Article
Environmental Sciences
Jie Li, Zhiwei Han, Yele Sun, Jiawei Li, Lin Liang
Summary: A regional air quality model system was developed to investigate the chemical pathways for secondary organic aerosol (SOA) formation in the Beijing-Tianjin-Hebei region in winter. The model showed significant improvement in simulating SOA by including primary S/IVOCs and aqueous reactions, with different volatile organic compounds contributing variably to SOA formation.
ATMOSPHERIC ENVIRONMENT
(2021)
Article
Environmental Sciences
Jack C. Hensley, Adam W. Birdsall, Gregory Valtierra, Joshua L. Cox, Frank N. Keutsch
Summary: This study identified the pH-dependent mechanism of butenedial reactions in aqueous solutions with NHx, compared to alpha-dicarbonyls. Butenedial was found to have significant differences in chemical behavior compared to other dicarbonyls, despite sharing similar functionalities.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2021)
Article
Engineering, Environmental
Ruifeng Zhang, Masao Gen, Zhancong Liang, Yong Jie Li, Chak Keung Chan
Summary: This study examines the reactions of glyoxal during photooxidation and BrC formation and finds that nitrate photolysis and photosensitization can significantly enhance the decay rates of glyoxal. It also observes the formation of a persistent organic phase, which suggests its potential contribution to SOA formation in ambient fine particles.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Environmental
Ruifeng Zhang, Masao Gen, Zhancong Liang, Yong Jie Li, Chak Keung Chan
Summary: The study investigates the reactions of glyoxal during photooxidation and BrC formation in premixed NH4NO3 + Glyoxal droplets. It finds that nitrate photolysis and photosensitization can enhance the decay rates of glyoxal significantly, and a new organic phase was formed in irradiated NH4NO3 + Glyoxal droplets, suggesting potential contributions to SOA formation in ambient fine particles.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Environmental Sciences
Yujia Chen, Wenjing Su, Chengzhi Xing, Hao Yin, Hua Lin, Chengxin Zhang, Haoran Liu, Qihou Hu, Cheng Liu
Summary: This study utilizes high-resolution satellite observations of glyoxal to identify anthropogenic VOC sources, providing important evidence for formulating pollution control policies.
REMOTE SENSING OF ENVIRONMENT
(2022)
Article
Environmental Sciences
Mincong Zhu, Mingqiang Huang, Tingting Lu, Shunyou Cai, Xiaobin Shan, Liusi Sheng, