DOI: 10.1016/j.atmosenv.2018.01.030
Scopus记录号: 2-s2.0-85041483890
论文题名: Trends of atmospheric black carbon concentration over United Kingdom
作者: Singh V ; , Ravindra K ; , Sahu L ; , Sokhi R
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2018
卷: 178 起始页码: 148
结束页码: 157
语种: 英语
英文关键词: Atmospheric black carbon (BC)
; BC trends
; Climate change
; Diurnal pattern
; Emissions
; Temporal variations
Scopus关键词: Climate change
; Climate models
; Location
; Particulate emissions
; Urban growth
; BC trends
; Black carbon
; Continuous observation
; Diurnal pattern
; Maximum concentrations
; Seasonal patterns
; Temporal variation
; Urban background
; Atmospheric movements
; black carbon
; black carbon
; carbon emission
; climate change
; concentration (composition)
; diurnal variation
; road
; rural area
; suburban area
; temporal variation
; traffic emission
; trend analysis
; urban area
; urban pollution
; aerosol
; Article
; atmosphere
; climate change
; falling
; management
; maximum concentration
; minimum concentration
; priority journal
; radiative forcing
; seasonal variation
; spring
; suburban area
; summer
; United Kingdom
; urban area
; winter
; City of Westminster
; England
; Europe
; London [England]
; Marylebone
; United Kingdom
; United Kingdom
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: The continuous observations over a period of 7 years (2009–2016) available at 7 locations show declining trend of atmospheric BC in the UK. Among all the locations, the highest decrease of 8 ± 3 percent per year was observed at the Marylebone road in London. The detailed analysis performed at 21 locations during 2009–2011 shows that average annual mean atmospheric BC concentration were 0.45, 1.47 ± 0.58, 1.34 ± 0.31, 1.83 ± 0.46 and 9.72 μgm−3 at rural, suburban, urban background, urban centre and kerbside sites respectively. Around 1 μgm−3 of atmospheric BC could be attributed to urban emission, whereas traffic contributed up to 8 μg m−3 of atmospheric BC near busy roads. Seasonal pattern was also observed at all locations except rural and kerbside location, with maximum concentrations (1.2–4 μgm−3) in winter. Further, minimum concentrations (0.3–1.2 μgm−3) were observed in summer and similar concentrations in spring and fall. At suburban and urban background locations, similar diurnal pattern were observed with atmospheric BC concentration peaks (≈1.8 μg m−3) in the morning (around 9 a.m.) and evening (7–9 p.m.) rush hours, whereas minimum concentrations were during late night hours (peak at 5 a.m.) and the afternoon hours (peak at 2 p.m.). The urban centre values show a similar morning pattern (peak at 9 a.m.; concentration - 2.5 μgm−3) in relation to background locations but only a slight decrease in concentration in the afternoon which remained above 2 μgm−3 till midnight. It is concluded that the higher flow of traffic at urban centre locations results in higher atmospheric BC concentrations throughout the day. Comparison of weekday and weekend daily averaged atmospheric BC showed maximum concentrations on Friday having minimum levels on Sunday. This study will help to refine the atmospheric BC emission over Europe and also provide inputs for climate change models, which in turn will help policy makers to reduce atmospheric BC emissions, globally. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82950
Appears in Collections: 气候变化事实与影响
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作者单位: National Atmospheric Research Laboratory, Tirupati, India; School of Public Health, Post Graduate Institute of Medical Education and Research (PGIMER), Chandigarh, India; Physical Research Laboratory, Ahmedabad, India; Centre for Atmospheric and Instrumentation Research (CAIR), University of Hertfordshire, Hatfield, Hertfordshire, United Kingdom
Recommended Citation:
Singh V,, Ravindra K,, Sahu L,et al. Trends of atmospheric black carbon concentration over United Kingdom[J]. Atmospheric Environment,2018-01-01,178