Summertime Ozone Production at Carlsbad Caverns National Park, New Mexico: Influence of Oil and Natural Gas Development DOI Creative Commons
Andrey Marsavin, Da Pan, I. B. Pollack

и другие.

Journal of Geophysical Research Atmospheres, Год журнала: 2024, Номер 129(14)

Опубликована: Июль 16, 2024

Abstract Southeastern New Mexico's Carlsbad Caverns National Park (CAVE) has increasingly experienced summertime ozone (O 3 ) exceeding an 8‐hr average of 70 parts per billion by volume (ppbv). The park is located in the western part Permian oil and natural gas (O&G) basin, where production rates have increased fivefold last decade. We investigate O –precursor relationships constraining F0AM box model to observations nitrogen oxides (NO x = NO + 2 a suite volatile organic compounds (VOCs) collected at CAVE during summer 2019. O&G‐related VOCs dominated calculated VOC reactivity with hydroxyl radicals (OH) on days when concentrations were primarily controlled local photochemistry. Radical budget analysis showed that levels high enough impose sensitivity morning hours, while subsequent loss through photochemical consumption led ‐sensitive conditions afternoon. Maximum daily was responsive both reductions, reductions proving most effective. underestimated observed 5‐day episode influenced photochemically aged O&G emissions, as indicated back‐trajectory analysis, low i‐ / n ‐pentane ratios, enhanced secondary VOCs, ratios total reactive oxidized y ). Model‐observation agreement improved , which approximates time emission, indicating large fraction this formed nonlocally.

Язык: Английский

Examining the Summertime Ozone Formation Regime in Southeast Michigan Using MOOSE Ground‐Based HCHO/NO2 Measurements and F0AM Box Model DOI
Xiong Ying, Jiajue Chai, Huiting Mao

и другие.

Journal of Geophysical Research Atmospheres, Год журнала: 2023, Номер 128(19)

Опубликована: Сен. 15, 2023

Abstract Ambient ozone (O 3 ) concentrations in Southeast Michigan (SEMI) can exceed the U.S. National Air Quality Standard. Despite past efforts to measure O precursors and elucidate reaction mechanisms, changing emission patterns atmospheric composition SEMI warrant new measurements updated mechanisms understand causes of observed exceedances. In this study, we examine chemical drivers exceedances SEMI, based on Phase I MOOSE (Michigan‐Ontario Ozone Source Experiment) field study performed during May June 2021. A zero‐dimensional (0‐D) box model is constrained with measurement data meteorology trace gas concentrations. Box sensitivity simulations suggest that formaldehyde nitrogen dioxide ratio (HCHO/NO 2 for transition between volatile organic compounds (VOCs)‐ oxides (NO x )‐limited production regimes 3.0 ± 0.3 SEMI. The midday (12:00–16:00) averaged HCHO/NO 1.62 1.03, suggesting limited by VOC emissions. This finding implies imposing stricter regulations emissions should be prioritized nonattainment area. through its use ground‐based ratios modeling assess ‐VOC‐NO sensitivities, has significant implications air quality policy design effective pollution control strategies, especially areas.

Язык: Английский

Процитировано

6
Impact of wildfire smoke on ozone concentrations using a Generalized Additive model in Salt Lake City, Utah, USA, 2006–2022 DOI
Haebum Lee, Daniel A. Jaffe

Journal of the Air & Waste Management Association, Год журнала: 2023, Номер 74(2), С. 116 - 130

Опубликована: Дек. 5, 2023

We investigated the impact of wildfires on maximum daily 8-hr average ozone concentrations (MDA8 O

Язык: Английский

Процитировано

6
The Measured Impact of Wildfires on Ozone in Western Canada From 2001 to 2019 DOI Creative Commons
Stephanie R. Schneider, B Shi, Jonathan P. D. Abbatt

и другие.

