Document Details

Document Type : Article In Journal 
Document Title :
Size distribution, mixing state and source apportionment of black carbon aerosol in London during wintertime
التوزيع الحجمى وتحديد المصادر لهبو الكربون الأسود فى لندن أثناء فصل الشتاء
 
Subject : Enviromental sciences 
Document Language : English 
Abstract : Black carbon aerosols (BC) at a London urban site were characterised in both winter- and summertime 2012 during the Clean Air for London (ClearfLo) project. Pos-itive matrix factorisation (PMF) factors of organic aerosol mass spectra measured by a high-resolution aerosol mass spectrometer (HR-AMS) showed traffic-dominant sources in summer but in winter the influence of additional non-traffic sources became more important, mainly from solid fuel sources (SF). Measurements using a single particle soot pho-tometer (SP2, DMT), showed the traffic-dominant BC exhib-ited an almost uniform BC core size (Dc) distribution with very thin coating thickness throughout the detectable range of Dc. However, the size distribution of Dc (project average mass median Dc = 149 ± 22 nm in winter, and 120 ± 6 nm in summer) and BC coating thickness varied significantly in winter. A novel methodology was developed to attribute the BC number concentrations and mass abundances from traffic (BCtr) and from SF (BCsf), by using a 2-D histogram of the particle optical properties as a function of BC core size, as measured by the SP2. The BCtr and BCsf showed distinctly different Dc distributions and coating thicknesses, with BCsf displaying larger Dc and larger coating thickness compared to BCtr. BC particles from different sources were also appor-tioned by applying a multiple linear regression between the total BC mass and each AMS-PMF factor (BC–AMS–PMF method), and also attributed by applying the absorption spec-tral dependence of carbonaceous aerosols to 7-wavelength Aethalometer measurements (Aethalometer method). 
ISSN : 1680-7316 
Journal Name : Atmospheric Chemistry And Physics 
Volume : 14 
Issue Number : 18 
Publishing Year : 1435 AH
2014 AD 
Article Type : Article 
Added Date : Sunday, October 19, 2014 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
D. LiuLiu, D. Researcher  
J. D. AllanAllan, J. D. Researcher  
D. E. YoungYoung, D. E. Researcher  
H. CoeCoe, H. Researcher  
D. BeddowsBeddows, D. Researcher  
.Z. L. FlemingFleming, .Z. L. Researcher  
M. J. FlynnFlynn, M. J. Researcher  
M. W. GallagherGallagher, M. W. Researcher  
R. M. HarrisonHarrison, R. M. Researcher  
J. LeeLee, J. Researcher  
A. S. H. PrevotPrevot, A. S. H. Researcher  
J. W. TaylorTaylor, J. W. Researcher  
J. YinYin, J. Researcher  
P. I. WilliamsWilliams, P. I. Researcher  
P. ZotterZotter, P. Researcher  

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