Back to Search
Start Over
Disentangling vehicular emission impact on urban air pollution using ethanol as a tracer
- Source :
- Scientific Reports, Scientific Reports, Nature Publishing Group, 2018, 8 (1), pp.10679-10679. ⟨10.1038/s41598-018-29138-7⟩, Scientific Reports, 2018, 8 (1), pp.10679-10679. ⟨10.1038/s41598-018-29138-7⟩, Scientific Reports, Vol 8, Iss 1, Pp 1-10 (2018)
- Publication Year :
- 2018
- Publisher :
- HAL CCSD, 2018.
-
Abstract
- The Sao Paulo Metropolitan Area is a unique case worldwide due to the extensive use of biofuel, particularly ethanol, by its large fleet of nearly 8 million cars. Based on source apportionment analysis of Organic Aerosols in downtown Sao Paulo, and using ethanol as tracer of passenger vehicles, we have identified primary emissions from light-duty-vehicles (LDV) and heavy-duty-vehicles (HDV), as well as secondary process component. Each of those factors mirror a relevant primary source or secondary process in this densely occupied area. Using those factors as predictors in a multiple linear regression analysis of a wide range of pollutants, we have quantified the role of primary LDV or HDV emissions, as well as atmospheric secondary processes, on air quality degradation. Results show a significant contribution of HDV emissions, despite contributing only about 5% of vehicles number in the region. The latter is responsible, for example, of 40% and 47% of benzene and black carbon atmospheric concentration, respectively. This work describes an innovative use of biofuel as a tracer of passenger vehicle emissions, allowing to better understand the role of vehicular sources on air quality degradation in one of most populated megacities worldwide.
- Subjects :
- 010504 meteorology & atmospheric sciences
Science
[SDE.MCG]Environmental Sciences/Global Changes
Air pollution
010501 environmental sciences
medicine.disease_cause
01 natural sciences
7. Clean energy
Article
TRACER
11. Sustainability
medicine
Air quality index
0105 earth and related environmental sciences
Pollutant
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph]
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere
Multidisciplinary
Environmental engineering
Metropolitan area
Megacity
13. Climate action
Biofuel
Environmental science
Medicine
Multiple linear regression analysis
Subjects
Details
- Language :
- English
- ISSN :
- 20452322
- Database :
- OpenAIRE
- Journal :
- Scientific Reports, Scientific Reports, Nature Publishing Group, 2018, 8 (1), pp.10679-10679. ⟨10.1038/s41598-018-29138-7⟩, Scientific Reports, 2018, 8 (1), pp.10679-10679. ⟨10.1038/s41598-018-29138-7⟩, Scientific Reports, Vol 8, Iss 1, Pp 1-10 (2018)
- Accession number :
- edsair.doi.dedup.....1d4764a9d53003c8e636365d432808da