Tropospheric Ozone Perturbations Induced by Urban Land Expansion in China from 1980 to 2017
2022
Zhang, Xiaodong | Jian, Xiaohu | Zhao, Yuan | Liu, Xinrui | Chen, Kaijie | Wang, Linfei | Tao, Shu | Liu, Junfeng | Huang, Tao | Gao, Hong | Liu, Yijie | Zhugu, Ruiru | Ma, Jianmin
Urbanization perturbs air pollutants from a dynamic and thermodynamic perspective, which has inspired extensive investigations in China due to rapid urban land expansion in the past four decades. However, knowledge gaps remain in the long-term and nationwide responses to air pollutants to urbanization. The evolution of tropospheric ozone associated with urban land expansion across China was assessed from 1980 to 2017 using a coupled WRF-Chem model based on a recently updated land use change (LUC) data set. The results revealed that urban-land expansion drove growing ozone trends for this period and contributed about 3–9% to its summer maximum concentrations during the 2010s in major urban agglomerations across China. The association between a long-term change in summer O₃ concentrations and LUC after excluding the effect of precursor emissions and meteorological conditions and causes of interannual (short-term) variations in O₃ concentrations induced by urban-land expansion were also explored by examining the relationships between ozone fluctuations and meteorological variables.
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