Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.atmosres.2020.104871 |
Dominance of large-scale atmospheric circulations in long-term variations of winter PM(10 )concentrations over East Asia | |
Lee, Greem1; Ho, Chang-Hoi1; Chang, Lim-Seok2; Kim, Jinwon3; Kim, Maeng-Ki4; Kim, Seong-Joong5 | |
2020-07-01 | |
发表期刊 | ATMOSPHERIC RESEARCH |
ISSN | 0169-8095 |
EISSN | 1873-2895 |
出版年 | 2020 |
卷号 | 238 |
文章类型 | Article |
语种 | 英语 |
国家 | South Korea |
英文摘要 | Concentrations of wintertime particulate matters of diameters below 10 mu m (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. |
英文关键词 | Particulate matter PM10 Atmospheric circulation Ural blocking East Asia |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000525323500005 |
WOS关键词 | TRANSBOUNDARY AIR-POLLUTANTS ; SEOUL METROPOLITAN-AREA ; YANGTZE-RIVER DELTA ; PARTICULATE MATTER ; METEOROLOGICAL CONDITIONS ; SOURCE APPORTIONMENT ; PM10 CONCENTRATIONS ; FORMATION MECHANISM ; SHANDONG PROVINCE ; URAL MOUNTAINS |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/289272 |
专题 | 地球科学 |
作者单位 | 1.Seoul Natl Univ, Sch Earth & Environm Sci, 1 Gwanak Ro, Seoul, South Korea; 2.Natl Inst Environm Res, Air Qual Forecasting Ctr, 42 Hwangyeong Ro, Incheon, South Korea; 3.Natl Inst Meteorol Sci, Climate Res Div, 33 Seohobuk Ro, Seogwipo Si, Jeju Do, South Korea; 4.Kongiu Natl Univ, Dept Atmospher Sci, 56 Gongjudaehak Ro, Gongju Si, Chungcheongnam, South Korea; 5.Korea Polar Res Inst, Div Polar Climate Sci, 26 Songdomirae Ro, Incheon, South Korea |
推荐引用方式 GB/T 7714 | Lee, Greem,Ho, Chang-Hoi,Chang, Lim-Seok,et al. Dominance of large-scale atmospheric circulations in long-term variations of winter PM(10 )concentrations over East Asia[J]. ATMOSPHERIC RESEARCH,2020,238. |
APA | Lee, Greem,Ho, Chang-Hoi,Chang, Lim-Seok,Kim, Jinwon,Kim, Maeng-Ki,&Kim, Seong-Joong.(2020).Dominance of large-scale atmospheric circulations in long-term variations of winter PM(10 )concentrations over East Asia.ATMOSPHERIC RESEARCH,238. |
MLA | Lee, Greem,et al."Dominance of large-scale atmospheric circulations in long-term variations of winter PM(10 )concentrations over East Asia".ATMOSPHERIC RESEARCH 238(2020). |
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