Observations of VOC emissions and photochemical products over US oil- and gas-producing regions using high-resolution H&amp;lt;sub&amp;gt;3&amp;lt;/sub&amp;gt;O&amp;lt;sup&amp;gt;+&amp;lt;/sup&amp;gt; CIMS (PTR-ToF-MS)

Koss, A.; Yuan, Bin; Warneke, C.; Gilman, J. B.; Lerner, B. M.; Veres, P. R.; Peischl, J.; Eilerman, S. J.; Wild, R. J.; Brown, Steven S.; Thompson, C. R.; Ryerson, Thomas B.; Hanisco, T. F.; Wolfe, G. M.; Clair, Jason M. St.; Thayer, M. P.; Keutsch, Frank N.; Murphy, S. M.; Gouw, J. A. de

doi:10.5194/amt-10-2941-2017

Cited by 49 publications

(60 citation statements)

References 116 publications

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“…Finally, although the NOAA P-3 sampled in the Uinta Basin in Utah, the San Juan Basin in New Mexico and Colorado, and the Permian Basin in Texas and New Mexico (Koss et al, 2017) during SONGNEX, we do not report emissions estimates from those regions due to variable winds that were less conducive to an accurate mass balance analysis. However, these flights may still be used to constrain emissions using inverse modeling techniques, but these studies will need to accurately account for the complex atmospheric transport on these days.…”

Section: Haynesvillementioning

confidence: 99%

Quantifying Methane and Ethane Emissions to the Atmosphere From Central and Western U.S. Oil and Natural Gas Production Regions

et al. 2018

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We present atmospheric measurements of methane (CH4) and ethane (C2H6) taken aboard a National Oceanic and Atmospheric Administration WP‐3D research aircraft in 2015 over oil‐ and natural gas‐producing regions of the central and western United States. We calculate emission rates from the horizontal flux of CH4 and C2H6 in the planetary boundary layer downwind of five of these oil‐ and gas‐producing regions: the Bakken in North Dakota, the Barnett in Texas, the Denver Basin in Colorado, the Eagle Ford in Texas, and the Haynesville in Texas and Louisiana. In general, we find that the enhancement of C2H6 relative to CH4 in the atmosphere is similar to their relative abundances in locally produced natural gas. For the Bakken and Barnett regions, both absolute CH4 emissions and the percentage of produced natural gas emitted to the atmosphere are consistent with previous studies. The percentage of produced natural gas emitted to the atmosphere was lower than in previous studies in the Denver Basin and the Haynesville regions, which may be due to a decrease in drilling activity, an increase in emission controls, or some combination thereof. Finally, we provide the first estimates of basin‐wide emissions from the Eagle Ford region using in situ airborne data and find C2H6 emissions to be greater than those from the Bakken region. Emissions from the Bakken and Eagle Ford regions combined account for 20% of anthropogenic C2H6 emissions in North America.

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Section: Haynesvillementioning

confidence: 99%

Quantifying Methane and Ethane Emissions to the Atmosphere From Central and Western U.S. Oil and Natural Gas Production Regions

et al. 2018

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“…In recent decades, stricter regulations by the U.S. Environmental Protection Agency and state agencies have 20 resulted in lower emissions of black carbon, hydrocarbons (including air toxics), and nitrogen oxides in many urban environments (e.g., Parrish et al, 2002;Peischl et al, 2010;Sather and Cavender 2012;Warneke et al, 2012;Zhou et al, 2014;Kirchstetter et al, 2017) while in other areas, both populated and remote, expansion or emergence of new oil and natural gas (O&G) exploration and production activities has led to higher emissions of air toxics, methane, and non-methane hydrocarbons, e.g., C 2 -C 8 and larger alkanes, benzene and larger aromatic species (e.g., 25 Petron et al, 2012;Gilman et al, 2013;Adgate et al, 2014;Helmig et al, 2014;Pekney et al, 2014;Warneke et al, 2014;Field et al, 2015;Koss et al, 2015;Rutter et al, 2015;Swarthout et al, 2015;Helmig et al, 2016;Prenni et al, 2016;Abeleira et al, 2017;Koss et al, 2017). The impact of higher emissions of such hydrocarbons from oil and gas fields of Utah and Wyoming on wintertime ozone has been assessed through recent measurement and modeling studies (Carter and Seinfeld 2012;Edwards et al, 2014;Rappenglück et al, 2014;Ahmadov et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Sources and Characteristics of Summertime Organic Aerosol in the Colorado Front Range: Perspective from Measurements and WRF-Chem Modeling

