... DC-8 airborne measurements collected during the Korea–United States Air Quality field study and chemical transport models. The observed total OHR (tOHR) averaged in the planetary boundary layer (PBL, <2.0 km) and free troposphere was 5.2 s −1 and 2.0 s −1 during the campaign, respectively...

... leads to the efficient formation of tropospheric ozone (O 3 ), with important consequences for tropospheric oxidative capacity and air quality. The chemical properties of PAN have stimulated the progressive development of remote-sensing products by the satellite community, and recent additions open...

... are credited. See http://creativecommons.org/licenses/by/4.0/ . Nitrogen dioxide Air quality America COVID-19 Transport Counties In late December 2019, a novel coronavirus (COVID-19) emerged in Wuhan and began spreading rapidly around the world ( Isaifan, 2020 ). The virus’s rapid spread...

... Shin; Young-Woo Kim; Jin-Soo Choi; Jin-Soo Park; James J. Szykman; Russell W. Long; Carolyn E. Jordan; Isobel J. Simpson; Alan Fried; Jack E. Dibb; SeogYeon Cho; Yong Pyo Kim The Korea–United States Air Quality (KORUS-AQ) field study was conducted during May–June 2016. The effort was jointly sponsored...

... the original author and source are credited. See http://creativecommons.org/licenses/by/4.0/ . VOCs Air quality Emissions Aerosols Montreal Protocol Aerosols dispensers have been extensively used in professional and consumer products across the globe for over 70 years. Their ease of use...

... it with traditional filter-based methods. In this study, an air quality monitoring campaign was conducted over a period of 25 days at an urban area in Yulin city, southern China, by employing both SPAMS and traditional filter-based measurements to establish the performance of SPAMS. It was observed that the chemical...

... the terms of the Creative Commons Attribution 4.0 International License (CC-BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. See http://creativecommons.org/licenses/by/4.0/ . COVID-19 lockdown Air quality...

... Shin; Hyeon Yeong Park; Changhan Bae; Eunhye Kim The Korea-United States Air Quality (KORUS-AQ) field study was conducted during May–June 2016 to understand the factors controlling air quality in South Korea. Extensive aircraft and ground network observations from the campaign offer an opportunity...

...Heejeong Kim; Junsu Gil; Meehye Lee; Jinsang Jung; Andrew Whitehill; James Szykman; Gangwoong Lee; Deug-Soo Kim; Seogju Cho; Jun-Young Ahn; Jinkyu Hong; Moon-Soo Park; Detlev Helmig; Alex Guenther To understand the characteristics of air quality in the Seoul Metropolitan Area, intensive...

... A. Peterson; Kara D. Lamb; Joshua P. Schwarz; Detlev Helmig; Md Firoz Khan The Korea – United States Air Quality Study (May – June 2016) deployed instrumented aircraft and ground-based measurements to elucidate causes of poor air quality related to high ozone and aerosol concentrations in South Korea...

... within the Eagle Ford. A lack of ambient air quality data, especially in the western shale, impedes a thorough understanding of trace gas emissions within the shale and the subsequent local/regional air quality impacts. Meteorological and trace gas instrumentation was deployed to Shape Ranch...

... of the ozone U.S. National Ambient Air Quality Standard (NAAQS) and was designated a non-attainment area of the standard in 2007. Despite State efforts to curb precursors, ozone has consistently remained above the standard. A growing number of atmospheric studies has provided an ever increasing body...

...-United States Air Quality Study (KORUS-AQ, 2016) are used to explore regional gradients in O 3 and its chemical precursors, and an observationally-constrained 0-D photochemical box model is used to quantify key aspects of O 3 production including its sensitivity to precursor gases. Box model performance...

..., meteorology is the primary factor that drives periods of unhealthy air quality and reduced visibility. The 2016 Korea-United States Air Quality (KORUS-AQ) field study provides a unique opportunity to examine the impact of meteorology on the relative influence of local and transboundary pollution. Much...

... the continental U.S., and evaluate how it influences attainment of the air quality standards. We conclude that spring and summer seasonal mean U.S. background O 3 (USB O 3 ), or O 3 formed from natural sources plus anthropogenic sources in countries outside the U.S., is greatest at high elevation locations...

... city of Chile. Specifically, we focus on the multiple links between mobility and air quality, describe the evolution of these two aspects over the past 30 years, and review the role scientific knowledge has played in policy-making. We show evidence of how technological measures (e.g., fuel quality...

... Pollution Greenhouse gas Air quality Tropospheric ozone is a greenhouse gas and pollutant detrimental to human health and crop and ecosystem productivity (LRTAP Convention, 2011; REVIHAAP, 2013 ; US EPA, 2013 ; Monks et al., 2015 ). Since 1990 a large portion of the anthropogenic emissions...

... information on expected effects of different measures (actions, policies, or interventions) on air quality, often combined with information on noise pollution or mitigation costs. These tools range in complexity and scale of applicability, from city to international, and include one or several polluting...

... are similar than those observed in Houston’s ship channel in 2006 ( Table S2 ), a region with a high density of petrochemical industries ( Gilman et al., 2009 ). While no long-term history of air quality measurements exists for the EFS, the large scale grab sample measurements in spring 2002 presented...

... development areas show that traffic emissions contribute minimally to VOCs in these latter areas. The spatial distributions of pollutant concentrations identified by diffusive sampling techniques have potential utility for validation of emission inventories that are combined with air quality modeling...