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DOI | 10.1016/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 |
ISSN | 0048-9697 |
EISSN | 1879-1026 |
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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