globalchange  > 影响、适应和脆弱性
DOI: 10.1016/j.atmosres.2018.08.022
Scopus ID: 2-s2.0-85053477646
Title:
Comparing the impact of strong and weak East Asian winter monsoon on PM2.5 concentration in Beijing
Author: Wang C.; An X.; Zhang P.; Sun Z.; Cui M.; Ma L.
Source Publication: Atmospheric Research
ISSN: 1698095
Publishing Year: 2019
Volume: 215
pages begin: 165
pages end: 177
Language: 英语
Keyword: Beijing ; East Asian winter monsoon (EAWM) ; PM2.5 ; Tracking source areas with adjoint model
Scopus Keyword: Atmospheric thermodynamics ; Boundary layer flow ; Boundary layers ; Climatology ; Atmospheric chemistry model ; Atmospheric circulation ; Beijing ; East Asian winter monsoon ; National centers for environmental predictions ; PM2.5 ; Sensitivity coefficient ; Source area ; Atmospheric chemistry ; aerosol ; atmospheric chemistry ; atmospheric circulation ; concentration (composition) ; monsoon ; particulate matter ; spatial distribution ; tracking ; winter ; Beijing [China] ; China ; Far East
English Abstract: We investigate the relationship between the wintertime PM2.5 concentration in Beijing from 2005 to 2016 and the East Asian winter monsoon (EAWM) strength based on PM2.5 observations and the National Centers for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR) reanalysis data. The large-scale atmospheric circulations are compared and the differences in spatial distribution and source areas of Beijing PM2.5 concentration are studied in depth combined with GRAPES-CUACE atmospheric chemistry model and its aerosol adjoint model in strong and weak EAWM years. The results show that the monthly Beijing PM2.5 concentration in winter is significantly anti-correlated with the individual EAWM indices of winter month. According to three EAWM indices, December 2014 and 2016 are selected as the representatives of strong and weak EAWM years for further comparison. In December 2014, the strong EAWM circulation was characterized by the strengthened subtropical westerly jet stream at 300 hPa, the deepened 500 hPa East Asian trough, the strengthened northwesterly wind at 850 hPa in North China, and the developed Siberian High. Conversely, these anomalous patterns in December 2016 were much weaker, resulting in lower boundary layer height, more stable atmosphere stratification and more frequent inversion. The simulated PM2.5 concentration in the northern and southern part of Beijing were affected by the EAWM to different extents, with the values of 55–75 μg/m3 in the north and 95–125 μg/m3 in the south. There was no obvious difference in the locations of sensitive source areas between December 2014 and 2016. However, compared to December 2014, the accumulated sensitivity coefficients of Beijing, Tianjin, Hebei and Shanxi sources at 72 h ahead of the objective time period were 2.2, 5.9, 1.6, and 1.4 times higher, and the key discharge period was 2.6 times longer in December 2016. The contributions of Beijing and Tianjin sources had greater increase rates, stressing the importance of sensitive source areas in the direction of southeast Beijing in weak EAWM year. © 2018 Elsevier B.V.
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Document Type: 期刊论文
Identifier: http://119.78.100.158/handle/2HF3EXSE/109058
Appears in Collections:影响、适应和脆弱性
气候变化事实与影响

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Affiliation: Institute of Atmospheric Composition, Chinese Academy of Meteorological Sciences, Beijing, 100081, China; State Key Laboratory of Severe Weather & Key Laboratory of Atmospheric Chemistry of CMA, Chinese Academy of Meteorological Sciences, Beijing, 100081, China; National Climate Center, China Meteorological Administration, Beijing, 100081, China; Institute of Urban Meteorology, China Meteorological Administration, Beijing, 100089, China; College of Atmospheric Sciences, Chengdu University of Information Technology, Chengdu, 610225, China; Liaoning Meteorological Equipment Support Centre, Shenyang, 110166, China; National Climate Center, China Meteorological Administration, ZhongGuanCun South Ave. 46, HaiDian District, Beijing, 100081, China

Recommended Citation:
Wang C.,An X.,Zhang P.,et al. Comparing the impact of strong and weak East Asian winter monsoon on PM2.5 concentration in Beijing[J]. Atmospheric Research,2019-01-01,215
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