Articles | Volume 19, issue 16
https://doi.org/10.5194/acp-19-10697-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-19-10697-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
26 Aug 2019
Research article |
| 26 Aug 2019
| 26 Aug 2019
Photochemical production of ozone and emissions of NOx and CH4 in the San Joaquin Valley
Justin F. Trousdell
Department of Land, Air, and Water Resources, University of California Davis, Davis, CA, USA
Dani Caputi
Department of Land, Air, and Water Resources, University of California Davis, Davis, CA, USA
Jeanelle Smoot
Department of Chemistry, University of California Davis, Davis, CA, USA
Stephen A. Conley
Scientific Aviation, Inc., Boulder, Colorado, USA
Department of Land, Air, and Water Resources, University of California Davis, Davis, CA, USA
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Subject: Gases | Research Activity: Field Measurements | Altitude Range: Troposphere | Science Focus: Chemistry (chemical composition and reactions)
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Arctic ozone depletion events (ODEs) occur every spring and have vast implications for the oxidizing capacity, radiative balance, and mercury oxidation. In this study, we analyze ozone, ODEs, and their connection to meteorological and air mass history variables through statistical analyses, back trajectories, and machine learning (ML) at Villum Research Station. ODEs are favorable under sunny, calm conditions with air masses arriving from northerly wind directions with sea ice contact.
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Sachin Mishra, Vinayak Sinha, Haseeb Hakkim, Arpit Awasthi, Sachin D. Ghude, Vijay Kumar Soni, Narendra Nigam, Baerbel Sinha, and Madhavan N. Rajeevan
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We quantified 111 gases using mass spectrometry to understand how seasonal and emission changes lead from clean air in the monsoon season to extremely polluted air in the post-monsoon season in Delhi. Averaged total mass concentrations (260 µg m-3) were > 4 times in polluted periods, driven by biomass burning emissions and reduced atmospheric ventilation. Reactive gaseous nitrogen, chlorine, and sulfur compounds hitherto unreported from such a polluted environment were discovered.
Gérard Ancellet, Camille Viatte, Anne Boynard, François Ravetta, Jacques Pelon, Cristelle Cailteau-Fischbach, Pascal Genau, Julie Capo, Axel Roy, and Philippe Nédélec
Atmos. Chem. Phys., 24, 12963–12983, https://doi.org/10.5194/acp-24-12963-2024, https://doi.org/10.5194/acp-24-12963-2024, 2024
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Characterization of ozone pollution in urban areas benefited from a measurement campaign in summer 2022 in the Paris region. The analysis is based on 21 d of lidar and aircraft observations. The main objective is an analysis of the sensitivity of ozone pollution to the micrometeorological processes in the urban atmospheric boundary layer and the transport of regional pollution. The paper also discusses to what extent satellite observations can track observed ozone plumes.
Xiaoyi Zhang, Wanyun Xu, Weili Lin, Gen Zhang, Jinjian Geng, Li Zhou, Huarong Zhao, Sanxue Ren, Guangsheng Zhou, Jianmin Chen, and Xiaobin Xu
Atmos. Chem. Phys., 24, 12323–12340, https://doi.org/10.5194/acp-24-12323-2024, https://doi.org/10.5194/acp-24-12323-2024, 2024
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Ozone (O3) deposition is a key process that removes surface O3, affecting air quality, ecosystems and climate change. We conducted O3 deposition measurement over a wheat canopy using a newly relaxed eddy accumulation flux system. Large variabilities in O3 deposition were detected, mainly determined by crop growth and modulated by various environmental factors. More O3 deposition observations over different surfaces are needed for exploring deposition mechanisms and model optimization.
Honglei Wang, David W. Tarasick, Jane Liu, Herman G. J. Smit, Roeland Van Malderen, Lijuan Shen, Romain Blot, and Tianliang Zhao
Atmos. Chem. Phys., 24, 11927–11942, https://doi.org/10.5194/acp-24-11927-2024, https://doi.org/10.5194/acp-24-11927-2024, 2024
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In this study, we identify 23 suitable pairs of sites from World Ozone and Ultraviolet Radiation Data Centre (WOUDC) and In-service Aircraft for a Global Observing System (IAGOS) datasets (1995 to 2021), compare the average vertical distributions of tropospheric O3 from ozonesonde and aircraft measurements, and analyze the differences based on ozonesonde type and station–airport distance.
Noémie Taquet, Wolfgang Stremme, María Eugenia González del Castillo, Victor Almanza, Alejandro Bezanilla, Olivier Laurent, Carlos Alberti, Frank Hase, Michel Ramonet, Thomas Lauvaux, Ke Che, and Michel Grutter
Atmos. Chem. Phys., 24, 11823–11848, https://doi.org/10.5194/acp-24-11823-2024, https://doi.org/10.5194/acp-24-11823-2024, 2024
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We characterize the variability in CO and CO2 emissions over Mexico City from long-term time-resolved Fourier transform infrared spectroscopy solar absorption and surface measurements from 2013 to 2021. Using the average intraday CO growth rate from total columns, the average CO / CO2 ratio and TROPOMI data, we estimate the interannual variability in the CO and CO2 anthropogenic emissions of Mexico City, highlighting the effect of an unprecedented drop in activity due to the COVID-19 lockdown.
Akima Ringsdorf, Achim Edtbauer, Bruna Holanda, Christopher Poehlker, Marta O. Sá, Alessandro Araújo, Jürgen Kesselmeier, Jos Lelieveld, and Jonathan Williams
Atmos. Chem. Phys., 24, 11883–11910, https://doi.org/10.5194/acp-24-11883-2024, https://doi.org/10.5194/acp-24-11883-2024, 2024
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We show the average height distribution of separately observed aldehydes and ketones over a day and discuss their rainforest-specific sources and sinks as well as their seasonal changes above the Amazon. Ketones have much longer atmospheric lifetimes than aldehydes and thus different implications for atmospheric chemistry. However, they are commonly observed together, which we overcome by measuring with a NO+ chemical ionization mass spectrometer for the first time in the Amazon rainforest.
Theresa Harlass, Rebecca Dischl, Stefan Kaufmann, Raphael Märkl, Daniel Sauer, Monika Scheibe, Paul Stock, Tiziana Bräuer, Andreas Dörnbrack, Anke Roiger, Hans Schlager, Ulrich Schumann, Magdalena Pühl, Tobias Schripp, Tobias Grein, Linda Bondorf, Charles Renard, Maxime Gauthier, Mark Johnson, Darren Luff, Paul Madden, Peter Swann, Denise Ahrens, Reetu Sallinen, and Christiane Voigt
Atmos. Chem. Phys., 24, 11807–11822, https://doi.org/10.5194/acp-24-11807-2024, https://doi.org/10.5194/acp-24-11807-2024, 2024
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Emissions from aircraft have a direct impact on our climate. Here, we present airborne and ground-based measurement data of nitrogen oxides that were collected in the exhaust of an Airbus aircraft. We study the impact of burning fossil and sustainable aviation fuel on nitrogen oxide emissions at different engine settings related to combustor temperature, pressure and fuel flow. Further, we compare observations with engine emission models.
Simone T. Andersen, Max R. McGillen, Chaoyang Xue, Tobias Seubert, Patrick Dewald, Gunther N. T. E. Türk, Jan Schuladen, Cyrielle Denjean, Jean-Claude Etienne, Olivier Garrouste, Marina Jamar, Sergio Harb, Manuela Cirtog, Vincent Michoud, Mathieu Cazaunau, Antonin Bergé, Christopher Cantrell, Sebastien Dusanter, Bénédicte Picquet-Varrault, Alexandre Kukui, Abdelwahid Mellouki, Lucy J. Carpenter, Jos Lelieveld, and John N. Crowley
Atmos. Chem. Phys., 24, 11603–11618, https://doi.org/10.5194/acp-24-11603-2024, https://doi.org/10.5194/acp-24-11603-2024, 2024
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Using measurements of various trace gases in a suburban forest near Paris in the summer of 2022, we were able to gain insight into the sources and sinks of NOx (NO+NO2) with a special focus on their nighttime chemical and physical loss processes. NO was observed as a result of nighttime soil emissions when O3 levels were strongly depleted by deposition. NO oxidation products were not observed at night, indicating that soil and/or foliar surfaces are an efficient sink of reactive N.
