Data · dataset · 2026
Ozone production efficiencies in the three largest United State cities from airborne measurements
Listed in National Center for Atmospheric Research
Despite ongoing reductions in emissions of ozone (O 3 ) precursors, nitrogen oxides (NO x = NO + NO 2 ) and volatile organic compounds (VOCs), the three largest urban areas in the United States â New York City (NYC), Chicago, and Los Angeles (LA) â continue to exceed national air quality standards for O 3 .
Description
Airborne measurements during the 2023 Atmospheric Emissions and Reactions Observed from Megacities to Marine Areas (AEROMMA) campaign investigated nonlinear O 3 photochemistry in these cities.
We report mean ozone production efficiency (OPE), the enhancement ratio of O x (= O 3 + NO 2 ) to NO x oxidation products, of 9 ± 4 (1Ï), 6 ± 3, and 6 ± 3 ppbv ppbv â1 in NYC, Chicago, and LA, respectively. Compared to historical values, OPE has increased in NYC but remains constant in LA. We find that OPE during AEROMMA has a nonlinear, inverse relationship with total reactive nitrogen (NO y , a proxy for initial NO x ) and a positive correlation with the nonmethane VOC to NO y enhancement ratio.
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A zero-dimensional photochemical model supports these observed OPE dependences on NO x and VOCs and shows that OPE is a distinct metric from total O 3 production that is informative to the development of O 3 pollution control strategies. We find that OPE values have higher variability, and a larger increase with NO x emissions reductions, in areas that experience NO x -sensitive rather than NO x -saturated O 3 photochemistry; nonetheless, NO x reductions under NO x -sensitive conditions still reduce total O 3 production despite the corresponding increase in OPE.
Links
Get the data
- Publisher page n2t.net/ark:/85065/d7rx9hg5 ↗
documentation · download · from data ucar edu
Where it is published
- data.ucar.edu /dataset/ozone-production-efficiencies-in-the-three-largest-uni… ↗
National Center for Atmospheric Research dataset page
landing page · from data ucar edu
Catalogue records · 1
- CKAN API data.ucar.edu/api/3/action/package_show?id=d0c029ef-29ae-4a5f-8715-ee21ffb9e… ↗
metadata API · from data ucar edu
Topics
- From keywords
- Earth & Environmental Science · Ocean & Atmospheric Science
- Inferred from text
- Atmospheric sciences 70%
Provenance · 1 source records, 8 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| National Center for Atmospheric Research | d0c029ef-29ae-4a5f-8715-ee21ffb9e863 | 11 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| concepts[field].anzsrc:group:3701 | enrichment · data ucar edu | taxonomy-embedding@1.1.0 | title+keywords+description (70%) |
| concepts[field].local:field:earth-environmental | mapping · data ucar edu | connector:data_ucar_edu@1.0.0 | |
| concepts[field].local:field:ocean-atmospheric | mapping · data ucar edu | connector:data_ucar_edu@1.0.0 | |
| created_date | source · data ucar edu | connector:data_ucar_edu@1.0.0 | |
| description | source · data ucar edu | connector:data_ucar_edu@1.0.0 | /notes |
| publication_date | source · data ucar edu | connector:data_ucar_edu@1.0.0 | |
| title | source · data ucar edu | connector:data_ucar_edu@1.0.0 | /title |
| updated_date | source · data ucar edu | connector:data_ucar_edu@1.0.0 |