تفاصيل الوثيقة

نوع الوثيقة : مقال في مجلة دورية 
عنوان الوثيقة :
التوزيع الحجمى وتحديد المصادر لهبو الكربون الأسود فى لندن أثناء فصل الشتاء
Size distribution, mixing state and source apportionment of black carbon aerosol in London during wintertime
 
الموضوع : علوم البيئة 
لغة الوثيقة : الانجليزية 
المستخلص : 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). 
ردمد : 1680-7316 
اسم الدورية : Atmospheric Chemistry And Physics 
المجلد : 14 
العدد : 18 
سنة النشر : 1435 هـ
2014 م 
نوع المقالة : مقالة علمية 
تاريخ الاضافة على الموقع : Sunday, October 19, 2014 

الباحثون

اسم الباحث (عربي)اسم الباحث (انجليزي)نوع الباحثالمرتبة العلميةالبريد الالكتروني
D. LiuLiu, D. باحث  
J. D. AllanAllan, J. D. باحث  
D. E. YoungYoung, D. E. باحث  
H. CoeCoe, H. باحث  
D. BeddowsBeddows, D. باحث  
.Z. L. FlemingFleming, .Z. L. باحث  
M. J. FlynnFlynn, M. J. باحث  
M. W. GallagherGallagher, M. W. باحث  
R. M. HarrisonHarrison, R. M. باحث  
J. LeeLee, J. باحث  
A. S. H. PrevotPrevot, A. S. H. باحث  
J. W. TaylorTaylor, J. W. باحث  
J. YinYin, J. باحث  
P. I. WilliamsWilliams, P. I. باحث  
P. ZotterZotter, P. باحث  

الملفات

اسم الملفالنوعالوصف
 37400.pdf pdfSize distribution, mixing state and source apportionment of black carbon aerosol in London during wintertime

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