIONS,2022,13(1):939. |
| APA | Peng, Xiang.,Wang, Tao.,Wang, Weihao.,Ravishankara, A. R..,George, Christian.,...&Chen, Jianmin.(2022).Photodissociation of particulate nitrate as a source of daytime tropospheric Cl-2.NATURE COMMUNICATIONS,13(1),939. |
| MLA | Peng, Xiang,et al."Photodissociation of particulate nitrate as a source of daytime tropospheric Cl-2".NATURE COMMUNICATIONS 13.1(2022):939. |
入库方式： OAI收割
来源：生态环境研究中心
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