Impacts of Emissions of C2‐C5 Alkanes From the U.S. Oil and Gas Sector on Ozone and Other Secondary Species

Tzompa‐Sosa, Z. A.; Fischer, E. V.

doi:10.1029/2019JD031935

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Impacts of Emissions of C2‐C5 Alkanes From the U.S. Oil and Gas Sector on Ozone and Other Secondary Species

2020
By Tzompa‐Sosa, Z. A. ; Fischer, E. V.
Source: JGR Atmospheres 126(1): e2019JD031935

[PDF-3.88 MB]

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Journal Title:

Journal of Geophysical Research: Atmospheres
Personal Author:

Tzompa‐Sosa, Z. A. ; Fischer, E. V.

Tzompa‐Sosa, Z. A. ; Fischer, E. V. Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; CPO (Climate Program Office)

OAR (Oceanic and Atmospheric Research) ; CPO (Climate Program Office) Less -
Description:

Inside many U.S. oil and gas-producing regions, the oil and gas sector dominates local anthropogenic emission fluxes of C2-C5 alkanes. Here, we present a detailed analysis of the impact of these emissions on secondary species production over the continental United States using the GEOS-Chem model. Oil- and gas-producing areas in the central United States show the highest summertime surface ozone (O3) enhancements due to oil and gas C2-C5 alkane emissions. The Colorado Front Range is the most impacted 8-hr O3 non-attainment area in the United States with 3-hr daytime instantaneous O3 enhancements >4 ppb. From three selected non-attainment areas, the Colorado Front Range has (1) the lowest monthly mean VOC reactivity (1.5 s−1); (2) the highest percent contribution of oil and gas sources (52%) to calculated VOC reactivity; and (3) the largest relative increases in PAN (peroxyacetyl nitrate), PPN (peroxypropionyl nitrate), and >C4 alkyl nitrates. Enhanced abundances of PAN, PPN, and >C4 alkyl nitrates have the potential to perturb remote O3 production through increased NOx export to remote regions via PAN chemistry. Globally, simulated C2-C5 alkane emissions from the U.S. oil and gas sector contribute 0.5 Tg (~0.17%) to the tropospheric O3 burden with a ~0.27% contribution in the Northern Hemisphere.
Keywords:

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Air Quality Atmospheric Chemistry Ozone
Source:

JGR Atmospheres 126(1): e2019JD031935
DOI:

https://doi.org/10.1029/2019JD031935
Document Type:

Journal Article
Funding:

Grant no. NA14OAR4310148
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Submitted
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urn:sha256:001107b9dc30f3df1084f263fdae59c914c0918cf0af6212a0dc9ca027fb24e0
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https://repository.library.noaa.gov/view/noaa/45527/noaa_45527_DS1.pdf
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