Reference : Atmospheric implications of large C2-C5 alkane emissions from the U.S. oil and gas in...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Earth sciences & physical geography
http://hdl.handle.net/2268/230483
Atmospheric implications of large C2-C5 alkane emissions from the U.S. oil and gas industry
English
Tzompa-Sosa, Z []
Henderson, B H []
Keller, C A []
Travis, K []
Mahieu, Emmanuel mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Groupe infra-rouge de phys. atmosph. et solaire (GIRPAS) >]
Franco, B []
Estes, M []
Helmig, D []
Fried, A []
Richter, D []
Weibring, P []
Walega, J []
Blake, D R []
Hannigan, J W []
Ortega, I []
Conway, S []
Strong, K []
Fischer, E V []
25-Jan-2019
Journal of Geophysical Research. Atmospheres
Wiley
2013
1--22
Yes (verified by ORBi)
International
2169-897X
2169-8996
Hoboken
NJ
[en] oil and gas emissions ; atmospheric composition and trends ; atmospheric monitoring ; GEOS-Chem ; light alkanes
[en] Emissions of C2-C5 alkanes from the U.S. oil and gas sector have changed rapidly over the last decade. We use a nested GEOS-Chem simulation driven by updated 2011NEI emissions with aircraft, surface and column observations to 1) examine spatial patterns in the emissions and observed atmospheric abundances of C2-C5 alkanes over the U.S., and 2) estimate the contribution of emissions from the U.S. oil and gas industry to these patterns. The oil and gas sector in the updated 2011NEI contributes over 80% of the total U.S. emissions of ethane (C2H6) and propane (C3H8), and emissions of these species are largest in the central U.S. Observed mixing ratios of C2-C5 alkanes show enhancements over the central U.S. below 2 km. A nested GEOS-Chem simulation underpredicts observed C3H8 mixing ratios in the boundary layer over several U.S. regions and the relative underprediction is not consistent, suggesting C3H8 emissions should receive more attention moving forward. Our decision to consider only C4-C5 alkane emissions as a single lumped species produces a geographic distribution similar to observations. Due to the increasing importance of oil and gas emissions in the U.S., we recommend continued support of existing long-term measurements of C2-C5 alkanes. We suggest additional monitoring of C2-C5 alkanes downwind of northeastern Colorado, Wyoming and western North Dakota to capture changes in these regions. The atmospheric chemistry modeling community should also evaluate whether chemical mechanisms that lump larger alkanes are sufficient to understand air quality issues in regions with large emissions of these species.
Sphères - SPHERES
http://hdl.handle.net/2268/230483
10.1029/2018JD028955
http://doi.wiley.com/10.1029/2018JD028955

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