Journal of Geophysical Research Atmospheres, Год журнала: 2024, Номер 129(4)

Опубликована: Фев. 14, 2024

Abstract The impacts on atmospheric ozone (O 3 ) due to wildfires are difficult characterize the many factors that affect O 's formation rate and episodic nature of fire events. This study uses a very large set air quality data (518,987 6‐hr points) collected in Western Canada from 2001 2019 determine prevalence severity fire‐driven increases measured values. Wildfire events identified using automated Trajectory‐Fire Interception Method (TFIM), looking for interceptions between HYSPLIT back‐trajectories wildfire hotspots. As with other studies, which have used more restricted sets measurements, results this large‐scale, data‐driven approach indicate mixing ratio impact, average ∼2 ppbv across all time periods. To understand lead largest increases, better compare studies at individual events, classified their distance measurement location, measurement, corresponding PM 2.5 value. Increases during daytime, when fires occur close measurements > 25 μg/m . When an upper‐limit correction bias UV photometric detection MnCl 2 scrubbers is applied, analysis still yields persistent increase except highest levels. However, accurate potential needed fully magnitude impact

Язык: Английский

Процитировано

2
A Preliminary Case Study on the Compounding Effects of Local Emissions and Upstream Wildfires on Urban Air Pollution DOI Creative Commons
Daniel Mendoza, Erik T. Crosman, Tabitha M. Benney

и другие.

Fire, Год журнала: 2024, Номер 7(6), С. 184 - 184

Опубликована: Май 29, 2024

Interactions between urban and wildfire pollution emissions are active areas of research, with numerous aircraft field campaigns satellite analyses being conducted in recent years. Several studies have found that elevated ozone particulate levels both generally associated smoke areas. We measured pollutant concentrations at two Utah Division Air Quality regulatory air quality observation sites a local hot spot (a COVID-19 testing site) within 48 h period increasing impacts occurred Salt Lake City, UT (USA) 20 22 August 2020. The plume, which passed through the study area during an summer, resulted increased criteria greenhouse gas concentrations. Methane (CH4) fine matter (PM2.5) comparable rates, NOx led to more ozone. nitrogen oxide/ozone (NOx/O3) cycle was clearly demonstrated throughout period, titration reducing nighttime These findings help illustrate how compounding effects exceptional events, such as wildfires, may pose substantial health risks. This preliminary case supports conducting expanded, longer-term on interactions variable intensity plumes exposure, addition subsequent need inform risk policy these complex systems.

Язык: Английский

Процитировано

2
Summertime Ozone Production at Carlsbad Caverns National Park, New Mexico: Influence of Oil and Natural Gas Development DOI Creative Commons
Andrey Marsavin, Da Pan, I. B. Pollack

и другие.

Journal of Geophysical Research Atmospheres, Год журнала: 2024, Номер 129(14)

Опубликована: Июль 16, 2024

Abstract Southeastern New Mexico's Carlsbad Caverns National Park (CAVE) has increasingly experienced summertime ozone (O 3 ) exceeding an 8‐hr average of 70 parts per billion by volume (ppbv). The park is located in the western part Permian oil and natural gas (O&G) basin, where production rates have increased fivefold last decade. We investigate O –precursor relationships constraining F0AM box model to observations nitrogen oxides (NO x = NO + 2 a suite volatile organic compounds (VOCs) collected at CAVE during summer 2019. O&G‐related VOCs dominated calculated VOC reactivity with hydroxyl radicals (OH) on days when concentrations were primarily controlled local photochemistry. Radical budget analysis showed that levels high enough impose sensitivity morning hours, while subsequent loss through photochemical consumption led ‐sensitive conditions afternoon. Maximum daily was responsive both reductions, reductions proving most effective. underestimated observed 5‐day episode influenced photochemically aged O&G emissions, as indicated back‐trajectory analysis, low i‐ / n ‐pentane ratios, enhanced secondary VOCs, ratios total reactive oxidized y ). Model‐observation agreement improved , which approximates time emission, indicating large fraction this formed nonlocally.

Язык: Английский

Процитировано

2