Spatiotemporal profiles of ultrafine particles differ from other traffic-related air pollutants : lessons from long-term measurements at fixed sites and mobile monitoring
| Autor: | Kyle P. Messier, Sarah E. Chambliss, Melissa M. Lunden, Joshua S. Apte, Shahzad Gani |
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| Přispěvatelé: | Institute for Atmospheric and Earth System Research (INAR), Helsinki Institute of Sustainability Science (HELSUS) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Pollutant
Insolation Daytime 010504 meteorology & atmospheric sciences education 010501 environmental sciences Atmospheric sciences 01 natural sciences Pollution 114 Physical sciences Analytical Chemistry Air pollutants 13. Climate action Chemistry (miscellaneous) Monitoring data 11. Sustainability Ultrafine particle Environmental Chemistry Particle Environmental science NOx 0105 earth and related environmental sciences |
| Popis: | In the absence of routine monitoring of ultrafine particles (UFP, Dp 1000 h of coverage of a range of road types and land uses. Across all fixed sites, PN concentrations show prominent mid-day peaks during the summer – characteristic of new particle formation – which are not observed for other co-emitted pollutants (NOx, BC, CO). While we find moderate correlation in diurnal patterns of NOx and UFP at sites with high traffic, the correlation drops significantly for low traffic areas, especially during high insolation (e.g., summer daytime) periods. Mobile monitoring data yields similar results: NOx is observed to have weaker correlation with PN for non-highway roads during high insolation periods. The spatiotemporal profiles of UFP can differ strongly from other co-emitted air pollutants when new particle formation contributes a significant share of UFP. |
| Databáze: | OpenAIRE |
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