Bahreini¹,

Ahmadov²,

McKeen³

et al. 2018

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2O&G sector using the top-down approach, it was estimated that the O&G sector contributed to <5% of total OA, but up to 38% of anthropogenic SOA in the region. The best agreement between the measured and simulated median OA was achieved by limiting the extent of biogenic hydrocarbon aging and consequently biogenic SOA (bSOA) production. Despite a lower production of bSOA in this scenario, contribution of bSOA to total SOA remained high at 40-54%. Future studies aiming at a better emissions characterization of POA and intermediate volatility organic

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“…In recent decades, stricter regulations by the U.S. Environmental Protection Agency and state agencies have resulted in lower emissions of black carbon, hydrocarbons (including air toxics), and nitrogen oxides in many urban environments (e.g., Parrish et al, 2002;Peischl et al, 2010;Sather and Cavender, 2012;Warneke et al, 2012;Zhou et al, 2014;Kirchstetter et al, 2017) while in other areas, both populated and remote, expansion or emergence of new oil and natural gas (O&G) exploration and production activities has led to higher emissions of air toxics, methane, and non-methane hydrocarbons, e.g., C 2 − C 8 and larger alkanes, benzene, and larger aromatic species (e.g., Petron et al, 2012;Adgate et al, 2014;Helmig et al, 2014;Pekney et al, 2014;Warneke et al, 2014;Field et al, 2015;Koss et al, 2015;Rutter et al, 2015;Swarthout et al, 2015;Helmig et al, 2016;Prenni et al, 2016;Abeleira et al, 2017;Koss et al, 2017). The impact of higher emissions of such hydrocarbons from oil and gas fields of Utah and Wyoming on wintertime ozone has been assessed through recent measurement and modeling studies (Carter and Seinfeld, 2012;Rappenglück et al, 2014;Ahmadov et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Sources and characteristics of summertime organic aerosol in the Colorado Front Range: perspective from measurements and WRF-Chem modeling

et al. 2018

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Abstract. The evolution of organic aerosols (OAs) and their precursors in the boundary layer (BL) of the Colorado Front Range during the Front Range Air Pollution and Photochemistry Éxperiment (FRAPPÉ, July-August 2014) was analyzed by in situ measurements and chemical transport modeling. Measurements indicated significant production of secondary OA (SOA), with enhancement ratio of OA with respect to carbon monoxide (CO) reaching 0.085 ± 0.003 µg m −3 ppbv −1 . At background mixing ratios of CO, up to ∼ 1.8 µg m −3 background OA was observed, suggesting significant non-combustion contribution to OA in the Front Range. The mean concentration of OA in plumes with a high influence of oil and natural gas (O&G) emissions was ∼ 40 % higher than in urban-influenced plumes. Positive matrix factorization (PMF) confirmed a dominant contribution of secondary, oxygenated OA (OOA) in the boundary layer instead of fresh, hydrocarbon-like OA (HOA). Combinations of primary OA (POA) volatility assumptions, aging of semivolatile species, and different emission estimates from the O&G sector were used in the Weather Research and Forecasting model coupled with Chemistry (WRF-Chem) simulation scenarios. The assumption of semi-volatile POA resulted in greater than a factor of 10 lower POA concentrations compared to PMF-resolved HOA. Including top-down modified O&G emissions resulted in substantially better agreements in modeled ethane, toluene, hydroxyl radical, and ozone compared to measurements in the high-O&G-influenced plumes. By including emissions from the O&G sector using the topdown approach, it was estimated that the O&G sector contributed to < 5 % of total OA, but up to 38 % of anthropogenic SOA (aSOA) in the region. The best agreement between the measured and simulated median OA was achieved by limiting the extent of biogenic hydrocarbon aging and consequently biogenic SOA (bSOA) production. Despite a Published by Copernicus Publications on behalf of the European Geosciences Union.

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Observations of VOC emissions and photochemical products over US oil- and gas-producing regions using high-resolution H<sub>3</sub>O<sup>+</sup> CIMS (PTR-ToF-MS)

Abstract: Abstract. VOCs related to oil and gas extraction operations in the United States were measured by H 3 O + chemical ionization time-of-flight mass spectrometry (H 3

Cited by 49 publications

References 116 publications

Quantifying Methane and Ethane Emissions to the Atmosphere From Central and Western U.S. Oil and Natural Gas Production Regions

Quantifying Methane and Ethane Emissions to the Atmosphere From Central and Western U.S. Oil and Natural Gas Production Regions

Sources and Characteristics of Summertime Organic Aerosol in the Colorado Front Range: Perspective from Measurements and WRF-Chem Modeling

Sources and characteristics of summertime organic aerosol in the Colorado Front Range: perspective from measurements and WRF-Chem modeling

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