| Autor: |
Mari Kauhaniemi, Matthias Ketzel, Jarkko V. Niemi, Bruce Rolstad Denby, Ana Stojiljkovic, Kaarle Kupiainen, Jaakko Kukkonen, Anu Kousa, Ari Karppinen |
| Jazyk: |
angličtina |
| Rok vydání: |
2018 |
| Předmět: |
|
| ISSN: |
1680-7324 |
| Popis: |
We have evaluated numerically how effective a few selected measures would be for reducing road dust. The selected measures included the reduction of the use of studded tyres in light-duty vehicles and phasing-out of salt or sand in traction control. We have evaluated these measures for a street canyon location in central Helsinki, for four years (2007–2009 and 2014). Air quality measurements were conducted in the street canyon for two years, 2009 and 2014. Two road dust emission models, NORTRIP and FORE, were applied in combination with the street canyon dispersion model OSPM to compute the street increments of PM10 within the street canyon. The predicted concentrations were compared with the air quality measurements. Both models reproduced the seasonal variability of the PM10 concentrations but under-predicted the yearly mean values. It was found that the largest reductions of concentrations could potentially be achieved by reducing the fraction of vehicles that use studded tyres. For instance, a 30 % percent decrease in the number of vehicles using studded tyres would result in an average decrease of the non-exhaust increment of PM10 from 10 to 22 %, depending on the model used and the year considered. The corresponding decrease after removal of sanding and salting would be from 4 % and 20 % and from 0.1 % to 4 %, respectively. The results can be used for finding optimal strategies for reducing the high springtime particulate matter concentrations originated from road dust. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