Lee Tiszenkel, James H. Flynn, and Shan-Hu Lee
Atmos. Chem. Phys., 24, 11351–11363, https://doi.org/10.5194/acp-24-11351-2024, https://doi.org/10.5194/acp-24-11351-2024, 2024
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Ammonia and amines are important ingredients for aerosol formation in urban environments, but the measurements of these compounds are extremely challenging. Our observations show that urban ammonia and amines in Houston are emitted from urban sources, and diurnal variations in their concentrations are likely governed by gas-to-particle conversion and emissions.
Arpit Awasthi, Baerbel Sinha, Haseeb Hakkim, Sachin Mishra, Varkrishna Mummidivarapu, Gurmanjot Singh, Sachin D. Ghude, Vijay Kumar Soni, Narendra Nigam, Vinayak Sinha, and Madhavan N. Rajeevan
Atmos. Chem. Phys., 24, 10279–10304, https://doi.org/10.5194/acp-24-10279-2024, https://doi.org/10.5194/acp-24-10279-2024, 2024
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We use 111 volatile organic compounds (VOCs), PM10, and PM2.5 in a positive matrix factorization (PMF) model to resolve 11 pollution sources validated with chemical fingerprints. Crop residue burning and heating account for ~ 50 % of the PM, while traffic and industrial emissions dominate the gas-phase VOC burden and formation potential of secondary organic aerosols (> 60 %). Non-tailpipe emissions from compressed-natural-gas-fuelled commercial vehicles dominate the transport sector's PM burden.
Luke D. Schiferl, Cong Cao, Bronte Dalton, Andrew Hallward-Driemeier, Ricardo Toledo-Crow, and Róisín Commane
Atmos. Chem. Phys., 24, 10129–10142, https://doi.org/10.5194/acp-24-10129-2024, https://doi.org/10.5194/acp-24-10129-2024, 2024
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Carbon monoxide (CO) is an air pollutant and an important indicator of the incomplete combustion of fossil fuels in cities. Using 4 years of winter and spring observations in New York City, we found that both the magnitude and variability of CO from the metropolitan area are greater than expected. Transportation emissions cannot explain the missing and variable CO, which points to energy from buildings as a likely underappreciated source of urban air pollution and greenhouse gas emissions.
Chengzhi Xing, Cheng Liu, Chunxiang Ye, Jingkai Xue, Hongyu Wu, Xiangguang Ji, Jinping Ou, and Qihou Hu
Atmos. Chem. Phys., 24, 10093–10112, https://doi.org/10.5194/acp-24-10093-2024, https://doi.org/10.5194/acp-24-10093-2024, 2024
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We identified the contributions of ozone (O3) and nitrous acid (HONO) to the production rates of hydroxide (OH) in vertical space on the Tibetan Plateau (TP). A new insight was offered: the contributions of HONO and O3 to the production rates of OH on the TP are even greater than in lower-altitudes areas. This study enriches the understanding of vertical distribution of atmospheric components and explains the strong atmospheric oxidation capacity (AOC) on the TP.
Baoye Hu, Naihua Chen, Rui Li, Mingqiang Huang, Jinsheng Chen, Youwei Hong, Lingling Xu, Xiaolong Fan, Mengren Li, Lei Tong, Qiuping Zheng, and Yuxiang Yang
EGUsphere, https://doi.org/10.5194/egusphere-2024-2631, https://doi.org/10.5194/egusphere-2024-2631, 2024
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Box modeling with the master chemical mechanism (MCM) was used to address the puzzle of summertime PAN formation and its association with aerosol pollution under high ozone conditions. The MCM model proves to be an ideal tool for investigating PAN photochemical formation (IOA=0.75). The model performed better during the clean period than during the haze period. Through the machine learning method of XGBoost, we found that the top three factors leading to simulation bias were NH3, NO3, and PM2.5.
Xinyuan Zhang, Lingling Wang, Nan Wang, Shuangliang Ma, Shenbo Wang, Ruiqin Zhang, Dong Zhang, Mingkai Wang, and Hongyu Zhang
Atmos. Chem. Phys., 24, 9885–9898, https://doi.org/10.5194/acp-24-9885-2024, https://doi.org/10.5194/acp-24-9885-2024, 2024
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This study highlights the importance of the redox reaction of NO2 with SO2 based on actual atmospheric observations. The particle pH in future China is expected to rise steadily. Consequently, this reaction could become a significant source of HONO in China. Therefore, it is crucial to coordinate the control of SO2, NOx, and NH3 emissions to avoid a rapid increase in the particle pH.
Jun Zhou, Chunsheng Zhang, Aiming Liu, Bin Yuan, Yan Wang, Wenjie Wang, Jie-Ping Zhou, Yixin Hao, Xiao-Bing Li, Xianjun He, Xin Song, Yubin Chen, Suxia Yang, Shuchun Yang, Yanfeng Wu, Bin Jiang, Shan Huang, Junwen Liu, Yuwen Peng, Jipeng Qi, Minhui Deng, Bowen Zhong, Yibo Huangfu, and Min Shao
Atmos. Chem. Phys., 24, 9805–9826, https://doi.org/10.5194/acp-24-9805-2024, https://doi.org/10.5194/acp-24-9805-2024, 2024
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In-depth understanding of the near-ground vertical variability in photochemical ozone (O3) formation is crucial for mitigating O3 pollution. Utilizing a self-built vertical observation system, a direct net photochemical O3 production rate detection system, and an observation-based model, we diagnosed the vertical distributions and formation mechanism of net photochemical O3 production rates and sensitivity in the Pearl River Delta region, one of the most O3-polluted areas in China.
Eleanor J. Derry, Tyler R. Elgiar, Taylor Y. Wilmot, Nicholas W. Hoch, Noah S. Hirshorn, Peter Weiss-Penzias, Christopher F. Lee, John C. Lin, A. Gannet Hallar, Rainer Volkamer, Seth N. Lyman, and Lynne E. Gratz
Atmos. Chem. Phys., 24, 9615–9643, https://doi.org/10.5194/acp-24-9615-2024, https://doi.org/10.5194/acp-24-9615-2024, 2024
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Mercury (Hg) is a globally distributed neurotoxic pollutant. Atmospheric deposition is the main source of Hg in ecosystems. However, measurement biases hinder understanding of the origins and abundance of the more bioavailable oxidized form. We used an improved, calibrated measurement system to study air mass composition and transport of atmospheric Hg at a remote mountaintop site in the central US. Oxidized Hg originated upwind in the low to middle free troposphere under clean, dry conditions.
Benjamin A. Nault, Katherine R. Travis, James H. Crawford, Donald R. Blake, Pedro Campuzano-Jost, Ronald C. Cohen, Joshua P. DiGangi, Glenn S. Diskin, Samuel R. Hall, L. Gregory Huey, Jose L. Jimenez, Kyung-Eun Min, Young Ro Lee, Isobel J. Simpson, Kirk Ullmann, and Armin Wisthaler
Atmos. Chem. Phys., 24, 9573–9595, https://doi.org/10.5194/acp-24-9573-2024, https://doi.org/10.5194/acp-24-9573-2024, 2024
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Ozone (O3) is a pollutant formed from the reactions of gases emitted from various sources. In urban areas, the density of human activities can increase the O3 formation rate (P(O3)), thus impacting air quality and health. Observations collected over Seoul, South Korea, are used to constrain P(O3). A high local P(O3) was found; however, local P(O3) was partly reduced due to compounds typically ignored. These observations also provide constraints for unmeasured compounds that will impact P(O3).
Fan Zhang, Binyu Xiao, Zeyu Liu, Yan Zhang, Chongguo Tian, Rui Li, Can Wu, Yali Lei, Si Zhang, Xinyi Wan, Yubao Chen, Yong Han, Min Cui, Cheng Huang, Hongli Wang, Yingjun Chen, and Gehui Wang
Atmos. Chem. Phys., 24, 8999–9017, https://doi.org/10.5194/acp-24-8999-2024, https://doi.org/10.5194/acp-24-8999-2024, 2024
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Mandatory use of low-sulfur fuel due to global sulfur limit regulations means large uncertainties in volatile organic compound (VOC) emissions. On-board tests of VOCs from nine cargo ships in China were carried out. Results showed that switching from heavy-fuel oil to diesel increased emission factor VOCs by 48 % on average, enhancing O3 and the secondary organic aerosol formation potential. Thus, implementing a global ultra-low-sulfur oil policy needs to be optimized in the near future.
