Improved Spatial Resolution in Modeling of Nitrogen Oxide Concentrations in the Los Angeles Basin

Yu, Katelyn A.; Li, Meng; Harkins, Colin; He, Jian; Zhu, Qindan; Verreyken, Bert; Schwantes, Rebecca H.; Cohen, Ronald C.; McDonald, Brian C.; Harley, Robert A.

doi:10.1021/acs.est.3c06158

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The NOAA IR serves as an archival repository of NOAA-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by NOAA or funded partners. As a repository, the NOAA IR retains documents in their original published format to ensure public access to scientific information.

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Improved Spatial Resolution in Modeling of Nitrogen Oxide Concentrations in the Los Angeles Basin

2023
By Yu, Katelyn A. ; Li, Meng ; Harkins, Colin ; ...
Source: Environmental Science & Technology, 57(49), 20689-20698

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Journal Title:

Environmental Science & Technology
Personal Author:

Yu, Katelyn A. ; Li, Meng ; Harkins, Colin ; He, Jian ; Zhu, Qindan ; ... More +

Yu, Katelyn A. ; Li, Meng ; Harkins, Colin ; He, Jian ; Zhu, Qindan ; Verreyken, Bert ; Schwantes, Rebecca H. ; Cohen, Ronald C. ; McDonald, Brian C. ; Harley, Robert A. Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; CIRES (Cooperative Institute for Research in Environmental Sciences) ; CSL (Chemical Sciences Laboratory) ; ESRL (Earth System Research Laboratory)

OAR (Oceanic and Atmospheric Research) ; CIRES (Cooperative Institute for Research in Environmental Sciences) ; CSL (Chemical Sciences Laboratory) ; ESRL (Earth System Research Laboratory) Less -
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.
Source:

Environmental Science & Technology, 57(49), 20689-20698
DOI:

https://doi.org/10.1021/acs.est.3c06158
ISSN:

0013-936X;1520-5851;
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PDF
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American Chemical Society (ACS)
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Journal Article
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https://creativecommons.org/licenses/by/4.0/
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CC BY
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Submitted
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urn:sha-512:9b085c81a0941a15c2bbab6f9780ec8db3096012fdd2de2de6a1216c64c4f188d73f5f9b9325f0dd6b751254b41b467a8cb7fa7c0cd54f702e2fd7b69811888d
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https://repository.library.noaa.gov/view/noaa/65937/noaa_65937_DS1.pdf
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Improved Spatial Resolution in Modeling of Nitrogen Oxide Concentrations in the Los Angeles Basin

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