DOI: 10.1016/j.atmosenv.2017.08.044
Scopus记录号: 2-s2.0-85028351075
论文题名: AEROCAN, the Canadian sub-network of AERONET: Aerosol monitoring and air quality applications
作者: Sioris C ; E ; , Abboud I ; , Fioletov V ; E ; , McLinden C ; A
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 167 起始页码: 444
结束页码: 457
语种: 英语
英文关键词: Aerosols
; Canada
; Remote sensing
Scopus关键词: Aerosols
; Air quality
; Atmospheric aerosols
; Boundary layers
; Deforestation
; Pollution
; Remote sensing
; Aerosol optical depths
; Aerosol robotic networks
; Ambient particulate Matter
; Anthropogenic contribution
; Canada
; Data analysis techniques
; Ground-based remote sensing
; Tropospheric aerosols
; Air pollution
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: Previous studies have demonstrated the utility of AERONET (Aerosol Robotic Network) aerosol optical depth (AOD) data for monitoring the spatial variability of particulate matter (PM) in relatively polluted regions of the globe. AEROCAN, a Canadian sub-network of AERONET, was established 20 years ago and currently consists of twenty sites across the country. In this study, we examine whether the AEROCAN sunphotometer data provide evidence of anthropogenic contributions to ambient particulate matter concentrations in relatively clean Canadian locations. The similar weekly cycle of AOD and PM2.5 over Toronto provides insight into the impact of local pollution on observed AODs. High temporal correlations (up to r = 0.78) between daily mean AOD (or its fine-mode component) and PM2.5 are found at southern Ontario AEROCAN sites during May–August, implying that the variability in the aerosol load resides primarily in the boundary layer and that sunphotometers capture day-to-day PM2.5 variations at moderately polluted sites. The sensitivity of AEROCAN AOD data to anthropogenic surface-level aerosol enhancements is demonstrated using boundary-layer wind information for sites near sources of aerosol or its precursors. An advantage of AEROCAN relative to the Canadian in-situ National Air Pollution Surveillance (NAPS) network is the ability to detect free tropospheric aerosol enhancements, which can be large in the case of lofted forest fire smoke or desert dust. These aerosol plumes eventually descend to the surface, sometimes in populated areas, exacerbating air quality. In cases of large AOD (≥0.4), AEROCAN data are also useful in characterizing the aerosol type. The AEROCAN network includes three sites in the high Arctic, a region not sampled by the NAPS PM2.5 monitoring network. These polar sites show the importance of long-range transport and meteorology in the Arctic haze phenomenon. Also, AEROCAN sunphotometers are, by design and due to regular maintenance, the most valuable monitors available for long term aerosol trends. Using a variety of data analysis techniques and timescales, the usefulness of this ground-based remote-sensing sub-network for providing information relevant to air quality is demonstrated. © 2017 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82657
Appears in Collections: 气候变化事实与影响
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作者单位: Air Quality Research Division, Environment and Climate Change Canada (ECCC), Toronto, ON, Canada
Recommended Citation:
Sioris C,E,, Abboud I,et al. AEROCAN, the Canadian sub-network of AERONET: Aerosol monitoring and air quality applications[J]. Atmospheric Environment,2017-01-01,167