GSTDTAP  > 地球科学
DOI10.1016/j.atmosres.2021.105490
Changes of Ammonia Concentrations in Wintertime on the North China Plain from 2018 to 2020
Yuexin He, Yuepeng Pan, Mengna Gu, Qian Sun, ... Yuesi Wang
2021-01-28
发表期刊Atmospheric Research
出版年2021
英文摘要

The reduced economic and social activities during the Chinese Spring Festival provide a unique experiment to evaluate reductions in anthropogenic NH3 emissions in China. However, quantifying this unique scenario is challenging as meteorology may mask the real changes in observed NH3 concentrations. Here, we applied a machine learning technique to decouple the effects of meteorology and confirmed that the real (deweathered) NH3 concentration dropped to a minimum during the Spring Festival in 2019 and 2020 at both urban (Beijing) and rural (Xianghe) sites on the North China Plain. Compared with the scenario without the Spring Festival effect in 2020, we predicted NH3 concentrations that were 39.8% and 24.6% higher than the observed values at the urban and rural sites, respectively. The significant difference between the two sites indicates a larger reduction in anthropogenic NH3 emissions in urban areas than in rural areas due to the Spring Festival and lockdown measures of COVID-19. Future control strategies should consider the emissions of NH3 from the transportation, industrial and residential sectors, considering that agricultural emissions are minor in cold seasons.

领域地球科学
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文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/313599
专题地球科学
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Yuexin He, Yuepeng Pan, Mengna Gu, Qian Sun, ... Yuesi Wang. Changes of Ammonia Concentrations in Wintertime on the North China Plain from 2018 to 2020[J]. Atmospheric Research,2021.
APA Yuexin He, Yuepeng Pan, Mengna Gu, Qian Sun, ... Yuesi Wang.(2021).Changes of Ammonia Concentrations in Wintertime on the North China Plain from 2018 to 2020.Atmospheric Research.
MLA Yuexin He, Yuepeng Pan, Mengna Gu, Qian Sun, ... Yuesi Wang."Changes of Ammonia Concentrations in Wintertime on the North China Plain from 2018 to 2020".Atmospheric Research (2021).
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