Updating and evaluating the NH3 gas-phase chemical mechanism of MOZART-4 in the WRF-Chem model
The accuracy of determining atmospheric chemical mechanisms is a key factor in air pollution prediction, pollution-cause analysis and the development of control schemes based on air quality model simulations. However, the reaction of NH and OH to generate NH and its subsequent reactions are often ignored in the MOZART-4 chemical mechanism. To solve this problem, the gas-phase chemical mechanism of NH was updated in this study. Response surface methodology (RSM), integrated gas-phase reaction rate (IRR) diagnosis and process analysis (PA) were used to quantify the influence of the updated NH chemical mechanism on the O simulated concentration, the nonlinear response relationship of O and its precursors, the chemical reaction rate of O generation and the meteorological transport process. The results show that the updated NH chemical mechanism can reduce the error between the simulated and observed O concentrations and better simulate the O concentration. Compared with the Base scenario (original chemical mechanism simulated), the first-order term of NH in the Updated scenario (updated NH chemical mechanism simulated) in RSM passed the significance test (p < 0.05), indicating that NH emissions have an influence on the O simulation, and the effects of the updated NH chemical mechanism on NOx-VOC-O in different cities are different. In addition, the analysis of chemical reaction rate changes showed that NH can affect the generation of O by affecting the NOx concentration and NOx circulation with radicals of OH and HO in the Updated scenario, and the change of pollutant concentration in the atmosphere leads to the change of meteorological transmission, eventually leading to the reduction of O concentration in Beijing. In conclusion, this study highlights the importance of atmospheric chemistry for air quality models to model atmospheric pollutants and should attract more research focus.
Lanzhou Science and Technology Bureau[2022-2-15];
|WOS Accession No|
|ESI Research Field|
Cited Times [WOS]:0
|Document Type||Journal Article|
|Department||School of Environmental Science and Engineering|
1.Key Laboratory for Semi-Arid Climate Change of the Ministry of Education,College of Atmospheric Sciences,Lanzhou University,Lanzhou,730000,China
2.Lanzhou University Applied Technology Research Institude Co.,Ltd,Lanzhou,730000,China
3.Faculty of Geosciences and Environmental Engineering,Southwest Jiaotong University,Chengdu,611756,China
4.School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
5.Ordos Meteorological Bureau of Inner Mongolia,Ordos,017000,China
Li，Guangyao,Chen，Qiang,Sun，Wei,et al. Updating and evaluating the NH3 gas-phase chemical mechanism of MOZART-4 in the WRF-Chem model[J]. Environmental Pollution,2023,333.
Li，Guangyao.,Chen，Qiang.,Sun，Wei.,She，Jing.,Liu，Jia.,...&Liu，Mingyue.(2023).Updating and evaluating the NH3 gas-phase chemical mechanism of MOZART-4 in the WRF-Chem model.Environmental Pollution,333.
Li，Guangyao,et al."Updating and evaluating the NH3 gas-phase chemical mechanism of MOZART-4 in the WRF-Chem model".Environmental Pollution 333(2023).
|Files in This Item:||There are no files associated with this item.|
|Recommend this item|
|Export to Endnote|
|Export to Excel|
|Export to Csv|
|Similar articles in Google Scholar|
|Similar articles in Baidu Scholar|
|Similar articles in Bing Scholar|
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.