气候变化领域集成服务门户(CCPortal): Future changes in Beijing haze events under different anthropogenic aerosol emission scenarios

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DOI	10.5194/acp-21-7499-2021
	Future changes in Beijing haze events under different anthropogenic aerosol emission scenarios
	Zhang L.; Wilcox L.J.; Dunstone N.J.; Paynter D.J.; Hu S.; Bollasina M.; Li D.; Shonk J.K.P.; Zou L.
发表日期	2021
ISSN	1680-7316
起始页码	7499
结束页码	7514
卷号	21 期号:10
英文摘要	Air pollution is a major issue in China and one of the largest threats to public health. We investigated future changes in atmospheric circulation patterns associated with haze events in the Beijing region and the severity of haze events during these circulation conditions from 2015 to 2049 under two different aerosol scenarios: a maximum technically feasible aerosol reduction (MTFR) and a current legislation aerosol scenario (CLE). In both cases greenhouse gas emissions follow the Representative Concentration Pathway 4.5 (RCP4.5). Under RCP4.5 with CLE aerosol the frequency of circulation patterns associated with haze events increases due to a weakening of the East Asian winter monsoon via increased sea level pressure over the North Pacific. The rapid reduction in anthropogenic aerosol and precursor emissions in MTFR further increases the frequency of circulation patterns associated with haze events, due to further increases in the sea level pressure over the North Pacific and a reduction in the intensity of the Siberian high. Even with the aggressive aerosol reductions in MTFR periods of poor visibility, represented by above-normal aerosol optical depth (AOD), still occur in conjunction with haze-favorable atmospheric circulation. However, the winter mean intensity of poor visibility decreases in MTFR, so that haze events are less dangerous in this scenario by 2050 compared to CLE and relative to the current baseline. This study reveals the competing effects of aerosol emission reductions on future haze events through their direct contribution to pollutant source and their influence on the atmospheric circulation. A compound consideration of these two impacts should be taken in future policy making. © 2021 Copernicus GmbH. All rights reserved.
语种	英语
scopus关键词	aerosol; anthropogenic source; atmospheric circulation; atmospheric pollution; carbon emission; emission control; haze; monsoon; optical depth; sea level pressure
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/246882
作者单位	LASG, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing, 210044, China; Department of Meteorology, National Centre for Atmospheric Science, University of Reading, Reading, United Kingdom; Met Office Hadley Centre, FitzRoy Road, Exeter, EX1 3PB, United Kingdom; NOAA/Geophysical Fluid Dynamics Laboratory, Princeton, NJ, United States; University of Chinese Academy of Sciences, Beijing, 100049, China; School of Geosciences, Grant Institute, University of Edinburgh, Edinburgh, United Kingdom; Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China; MetOffice@Reading, Department of Meteorology, University of Reading, Reading, United Kingdom
推荐引用方式 GB/T 7714	Zhang L.,Wilcox L.J.,Dunstone N.J.,et al. Future changes in Beijing haze events under different anthropogenic aerosol emission scenarios[J],2021,21(10).
APA	Zhang L..,Wilcox L.J..,Dunstone N.J..,Paynter D.J..,Hu S..,...&Zou L..(2021).Future changes in Beijing haze events under different anthropogenic aerosol emission scenarios.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(10).
MLA	Zhang L.,et al."Future changes in Beijing haze events under different anthropogenic aerosol emission scenarios".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.10(2021).