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| DOI | 10.3390/atmos15020199 |
| Effects of Diesel Emissions on Black Carbon and Particle Number Concentrations in the Eastern US | |
| 发表日期 | 2024 |
| EISSN | 2073-4433 |
| 起始页码 | 15 |
| 结束页码 | 2 |
| 卷号 | 15期号:2 |
| 英文摘要 | The effects of emissions of diesel engines on black carbon and particle number concentrations, as well as climate-relevant aerosol properties, are explored for a summertime period in the Eastern U.S. using the chemical transport model PMCAMx-UF. A 50% reduction in diesel particulate emissions results in lower (23%) black carbon mass concentrations, as expected, and similar changes both in magnitude (27-30%) and spatial pattern for the absorption coefficient. However, an average 2% increase in the total particle number concentrations is predicted due to a decrease in the coagulation and condensation sinks and, at the same time, a 2% decrease in N100 (particles larger than 100 nm) concentrations. The diesel reduction results suggest that mitigation of large diesel particles and/or particle mass emissions can reduce climate-relevant properties related to the absorption of black carbon and provide health benefits; however, the changes could also have the unintended effect of increased ultrafine particle number concentrations. Changes in cloud condensation nuclei are predicted to be significantly less than expected, assuming a proportional reduction during this photochemically active period. Doubling the diesel emissions results in a domain-averaged 3% decrease in total particle number concentrations and a 3% increase in N100 concentrations. PM2.5 BC concentrations increase on average by 46%, and similar changes (52-60%) are predicted for the absorption coefficient. Extinction coefficients for both perturbation simulations changed by only a few percent due to the dominance of scattering aerosols in the Eastern U.S. during this period characterized by high photochemical activity. |
| 英文关键词 | diesel; emissions; mitigation; chemical transport modeling; PMCAMx-UF; cloud condensation nuclei |
| 语种 | 英语 |
| WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
| WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
| WOS记录号 | WOS:001168324400001 |
| 来源期刊 | ATMOSPHERE
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/300938 |
| 作者单位 | Carnegie Mellon University; University of Patras; Foundation for Research & Technology - Hellas (FORTH); Institute of Chemical Engineering Sciences (ICE-HT) |
| 推荐引用方式 GB/T 7714 | . Effects of Diesel Emissions on Black Carbon and Particle Number Concentrations in the Eastern US[J],2024,15(2). |
| APA | (2024).Effects of Diesel Emissions on Black Carbon and Particle Number Concentrations in the Eastern US.ATMOSPHERE,15(2). |
| MLA | "Effects of Diesel Emissions on Black Carbon and Particle Number Concentrations in the Eastern US".ATMOSPHERE 15.2(2024). |
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