气候变化领域集成服务门户(CCPortal): Meteorological Change and Impacts on Air Pollution: Results From North China

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DOI	10.1029/2020JD032423
	Meteorological Change and Impacts on Air Pollution: Results From North China
	Xu Z.; Chen S.X.; Wu X.
发表日期	2020
ISSN	2169897X
卷号	125 期号:16
英文摘要	There have been speculations that the severe air pollution experienced in North China was the act of meteorological change in general and a decreasing northerly wind in particular. We conduct a retrospective analysis on 1979–2016 reanalysis data from ERA-Interim of European Centre for Medium-Range Weather Forecasts over a region in North China to detect meteorological changes over the 38 years. No significant reduction in the northerly wind within the mixing layer is detected. Statistically significant increases are detected in the surface temperature, boundary layer height and dissipation, and significant decreases in relative humidity in the region between the first and second 19-year periods from 1979 to 2016. We build regression models of PM2.5 on the meteorological variables using data in 2014, 2015, and 2016 to quantify effects of the meteorological changes between the two 19-year periods on PM2.5 under the emission scenarios of 2014–2016. It is found that despite the warming, dew point temperature had been largely kept under control as the region had gotten dryer. This made the effects of temperature warming largely favorable to PM2.5 reduction as it enhances boundary layer height and dissipation. It is found that the meteorological changes would lead to 1.29% to 2.76% reduction in annual PM2.5 averages with January, March, and December having more than 4% reduction in the 3 years. Thus, the meteorological change in North China had helped alleviate PM2.5 to certain extent and should not be held responsible for the regional air pollution problem. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	air pollution; hypothesis testing; meteorological change; North China
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185813
作者单位	Yuanpei College, Peking University, Beijing, China; Department of Statistics, University of Michigan, Ann Arbor, MI, United States; Guanghua School of Management and Center for Statistical Science, Peking University, Beijing, China; Department of Geological and Atmospheric Sciences, Iowa State University, Ames, IA, United States
推荐引用方式 GB/T 7714	Xu Z.,Chen S.X.,Wu X.. Meteorological Change and Impacts on Air Pollution: Results From North China[J],2020,125(16).
APA	Xu Z.,Chen S.X.,&Wu X..(2020).Meteorological Change and Impacts on Air Pollution: Results From North China.Journal of Geophysical Research: Atmospheres,125(16).
MLA	Xu Z.,et al."Meteorological Change and Impacts on Air Pollution: Results From North China".Journal of Geophysical Research: Atmospheres 125.16(2020).