Article
Meteorology & Atmospheric Sciences
Yanlin Guo, Shanshan Wang, Jian Zhu, Ruifeng Zhang, Song Gao, Alfonso Saiz-Lopez, Bin Zhou
Summary: This study investigated the mixing ratios of HCHO and CHOCHO in the urban area of Shanghai during summertime in 2018 using the active DOAS method, finding average levels of 3.31+/-1.43 ppbv and 0.164+/-0.073 ppbv, respectively. The research indicated that daytime photochemical processes are the dominant formation pathway for these trace gases, with the RGF ratio influenced by temperature and NO2 levels.
ATMOSPHERIC RESEARCH
(2021)
Article
Engineering, Environmental
Beth S. Nelson, Daniel J. Bryant, Mohammed S. Alam, Roberto Sommariva, William J. Bloss, Mike J. Newland, Will S. Drysdale, Adam R. Vaughan, W. Joe F. Acton, C. Nicholas Hewitt, Leigh R. Crilley, Stefan J. Swift, Pete M. Edwards, Alastair C. Lewis, Ben Langford, Eiko Nemitz, Ranu Shivani, Ranu Gadi, Bhola R. Gurjar, Dwayne E. Heard, Lisa K. Whalley, Uelkeu A. Sahin, David C. S. Beddows, James R. Hopkins, James D. Lee, Andrew R. Rickard, Jacqueline F. Hamilton
Summary: Delhi, India, experiences periods of very poor air quality, and this study investigates the chemical production of secondary pollutants in this highly polluted area. The authors found extremely high nighttime concentrations of NOx and VOCs, with low concentrations of oxidants and high nighttime NO concentrations. This leads to an atypical NO3 diel profile and a shift in peak O3 concentrations compared to the premonsoon period. The authors suggest that urban air quality management should consider the impacts of nighttime emission sources in the postmonsoon period.
ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS
(2023)
Article
Environmental Sciences
Lisa K. Whalley, Eloise J. Slater, Robert Woodward-Massey, Chunxiang Ye, James D. Lee, Freya Squires, James R. Hopkins, Rachel E. Dunmore, Marvin Shaw, Jacqueline F. Hamilton, Alastair C. Lewis, Archit Mehra, Stephen D. Worrall, Asan Bacak, Thomas J. Bannan, Hugh Coe, Carl J. Percival, Bin Ouyang, Roderic L. Jones, Leigh R. Crilley, Louisa J. Kramer, William J. Bloss, Tuan Vu, Simone Kotthaus, Sue Grimmond, Yele Sun, Weiqi Xu, Siyao Yue, Lujie Ren, W. Joe F. Acton, C. Nicholas Hewitt, Xinming Wang, Pingqing Fu, Dwayne E. Heard
Summary: Measurements of various radicals were taken during the AIRPRO campaign in central Beijing in the summer of 2017, showing elevated concentrations. OH reactivity and radical budgets were found to be sensitive to NO concentrations, with potential missing sources and sinks of OH and RO2 under certain conditions. The modeling results indicate the need for better understanding of RO2 species and their reactions to accurately simulate ozone production in VOC-rich environments like Beijing.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2021)
Review
Environmental Sciences
Zhujun Yu, Ying Li
Summary: Volatile organic compounds (VOCs) are crucial in global atmospheric chemistry, with marine VOC distribution and their role still unclear, necessitating further research.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Yong Cheng, Xiao-Feng Huang, Yan Peng, Meng-Xue Tang, Bo Zhu, Shi-Yong Xia, Ling-Yan He
Summary: In this study, a novel method called positive matrix factorization-SHapley Additive explanation (PMF-SHAP) was proposed to evaluate the impact of emission sources on ozone formation and quantify the main sources of ozone pollution. The results showed that ozone formation in Shenzhen was more affected by volatile organic compounds, with vehicle emission sources possibly having the greatest impact.