Patrick Dewald, Tobias Seubert, Simone T. Andersen, Gunther N. T. E. Türk, Jan Schuladen, Max R. McGillen, Cyrielle Denjean, Jean-Claude Etienne, Olivier Garrouste, Marina Jamar, Sergio Harb, Manuela Cirtog, Vincent Michoud, Mathieu Cazaunau, Antonin Bergé, Christopher Cantrell, Sebastien Dusanter, Bénédicte Picquet-Varrault, Alexandre Kukui, Chaoyang Xue, Abdelwahid Mellouki, Jos Lelieveld, and John N. Crowley
Atmos. Chem. Phys., 24, 8983–8997, https://doi.org/10.5194/acp-24-8983-2024, https://doi.org/10.5194/acp-24-8983-2024, 2024
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In the scope of a field campaign in a suburban forest near Paris in the summer of 2022, we measured the reactivity of the nitrate radical NO3 towards biogenic volatile organic compounds (BVOCs; e.g. monoterpenes) mainly below but also above the canopy. NO3 reactivity was the highest during nights with strong temperature inversions and decreased strongly with height. Reactions with BVOCs were the main removal process of NO3 throughout the diel cycle below the canopy.
Jian Wang, Lei Xue, Qianyao Ma, Feng Xu, Gaobin Xu, Shibo Yan, Jiawei Zhang, Jianlong Li, Honghai Zhang, Guiling Zhang, and Zhaohui Chen
Atmos. Chem. Phys., 24, 8721–8736, https://doi.org/10.5194/acp-24-8721-2024, https://doi.org/10.5194/acp-24-8721-2024, 2024
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This study investigated the distribution and sources of non-methane hydrocarbons (NMHCs) in the lower atmosphere over the marginal seas of China. NMHCs, a subset of volatile organic compounds (VOCs), play a crucial role in atmospheric chemistry. Derived from systematic atmospheric sampling in coastal cities and marginal sea regions, this study offers valuable insights into the interaction between land and sea in shaping offshore atmospheric NMHCs.
Yusheng Zhang, Feixue Zheng, Zemin Feng, Chaofan Lian, Weigang Wang, Xiaolong Fan, Wei Ma, Zhuohui Lin, Chang Li, Gen Zhang, Chao Yan, Ying Zhang, Veli-Matti Kerminen, Federico Bianch, Tuukka Petäjä, Juha Kangasluoma, Markku Kulmala, and Yongchun Liu
Atmos. Chem. Phys., 24, 8569–8587, https://doi.org/10.5194/acp-24-8569-2024, https://doi.org/10.5194/acp-24-8569-2024, 2024
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The nitrous acid (HONO) budget was validated during a COVID-19 lockdown event. The main conclusions are (1) HONO concentrations showed a significant decrease from 0.97 to 0.53 ppb during lockdown; (2) vehicle emissions accounted for 53 % of nighttime sources, with the heterogeneous conversion of NO2 on ground surfaces more important than aerosol; and (3) the dominant daytime source shifted from the homogenous reaction between NO and OH (51 %) to nitrate photolysis (53 %) during lockdown.
Dong Zhang, Xiao Li, Minghao Yuan, Yifei Xu, Qixiang Xu, Fangcheng Su, Shenbo Wang, and Ruiqin Zhang
Atmos. Chem. Phys., 24, 8549–8567, https://doi.org/10.5194/acp-24-8549-2024, https://doi.org/10.5194/acp-24-8549-2024, 2024
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The increasing concentration of O3 precursors and unfavorable meteorological conditions are key factors in the formation of O3 pollution in Zhengzhou. Vehicular exhausts (28 %), solvent usage (27 %), and industrial production (22 %) are identified as the main sources of NMVOCs. Moreover, O3 formation in Zhengzhou is found to be in an anthropogenic volatile organic compound (AVOC)-limited regime. Thus, to reduce O3 formation, a minimum AVOCs / NOx reduction ratio ≥ 3 : 1 is recommended.
Yuening Li, Faqiang Zhan, Chubashini Shunthirasingham, Ying Duan Lei, Jenny Oh, Amina Ben Chaaben, Zhe Lu, Kelsey Lee, Frank A. P. C. Gobas, Hayley Hung, and Frank Wania
EGUsphere, https://doi.org/10.5194/egusphere-2024-1883, https://doi.org/10.5194/egusphere-2024-1883, 2024
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Organophosphate esters are important man-made trace contaminants. Measuring them in the atmospheric gas phase, particles, precipitation and surface water from Canada, we explore seasonal concentration variability, gas/particle partitioning, precipitation scavenging, and air-water equilibrium. Whereas higher concentrations in summer and efficient precipitation scavenging conform with expectations, the lack of a relationship between compound volatility and gas-particle partitioning is puzzling.
Xiansheng Liu, Xun Zhang, Marvin Dufresne, Tao Wang, Lijie Wu, Rosa Lara, Roger Seco , Marta Monge, Ana Maria Yáñez-Serrano, Marie Gohy, Paul Petit, Audrey Chevalier, Marie-Pierre Vagnot, Yann Fortier, Alexia Baudic, Véronique Ghersi, Grégory Gille, Ludovic Lanzi, Valérie Gros, Leïla Simon, Heidi Hellen, Stefan Reimann, Zoé Le Bras, Michelle Jessy Müller, David Beddows, Siqi Hou, Zongbo Shi, Roy M. Harrison, William Bloss, James Dernie, Stéphane Sauvage, Philip K. Hopke, Xiaoli Duan, Taicheng An, Alastair Lewis, Jim Hopkins, Eleni Liakakou, Nikolaos Mihalopoulos, Xiaohu Zhang, Andrés Alastuey, Xavier Querol, and Thérèse Salameh
EGUsphere, https://doi.org/10.5194/egusphere-2024-2309, https://doi.org/10.5194/egusphere-2024-2309, 2024
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This study examines BTEX (benzene, toluene, ethylbenzene, xylenes) pollution in urban areas across 7 European countries. Analyzing data from 22 monitoring sites, we found traffic and industrial activities significantly impact BTEX levels, with peaks during rush hours. Despite improvements, the risk from BTEX exposure remains moderate, especially in high-traffic and industrial zones. It highlights the need for targeted air quality management to protect public health and improve urban air quality.
Fanhao Meng, Baobin Han, Min Qin, Wu Fang, Ke Tang, Dou Shao, Zhitang Liao, Jun Duan, Yan Feng, Yong Huang, Ting Ni, and Pinhua Xie
EGUsphere, https://doi.org/10.5194/egusphere-2024-2127, https://doi.org/10.5194/egusphere-2024-2127, 2024
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Comprehensive observations of HONO and NOx fluxes were first performed over paddy fields in the Huaihe River Basin. The consecutive peaks in HONO flux and NO flux demonstrated a potentially enhanced release of HONO and NO due to soil tillage, whereas higher WFPS (~80 %) inhibited microbial processes following irrigation. Notably, the biological processes and light-driven NO2 reactions on the surface could both be sources of HONO and influence the local HONO budget during rotary tillage.
Delaney B. Kilgour, Christopher M. Jernigan, Olga Garmash, Sneha Aggarwal, Claudia Mohr, Matt E. Salter, Joel A. Thornton, Jian Wang, Paul Zieger, and Timothy H. Bertram
EGUsphere, https://doi.org/10.5194/egusphere-2024-1975, https://doi.org/10.5194/egusphere-2024-1975, 2024
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We report simultaneous measurements of dimethyl sulfide (DMS) and hydroperoxymethyl thioformate (HPMTF) in the Eastern North Atlantic. We use an observationally constrained box model to show cloud loss is the dominant sink of HPMTF in this region over six weeks, resulting in large reductions in DMS-derived products that contribute to aerosol formation and growth. Our findings indicate that fast cloud processing of HPMTF must be included in global models to accurately capture the sulfur cycle.
Arianna Peron, Martin Graus, Marcus Striednig, Christian Lamprecht, Georg Wohlfahrt, and Thomas Karl
Atmos. Chem. Phys., 24, 7063–7083, https://doi.org/10.5194/acp-24-7063-2024, https://doi.org/10.5194/acp-24-7063-2024, 2024
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The anthropogenic fraction of non-methane volatile organic compound (NMVOC) emissions associated with biogenic sources (e.g., terpenes) is investigated based on eddy covariance observations. The anthropogenic fraction of terpene emissions is strongly dependent on season. When analyzing volatile chemical product (VCP) emissions in urban environments, we caution that observations from short-term campaigns might over-/underestimate their significance depending on local and seasonal circumstances.
