DOI: 10.1016/j.atmosenv.2017.07.054
Scopus记录号: 2-s2.0-85026875487
论文题名: An intercomparison of AOD-converted PM2.5 concentrations using different approaches for estimating aerosol vertical distribution
作者: Su T ; , Li J ; , Li C ; , Lau A ; K ; -H ; , Yang D ; , Shen C
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 166 起始页码: 531
结束页码: 542
语种: 英语
英文关键词: Aerosol vertical distribution
; AOD
; Boundary layer height
; PM2.5
Scopus关键词: Atmospheric aerosols
; Boundary layer flow
; Boundary layers
; Climatology
; Light extinction
; Optical radar
; Radiosondes
; Aerosol extinction
; Aerosol extinction coefficient
; Aerosol optical depths
; Boundary layer heights
; Correlation coefficient
; PM2.5
; PM2.5 concentration
; Vertical distributions
; Aerosols
; aerosol
; aerosol property
; boundary layer
; climatology
; concentration (composition)
; correlation
; data acquisition
; height
; lidar
; monitoring
; optical depth
; particulate matter
; radiosonde
; satellite data
; seasonal variation
; uncertainty analysis
; aerosol optical depth
; air pollution indicator
; Article
; atmospheric dispersion
; boundary layer
; climate
; environmental monitoring
; particulate matter
; priority journal
; telecommunication
; China
; Hong Kong
; New Territories
; Yuen Long San Hui
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Due to the limited spatial coverage of surface PM2.5 monitoring sites, satellite AOD (aerosol optical depth) products have been widely used to estimate surface PM2.5 in different parts of the world. A major difficulty as well as source of uncertainty in converting AOD to PM2.5 is the determination of aerosol vertical distribution, usually represented by the boundary layer height (BLH). In this study, we evaluate the performance of different approaches of estimating aerosol vertical distributions in the AOD-PM2.5 conversion process, using long-term and multi-source data acquired at a super station, Yuen Long, Hong Kong. The monthly climatology of aerosol vertical distribution and BLH products derived from lidar, radiosonde, and MERRA reanalysis data are respectively applied for converting AOD to surface aerosol extinction coefficients. Seasonal empirical hygroscopic growth functions are constructed to convert aerosol extinction to dry PM2.5 mass concentration. Results indicate that different vertical distribution estimation approaches can have highly varying effect on the converted PM2.5 concentration. Using lidar-derived BLHs shows the best agreement, with a correlation coefficient of 0.73 and a relative bias of 30.6% between retrievals and observations. Since continuous lidar measurements are not available for most regions, the climatology pattern of aerosol structure and radiosonde-derived BLHs are found to be suitable alternatives with a correlation coefficient of ∼0.6, and considerably outperform the results using BLHs derived from reanalysis data. Elevated aerosol layers appear to be the major source of uncertainty and result in an overestimate of satellite results, especially during the spring and summer seasons. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82665
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Department of Atmospheric and Oceanic Sciences and Earth System Science Interdisciplinary Center, University of Maryland, College Park, MD, United States; Department of Atmospheric and Oceanic Sciences, Peking University, Beijing, China; Department of Civil and Environmental Engineering and Institute for the Environment, Hong Kong University of Science and Technology, Kowloon, Hong Kong
Recommended Citation:
Su T,, Li J,, Li C,et al. An intercomparison of AOD-converted PM2.5 concentrations using different approaches for estimating aerosol vertical distribution[J]. Atmospheric Environment,2017-01-01,166