Abstract:Based on the take-off and landing data of Chinese civil aviation aircrafts from 2019 to 2021, the aircraft engine emission factor database of International Civil Aviation Organization (ICAO), and Aircraft Data Base database (BADA) of EUROCONTROL, the high-resolution air pollutants and carbon emission inventories during the entire flight process of Chinese civil aviation aircrafts from 2019 to 2021 were developed from bottom to up. Next, their spatial distribution characteristics in different geographical regions in China were analyzed, where the emerging impacts of the novel coronavirus infection from 2019 to 2021 was further explored. According to the results, the total HC, CO, NOx, and CO2 emissions of China's civil aviation aircrafts in 2019 were 0.74, 6.38, 33.98, and 7785.05million tons, respectively. Also, during the take-off and landing (LTO) cycle stage, the HC, CO, NOx, and CO2 emissions made up 37.84%, 55.02%, 18.83%, and 18.31% of the total emissions, respectively. Specially, Eastern China region had the highest aviation carbon emissions, accounting for 27.20% of the whole country's emissions. Last, the total air pollution emissions decreased from 2019 to 2021, where the CO2 emissions in 2020 and 2021 were reduced by 17.26% and 10.38%, respectively.
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