Sihang Wang, Bin Yuan, Xianjun He, Ru Cui, Xin Song, Yubin Chen, Caihong Wu, Chaomin Wang, Yibo Huangfu, Xiao-Bing Li, Boguang Wang, and Min Shao
Atmos. Chem. Phys., 24, 7101–7121, https://doi.org/10.5194/acp-24-7101-2024, https://doi.org/10.5194/acp-24-7101-2024, 2024
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Emissions of reactive organic gases from industrial volatile chemical product sources are measured. There are large differences among these industrial sources. We show that oxygenated species account for significant contributions to reactive organic gas emissions, especially for industrial sources utilizing water-borne chemicals.
Qing Yang, Xiao-Bing Li, Bin Yuan, Xiaoxiao Zhang, Yibo Huangfu, Lei Yang, Xianjun He, Jipeng Qi, and Min Shao
Atmos. Chem. Phys., 24, 6865–6882, https://doi.org/10.5194/acp-24-6865-2024, https://doi.org/10.5194/acp-24-6865-2024, 2024
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Online vertical gradient measurements of formic and isocyanic acids were made based on a 320 m tower in a megacity. Vertical variations and sources of the two acids were analyzed in this study. We find that formic and isocyanic acids exhibited positive vertical gradients and were mainly contributed by photochemical formations. The formation of formic and isocyanic acids was also significantly enhanced in urban regions aloft.
Junwei Song, Harald Saathoff, Feng Jiang, Linyu Gao, Hengheng Zhang, and Thomas Leisner
Atmos. Chem. Phys., 24, 6699–6717, https://doi.org/10.5194/acp-24-6699-2024, https://doi.org/10.5194/acp-24-6699-2024, 2024
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This study presents concurrent online measurements of organic gas and particles (VOCs and OA) at a forested site in summer. Both VOCs and OA were largely contributed by oxygenated organic compounds. Semi-volatile oxygenated OA and organic nitrate formed from monoterpenes and sesquiterpenes contributed significantly to nighttime particle growth. The results help us to understand the causes of nighttime particle growth regularly observed in summer in central European rural forested environments.
Jiemeng Bao, Xin Zhang, Zhenhai Wu, Li Zhou, Jun Qian, Qinwen Tan, Fumo Yang, Junhui Chen, Yunfeng Li, Hefan Liu, Liqun Deng, and Hong Li
EGUsphere, https://doi.org/10.5194/egusphere-2024-1204, https://doi.org/10.5194/egusphere-2024-1204, 2024
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Our research in the Chengdu Plain Urban Agglomeration (CPUA), China, reveals significant correlations between carbonyl compounds and ozone pollution, particularly in Chengdu. Formaldehyde, acetone, and acetaldehyde are key contributors to ozone formation. Urgent collaborative actions among cities are needed to mitigate carbonyl-related ozone pollution, stressing the control of NOx and VOCs emissions. Our study offers crucial insights for crafting effective regional pollution control strategies.
Xin Yang, Kimberly Strong, Alison S. Criscitiello, Marta Santos-Garcia, Kristof Bognar, Xiaoyi Zhao, Pierre Fogal, Kaley A. Walker, Sara M. Morris, and Peter Effertz
Atmos. Chem. Phys., 24, 5863–5886, https://doi.org/10.5194/acp-24-5863-2024, https://doi.org/10.5194/acp-24-5863-2024, 2024
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This study uses snow samples collected from a Canadian high Arctic site, Eureka, to demonstrate that surface snow in early spring is a net sink of atmospheric bromine and nitrogen. Surface snow bromide and nitrate are significantly correlated, indicating the oxidation of reactive nitrogen is accelerated by reactive bromine. In addition, we show evidence that snow photochemical release of reactive bromine is very weak, and its emission flux is much smaller than the deposition flux of bromide.
Rebecca M. Garland, Katye E. Altieri, Laura Dawidowski, Laura Gallardo, Aderiana Mbandi, Nestor Y. Rojas, and N'datchoh E. Touré
Atmos. Chem. Phys., 24, 5757–5764, https://doi.org/10.5194/acp-24-5757-2024, https://doi.org/10.5194/acp-24-5757-2024, 2024
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This opinion piece focuses on two geographical areas in the Global South where the authors are based that are underrepresented in atmospheric science. This opinion provides context on common challenges and constraints, with suggestions on how the community can address these. The focus is on the strengths of atmospheric science research in these regions. It is these strengths, we believe, that highlight the critical role of Global South researchers in the future of atmospheric science research.
Heidi Hellén, Rostislav Kouznetsov, Kaisa Kraft, Jukka Seppälä, Mika Vestenius, Jukka-Pekka Jalkanen, Lauri Laakso, and Hannele Hakola
Atmos. Chem. Phys., 24, 4717–4731, https://doi.org/10.5194/acp-24-4717-2024, https://doi.org/10.5194/acp-24-4717-2024, 2024
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Mixing ratios of C2-C5 NMHCs and methanethiol were measured on an island in the Baltic Sea using an in situ gas chromatograph. Shipping emissions were found to be an important source of ethene, ethyne, propene, and benzene. High summertime mixing ratios of methanethiol and dependence of mixing ratios on seawater temperature and height indicated the biogenic origin to possibly be phytoplankton or macroalgae. These emissions may have a strong impact on SO2 production and new particle formation.
Matthew M. Coggon, Chelsea E. Stockwell, Lu Xu, Jeff Peischl, Jessica B. Gilman, Aaron Lamplugh, Henry J. Bowman, Kenneth Aikin, Colin Harkins, Qindan Zhu, Rebecca H. Schwantes, Jian He, Meng Li, Karl Seltzer, Brian McDonald, and Carsten Warneke
Atmos. Chem. Phys., 24, 4289–4304, https://doi.org/10.5194/acp-24-4289-2024, https://doi.org/10.5194/acp-24-4289-2024, 2024
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Residential and commercial cooking emits pollutants that degrade air quality. Here, ambient observations show that cooking is an important contributor to anthropogenic volatile organic compounds (VOCs) emitted in Las Vegas, NV. These emissions are not fully presented in air quality models, and more work may be needed to quantify emissions from important sources, such as commercial restaurants.
Fabien Paulot, Gabrielle Pétron, Andrew M. Crotwell, and Matteo B. Bertagni
Atmos. Chem. Phys., 24, 4217–4229, https://doi.org/10.5194/acp-24-4217-2024, https://doi.org/10.5194/acp-24-4217-2024, 2024
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New data from the National Oceanic and Atmospheric Administration show that hydrogen (H2) concentrations increased from 2010 to 2019, which is consistent with the simulated increase in H2 photochemical production (mainly from methane). But this cannot be reconciled with the expected decrease (increase) in H2 anthropogenic emissions (soil deposition) in the same period. This shows gaps in our knowledge of the H2 biogeochemical cycle that must be resolved to quantify the impact of higher H2 usage.
Wenjie Wang, Bin Yuan, Hang Su, Yafang Cheng, Jipeng Qi, Sihang Wang, Wei Song, Xinming Wang, Chaoyang Xue, Chaoqun Ma, Fengxia Bao, Hongli Wang, Shengrong Lou, and Min Shao
Atmos. Chem. Phys., 24, 4017–4027, https://doi.org/10.5194/acp-24-4017-2024, https://doi.org/10.5194/acp-24-4017-2024, 2024
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This study investigates the important role of unmeasured volatile organic compounds (VOCs) in ozone formation. Based on results in a megacity of China, we show that unmeasured VOCs can contribute significantly to ozone fomation and also influence the determination of ozone control strategy. Our results show that these unmeasured VOCs are mainly from human sources.
Shigeyuki Ishidoya, Satoshi Sugawara, and Atsushi Okazaki
EGUsphere, https://doi.org/10.5194/egusphere-2024-654, https://doi.org/10.5194/egusphere-2024-654, 2024
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Diurnal, seasonal, and interannual variations of the present-day stable isotopic ratio of atmospheric O2, in other words slight variations in the Dole-Morita effect, have been detected firstly. A box model that incorporated biological and water processes associated with the Dole-Morita effect reproduced the general characteristics of the observational results. Based on the findings, we proposed some applications to evaluate oxygen, carbon, and water cycles.
Romain Salignat, Matti Rissanen, Siddharth Iyer, Jean-Luc Baray, Pierre Tulet, Jean-Marc Metzger, Jérôme Brioude, Karine Sellegri, and Clémence Rose
Atmos. Chem. Phys., 24, 3785–3812, https://doi.org/10.5194/acp-24-3785-2024, https://doi.org/10.5194/acp-24-3785-2024, 2024
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Using mass spectrometry data collected at the Maïdo Observatory (2160 m a.s.l., Réunion), we provide the first detailed analysis of molecular cluster chemical composition specifically in the marine free troposphere. The abundance of the identified species is related both to in situ meteorological parameters and air mass history, which also provide insight into their origin. Our work makes an important contribution to documenting the chemistry and physics of the marine free troposphere.
