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DOI | 10.1016/j.atmosenv.2014.01.021 |
On-road black carbon instrument intercomparison and aerosol characteristics by driving environment | |
Holder, Amara L.; Hagler, Gayle S. W.; Yelverton, Tiffany L. B.; Hays, Michael D. | |
发表日期 | 2014-05-01 |
ISSN | 1352-2310 |
卷号 | 88页码:183-191 |
英文摘要 | Large spatial variations of black carbon (BC) concentrations in the on-road and near-road environments necessitate measurements with high spatial resolution to assess exposure accurately. A series of measurements was made comparing the performance of several different BC instruments (Single Particle Soot Photometer, Photo-Acoustic Soot Spectrometer, and Aethalometer) for high time resolution mobile measurements, capable of mapping spatial gradients. All instruments were highly correlated at high time resolution (r(2) = 0.80-0.89 at a 2-s resolution), however the slope ranged from 0.52 to 1.03, with the Single Particle Soot Photometer (SP2) consistently reporting the lowest BC concentrations. BC and ultrafine particle (UFP) concentrations were two-fold higher on the highway compared to surrounding roads with lower traffic counts. The BC size distribution had a mass median diameter of approximately 120 nm, which was smaller and less coated than aged urban BC. Mean UFP and BC concentrations were 2 and 1.4 times greater, respectively, during free flowing traffic on the highway compared with times when there was stop-and-go congestion, providing evidence that transit time is not a good predictor of BC or UFP exposure. Published by Elsevier Ltd. |
英文关键词 | Ultrafine particles;Size distribution;Light absorption;Mobile source |
语种 | 英语 |
WOS记录号 | WOS:000335104300021 |
来源期刊 | ATMOSPHERIC ENVIRONMENT |
来源机构 | 美国环保署 |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/60686 |
作者单位 | US EPA, Natl Risk Management Lab, Off Res & Dev, Res Triangle Pk, NC 27709 USA |
推荐引用方式 GB/T 7714 | Holder, Amara L.,Hagler, Gayle S. W.,Yelverton, Tiffany L. B.,et al. On-road black carbon instrument intercomparison and aerosol characteristics by driving environment[J]. 美国环保署,2014,88:183-191. |
APA | Holder, Amara L.,Hagler, Gayle S. W.,Yelverton, Tiffany L. B.,&Hays, Michael D..(2014).On-road black carbon instrument intercomparison and aerosol characteristics by driving environment.ATMOSPHERIC ENVIRONMENT,88,183-191. |
MLA | Holder, Amara L.,et al."On-road black carbon instrument intercomparison and aerosol characteristics by driving environment".ATMOSPHERIC ENVIRONMENT 88(2014):183-191. |
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