ENVIRONMENTAL POLLUTION
(2023)
Article
Engineering, Environmental
Janaina P. Nascimento, Henrique M. J. Barbosa, Alessandro L. Banducci, Luciana V. Rizzo, Angel Liduvino Vara-Vela, Bruno B. Meller, Helber Gomes, Andre Cezar, Marco A. Franco, Milena Ponczek, Stefan Wolff, Megan M. Bela, Paulo Artaxo
Summary: In the Amazon rainforest, anthropogenic atmospheric emissions interact with biogenic emissions and result in high concentrations of ozone and secondary organic aerosols. These high concentrations affect a large primary forested area and atmospheric dynamics and photochemistry play a key role in their production.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Environmental Sciences
Jinli Xu, Huifan Deng, Yiqun Wang, Pan Li, Jianqiang Zeng, Hongwei Pang, Xin Xu, Xue Li, Yan Yang, Sasho Gligorovski
Summary: Human daily activities such as cooking and cleaning can affect indoor air quality by emitting volatile organic compounds (VOCs) and forming secondary compounds through reactions with ozone (O3) and hydroxyl radicals (OH). However, our understanding of the formation processes of secondary VOCs is still limited. In this study, we measured the primary VOCs emitted by a commercial floor-cleaning detergent and the secondary compounds formed by the reaction of O3 with the detergent using high-resolution mass spectrometry. We also developed reaction mechanisms to describe the formation of these secondary VOCs.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Lingyu Li, Jing Cao, Yufang Hao
Summary: China experienced severe ozone pollution from 2014 to 2020, with ozone exposure increasing annually by 1.738 ppm-hr with the W126 index. The MEGAN3.1 model was used to estimate China's biogenic volatile organic compound (BVOC) emissions and their response to ozone pollution. The results showed that China's BVOC emissions in 2020 were 23.26 Tg, 1.7% higher when considering the effects of ozone stress. Different types of BVOC emissions varied in their response to ozone pollution, with changes ranging from -1.0% to 15.5%.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
Xiao-Feng Huang, Li-Ming Cao, Xu-Dong Tian, Qiao Zhu, Eri Saikawa, Li-Liang Lin, Yong Cheng, Ling-Yan He, Min Hu, Yuan-Hang Zhang, Ke-Ding Lu, Yu-Han Liu, Kaspar Daellenbach, Jay G. Slowik, Qian Tang, Qiao-Li Zou, Xin Sun, Bing-Ye Xu, Lan Jiang, Ye-Min Shen, Nga Lee Ng, Andre S. H. Prevot
Summary: The COVID-19 lockdown led to reductions in secondary aerosol components in eastern China due to decreases in precursor emissions, but insufficient VOC reduction limited further decreases in aerosols; areas with decreased Ox during the lockdown experienced greater PM2.5 decreases, indicating the importance of VOC control in future policies to mitigate winter haze more efficiently.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Environmental Sciences
Alfred W. Mayhew, Peter M. Edwards, Jaqueline F. Hamilton
Summary: This study presents a modelling approach to assess the impacts of changes in NOx and O-3 concentrations on organonitrates produced from isoprene oxidation. Different formation pathways of isoprene organonitrates show different responses to O-3 and NOx concentrations. The study also reveals complex and nonlinear behavior of total organonitrates, which has important implications for understanding the changes in organonitrate concentrations under efforts to reduce NOx and O-3 concentrations.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Meteorology & Atmospheric Sciences
Rafaela Squizzato, Thiago Nogueira, Leila D. Martins, Jorge A. Martins, Rosana Astolfo, Carolyne Bueno Machado, Maria de Fatima Andrade, Edmilson Dias de Freitas
Summary: The majority of the global population lives in rural areas or small to medium-sized cities, all of which are affected by distant air pollution sources. In urban centres in Brazil, primary pollutant emissions have decreased due to government actions, but surface ozone levels have increased, especially in areas impacted by biofuels production. The metropolitan area of Sao Paulo (MASP) is the main source of O-3, accounting for up to 80% of O-3 concentrations in communities over 200km away.
