气候变化领域集成服务门户(CCPortal): Effects of Diesel Emissions on Black Carbon and Particle Number Concentrations in the Eastern US

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DOI	10.3390/atmos15020199
	Effects of Diesel Emissions on Black Carbon and Particle Number Concentrations in the Eastern US
	Posner, Laura N.; Pandis, Spyros N.
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/300939
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	Posner, Laura N.,Pandis, Spyros N.. Effects of Diesel Emissions on Black Carbon and Particle Number Concentrations in the Eastern US[J],2024,15(2).
APA	Posner, Laura N.,&Pandis, Spyros N..(2024).Effects of Diesel Emissions on Black Carbon and Particle Number Concentrations in the Eastern US.ATMOSPHERE,15(2).
MLA	Posner, Laura N.,et al."Effects of Diesel Emissions on Black Carbon and Particle Number Concentrations in the Eastern US".ATMOSPHERE 15.2(2024).