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- W4313358308 abstract "On-road ammonia (NH3) emissions play a significant role in fine particulate matter (PM2.5) formation in urban areas, posing severer risks for human health. Limited studies have depicted the spatial and temporal variations of on-road NH3 emissions, in particular lacking detailed quantification of their contributions within densely-populated areas. In this study, we established a comprehensive vehicular NH3 emission model and compiled a gridded on-road NH3 emission inventory with high spatial (3 km × 3 km), and temporal (monthly) resolutions for mainland China. China’s annual vehicular NH3 emissions are estimated to increase from 32.8 kt to 87.1 kt during the period of 2000–2019. Vehicular NH3 emissions are significantly concentrated in densely-populated areas where agricultural emissions have relatively lower intensity. It is found that vehicular NH3 emissions could exceed agricultural emissions in the grids containing 23.0 % of the Chinese population in 2019 (approximately 326.6 million people), and this ratio is up to 29.4 % in winter. For extreme populous megacities such as Beijing and Shanghai, vehicular NH3 emissions exceed agricultural emissions where 69.2 % and 72.0 % of population resides, respectively. Thus, the significant role of on-road NH3 emissions in populated areas may have been underappreciated. This study gave a better insight into the absolute value and relative importance of on-road NH3 emissions in different regions, seasons and population densities in China, which is important in terms of the air quality implications." @default.
- W4313358308 created "2023-01-06" @default.
- W4313358308 date "2022-12-30" @default.
- W4313358308 modified "2023-10-17" @default.
- W4313358308 title "Comment on acp-2022-828" @default.
- W4313358308 doi "https://doi.org/10.5194/acp-2022-828-rc1" @default.
- W4313358308 hasPublicationYear "2022" @default.
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