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Trends of atmospheric black carbon concentration over United Kingdom

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Trends of atmospheric black carbon concentration over United Kingdom. / Sokhi, Ranjeet; Singh, Vikas; Khaiwal, Ravindra; Sahu, Lokesh .

In: Atmospheric Environment, Vol. 178, 01.04.2018, p. 148–157.

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Sokhi, Ranjeet ; Singh, Vikas ; Khaiwal, Ravindra ; Sahu, Lokesh . / Trends of atmospheric black carbon concentration over United Kingdom. In: Atmospheric Environment. 2018 ; Vol. 178. pp. 148–157.

Bibtex

@article{94c96bb3819d451caa56edd2ed0a50a2,
title = "Trends of atmospheric black carbon concentration over United Kingdom",
abstract = "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 μgm−3 of atmospheric BC near busy roads. Seasonal pattern was also observed at all locations except ruraland 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 andurban background locations, similar diurnal pattern were observed with atmospheric BC concentration peaks (≈1.8 μgm−3) in the morning (around 9 a.m.) and evening (7–9 p.m.) rush hours, whereas minimum concentrationswere 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 backgroundlocations 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 BCconcentrations 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 theatmospheric 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.",
keywords = "BLACK CARBON, air quality, TRENDS, UK",
author = "Ranjeet Sokhi and Vikas Singh and Ravindra Khaiwal and Lokesh Sahu",
note = "{\textcopyright} 2018 Elsevier Ltd. All rights reserved. ",
year = "2018",
month = apr,
day = "1",
doi = "10.1016/j.atmosenv.2018.01.030",
language = "English",
volume = "178",
pages = "148–157",
journal = "Atmospheric Environment",
issn = "1352-2310",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Trends of atmospheric black carbon concentration over United Kingdom

AU - Sokhi, Ranjeet

AU - Singh, Vikas

AU - Khaiwal, Ravindra

AU - Sahu, Lokesh

N1 - © 2018 Elsevier Ltd. All rights reserved.

PY - 2018/4/1

Y1 - 2018/4/1

N2 - 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 μgm−3 of atmospheric BC near busy roads. Seasonal pattern was also observed at all locations except ruraland 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 andurban background locations, similar diurnal pattern were observed with atmospheric BC concentration peaks (≈1.8 μgm−3) in the morning (around 9 a.m.) and evening (7–9 p.m.) rush hours, whereas minimum concentrationswere 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 backgroundlocations 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 BCconcentrations 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 theatmospheric 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.

AB - 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 μgm−3 of atmospheric BC near busy roads. Seasonal pattern was also observed at all locations except ruraland 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 andurban background locations, similar diurnal pattern were observed with atmospheric BC concentration peaks (≈1.8 μgm−3) in the morning (around 9 a.m.) and evening (7–9 p.m.) rush hours, whereas minimum concentrationswere 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 backgroundlocations 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 BCconcentrations 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 theatmospheric 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.

KW - BLACK CARBON

KW - air quality

KW - TRENDS

KW - UK

UR - http://www.scopus.com/inward/record.url?scp=85041483890&partnerID=8YFLogxK

U2 - 10.1016/j.atmosenv.2018.01.030

DO - 10.1016/j.atmosenv.2018.01.030

M3 - Article

VL - 178

SP - 148

EP - 157

JO - Atmospheric Environment

JF - Atmospheric Environment

SN - 1352-2310

ER -