| 摘 要： |
Regional ozone (O-3) pollution has currently become an urgent air pollution problem in China. Nitrogen oxides (NOX) are key precursor pollutants for O-3 formation. However, pollution control policies have generally neglected or simplified the impacts of soil NOX emissions in rural regions. This study aims to evaluate the effect of soil NOX emissions on O-3 in agricultural areas of China based on high-resolution soil NOX emission inventory and the WRF-Chem air quality model. We first validate the simulation result of the O-3 concentration with surface O-3 observations over China using the selected optimal physicochemical scheme. After that, four scenarios are designed to simulate and analyze the regional sensitivity of O-3 to soil NOX emissions and to quantify the effect of soil NOX emissions on O-3 concentration. The results indicate that as soil NOX emissions increase, the overall spatial pattern does not change notably over mainland China, but the O-3 concentration increases remarkably in the northwest and northeast of China. Additionally, we discover that changes of O-3 concentration across mainland China differ substantially among regions. Our results highlight the effect of soil NOX emissions on air quality in agricultural areas. The control of O-3 pollution in China should take into account the comprehensive consequences of various emission sources, as well as their regional differences. |
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