Delaney B. Kilgour, Gordon A. Novak, Megan S. Claflin, Brian M. Lerner, and Timothy H. Bertram
Atmos. Chem. Phys., 24, 3729–3742, https://doi.org/10.5194/acp-24-3729-2024, https://doi.org/10.5194/acp-24-3729-2024, 2024
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Laboratory experiments with seawater mimics suggest ozone deposition to the surface ocean can be a source of reactive carbon to the marine atmosphere. We conduct both field and laboratory measurements to assess abiotic VOC composition and yields from ozonolysis of real surface seawater. We show that C5–C11 aldehydes contribute to the observed VOC emission flux. We estimate that VOCs generated by the ozonolysis of surface seawater are competitive with biological VOC production and emission.
Xiangdong Zheng, Wen Yang, Yuting Sun, Chunmei Geng, Yingying Liu, and Xiaobin Xu
Atmos. Chem. Phys., 24, 3759–3768, https://doi.org/10.5194/acp-24-3759-2024, https://doi.org/10.5194/acp-24-3759-2024, 2024
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Chen et al. (2022) attributed the nocturnal ozone enhancement (NOE) during the night of 31 July 2021 in the North China Plain (NCP) to "the direct stratospheric intrusion to reach the surface". We analyzed in situ data from the NCP. Our results do not suggest that there was a significant impact from the stratosphere on surface ozone during the NOE. We argue that the NOE was not caused by stratospheric intrusion but originated from fresh photochemical production in the lower troposphere.
James M. Roberts, Siyuan Wang, Patrick R. Veres, J. Andrew Neuman, Michael A. Robinson, Ilann Bourgeois, Jeff Peischl, Thomas B. Ryerson, Chelsea R. Thompson, Hannah M. Allen, John D. Crounse, Paul O. Wennberg, Samuel R. Hall, Kirk Ullmann, Simone Meinardi, Isobel J. Simpson, and Donald Blake
Atmos. Chem. Phys., 24, 3421–3443, https://doi.org/10.5194/acp-24-3421-2024, https://doi.org/10.5194/acp-24-3421-2024, 2024
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We measured cyanogen bromide (BrCN) in the troposphere for the first time. BrCN is a product of the same active bromine chemistry that destroys ozone and removes mercury in polar surface environments and is a previously unrecognized sink for active Br compounds. BrCN has an apparent lifetime against heterogeneous loss in the range 1–10 d, so it serves as a cumulative marker of Br-radical chemistry. Accounting for BrCN chemistry is an important part of understanding polar Br cycling.
Kai Qin, Wei Hu, Qin He, Fan Lu, and Jason Blake Cohen
Atmos. Chem. Phys., 24, 3009–3028, https://doi.org/10.5194/acp-24-3009-2024, https://doi.org/10.5194/acp-24-3009-2024, 2024
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We compute CH4 emissions and uncertainty on a mine-by-mine basis, including underground, overground, and abandoned mines. Mine-by-mine gas and flux data and 30 min observations from a flux tower located next to a mine shaft are integrated. The observed variability and bias correction are propagated over the emissions dataset, demonstrating that daily observations may not cover the range of variability. Comparisons show both an emissions magnitude and spatial mismatch with current inventories.
Yao Yan Huang and D. James Donaldson
Atmos. Chem. Phys., 24, 2387–2398, https://doi.org/10.5194/acp-24-2387-2024, https://doi.org/10.5194/acp-24-2387-2024, 2024
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Ground-level ozone interacts at the lake–land boundary; this is important to our understanding and modelling of atmospheric chemistry and air pollution in the lower atmosphere. We show that a steep ozone gradient occurs year-round moving inland up to 1 km from the lake and that this gradient is influenced by seasonal factors on the local land environment, where more rural areas are more greatly affected seasonally.
Katrin Müller, Jordis S. Tradowsky, Peter von der Gathen, Christoph Ritter, Sharon Patris, Justus Notholt, and Markus Rex
Atmos. Chem. Phys., 24, 2169–2193, https://doi.org/10.5194/acp-24-2169-2024, https://doi.org/10.5194/acp-24-2169-2024, 2024
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The Palau Atmospheric Observatory is introduced as an ideal site to detect changes in atmospheric composition and dynamics above the remote tropical western Pacific. We focus on the ozone sounding program from 2016–2021, including El Niño 2016. The year-round high convective activity is reflected in dominant low tropospheric ozone and high relative humidity. Their seasonal distributions are unique compared to other tropical sites and are modulated by the Intertropical Convergence Zone.
Cited articles
Akagi, S. K., Yokelson, R. J., Wiedinmyer, C., Alvarado, M. J., Reid, J. S., Karl, T., Crounse, J. D., and Wennberg, P. O.: Emission factors for open and domestic biomass burning for use in atmospheric models, Atmos. Chem. Phys., 11, 4039–4072, https://doi.org/10.5194/acp-11-4039-2011, 2011.
Almaraz, M., Bai, E., Wang, C., Trousdell, J., Conley, S., Faloona, I., and
Houlton, B. Z.: Agriculture is a major source of NOx pollution in
California, Science Advances, 4, https://doi.org/10.1126/sciadv.aao3477, 2018.
Alvarado, M. J., Logan, J. A., Mao, J., Apel, E., Riemer, D., Blake, D., Cohen, R. C., Min, K.-E., Perring, A. E., Browne, E. C., Wooldridge, P. J., Diskin, G. S., Sachse, G. W., Fuelberg, H., Sessions, W. R., Harrigan, D. L., Huey, G., Liao, J., Case-Hanks, A., Jimenez, J. L., Cubison, M. J., Vay, S. A., Weinheimer, A. J., Knapp, D. J., Montzka, D. D., Flocke, F. M., Pollack, I. B., Wennberg, P. O., Kurten, A., Crounse, J., Clair, J. M. St., Wisthaler, A., Mikoviny, T., Yantosca, R. M., Carouge, C. C., and Le Sager, P.: Nitrogen oxides and PAN in plumes from boreal fires during ARCTAS-B and their impact on ozone: an integrated analysis of aircraft and satellite observations, Atmos. Chem. Phys., 10, 9739–9760, https://doi.org/10.5194/acp-10-9739-2010, 2010.
Arndt, C., Leytem, A. B., Hristov, A. N., Zavala-Araiza, D., Cativiela, J.
P., Conley, S., Daube, C., Faloona, I., and Herndon, S. C.: Short-term
methane emissions from 2 dairy farms in California estimated by different
measurement techniques and US Environmental Protection Agency inventory
methodology: A case study, J. Dairy Sci., 101, 11461–11479,
https://doi.org/10.3168/jds.2017-13881, 2018.
Bandy, A., Faloona, I. C., Blomquist, B. W., Huebert, B. J., Clarke, A. D.,
Howell, S. G., Mauldin, R. L., Cantrell, C. A., Hudson, J. G., Heikes, B.
G., Merrill, J. T., Wang, Y. H., O'Sullivan, D. W., Nadler, W., and Davis,
D. D.: Pacific Atmospheric Sulfur Experiment (PASE): dynamics and chemistry
of the south Pacific tropical trade wind regime, J. Atmos.
Chem., 68, 5–25, https://doi.org/10.1007/s10874-012-9215-8, 2011.
Bianco, L., Djalalova, I. V., King, C. W., and Wilczak, J. M.: Diurnal
Evolution and Annual Variability of Boundary-Layer Height and Its
Correlation to Other Meteorological Variables in California's Central
Valley, Bound.-Lay. Meteorol., 140, 491–511, https://doi.org/10.1007/s10546-011-9622-4,
2011.
Brune, W. H., Baier, B. C., Thomas, J., Ren, X., Cohen, R. C., Pusede, S.
E., Browne, E. C., Goldstein, A. H., Gentner, D. R., Keutsch, F. N.,
Thornton, J. A., Harrold, S., Lopez-Hilfiker, F. D., and Wennberg, P. O.:
Ozone production chemistry in the presence of urban plumes, Faraday
Discuss., 189, 169–189, https://doi.org/10.1039/c5fd00204d, 2016.
Burkholder, J. B., Sander, S. P., Abbatt, J., Barker, J. R., Huie, R. E.,
Kolb, C. E., Kurylo, M. J., Orkin, V. L., Wilmouth, D. M., and Wine, P. H.: Chemical
Kinetics and Photochemical for Use in Atmospheric Studies, Evaluation
No. 18, Jet Propulsion Laboratory, Pasadena, CA, 2015.
