کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5752875 | 1620308 | 2017 | 21 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ambient peroxyacyl nitrate concentration and regional transportation in Beijing
ترجمه فارسی عنوان
غلظت نیتروژن محیطی و پتروشیمی منطقه ای در پکن
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موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علم هواشناسی
چکیده انگلیسی
Peroxyacyl nitrates (PANs) are photochemical secondary pollutants that play a key role in the atmospheric chemistry of the troposphere. However, there have been few studies on the long-term variation and inter-regional transport of PANs. In this study, summertime ambient PAN concentrations were monitored at urban and rural sites in Beijing and Hebei, China, between 2006 and 2014. In Beijing, the peak concentrations of PAN and PPN were in the range of 6-17Â ppbv and 0.6-2.2Â ppbv, respectively, higher than concentrations in other provinces. The nitrogen oxide (NOx) concentration decreased at a rate of 1.7Â ppbv/yr (â¼4% yrâ1), and the PAN concentration decreased at a rate of 0.03Â ppbv/yr (â¼3% yrâ1), while the ozone (O3) concentration increased at a rate of 1.5Â ppbv/yr (â¼4% yrâ1). Trajectory clustering analyses showed that high concentrations of PAN were mainly affected by low air masses transported medium/short distances from South Beijing, and the potential source contribution function maps showed that the likely pollution source area was concentrated in the southern region of Beijing. These findings provide a theoretical basis for pollution control in this region.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Atmospheric Environment - Volume 166, October 2017, Pages 543-550
Journal: Atmospheric Environment - Volume 166, October 2017, Pages 543-550
نویسندگان
Boya Zhang, Bu Zhao, Peng Zuo, Zhi Huang, Jianbo Zhang,