DOI: 10.1002/2015JD024655
论文题名: The observation-based relationships between PM2.5 and AOD over China
作者: Xin J. ; Gong C. ; Liu Z. ; Cong Z. ; Gao W. ; Song T. ; Pan Y. ; Sun Y. ; Ji D. ; Wang L. ; Tang G. ; Wang Y.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2016
卷: 121, 期: 18 起始页码: 10701
结束页码: 10716
语种: 英语
英文关键词: air pollution
; AOD
; China
; PM2.5
Scopus关键词: aerosol composition
; atmospheric pollution
; concentration (composition)
; extinction coefficient
; humidity
; optical depth
; particulate matter
; precipitable water
; water vapor
; China
; Qinghai-Xizang Plateau
英文摘要: This is the first investigation of the generalized linear regressions of PM2.5 and aerosol optical depth (AOD) with the Campaign on atmospheric Aerosol Research-China network over the large high-concentration aerosol region during the period from 2012 to 2013. The map of the PM2.5 and AOD levels showed large spatial differences in the aerosol concentrations and aerosol optical properties over China. The ranges of the annual mean PM2.5 and AOD were 10–117 µg/m3 and 0.12–1.11 from the clean regions to seriously polluted regions, from the almost “arctic” and the Tibetan Plateau to tropical environments. There were significant spatial agreements and correlations between the PM2.5 and AOD. However, the linear regression functions (PM2.5 = A*AOD + B) exhibited large differences in different regions and seasons. The slopes (A) were from 13 to 90, the intercepts (B) were from 0.8 to 33.3, and the correlation coefficients (R2) ranged from 0.06 to 0.75. The slopes (A) were much higher in the north (41–99) than in the south (13–64) because the extinction efficiency of hygroscopic aerosol was rapidly increasing with the increasing humidity from the dry north to the humid south. Meanwhile, the intercepts (B) were generally lower, and the correlation coefficients (R2) were much higher in the dry north than in the humid south. There was high consistency of AOD versus PM2.5 for all sites in three ranges of the atmospheric column precipitable water vapor (PWV). The segmented linear regression functions were y = 84.66x + 9.85 (PWV < 1.0), y = 69.47x + 11.87 (1.0 < PWV < 2.5), and y = 52.37x + 8.59 (PWV > 2.5). The correlation coefficients (R2) were high from 0.64 to 0.70 across China. ©2016. American Geophysical Union. All Rights Reserved.
资助项目: 41222033
; 41375036
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62831
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, Chengdu University of Information Technology, Chengdu, China; Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China
Recommended Citation:
Xin J.,Gong C.,Liu Z.,et al. The observation-based relationships between PM2.5 and AOD over China[J]. Journal of Geophysical Research: Atmospheres,2016-01-01,121(18)