NPJ CLIMATE AND ATMOSPHERIC SCIENCE
(2021)
Article
Environmental Sciences
Shurui Sun, Wenbin Liu, Weisheng Guan, Shuai Zhu, Jing Jia, Xiaolin Wu, Rongrong Lei, Tianqi Jia, Yunchen He
Summary: This study investigated VOC concentrations in flue gas samples from coal-fired power plants and industrial boilers. It found that SCR systems and ESP can synergistically remove VOCs, while WFGD affects different VOCs in varying ways. Wet electrostatic precipitators (WESP) were found to increase VOC emissions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Xufei Liu, Hai Guo, Lewei Zeng, Xiaopu Lyu, Yu Wang, Yangzong Zeren, Jin Yang, Luyao Zhang, Shizhen Zhao, Jun Li, Gan Zhang
Summary: The study investigated photochemical ozone pollution in five megacities in China during the summer of 2018, finding that meteorological conditions significantly influenced local O3 formation. Beijing had the highest O3 levels, while Shanghai experienced the lightest pollution due to frequent precipitation caused by typhoons. Additionally, VOCs primarily controlled O3 formation in most cities, with Lanzhou being co-limited by VOCs and nitrogen oxides.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Ming Wang, Sihua Lu, Min Shao, Limin Zeng, Jun Zheng, Fangjian Xie, Haotian Lin, Kun Hu, Xingdong Lu
Summary: During the COVID-19 lockdown in China from January to February 2020, restrictive measures were implemented to control the rapid spread of the virus. Research has shown that the lockdown had a significant impact on the concentrations and sources of volatile organic compounds (VOCs) in the atmosphere, leading to changes in VOCs levels and chemical compositions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Meteorology & Atmospheric Sciences
S. Archer-Nicholls, N. L. Abraham, Y. M. Shin, J. Weber, M. R. Russo, D. Lowe, S. R. Utembe, F. M. O'Connor, B. Kerridge, B. Latter, R. Siddans, M. Jenkin, O. Wild, A. T. Archibald
Summary: The new CRI-Strat mechanism is more complex than the existing StratTrop mechanism but only 75% more computationally expensive. It affects ozone production and loss differently compared to StratTrop and also impacts the generation of carbon monoxide and nitrogen oxides.
JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS
(2021)
Article
Green & Sustainable Science & Technology
Kangwei Li, Jiandong Shen, Xin Zhang, Linghong Chen, Stephen White, Mingming Yan, Lixia Han, Wen Yang, Xinhua Wang, Merched Azzi
JOURNAL OF CLEANER PRODUCTION
(2020)
Article
Environmental Sciences
Chunmei Geng, Jing Wang, Baohui Yin, Ruojie Zhao, Peng Li, Wen Yang, Zhimei Xiao, Shijie Li, Kangwei Li, Zhipeng Bai
JOURNAL OF ENVIRONMENTAL SCIENCES
(2020)
Article
Engineering, Environmental
Kangwei Li, Stephen White, Bin Zhao, Chunmei Geng, Brendan Halliburton, Zhibin Wang, Yanyun Zhao, Hai Yu, Wen Yang, Zhipeng Bai, Merched Azzi
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2020)
Article
Geosciences, Multidisciplinary
Xinke Wang, Rachel Gemayel, Vahe J. Baboomian, Kangwei Li, Antoinette Boreave, Clement Dubois, Sophie Tomaz, Sebastien Perrier, Sergey A. Nizkorodov, Christian George
Summary: The study showed that in the photosensitizing process of SOA, the addition of d-limonene and beta-pinene gases can increase the size of aerosol particles, and photosensitized production of sulfate can occur. The dark and photochemical pathways exhibit different trends with RH, revealing different contributions from bulk and surface chemistry.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Environmental Sciences
Ruojie Zhao, Baohui Yin, Nan Zhang, Jing Wang, Chunmei Geng, Xinhua Wang, Bin Han, Kangwei Li, Peng Li, Hao Yu, Wen Yang, Zhipeng Bai
Summary: Aircraft-based measurements were conducted to investigate the spatial and vertical distribution of atmospheric pollutants over the Beijing-Tianjin-Hebei region. The results showed high concentrations of primary gaseous pollutants in urban areas, with high ozone values appearing further from the city. The study highlights the importance of considering both horizontal and vertical transport effects in future research on chemical transport models in the region.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Bin Han, Jia Xu, Yujuan Zhang, Penghui Li, Kangwei Li, Nan Zhang, Jinbao Han, Shuang Gao, Xinhua Wang, Chunmei Geng, Wen Yang, Liwen Zhang, Zhipeng Bai
Summary: This study found that personal exposure to certain PM2.5 constituents and specific sources may increase systemic inflammation in older adults. These findings help explain the cardiopulmonary effects of specific particulate chemical constituents of urban air pollution.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Meteorology & Atmospheric Sciences
Kangwei Li, Xin Zhang, Bin Zhao, William J. Bloss, Chao Lin, Stephen White, Hai Yu, Linghong Chen, Chunmei Geng, Wen Yang, Merched Azzi, Christian George, Zhipeng Bai
Summary: This study demonstrates that isoprene can suppress the formation of secondary organic aerosols (SOA) from the photo-oxidation of anthropogenic aromatics. The presence of isoprene reduces the consumption of parent aromatics, resulting in decreased SOA formation. However, changes in the oxidation state and chemical composition of SOA are observed following the addition of isoprene.
