气候变化领域集成服务门户(CCPortal): Dominance of large-scale atmospheric circulations in long-term variations of winter PM10 concentrations over East Asia

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DOI	10.1016/j.atmosres.2020.104871
	Dominance of large-scale atmospheric circulations in long-term variations of winter PM10 concentrations over East Asia
	Lee G.; Ho C.-H.; Chang L.-S.; Kim J.; Kim M.-K.; Kim S.-J.
发表日期	2020
ISSN	0169-8095
卷号	238
英文摘要	Concentrations of wintertime particulate matters of diameters below 10 μm (PM10) in South Korea and China have decreased since the 2000s largely owing to the emissions reduction policies of the two countries; however, this decreasing tendency has been notably weakened, or even been reversed, in recent years. This study examines the influence of large-scale atmospheric circulations on this PM10 change over East Asia for the winters (December–February) of the 2004/05–2015/16 period using an empirical orthogonal function (EOF) analysis. The first EOF mode, which accounts for 32.7% of the total variance, indicates decreases in PM10 concentrations until 2012 and thereafter increases in them particularly at most stations in eastern and northeastern China. Regression patterns of meteorological variables with respect to the first EOF time series indicate that the wintertime PM10 variations over East Asia are greatly influenced by the Ural blocking; the weakening of the Ural blocking after 2014 led to the weakening of cold air flows from the north and provided atmospheric conditions favorable for bad air quality events over East Asia. The second EOF mode, which accounts for 20.1% of the total variance, shows a similar spatial distribution as the linear trend of PM10 concentrations during the analysis period and would be related to the long-term changes in emissions. Our findings emphasize that the long-term variations in air quality over East Asia are affected primarily by the variations in large-scale atmospheric circulations with secondary contributions from the changes in emissions. © 2020 Elsevier B.V.
英文关键词	Atmospheric circulation; East Asia; Particulate matter; PM10; Ural blocking
学科领域	Air quality; Climatology; Emission control; Orthogonal functions; Atmospheric circulation; East Asia; Particulate Matter; PM10; Ural blocking; Particles (particulate matter); air quality; atmospheric blocking; atmospheric circulation; concentration (composition); empirical orthogonal function analysis; particulate matter; spatial distribution; winter; Far East
语种	英语
scopus关键词	Air quality; Climatology; Emission control; Orthogonal functions; Atmospheric circulation; East Asia; Particulate Matter; PM10; Ural blocking; Particles (particulate matter); air quality; atmospheric blocking; atmospheric circulation; concentration (composition); empirical orthogonal function analysis; particulate matter; spatial distribution; winter; Far East
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/120433
作者单位	School of Earth and Environmental Sciences, Seoul National University, 1, Gwanak-ro, Gwanak-gu, Seoul, South Korea; Air Quality Forecasting Center, National Institute of Environmental Research, 42, Hwangyeong-ro, Seogu, Incheon, South Korea; Climate Research Division, National Institute of Meteorological Sciences, 33, Seohobuk-ro, Seogwipo-si, Jeju-do, South Korea; Department of Atmospheric Science, Kongju National University, 56, Gongjudaehak-ro, Gongju-si, Chungcheongnam-do, South Korea; Division of Polar Climate Sciences, Korea Polar Research Institute, 26, Songdomirae-ro, Yeonsu-gu, Incheon, South Korea
推荐引用方式 GB/T 7714	Lee G.,Ho C.-H.,Chang L.-S.,et al. Dominance of large-scale atmospheric circulations in long-term variations of winter PM10 concentrations over East Asia[J],2020,238.
APA	Lee G.,Ho C.-H.,Chang L.-S.,Kim J.,Kim M.-K.,&Kim S.-J..(2020).Dominance of large-scale atmospheric circulations in long-term variations of winter PM10 concentrations over East Asia.Atmospheric Research,238.
MLA	Lee G.,et al."Dominance of large-scale atmospheric circulations in long-term variations of winter PM10 concentrations over East Asia".Atmospheric Research 238(2020).