Improved Spatial Resolution in Modeling of Nitrogen Oxide Concentrations in the Los Angeles Basin
| dc.contributor.author | Yu, K.A. | |
| dc.contributor.author | Li, M. | |
| dc.contributor.author | Harkins, C. | |
| dc.contributor.author | He, J. | |
| dc.contributor.author | Zhu, Q. | |
| dc.contributor.author | Verreyken, B. | |
| dc.contributor.author | Schwantes, R.H. | |
| dc.contributor.author | Cohen, R.C. | |
| dc.contributor.author | McDonald, B.C. | |
| dc.contributor.author | Harley, R.A. | |
| dc.date | 2023 | |
| dc.date.accessioned | 2024-01-10T09:04:09Z | |
| dc.date.available | 2024-01-10T09:04:09Z | |
| dc.identifier.uri | https://orfeo.belnet.be/handle/internal/11249 | |
| dc.description | The extent to which emission control technologies and policies have reduced anthropogenic NOx emissions from motor vehicles is large but uncertain. We evaluate a fuel-based emission inventory for southern California during the June 2021 period, coinciding with the Re-Evaluating the Chemistry of Air Pollutants in CAlifornia (RECAP-CA) field campaign. A modified version of the Fuel-based Inventory of Vehicle Emissions (FIVE) is presented, incorporating 1.3 km resolution gridding and a new light-/medium-duty diesel vehicle category. NOx concentrations and weekday–weekend differences were predicted using the WRF-Chem model and evaluated using satellite and aircraft observations. Model performance was similar on weekdays and weekends, indicating appropriate day-of-week scaling of NOx emissions and a reasonable distribution of emissions by sector. Large observed weekend decreases in NOx are mainly due to changes in on-road vehicle emissions. The inventory presented in this study suggests that on-road vehicles were responsible for 55–72% of the NOx emissions in the South Coast Air Basin, compared to the corresponding fraction (43%) in the planning inventory from the South Coast Air Quality Management District. This fuel-based inventory suggests on-road NOx emissions that are 1.5 ± 0.4, 2.8 ± 0.6, and 1.3 ± 0.7 times the reference EMFAC model estimates for on-road gasoline, light- and medium-duty diesel, and heavy-duty diesel, respectively. | |
| dc.language | eng | |
| dc.title | Improved Spatial Resolution in Modeling of Nitrogen Oxide Concentrations in the Los Angeles Basin | |
| dc.type | Article | |
| dc.subject.frascati | Earth and related Environmental sciences | |
| dc.audience | Scientific | |
| dc.subject.free | Atmospheric chemistry | |
| dc.subject.free | Catalytic reactions | |
| dc.subject.free | Environmental modeling | |
| dc.subject.free | Environmental pollution | |
| dc.subject.free | Fossil fuels | |
| dc.source.title | Environmental Science & Technology | |
| dc.source.volume | 57 | |
| dc.source.issue | 49 | |
| dc.source.page | 20689-20698 | |
| Orfeo.peerreviewed | Yes | |
| dc.identifier.doi | 10.1021/acs.est.3c06158 | |
| dc.identifier.url |