Caputi, D. J., Faloona, I., Trousdell, J., Smoot, J., Falk, N., and Conley, S.: Residual layer ozone, mixing, and the nocturnal jet in California's San Joaquin Valley, Atmos. Chem. Phys., 19, 4721–4740, https://doi.org/10.5194/acp-19-4721-2019, 2019.
Cantrell, C. A., Shetter, R. E., Calvert, J. G., Parrish, D. D., Fehsenfeld,
F. C., Goldan, P. D., Kuster, W., Williams, E. J., Westberg, H. H., Allwine,
G., and Martin, R.: Peroxy Radicals as Measured in ROSE and Estimated from Photostationary State Deviations, J. Geophys.
Res.-Atmos., 98, 18355–18366, https://doi.org/10.1029/93jd01794, 1993.
CEPAM: 2016 SIP – Standard Emission Tool, available at: https://www.arb.ca.gov/app/emsinv/fcemssumcat/fcemssumcat2016.php, last access: 16 July 2018.
Conley, S. A., Faloona, I., Miller, G. H., Lenschow, D. H., Blomquist, B., and Bandy, A.: Closing the dimethyl sulfide budget in the tropical marine boundary layer during the Pacific Atmospheric Sulfur Experiment, Atmos. Chem. Phys., 9, 8745–8756, https://doi.org/10.5194/acp-9-8745-2009, 2009.
Conley, S. A., Faloona, I. C., Lenschow, D. H., Campos, T., Heizer, C.,
Weinheimer, A., Cantrell, C. A., Mauldin, R. L., Hornbrook, R. S., Pollack,
I., and Bandy, A.: A complete dynamical ozone budget measured in the
tropical marine boundary layer during PASE, J. Atmos.
Chem., 68, 55–70, https://doi.org/10.1007/s10874-011-9195-0, 2011.
Conley, S. A., Faloona, I. C., Lenschow, D. H., Karion, A., and Sweeney, C.: A Low-Cost System for Measuring Horizontal Winds from Single-Engine Aircraft, J. Atmos. Oceanic Tech., 31, 1312–1320, 2014.
Cox, P., Delao, A., and Kormaniczak, A.: The California Almanac of Emissions
and Air Quality, California Air Resources Board, 246, 2013.
Cui, Y. Y., Brioude, J., Angevine, W. M., Peischl, J., McKeen, S. A., Kim,
S. W., Neuman, J. A., Henze, D. K., Bousserez, N., Fischer, M. L., Jeong,
S., Michelsen, H. A., Bambha, R. P., Liu, Z., Santoni, G. W., Daube, B. C.,
Kort, E. A., Frost, G. J., Ryerson, T. B., Wofsy, S. C., and Trainer, M.:
Top-down estimate of methane emissions in California using a mesoscale
inverse modeling technique: The San Joaquin Valley, J. Geophys.
Res.-Atmos., 122, 3686–3699, https://doi.org/10.1002/2016jd026398, 2017.
de Foy, B.: City-level variations in NOx emissions derived from hourly
monitoring data in Chicago, Atmos. Environ., 176, 128–139, https://doi.org/10.1016/j.atmosenv.2017.12.028, 2018.
Dreessen, J., Sullivan, J., and Delgado, R.: Observations and impacts of
transported Canadian wildfire smoke on ozone and aerosol air quality in the
Maryland region on June 9–12, 2015, J. Air Waste Manage., 66, 842–862, https://doi.org/10.1080/10962247.2016.1161674, 2016.
Dunlea, E. J., Herndon, S. C., Nelson, D. D., Volkamer, R. M., San Martini, F., Sheehy, P. M., Zahniser, M. S., Shorter, J. H., Wormhoudt, J. C., Lamb, B. K., Allwine, E. J., Gaffney, J. S., Marley, N. A., Grutter, M., Marquez, C., Blanco, S., Cardenas, B., Retama, A., Ramos Villegas, C. R., Kolb, C. E., Molina, L. T., and Molina, M. J.: Evaluation of nitrogen dioxide chemiluminescence monitors in a polluted urban environment, Atmos. Chem. Phys., 7, 2691–2704, https://doi.org/10.5194/acp-7-2691-2007, 2007.
Ewing, S. A., Christensen, J. N., Brown, S. T., Vancuren, R. A., Cliff, S.
S., and Depaolo, D. J.: Pb Isotopes as an Indicator of the Asian
Contribution to Particulate Air Pollution in Urban California, Environ.
Sci. Technol., 44, 8911–8916, https://doi.org/10.1021/es101450t, 2010.
Faloona, I., Conley, S. A., Blomquist, B., Clarke, A. D., Kapustin, V.,
Howell, S., Lenschow, D. H., and Bandy, A. R.: Sulfur dioxide in the
tropical marine boundary layer: dry deposition and heterogeneous oxidation
observed during the Pacific Atmospheric Sulfur Experiment, J.
Atmos. Chem., 63, 13–32, https://doi.org/10.1007/s10874-010-9155-0, 2009.
Faloona, I. C., Chiao, S., Eiserloh, A., Alvarez II, R. J., Kirgis, G.,
Langford, A. O., Senff, C. J., Caputi, D., Hu, A., Iraci, L. T., Yates, E. L.,
Marrero, J. E., Ryoo, J.-M., Conley, S., Tanrikulu, S., Xu, J., and Kuwayama, T.: The
California Baseline Ozone Transport Study (CABOTS), B. Am.
Meteorol. Soc., in review, 2019.
Fast, J. D., Gustafson Jr., W. I., Berg, L. K., Shaw, W. J., Pekour, M., Shrivastava, M., Barnard, J. C., Ferrare, R. A., Hostetler, C. A., Hair, J. A., Erickson, M., Jobson, B. T., Flowers, B., Dubey, M. K., Springston, S., Pierce, R. B., Dolislager, L., Pederson, J., and Zaveri, R. A.: Transport and mixing patterns over Central California during the carbonaceous aerosol and radiative effects study (CARES), Atmos. Chem. Phys., 12, 1759–1783, https://doi.org/10.5194/acp-12-1759-2012, 2012.
Garratt, J. R.: The internal boundary-layer – a review, Bound.-Lay.
Meteorol., 50, 171–203, https://doi.org/10.1007/bf00120524, 1990.
Grab, S.: Mountains of the World: A Global Priority, edited by: Messerli, B.
and Ives, J. D., Parthenon Publishing, New York and Carnforth, 1997. ISBN 1
850 70781 2, 495 pp., 2000.
Griffin, R. J., Beckman, P. J., Talbot, R. W., Sive, B. C., and Varner, R.
K.: Deviations from ozone photostationary state during the International
Consortium for Atmospheric Research on Transport and Transformation 2004
campaign: Use of measurements and photochemical modeling to assess potential
causes, J. Geophys. Res.-Atmos., 112, D10S07,
https://doi.org/10.1029/2006JD007604, 2007.
Griffith, S. M., Hansen, R. F., Dusanter, S., Michoud, V., Gilman, J. B.,
Kuster, W. C., Veres, P. R., Graus, M., Gouw, J. A., Roberts, J., Young, C.,
Washenfelder, R., Brown, S. S., Thalman, R., Waxman, E., Volkamer, R., Tsai,
C., Stutz, J., Flynn, J. H., Grossberg, N., Lefer, B., Alvarez, S. L.,
Rappenglueck, B., Mielke, L. H., Osthoff, H. D., and Stevens, P. S.:
Measurements of hydroxyl and hydroperoxy radicals during CalNex-LA: Model
comparisons and radical budgets, J. Geophys. Res.-Atmos., 121, 4211–4232, https://doi.org/10.1002/2015JD024358, 2016.
Handisides, G. M., Plass-Dülmer, C., Gilge, S., Bingemer, H., and Berresheim, H.: Hohenpeissenberg Photochemical Experiment (HOPE 2000): Measurements and photostationary state calculations of OH and peroxy radicals, Atmos. Chem. Phys., 3, 1565–1588, https://doi.org/10.5194/acp-3-1565-2003, 2003.
Hauglustaine, D. A., Brasseur, G. P., Walters, S., Rasch, P. J., Müller, J.-F., Emmons, L. K., and Carroll, M. A.: MOZART, a global chemical transport model for ozone and related chemical tracers: 2. Model results and evaluation, J. Geophys. Res.-Atmos., 103, 28291–28335, 1998.
