DOI: 10.1038/s41561-017-0009-0
论文题名: Lower vehicular primary emissions of NO2 in Europe than assumed in policy projections
作者: Grange S.K. ; Lewis A.C. ; Moller S.J. ; Carslaw D.C.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2017
卷: 10, 期: 12 起始页码: 914
结束页码: 918
语种: 英语
Scopus关键词: air quality
; concentration (composition)
; emission inventory
; nitric oxide
; nitrogen dioxide
; pollution policy
; road
; road transport
; roadside environment
; traffic emission
; transport vehicle
; Europe
英文摘要: Many European countries do not meet legal air quality standards for ambient nitrogen dioxide (NO2) near roads; a problem that has been forecasted to persist to 2030. Although European air quality standards regulate NO2 concentrations, emissions standards for new vehicles instead set limits for NO x - the combination of nitric oxide (NO) and NO2. From around 1990 onwards, the total emissions of NO x declined significantly in Europe, but roadside concentrations of NO2 - a regulated species - declined much less than expected. This discrepancy has been attributed largely to the increasing usage of diesel vehicles in Europe and more directly emitted tailpipe NO2. Here we apply a data-filtering technique to 130 million hourly measurements of NO x, NO2 and ozone (O3) from roadside monitoring stations across 61 urban areas in Europe over the period 1990-2015 to estimate the continent-wide trends of directly emitted NO2. We find that the ratio of NO2 to NO x emissions increased from 1995 to around 2010 but has since stabilized at a level that is substantially lower than is assumed in some key emissions inventories. The proportion of NO x now being emitted directly from road transport as NO2 is up to a factor of two smaller than the estimates used in policy projections. We therefore conclude that there may be a faster attainment of roadside NO2 air quality standards across Europe than is currently expected. © 2017 The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/105656
Appears in Collections: 气候减缓与适应 科学计划与规划
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作者单位: Wolfson Atmospheric Chemistry Laboratories, University of York, York, United Kingdom; National Centre for Atmospheric Science, University of York, Heslington, York, United Kingdom; Ricardo Energy and Environment, Harwell, United Kingdom
Recommended Citation:
Grange S.K.,Lewis A.C.,Moller S.J.,et al. Lower vehicular primary emissions of NO2 in Europe than assumed in policy projections[J]. Nature Geoscience,2017-01-01,10(12)