کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6341190 | 1620394 | 2013 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Black carbon at a roadside site in Beijing: Temporal variations and relationships with carbon monoxide and particle number size distribution
ترجمه فارسی عنوان
کربن سیاه در یک سایت جاده در پکن: تغییرات زمانی و روابط با مونوکسید کربن و توزیع اندازه ذرات
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کلمات کلیدی
کیفیت هوای شهری، کربن سیاه، وسایل دیزلی، ترافیک جاده ای ذرات جامد،
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علم هواشناسی
چکیده انگلیسی
Black carbon (BC), carbon monoxide (CO), and particle number size distribution were measured near a major urban expressway of Beijing during summer and winter field campaigns in 2009. BC was also observed at urban and rural sites. The temporal variations of BC and its relationships with CO and particle number size distribution were analyzed. The average BC concentrations at the roadside site were 12.3 and 17.9 μg mâ3 during the summer and winter campaigns, respectively. BC concentrations ranked in the order of roadside > urban > rural. A general diurnal pattern at all sites showed that the higher BC levels were observed at night. The diurnal pattern of summertime BC at the roadside site followed the variations of heavy-duty diesel vehicles (HDDVs). The increased proportion of HDDVs at night contributed to high ÎBC/ÎCO ratios. This study suggests that HDDVs are an important contributor to nighttime BC and particle number concentrations of both Aitken and accumulation modes near major roadways in Beijing, especially in summer.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Atmospheric Environment - Volume 77, October 2013, Pages 213-221
Journal: Atmospheric Environment - Volume 77, October 2013, Pages 213-221
نویسندگان
Shaojie Song, Ye Wu, Jiayu Xu, Toshimasa Ohara, Shuichi Hasegawa, Jiaqi Li, Liu Yang, Jiming Hao,