Henne, S., Furger, M., Nyeki, S., Steinbacher, M., Neininger, B., de Wekker, S. F. J., Dommen, J., Spichtinger, N., Stohl, A., and Prévôt, A. S. H.: Quantification of topographic venting of boundary layer air to the free troposphere, Atmos. Chem. Phys., 4, 497–509, https://doi.org/10.5194/acp-4-497-2004, 2004.
Huang, M., Carmichael, G. R., Adhikary, B., Spak, S. N., Kulkarni, S., Cheng, Y. F., Wei, C., Tang, Y., Parrish, D. D., Oltmans, S. J., D'Allura, A., Kaduwela, A., Cai, C., Weinheimer, A. J., Wong, M., Pierce, R. B., Al-Saadi, J. A., Streets, D. G. and Zhang, Q.: Impacts of transported background ozone on California air quality during the ARCTAS-CARB period – a multi-scale modeling study, Atmos. Chem. Phys., 10, 6947–6968, https://doi.org/10.5194/acp-10-6947-2010, 2010.
Iacobellis, S. F., Norris, J. R., Kanamitsu, M., Tyree, M., and Cayan, D. R.: Climate variability and California low-level temperature inversions :
final paper, California Energy Commission, Sacramento, California, xii, 48 pp., 2009.
Jaeglé, L., Steinberger, L., Martin, R. V., and Chance, K.: Global
partitioning of NOx sources using satellite observations: Relative roles of
fossil fuel combustion, biomass burning and soil emissions, Faraday
Discuss., 130, 407–423, https://doi.org/10.1039/b502128f, 2005.
Jeong, S. G., Newman, S., Zhang, J. S., Andrews, A. E., Bianco, L., Bagley,
J., Cui, X. G., Graven, H., Kim, J., Salameh, P., LaFranchi, B. W., Priest,
C., Campos-Pineda, M., Novakovskaia, E., Sloop, C. D., Michelsen, H. A.,
Bambha, R. P., Weiss, R. F., Keeling, R., and Fischer, M. L.: Estimating
methane emissions in California's urban and rural regions using multitower
observations, J. Geophys. Res.-Atmos., 121, 13031–13049, https://doi.org/10.1002/2016jd025404, 2016.
Jin, L., Harley, R. A., and Brown, N. J.: Ozone pollution regimes modeled
for a summer season in California's San Joaquin Valley: A cluster analysis,
Atmos. Environ., 45, 4707–4718, https://doi.org/10.1016/j.atmosenv.2011.04.064,
2011.
Kawa, S. R. and Pearson, R.: An observational study of stratocumulus
entrainment and thermodynamics, J. Atmos. Sci., 46,
2649–2661, https://doi.org/10.1175/1520-0469(1989)046<2649:aosose>2.0.co;2, 1989.
Kleinman, L., Lee, Y. N., Springston, S. R., Nunnermacker, L., Zhou, X. L.,
Brown, R., Hallock, K., Klotz, P., Leahy, D., Lee, J. H., and Newman, L.:
Ozone formation at a rural site in the southeastern United States, J.
Geophys. Res.-Atmos., 99, 3469–3482, https://doi.org/10.1029/93jd02991, 1994.
Kleinman, L. I., Daum, P. H., Imre, D., Lee, Y. N., Nunnermacker, L. J.,
Springston, S. R., Weinstein-Lloyd, J., and Rudolph, J.: Ozone production
rate and hydrocarbon reactivity in 5 urban areas: A cause of high ozone
concentration in Houston, Geophys. Res. Lett., 29, 1467, https://doi.org/10.1029/2001gl014569, 2002.
Lagarias, J. S. and Sylte, W. W.: Designing and Managing the San Joaquin
Valley Air-Quality Study, J. Air Waste Manage., 41, 1176–1179, https://doi.org/10.1080/10473289.1991.10466912, 1991.
Langford, A. O., Alvarez II, R. J., Kirgis, G., Senff, C. J., Caputi, D., Conley, S. A., Faloona, I. C., Iraci, L. T., Marrero, J. E., McNamara, M. E., Ryoo, J.-M., and Yates, E. L.: Intercomparison of lidar, aircraft, and surface ozone measurements in the San Joaquin Valley during the California Baseline Ozone Transport Study (CABOTS), Atmos. Meas. Tech., 12, 1889–1904, https://doi.org/10.5194/amt-12-1889-2019, 2019.
Lenschow, D. H.: Airplane Measurements of Planetary Boundary Layer
Structure, J. Appl. Meteorol., 9, 874–884, https://doi.org/10.1175/1520-0450(1970)009<0874:amopbl>2.0.co;2, 1970.
Lenschow, D. H., Pearson, R., and Stankov, B. B.: ESTIMATING THE OZONE
BUDGET IN THE BOUNDARY-LAYER BY USE OF AIRCRAFT MEASUREMENTS OF OZONE EDDY
FLUX AND MEAN CONCENTRATION, J. Geophys. Res.-Oceans, 86,
7291–7297, https://doi.org/10.1029/JC086iC08p07291, 1981.
Leukauf, D., Gohm, A., and Rotach, M. W.: Quantifying horizontal and vertical tracer mass fluxes in an idealized valley during daytime, Atmos. Chem. Phys., 16, 13049–13066, https://doi.org/10.5194/acp-16-13049-2016, 2016.
Lin, C.-H.: Impact of Downward-Mixing Ozone on Surface Ozone Accumulation in
Southern Taiwan, J. Air Waste Manage., 58,
562–579, https://doi.org/10.3155/1047-3289.58.4.562, 2008.
Lin, M. Y., Fiore, A. M., Horowitz, L. W., Cooper, O. R., Naik, V.,
Holloway, J., Johnson, B. J., Middlebrook, A. M., Oltmans, S. J., Pollack,
I. B., Ryerson, T. B., Warner, J. X., Wiedinmyer, C., Wilson, J., and Wyman,
B.: Transport of Asian ozone pollution into surface air over the western
United States in spring, J. Geophys. Res.-Atmos., 117, D00V07,
https://doi.org/10.1029/2011jd016961, 2012.
Ma, Y. F., Lu, K. D., Chou, C. C. K., Li, X. Q., and Zhang, Y. H.: Strong
deviations from the NO-NO2-O3 photostationary state in the Pearl River
Delta: Indications of active peroxy radical and chlorine radical chemistry,
Atmos. Environ., 163, 22–34, https://doi.org/10.1016/j.atmosenv.2017.05.012, 2017.
Mannschreck, K., Gilge, S., Plass-Duelmer, C., Fricke, W., and Berresheim, H.: Assessment of the applicability of NO-NO2-O3 photostationary state to long-term measurements at the Hohenpeissenberg GAW Station, Germany, Atmos. Chem. Phys., 4, 1265–1277, https://doi.org/10.5194/acp-4-1265-2004, 2004.
Marr, L. C. and Harley, R. A.: Modeling the effect of weekday-weekend
differences in motor vehicle emissions on photochemical air pollution in
central California, Environ. Sci. Technol., 36, 4099–4106, https://doi.org/10.1021/es020629x, 2002.
Maurizi, A., Russo, F., and Tampieri, F.: Local vs. external contribution to
the budget of pollutants in the Po Valley (Italy) hot spot, Sci. Total
Environ., 458, 459–465, https://doi.org/10.1016/j.scitotenv.2013.04.026, 2013.
Mihelcic, D., Holland, F., Hofzumahaus, A., Hoppe, L., Konrad, S., Musgen,
P., Patz, H. W., Schafer, H. J., Schmitz, T., Volz-Thomas, A., Bachmann, K.,
Schlomski, S., Platt, U., Geyer, A., Alicke, B., and Moortgat, G. K.: Peroxy
radicals during BERLIOZ at Pabstthum: Measurements, radical budgets and
ozone production, J. Geophys. Res.-Atmos., 108, 8254, https://doi.org/10.1029/2001jd001014, 2003.
Miller, S. T. K., Keim, B. D., Talbot, R. W., and Mao, H.: Sea breeze:
Structure, forecasting, and impacts, Rev. Geophys., 41, 1011, https://doi.org/10.1029/2003rg000124, 2003.
Neu, U., Kunzle, T., and Wanner, H.: ON THE RELATION BETWEEN OZONE STORAGE
IN THE RESIDUAL LAYER AND DAILY VARIATION IN NEAR-SURFACE OZONE
CONCENTRATION – A CASE-STUDY, Bound.-Lay. Meteorol., 69, 221–247, https://doi.org/10.1007/bf00708857, 1994.
Noppel, H. and Fiedler, F.: Mesoscale heat transport over complex terrain
by slope winds – A conceptual model and numerical simulations, Bound.-Lay.
