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DOI10.1016/j.scitotenv.2021.145215
Simultaneous measurements of PM1 and PM10 aerosol scattering properties and their relationships in urban Beijing: A two-year observation
Hu, Xinyao; Sun, Junying; Xia, Can; Shen, Xiaojing; Zhang, Yangmei; Zhang, Xiaoye; Zhang, Sinan
通讯作者Sun, JY (通讯作者),Chinese Acad Meteorol Sci, State Key Lab Severe Weather, Beijing 100081, Peoples R China. ; Sun, JY (通讯作者),Chinese Acad Meteorol Sci, Key Lab Atmospher Chem CMA, Beijing 100081, Peoples R China.
发表日期2021
ISSN0048-9697
EISSN1879-1026
卷号770
英文摘要The aerosol scattering properties of submicron (PM1) and sub-10 mu m particles (PM10) under dry conditions (RH < 30%) were investigated in Beijing from 2018 to 2019. Using the simultaneous measurement of PM1 and PM10, the scattering properties of super micron (PM10-1) particles were also calculated. At 550 nm, the average of scattering coefficient (sigma(sp)) and asymmetry parameter (g) were 208.7 +/- 204.9 Mm(-1) and 0.61 +/- 0.04 for PM10, 140.6 +/- 130.2 Mm(-1) and 0.60 +/- 0.04 for PM1, and 69.8 +/- 82.2 Mm(-1) and 0.62 +/- 0.04 for PM10-1, respectively, while the backscattering ratio (b) values were 0.13 +/- 0.02 for PM10 and PM1, and 0.12 +/- 0.02 for PM10-1. The mass scattering efficiencies (MSE) for PM10, PM1 and PM10-1 were 2.43 +/- 2.37, 3.67 +/- 0.96, and 1.73 +/- 1.82 m(2) g(-1), respectively. In 2019, sigma(sp) decreased by approximately 18.4% for PM10, and 16.7% for PM1 compared with those in 2018, which was quite similar to the decrease of 17% and 19% for PM10 and PM2.5 mass concentrations during the same time period. The scattering Angstrom exponent (SAE(450/700)), which was 1.88 +/- 0.29 for PM1 and 1.50 +/- 0.27 for PM10 indicated size distributions dominated by fine mode aerosols. This is also evidenced by the high submicron scattering ratio (Rsp) (71.1% +/- 7.9%). The high SAE, Rsp, and high PM1 sigma(sp) in the study suggest that control of fine particle pollution is important to reduce overall PM pollution in urban Beijing. In addition, with an increase in sigma(sp), b, Rsp, and SAE gradually decreased, while g and MSE increased. The clearly scattering coefficient-dependent MSE suggests that high aerosol loading and high MSE both play an important role in degraded visibility during heavy pollution periods. (C) 2021 Elsevier B.V. All rights reserved.
关键词YANGTZE-RIVER DELTANORTH CHINA PLAINOPTICAL-PROPERTIESATMOSPHERIC AEROSOLSURFACE AEROSOLLONG-TERMAIR-POLLUTIONRADIATIVE PROPERTIESREGIONAL AEROSOLLIGHT-SCATTERING
英文关键词Scattering coefficient; Submicron scattering ratio; Aerosol mass scattering efficiency; Backscattering ratio; Fine particle pollution
语种英语
WOS研究方向Environmental Sciences & Ecology
WOS类目Environmental Sciences
WOS记录号WOS:000627896100068
来源期刊SCIENCE OF THE TOTAL ENVIRONMENT
来源机构中国科学院西北生态环境资源研究院
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/254574
作者单位[Hu, Xinyao; Sun, Junying; Xia, Can; Shen, Xiaojing; Zhang, Yangmei; Zhang, Xiaoye; Zhang, Sinan] Chinese Acad Meteorol Sci, State Key Lab Severe Weather, Beijing 100081, Peoples R China; [Hu, Xinyao; Sun, Junying; Xia, Can; Shen, Xiaojing; Zhang, Yangmei; Zhang, Xiaoye; Zhang, Sinan] Chinese Acad Meteorol Sci, Key Lab Atmospher Chem CMA, Beijing 100081, Peoples R China; [Sun, Junying] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Peoples R China; [Xia, Can] Nanjing Univ Informat Sci & Technol, Nanjing 210000, Peoples R China
推荐引用方式
GB/T 7714
Hu, Xinyao,Sun, Junying,Xia, Can,et al. Simultaneous measurements of PM1 and PM10 aerosol scattering properties and their relationships in urban Beijing: A two-year observation[J]. 中国科学院西北生态环境资源研究院,2021,770.
APA Hu, Xinyao.,Sun, Junying.,Xia, Can.,Shen, Xiaojing.,Zhang, Yangmei.,...&Zhang, Sinan.(2021).Simultaneous measurements of PM1 and PM10 aerosol scattering properties and their relationships in urban Beijing: A two-year observation.SCIENCE OF THE TOTAL ENVIRONMENT,770.
MLA Hu, Xinyao,et al."Simultaneous measurements of PM1 and PM10 aerosol scattering properties and their relationships in urban Beijing: A two-year observation".SCIENCE OF THE TOTAL ENVIRONMENT 770(2021).
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