气候变化领域集成服务门户(CCPortal): China's emission control strategies have suppressed unfavorable influences of climate on wintertime PM2.5 concentrations in Beijing since 2002

CCPortal

DOI	10.5194/acp-20-1497-2020
	China's emission control strategies have suppressed unfavorable influences of climate on wintertime PM2.5 concentrations in Beijing since 2002
	Gao M.; Liu Z.; Zheng B.; Ji D.; Sherman P.; Song S.; Xin J.; Liu C.; Wang Y.; Zhang Q.; Xing J.; Jiang J.; Wang Z.; Carmichael G.R.; McElroy M.B.
发表日期	2020
ISSN	16807316
起始页码	1497
结束页码	1505
卷号	20 期号:3
英文摘要	Severe wintertime PM2.5 pollution in Beijing has been receiving increasing worldwide attention, yet the decadal variations remain relatively unexplored. Combining field measurements and model simulations, we quantified the relative influences of anthropogenic emissions and meteorological conditions on PM2.5 concentrations in Beijing over the winters of 2002-2016. Between the winters of 2011 and 2016, stringent emission control measures resulted in a 21% decrease in mean mass concentrations of PM2.5 in Beijing, with 7 fewer haze days per winter on average. Given the overestimation of PM2.5 by the model, the effectiveness of stringent emission control measures might have been slightly overstated. With fixed emissions, meteorological conditions over the study period would have led to an increase in haze in Beijing, but the strict emission control measures have suppressed the unfavorable influences of the recent climate. The unfavorable meteorological conditions are attributed to the weakening of the East Asia winter monsoon associated particularly with an increase in pressure associated with the Aleutian Low. © 2020 Copernicus GmbH. All rights reserved.
关键词	anthropogenic source climate effect concentration (composition)decadal variation emission control monsoon particulate matter policy strategy winter Beijing [China]China
语种	英语
来源机构	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132248
推荐引用方式 GB/T 7714	Gao M.,Liu Z.,Zheng B.,et al. China's emission control strategies have suppressed unfavorable influences of climate on wintertime PM2.5 concentrations in Beijing since 2002[J]. Atmospheric Chemistry and Physics,2020,20(3).
APA	Gao M..,Liu Z..,Zheng B..,Ji D..,Sherman P..,...&McElroy M.B..(2020).China's emission control strategies have suppressed unfavorable influences of climate on wintertime PM2.5 concentrations in Beijing since 2002.,20(3).
MLA	Gao M.,et al."China's emission control strategies have suppressed unfavorable influences of climate on wintertime PM2.5 concentrations in Beijing since 2002".20.3(2020).