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نوع الوثيقة : مقال في مجلة دورية 
عنوان الوثيقة :
توزيع حبيبات الغبار فوق مدينة برشلونة بأسبانيا
Urban aerosol size distributions over the Mediterranean city of Barcelona, NE Spain
 
الموضوع : علوم البيئة 
لغة الوثيقة : الانجليزية 
المستخلص : Differential mobility particle sizer (DMPS) aerosol concentrations (N(13-800)) were collected over a one-year-period (2004) at an urban background site in Barcelona, North-Eastern Spain. Quantitative contributions to particle number concentrations of the nucleation (33-39%), Aitken (39-49%) and accumulation mode (18-22%) were estimated. We examined the source and time variability of atmospheric aerosol particles by using both K-means clustering and Positive Matrix Factorization (PMF) analysis. Performing clustering analysis on hourly size distributions, nine K-means DMPS clusters were identified and, by directional association, diurnal variation and relationship to meteorological and pollution variables, four typical aerosol size distribution scenarios were identified: traffic (69% of the time), dilution (15% of the time), summer background conditions (4% of the time) and regional pollution (12% of the time). According to the results of PMF, vehicle exhausts are estimated to contribute at least to 62-66% of the total particle number concentration, with a slightly higher proportion distributed towards the nucleation mode (34 %) relative to the Aitken mode (28-32%). Photochemically induced nucleation particles make only a small contribution to the total particle number concentration (2-3% of the total), although only particles larger than 13 nm were considered in this study. Overall the combination of the two statistical methods is successful at separating components and quantifying relative contributions to the particle number population. 
ردمد : 1680-7316 
اسم الدورية : ATMOSPHERIC CHEMISTRY AND PHYSICS 
المجلد : 12 
العدد : 22 
سنة النشر : 1433 هـ
2012 م 
نوع المقالة : مقالة علمية 
تاريخ الاضافة على الموقع : Sunday, June 2, 2013 

الباحثون

اسم الباحث (عربي)اسم الباحث (انجليزي)نوع الباحثالمرتبة العلميةالبريد الالكتروني
M. Dall'OstoDall'Osto, M. باحث  
D. C. S BeddowsBeddows, D. C. S باحث  
J. PeyPey, J. باحث  
S. RodriguezRodriguez, S. باحث  
A AlastueyAlastuey, A باحث  
Roy M HarrisonHarrison, Roy M باحث manuel.dallosto@gmail.com
X QuerolQuerol, X باحث  

الملفات

اسم الملفالنوعالوصف
 35588.pdf pdfUrban aerosol size distributions over the Mediterranean city of Barcelona, NE Spain

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