Back to Search
Start Over
Influence of oil and gas emissions on summertime ozone in the Colorado Northern Front Range
- Source :
- Journal of Geophysical Research: Atmospheres. 121:8712-8729
- Publication Year :
- 2016
- Publisher :
- American Geophysical Union (AGU), 2016.
-
Abstract
- Tropospheric O3 has been decreasing across much of the eastern U.S. but has remained steady or even increased in some western regions. Recent increases in VOC and NOx emissions associated with the production of oil and natural gas (O&NG) may contribute to this trend in some areas. The Northern Front Range of Colorado has regularly exceeded O3 air quality standards during summertime in recent years. This region has VOC emissions from a rapidly developing O&NG basin and low concentrations of biogenic VOC in close proximity to urban-Denver NOx emissions. Here VOC OH reactivity (OHR), O3 production efficiency (OPE), and an observationally constrained box model are used to quantify the influence of O&NG emissions on regional summertime O3 production. Analyses are based on measurements acquired over two summers at a central location within the Northern Front Range that lies between major regional O&NG and urban emission sectors. Observational analyses suggest that mixing obscures any OPE differences in air primarily influenced by O&NG or urban emission sector. The box model confirms relatively modest OPE differences that are within the uncertainties of the field observations. Box model results also indicate that maximum O3 at the measurement location is sensitive to changes in NOx mixing ratio but also responsive to O&NG VOC reductions. Combined, these analyses show that O&NG alkanes contribute over 80% to the observed carbon mixing ratio, roughly 50% to the regional VOC OHR, and approximately 20% to regional photochemical O3 production.
- Subjects :
- Atmospheric Science
Ozone
010504 meteorology & atmospheric sciences
business.industry
Fossil fuel
Front (oceanography)
chemistry.chemical_element
010501 environmental sciences
01 natural sciences
Troposphere
chemistry.chemical_compound
Geophysics
chemistry
Space and Planetary Science
Climatology
Earth and Planetary Sciences (miscellaneous)
Mixing ratio
Environmental science
business
Carbon
Air quality index
NOx
0105 earth and related environmental sciences
Subjects
Details
- ISSN :
- 2169897X
- Volume :
- 121
- Database :
- OpenAIRE
- Journal :
- Journal of Geophysical Research: Atmospheres
- Accession number :
- edsair.doi...........839265b1772080851390e1dbf9e80c24