کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6337450 | 1310936 | 2016 | 30 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of ambient humidity on the light absorption amplification of black carbon in Beijing during January 2013
ترجمه فارسی عنوان
اثر رطوبت هوا بر تقویت جذب نور کربن سیاه در پکن در ماه ژانویه 2013
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موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علم هواشناسی
چکیده انگلیسی
Black carbon (BC) and its mixing state were measured with a ground-based single particle soot photometer in urban Beijing during the extremely polluted winter of 2013. Up to 70 ± 14% of the BC-containing particles were thickly-coated during periods of haze, compared to 37 ± 9% on non-hazy days. The thickly-coated number fraction (NFBC-thick) increased with increasing BC, reaching a plateau at â¼80-90% when BC concentrations were â¥15 μg mâ3 and visibility was â¤2 km. Regional inflows brought more aged, highly thickly-coated BC to Beijing during haze. The absorption coefficient showed a distinct linear correlation with BC concentration; the mass absorption efficiency (MAE) of BC was acquired, with an overall mean of 4.2 ± 0.01 m2 gâ1 at 870 nm. The MAE of BC amplified with increasing ambient relative humidity. This was largely explained by the increase in NFBC-thick, which was likely due to the enhanced production of secondary aerosol under humid conditions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Atmospheric Environment - Volume 124, Part B, January 2016, Pages 217-223
Journal: Atmospheric Environment - Volume 124, Part B, January 2016, Pages 217-223
نویسندگان
Yunfei Wu, Renjian Zhang, Ping Tian, Jun Tao, S.-C. Hsu, Peng Yan, Qiyuan Wang, Junji Cao, Xiaoling Zhang, Xiangao Xia,