کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8862645 | 1620116 | 2018 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Characteristics and contributions of biogenic secondary organic aerosol tracers to PM2.5 in Shanghai, China
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موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علم هواشناسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Characteristics and contributions of biogenic secondary organic aerosol tracers to PM2.5 in Shanghai, China Characteristics and contributions of biogenic secondary organic aerosol tracers to PM2.5 in Shanghai, China](/preview/png/8862645.png)
چکیده انگلیسی
To evaluate biogenic secondary organic aerosol (BSOA) tracers from biogenic precursors, fine particles (PM2.5) were collected using filter-based high-volume samplers from spring-summer of 2015 in the central part of Shanghai, China. The results showed that the isoprene SOA tracers exhibited the highest levels (17.64 ± 9.75 ng mâ3) and were always observed along with higher temperatures, which results in a higher tracer formation rate and isoprene emission strength. However, the isoprene SOA tracers showed a weak correlation with the relative humidity (p > 0.05). The isoprene SOA tracers showed remarkable correlations with the [H+] because of the enhanced formation of isoprene SOA in the acidic aerosols. On the basis of these results, 2-methylglyceric acid was determined to have weak correlations with other isoprene tracers, which indicated that it had different formation pathways from those of other isoprene SOA tracers. Cis-pinonic acid had negative correlations with other SOA tracers, indicating that it is the first product in the oxidation process. Furthermore, the isoprene-based tracers (SOCisoprene) were calculated to be 0.031-0.299 μg C mâ3 (with an average of 0.114 ± 0.062 μg C mâ3), which accounted for more than half of the biogenic SOA. The SOC estimation with SOA tracers (SOC tracer-based) averaged 0.155 ± 0.066 μg mâ3, with a range from 0.049 to 0.309 μg mâ3 during the sampling period, which amounted to 2.73% OC.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Atmospheric Pollution Research - Volume 9, Issue 2, March 2018, Pages 179-188
Journal: Atmospheric Pollution Research - Volume 9, Issue 2, March 2018, Pages 179-188
نویسندگان
Wenfei Zhu, Lina Luo, Zhen Cheng, Naiqiang Yan, Shengrong Lou, Yongpeng Ma,