Meteorol., 104, 73–97, https://doi.org/10.1023/a:1015556228119, 2002.
Parrish, D. D., Aikin, K. C., Oltmans, S. J., Johnson, B. J., Ives, M., and Sweeny, C.: Impact of transported background ozone inflow on summertime air quality in a California ozone exceedance area, Atmos. Chem. Phys., 10, 10093–10109, https://doi.org/10.5194/acp-10-10093-2010, 2010.
Parrish, D. D., Young, L. M., Newman, M. H., Aikin, K. C., and Ryerson, T.
B.: Ozone Design Values in Southern California's Air Basins: Temporal
Evolution and US Background Contribution, J. Geophys.
Res.-Atmos., 122, 11166–11182, https://doi.org/10.1002/2016jd026329, 2017.
Pfister, G. G., Parrish, D. D., Worden, H., Emmons, L. K., Edwards, D. P., Wiedinmyer, C., Diskin, G. S., Huey, G., Oltmans, S. J., Thouret, V., Weinheimer, A., and Wisthaler, A.: Characterizing summertime chemical boundary conditions for airmasses entering the US West Coast, Atmos. Chem. Phys., 11, 1769–1790, https://doi.org/10.5194/acp-11-1769-2011, 2011.
Pusede, S. E. and Cohen, R. C.: On the observed response of ozone to NOx and VOC reactivity reductions in San Joaquin Valley California 1995–present, Atmos. Chem. Phys., 12, 8323–8339, https://doi.org/10.5194/acp-12-8323-2012, 2012.
Pusede, S. E., Gentner, D. R., Wooldridge, P. J., Browne, E. C., Rollins, A. W., Min, K.-E., Russell, A. R., Thomas, J., Zhang, L., Brune, W. H., Henry, S. B., DiGangi, J. P., Keutsch, F. N., Harrold, S. A., Thornton, J. A., Beaver, M. R., St. Clair, J. M., Wennberg, P. O., Sanders, J., Ren, X., VandenBoer, T. C., Markovic, M. Z., Guha, A., Weber, R., Goldstein, A. H., and Cohen, R. C.: On the temperature dependence of organic reactivity, nitrogen oxides, ozone production, and the impact of emission controls in San Joaquin Valley, California, Atmos. Chem. Phys., 14, 3373–3395, https://doi.org/10.5194/acp-14-3373-2014, 2014.
Quick TUV Calculator: available at: http://cprm.acom.ucar.edu/Models/TUV/Interactive_TUV/, last access: 2 May 2018.
Reed, C., Evans, M. J., Di Carlo, P., Lee, J. D., and Carpenter, L. J.:
Interferences in photolytic NO2 measurements: explanation for an apparent
missing oxidant?, Atmospheric Chemistry and Physics, 16, 4707–4724, https://doi.org/10.5194/acp-16-4707-2016, 2016.
Rotach, M. W., Wohlfahrt, G., Hansel, A., Reif, M., Wagner, J., and Gohm,
A.: THE WORLD IS NOT FLAT Implications for the Global Carbon Balance,
B. Am. Meteorol. Soc., 95, 1021–1028, https://doi.org/10.1175/bams-d-13-00109.1, 2014.
Rotach, M. W., Gohm, A., Lang, M. N., Leukauf, D., Stiperski, I., and
Wagner, J. S.: On the Vertical Exchange of Heat, Mass, and Momentum Over
Complex, Mountainous Terrain, Front. Earth Sci., 3, 76, https://doi.org/10.3389/feart.2015.00076, 2015.
Russell, A. R., Valin, L. C., Bucsela, E. J., Wenig, M. O., and Cohen, R.
C.: Space-based Constraints on Spatial and Temporal Patterns of NOx
Emissions in California, 2005–2008, Environ. Sci. Technol.,
44, 3608–3615, https://doi.org/10.1021/es903451j, 2010.
Ryerson, T. B., Andrews, A. E., Angevine, W. M., Bates, T. S., Brock, C. A.,
Cairns, B., Cohen, R. C., Cooper, O. R., de Gouw, J. A., Fehsenfeld, F. C.,
Ferrare, R. A., Fischer, M. L., Flagan, R. C., Goldstein, A. H., Hair, J.
W., Hardesty, R. M., Hostetler, C. A., Jimenez, J. L., Langford, A. O.,
McCauley, E., McKeen, S. A., Molina, L. T., Nenes, A., Oltmans, S. J.,
Parrish, D. D., Pederson, J. R., Pierce, R. B., Prather, K., Quinn, P. K.,
Seinfeld, J. H., Senff, C. J., Sorooshian, A., Stutz, J., Surratt, J. D.,
Trainer, M., Volkamer, R., Williams, E. J., and Wofsy, S. C.: The 2010
California Research at the Nexus of Air Quality and Climate Change (CalNex)
field study, J. Geophys. Res.-Atmos., 118, 5830–5866, https://doi.org/10.1002/jgrd.50331, 2013.
Small, C. and Cohen, J. E.: Continental Physiography, Climate, and
the Global Distribution of Human Population, Curr. Anthropol., 45,
269–277, https://doi.org/10.1086/382255, 2004.
Singh, H. B., Cai, C., Kaduwela, A., Weinheimer, A., and Wisthaler, A.:
Interactions of fire emissions and urban pollution over California: Ozone
formation and air quality simulations, Atmos. Environ., 56, 45–51, https://doi.org/10.1016/j.atmosenv.2012.03.046, 2012.
Stull, R. B.: An Introduction to Boundary Layer Meteorology, Kluwer Academic
Publishers, Dordrecht, 1988.
Tomich, T. P.: The California nitrogen assessment : challenges and solutions
for people, agriculture, and the environment, University of California
Press, Oakland, California, xxviii, 304 pp., 2016.
Tortell, P. D.: Small-scale heterogeneity of dissolved gas concentrations in
marine continental shelf waters, Geochem. Geophy. Geosy., 6, https://doi.org/10.1029/2005gc000953, 2005.
Trousdell, J. F., Conley, S. A., Post, A., and Faloona, I. C.: Observing
entrainment mixing, photochemical ozone production, and regional methane
emissions by aircraft using a simple mixed-layer framework, Atmospheric
Chemistry and Physics, 16, 15433–15450, https://doi.org/10.5194/acp-16-15433-2016, 2016.
Urbanski, S. P., Hao, W. M., and Baker, S.: Chemical Composition of Wildland
Fire Emissions, in: Wildland Fires and Air Pollution, edited by:
Bytnerowicz, A., Arbaugh, M. J., Riebau, A. R., and Andersen, C.,
Developments in Environmental Science, Elsevier Science Bv, Amsterdam,
79–107, 2009.
Volz-Thomas, A., Patz, H. W., Houben, N., Konrad, S., Mihelcic, D., Klupfel,
T., and Perner, D.: Inorganic trace gases and peroxy radicals during BERLIOZ
at Pabstthum: An investigation of the photostationary state of NOx and O3,
J. Geophys. Res.-Atmos., 108, 8248, https://doi.org/10.1029/2001jd001255,
2003.
Warner, J. and Telford, J. W.: A check of aircraft measurements of vertical
heat flux, J. Atmos. Sci., 22, 463–465, https://doi.org/10.1175/1520-0469(1965)022<0463:acoamo>2.0.co;2, 1965.
Watson, J. G., Chow, J. C., Bowen, J. L., Lowenthal, D. H., Hering, S.,
Ouchida, P., and Oslund, W.: Air quality measurements from the Fresno
Supersite, J. Air Waste Manage., 50,
1321–1334, https://doi.org/10.1080/10473289.2000.10464184, 2000.
Wheeler, N. J. M., Craig, K. J., and Reid, S. B.: An Investigation of Aloft
Model Performance for Two Episodes During the 2000 Central California Ozone
Study, in: Air Pollution Modeling and Its Application Xx, edited by: Steyn,
D. G. and Rao, S. T., NATO Science for Peace and Security Series B-Physics
and Biophysics, Springer, Dordrecht, 603-607, 2010.
Worldview: Explore Your Dynamic Planet, available at: https://worldview.earthdata.nasa.gov/, last access: 10 October 2018.
Short summary
We flew a small single-engine instrumented aircraft in a large valley of California to study the factors that determine air pollutant levels in a region of the US that faces serious air quality challenges. After carefully accounting for atmospheric mixing, we found that agriculture is likely a significant and currently underestimated source of nitrogen oxide, a precursor to both ozone and particulate matter pollution and methane, a potent greenhouse gas.
We flew a small single-engine instrumented aircraft in a large valley of California to study the...
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