气候变化领域集成服务门户(CCPortal): The impact of chlorine chemistry combined with heterogeneous N2O5 reactions on air quality in China

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DOI	10.5194/acp-22-3743-2022
	The impact of chlorine chemistry combined with heterogeneous N2O5 reactions on air quality in China
	Yang, Xiajie; Wang, Qiaoqiao; Ma, Nan; Hu, Weiwei; Gao, Yang; Huang, Zhijiong; Zheng, Junyu; Yuan, Bin; Yang, Ning; Tao, Jiangchuan; Hong, Juan; Cheng, Yafang; Su, Hang
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	3743
结束页码	3762
卷号	22 期号:6 页码:20
英文摘要	The heterogeneous reaction of N2O5 on Cl-containing aerosols (heterogeneous N2O5 + Cl chemistry) plays a key role in chlorine activation, NOx recycling, and consequently O-3 and PM2.5 formation. In this study, we use the GEOS -Chem model with additional anthropogenic and biomass burning chlorine emissions combined with updated parameterizations for the heterogeneous N2O5 + Cl chemistry (i.e., the uptake coefficient of N2O5 (gamma(N2O5)) and the CINO2 yield (phi(CINO2))) to investigate the impacts of chlorine chemistry on air quality in China, the role of the heterogeneous N2O5 + Cl chemistry, and the sensitivity of air pollution formation to chlorine emissions and parameterizations for gamma N2O5 and cociNO(2). The model simulations are evaluated against multiple observational datasets across China and show significant improvement in reproducing observations of particulate chloride, N2O5, and CINO2 when including anthropogenic chlorine emissions and updates to the parameterization of the heterogeneous N2O5 + Cl chemistry relative to the default model. The simulations show that total tropospheric chlorine chemistry could increase annual mean maximum daily 8 h average (MDA8) O-3 by up to 4.5 ppbv but decrease PM2.5 by up to 7.9 mu g M-3 in China, 83 % and 90 % of which could be attributed to the effect of the heterogeneous N2O5 + Cl chemistry. The heterogeneous uptake of N2O5 on chloride-containing aerosol surfaces is an important loss pathway of N2O5 as well as an important source of O-3 and hence is particularly useful in elucidating the commonly seen ozone underestimations relative to observations. The importance of chlorine chemistry largely depends on both chlorine emissions and the parameterizations for the heterogeneous N2O5 + Cl chemistry. With the additional chlorine emissions, the simulations show that annual MDA8 O-3 in China could be increased by up to 3.5 ppbv. The corresponding effect on PM2.5 concentrations varies largely with regions, with an increase of up to 4.5 mu gm(-3) in the North China Plain but a decrease of up to 3.7 mu g m(-3) in the Sichuan Basin. On the other hand, even with the same chlorine emissions, the effects on MDA8 O-3 and PM2.5 in China could differ by 48 % and 27 %, respectively, between different parameterizations.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000773403100001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273052
作者单位	Jinan University; Chinese Academy of Sciences; Guangzhou Institute of Geochemistry, CAS; Ocean University of China; Max Planck Society
推荐引用方式 GB/T 7714	Yang, Xiajie,Wang, Qiaoqiao,Ma, Nan,et al. The impact of chlorine chemistry combined with heterogeneous N2O5 reactions on air quality in China[J],2022,22(6):20.
APA	Yang, Xiajie.,Wang, Qiaoqiao.,Ma, Nan.,Hu, Weiwei.,Gao, Yang.,...&Su, Hang.(2022).The impact of chlorine chemistry combined with heterogeneous N2O5 reactions on air quality in China.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(6),20.
MLA	Yang, Xiajie,et al."The impact of chlorine chemistry combined with heterogeneous N2O5 reactions on air quality in China".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.6(2022):20.