气候变化领域集成服务门户(CCPortal): Modulation of daily PM2.5 concentrations over China in winter bylarge-scale circulation and climate change

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DOI	10.5194/acp-23-2829-2023
	Modulation of daily PM2.5 concentrations over China in winter bylarge-scale circulation and climate change
	Jia, Zixuan; Ordonez, Carlos; Doherty, Ruth M.; Wild, Oliver; Turnock, Steven T.; O'Connor, Fiona M.
发表日期	2023
ISSN	1680-7316
EISSN	1680-7324
起始页码	2829
结束页码	2842
卷号	23 期号:4 页码:14
英文摘要	We use the United Kingdom Earth System Model, UKESM1, to investigate the influence of the winter large-scale circulation on daily concentrations of PM2.5 (particulate matter with an aerodynamic diameter of 2.5 mu m or less) and their sensitivity to emissions over major populated regions of China over the period 1999-2019. We focus on the Yangtze River delta (YRD), where weak flow of cold, dry air from the north and weak inflow of maritime air are particularly conducive to air pollution. These provide favourable conditions for the accumulation of local pollution but limit the transport of air pollutants into the region from the north. Based on the dominant large-scale circulation, we construct a new index using the north-south pressure gradient and apply it to characterise PM2.5 concentrations over the region. We show that this index can effectively distinguish different levels of pollution over YRD and explain changes in PM2.5 sensitivity to emissions from local and surrounding regions. We then project future changes in PM2.5 concentrations using this index and find an increase in PM2.5 concentrations over the region due to climate change that is likely to partially offset the effect of emission control measures in the near-term future. To benefit from future emission reductions, more stringent emission controls are required to offset the effects of climate change.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000942237700001
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/273838
作者单位	University of Edinburgh; Complutense University of Madrid; Lancaster University; Met Office - UK; Hadley Centre; University of Leeds
推荐引用方式 GB/T 7714	Jia, Zixuan,Ordonez, Carlos,Doherty, Ruth M.,et al. Modulation of daily PM2.5 concentrations over China in winter bylarge-scale circulation and climate change[J],2023,23(4):14.
APA	Jia, Zixuan,Ordonez, Carlos,Doherty, Ruth M.,Wild, Oliver,Turnock, Steven T.,&O'Connor, Fiona M..(2023).Modulation of daily PM2.5 concentrations over China in winter bylarge-scale circulation and climate change.ATMOSPHERIC CHEMISTRY AND PHYSICS,23(4),14.
MLA	Jia, Zixuan,et al."Modulation of daily PM2.5 concentrations over China in winter bylarge-scale circulation and climate change".ATMOSPHERIC CHEMISTRY AND PHYSICS 23.4(2023):14.