后季风季节道路运输对德里PM2.5污染的影响

IF 3.8 Q2 ENVIRONMENTAL SCIENCES
Caterina Mogno , Paul I. Palmer , Margaret R. Marvin , Sumit Sharma , Ying Chen , Oliver Wild
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引用次数: 1

摘要

我们使用WRF-Chem大气化学运输模型,在当地排放清单的驱动下,量化了季风后季节德里地区道路交通排放对地面PM2.5的贡献。我们将这一贡献与其他地方(在德里)和区域(在更广泛的国家首都地区,NCR)的人为部门进行比较,在季风后时期,季节性燃烧和停滞的气象条件加剧了基线污染水平。我们发现,当地公路运输对德里日均PM2.5的贡献约为10%,如果包括NCR的区域公路运输来源,则上升至17%。对德里日均PM2.5最大的个人贡献来自地区电力和工业(14%)以及家庭(11%)部门,主要是夜间和几乎所有白天的浓度。发现NCR以外来源的长距离运输贡献约占40%。当地公路运输部门对日平均PM2.5的贡献在晚间交通高峰期间最大(18%)。其中,两轮车和三轮车占主导地位(50%),其次是重型车辆(30%),它们在一天中的任何时候也占公路运输总量的60-70%。乘用车和轻型车辆以及道路悬浮粉尘对日平均PM2.5的贡献很小(20%)。我们的工作强调了在制定有效政策以满足德里季风后PM2.5空气质量标准时需要考虑的两个重要因素。首先,需要采取多部门、多规模的方法,优先减少德里市内的交通运输排放,依次是区域工业、家庭和交通运输的NCR排放。其次,两轮和三轮车以及重型车辆对PM2.5的影响主要来自公路交通,因此,无论是在德里还是在NCR,都应该优先考虑减少这些车辆的排放。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Road transport impact on PM2.5 pollution over Delhi during the post-monsoon season

We use the WRF-Chem atmospheric chemical transport model, driven by local emission inventories, to quantify the contribution of on-road transport emissions to surface PM2.5 over Delhi during the post-monsoon season. We compare this contribution to other local (within Delhi) and regional (within the broader National Capital Region, NCR) anthropogenic sectors during the post-monsoon period when seasonal burning and stagnating meteorological conditions exacerbate baseline pollution levels. We find that local on-road transport contributes approximately 10% to daily mean PM2.5 over Delhi, rising to 17% if regional on-road transport sources in the NCR are included. The largest individual contributions to Delhi daily mean PM2.5 are from regional power and industry (14%) and domestic (11%) sectors, dominating nighttime and almost all daytime concentrations. Long range transport contribution from sources beyond the NCR is found to account for approximately 40%. The contribution from the local on-road transport sector to diurnal mean PM2.5 is largest (18%) during the evening traffic peak. It is dominated by contributions from two- and three-wheelers (50%) followed by heavy-duty vehicles (30%), which also collectively represent 60–70% of the total on-road transport sector at any hour of the day. The combined contribution from passenger cars and light duty vehicles and from resuspended road dust to daily mean PM2.5 is small (20%). Our work highlights two important factors which need to be considered in developing effective policies to meet PM2.5 air quality standards in Delhi during post-monsoon. First, a multi-sector and multi-scale approach is needed, which prioritise the reduction in local transport emissions within Delhi, and, in the order, regional industries, domestic and transport emissions from NCR. Second, two-and three-wheelers and heavy-duty vehicles dominate on-road transport impact to PM2.5, thus reductions from these vehicles should be given priority, both within Delhi and in the NCR.

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来源期刊
Atmospheric Environment: X
Atmospheric Environment: X Environmental Science-Environmental Science (all)
CiteScore
8.00
自引率
0.00%
发文量
47
审稿时长
12 weeks
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