NPJ CLIMATE AND ATMOSPHERIC SCIENCE
(2022)
Article
Environmental Sciences
Chunmei Geng, Shijie Li, Baohui Yin, Chao Gu, Yingying Liu, Liming Li, Kangwei Li, Yujie Zhang, Merched Azzi, Hong Li, Xinhua Wang, Wen Yang, Zhipeng Bai
Summary: This study measured and analyzed atmospheric carbonyl compounds in the Tazhong desert in Xinjiang, China. The results showed relatively low concentrations, but with contributions from local primary and secondary sources. The data obtained can help improve the estimation of sources of carbonyls at the regional scale.
Article
Environmental Sciences
Yong Guo, Kangwei Li, Bin Zhao, Jiandong Shen, William J. Bloss, Merched Azzi, Yinping Zhang
Summary: This study used machine learning techniques to analyze the trends of air pollutants in 12 Chinese mega-cities from 2013 to 2020, finding that the concentrations of all pollutants except O-3 showed a decline, while O-3 concentrations increased. The effectiveness of the clean air actions was evaluated by removing the meteorological influence, and it was found that meteorology can have both positive and negative impacts on pollutant concentrations depending on the type of pollutants, locations, and time periods.
Article
Geosciences, Multidisciplinary
Xinke Wang, Yue Zhou, Kangwei Li, Wei Pu, Xin Wang, Christian George
Summary: 28 snowpack samples were collected in northern Xinjiang, China in January 2018. The study focused on investigating the production rate of gaseous nitrous acid (HONO) in liquid snowmelt samples, and found that the rate was influenced by the presence of complex organic compounds and other photochemical HONO sources. The pH of the snowmelt samples was also found to be closely correlated with the production rate of HONO, with lower pH values in rural/remote areas compared to urban/industrial sites, indicating the influence of anthropogenic activities.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Environmental Sciences
Liming Li, Zhensen Zheng, Bo Xu, Xinhua Wang, Zhipeng Bai, Wen Yang, Chunmei Geng, Kangwei Li
Summary: Oil exploitation releases volatile organic compounds (VOCs), which contribute to ozone (O3) and secondary organic aerosols (SOA) formation. A field campaign in Shandong province, China, evaluated the impact of oil exploitation on tropospheric O3 formation. The results showed that C3-C5 alkanes, C2-C5 alkenes, and C7-C9 aromatics were the most sensitive VOC species to O3 formation. Reducing anthropogenic VOC and NOx emissions at a ratio of 1:3 was found to be an effective strategy for mitigating local O3 pollution.
