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نوع الوثيقة : مقال في مجلة دورية 
عنوان الوثيقة :
مقارنة الطرق لتقدير دخان الأخشاب وتقدير تركيزه فى هواء المملكة المتحدة
Comparison of methods for evaluation of wood smoke and estimation of UK ambient concentrations
 
الموضوع : علوم البيئة 
لغة الوثيقة : الانجليزية 
المستخلص : Airborne concentrations of the wood smoke tracers, levoglucosan and fine potassium have been measured at urban and rural sites in the United Kingdom alongside measurements with a multi-wavelength aethalometer. The UK sites, and especially those in cities, show low ratios of levoglucosan to potassium in comparison to the majority of published data. It is concluded that there may be two distinct source types, one from wood stoves and fireplaces with a high organic carbon content, best represented by levoglucosan, the other from larger, modern appliances with a very high burn-out efficiency, best represented by potassium. Based upon levoglucosan concentrations and a conversion factor of 11.2 from levoglucosan to wood smoke mass, average concentrations of wood smoke including winter and summer sampling periods are 0.23 μgm−3 in Birmingham and 0.33 μgm−3 in London, well below concentrations typical of other northern European urban areas. There may be a further contribution from sources of potassium-rich emissions amounting to an estimated 0.08 μgm−3 in Birmingham and 0.30 μgm−3 in London. Concentrations were highly correlated between two London sites separated by 4 km suggesting that a regional source is responsible. Data from the aethalometer are either supportive of these conclusions or suggest higher concentrations, depending upon the way in which the data are analysed. 
ردمد : 1680-7316 
اسم الدورية : Atmospheric Chemistry And Physics 
المجلد : 12 
العدد : 17 
سنة النشر : 1433 هـ
2012 م 
نوع المقالة : مقالة علمية 
تاريخ الاضافة على الموقع : Sunday, November 11, 2012 

الباحثون

اسم الباحث (عربي)اسم الباحث (انجليزي)نوع الباحثالمرتبة العلميةالبريد الالكتروني
R. M. HarrisonHarrison, R. M. باحث  
D. C. S. BeddowsBeddows, D. C. S. باحث  
L. HuHu, L. باحث  
J. YinYin, J. باحث  

الملفات

اسم الملفالنوعالوصف
 34309.pdf pdfComparison of methods for evaluation of wood smoke and estimation of UK ambient concentrations

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