首页|Underestimated benefits of NOx control in reducing SNA and 03 based on missing heterogeneous HONO sources

Underestimated benefits of NOx control in reducing SNA and 03 based on missing heterogeneous HONO sources

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Substantial NOx emission mitigation is crucial for the synergistic reduction of particulate matter and ozone(O3)pollution in China.The traditional air quality model does not consider heterogeneous HONO chemistry,leading to uncertainties in estimating the benefits of NOx control.Previous studies have shown that the parameterization of heterogeneous HONO formation increases both the simulated value of sulfate-nitrate-ammonium(SNA)and that of O3,thus adding the heterogeneous reactions of HONO into air quality models inevitably leads to changes in the estimated benefits of NOx abatement.Here we investigated the changes in SNA and O3 concentrations from NOx emission reduction before and after adding heterogeneous HONO reactions in the Community Multi-Scale Air Quality(CMAQ)model.Including heterogeneous HONO reactions in the simulation improved the benefits of NOx reduction in terms of SNA control in winter.With 80％NOx reduction,the reduction in SNA increased from 36.9％without considering heterogeneous HONO reactions to 42.8％with heterogeneous HONO chemistry.The reduction in the maximum daily 8h average(MDA8)O3 in summer caused by NOx reduction increased slightly from 4.7％to 5.2％after adding heterogeneous HONO reactions.The results in this study highlight the enhanced effectiveness of NOx controls for the reduction of SNA and O3 after considering heterogeneous HONO formation in a complex chemical ambient,demonstrating the importance of NOx controls in reducing PM2.5 and O3 pollution in China.

Heterogeneous HONONOx reductionPM2.5O3

Shuping Zhang、Haotian Zheng、Jun Liu、Yao Shi、Tianzeng Chen、Chaoyang Xue、Fenfen Zhang、Yueqi Jiang、Xiangping Zhang、Shovan Kumar Sahu、Biwu Chu、Jia Xing

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State Key Joint Laboratory of Environment Simulation and Pollution Control,School of Environment,Tsinghua University,Beijing 100084,China

China Academy of Civil Aviation Science and Technology,Beijing 100028,China

State Key Joint Laboratory of Environment Simulation and Pollution Control,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China

Yellow River Institute of Hydraulic Research,Zhengzhou 450003,China

Centre for Climate Research Singapore,Meteorological Service Singapore,Singapore 537054,Singapore

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Innovation Platform for Academicians of Hainan Province国家重点研发计划国家自然科学基金Excellent Young Talents Project of Yellow River Conservancy CommissionResearch and Development Project of Yellow River Institute of Hydraulic Researchthe"Explorer 100"cluster system of Tsinghua National Laboratory for Information Science and Technology

YSPTZX2022052022YFC370340422276205HQK-202313HKY-YF-2022-02

2024

10.1007/s11783-024-1790-y

环境科学与工程前沿
高等教育出版社

环境科学与工程前沿

影响因子：0.545
ISSN：2095-2201
年,卷(期)：2024.18(3)
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