ATMOSPHERIC ENVIRONMENT
(2023)
Article
Multidisciplinary Sciences
Kangwei Li, Yunlong Guo, Sergey A. Nizkorodov, Yinon Rudich, Maria Angelaki, Xinke Wang, Taicheng An, Sebastien Perrier, Christian George
Summary: Hydroxyl radicals (OH) play a crucial role as oxidants in atmospheric chemistry, and their aqueous sources have been mainly attributed to known bulk processes or interfacial chemistry driven by O3 and NO3 radicals. This study provides experimental evidence that OH radicals can be spontaneously produced at the air-water interface of aqueous droplets, even in the absence of known precursors, possibly due to the strong electric field formed at such interfaces. The measured OH production rates in atmospherically relevant droplets are comparable to or higher than those from known bulk sources, particularly in the dark. As aqueous droplets are widespread in the troposphere, this interfacial source of OH radicals is expected to have significant impacts on atmospheric multiphase oxidation chemistry, with implications for air quality, climate, and health.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Engineering, Environmental
Yunlong Guo, Kangwei Li, Sebastien Perrier, Taicheng An, D. James Donaldson, Christian George
Summary: Experimental evidence shows that I and I2 can be spontaneously generated at the air-water interface of iodide-containing droplets without the need for any catalysts, oxidants, or irradiation. This interfacial chemistry process, possibly initiated by the intrinsic electric field present at the interface, could be significant in various contexts, including atmospheric aerosols.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Environmental Sciences
Zhensen Zheng, Kangwei Li, Bo Xu, Jianping Dou, Liming Li, Guotao Zhang, Shijie Li, Chunmei Geng, Wen Yang, Merched Azzi, Zhipeng Bai
Summary: In this study, researchers developed an approach that integrated multiple patterns of timescale to better understand the relationships between ozone and its precursors. Through a 5-month field campaign in northern China, they found that the relative incremental reactivity of major precursor groups changed consistently in terms of timescales. The study also highlighted the importance of quantifying different timescales to constraint the photochemical regime, which can provide more accurate guidance for ozone pollution control.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Green & Sustainable Science & Technology
Lars odegaard Bentsen, Narada Dilp Warakagoda, Roy Stenbro, Paal Engelstad
Summary: This study investigates uncertainty modeling in wind power forecasting using different parametric and non-parametric methods. Johnson's SU distribution is found to outperform Gaussian distributions in predicting wind power. This research contributes to the literature by introducing Johnson's SU distribution as a candidate for probabilistic wind forecasting.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Xing Liu, Qiuchen Wang, Yunhao Wen, Long Li, Xinfang Zhang, Yi Wang
Summary: This study analyzes the characteristics of process parameters in three lean gas ethane recovery processes and establishes a prediction and multiobjective optimization model for ethane recovery and system energy consumption. A new method for comparing ethane recovery processes for lean gas is proposed, and the addition of extra coolers improves the ethane recovery. The support vector regression model based on grey wolf optimization demonstrates the highest prediction accuracy, and the multiobjective multiverse optimization algorithm shows the best optimization performance and diversity in the solutions.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Cairong Song, Haidong Yang, Xian-Bing Meng, Pan Yang, Jianyang Cai, Hao Bao, Kangkang Xu
Summary: The paper proposes a novel deep learning-based prediction framework, aTCN-LSTM, for accurate cooling load predictions. The framework utilizes a gate-controlled multi-head temporal convolutional network and a sparse probabilistic self-attention mechanism with a bidirectional long short-term memory network to capture both temporal and long-term dependencies in the cooling load sequences. Experimental results demonstrate the effectiveness and superiority of the proposed method, which can serve as an effective guide for HVAC chiller scheduling and demand management initiatives.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Zhe Chen, Xiaojing Li, Xianli Xia, Jizhou Zhang
Summary: This study uses survey data from the Loess Plateau in China to evaluate the impact of social interaction on the adoption of soil and water conservation (SWC) technology by farmers. The study finds that social interaction increases the likelihood of farmers adopting SWC, and internet use moderates this effect. The positive impact of social interaction on SWC adoption is more pronounced for farmers in larger villages and those who join cooperative societies.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Chenghua Zhang, Yunfei Yan, Kaiming Shen, Zongguo Xue, Jingxiang You, Yonghong Wu, Ziqiang He
Summary: This paper reports a novel method that significantly improves combustion performance, including heat transfer enhancement under steady-state conditions and adaptive stable flame regulation under velocity sudden increase.
JOURNAL OF CLEANER PRODUCTION
(2024)