| Autor: |
Hu, Weiyang, Zhao, Yu, Lu, Ni, Wang, Xiaolin, Zheng, Bo, Henze, Daven K., Zhang, Lin, Fu, Tzung-May, Zhai, Shixian |
| Zdroj: |
Environmental Science & Technology; January 2024, Vol. 58 Issue: 1 p628-638, 11p |
| Abstrakt: |
China’s industrial restructuring and pollution controls have altered the contributions of individual sources to varying air quality over the past decade. We used the GEOS-Chem adjoint model and investigated the changing sensitivities of PM2.5and ozone (O3) to multiple species and sources from 2010 to 2020 in the central Yangtze River Delta (YRDC), the largest economic region in China. Controlling primary particles and SO2from industrial and residential sectors dominated PM2.5decline, and reducing CO from multiple sources and ≥C3alkenes from vehicles restrained O3. The chemical regime of O3formation became less VOC-limited, attributable to continuous NOXabatement for specific sources, including power plants, industrial combustion, cement production, and off-road traffic. Regional transport was found to be increasingly influential on PM2.5. To further improve air quality, management of agricultural activities to reduce NH3is essential for alleviating PM2.5pollution, while controlling aromatics, alkenes, and alkanes from industry and gasoline vehicles is effective for O3. Reducing the level of NOXfrom nearby industrial combustion and transportation is helpful for both species. Our findings reveal the complexity of coordinating control of PM2.5and O3pollution in a fast-developing region and support science-based policymaking for other regions with similar air pollution problems. |
| Databáze: |
Supplemental Index |
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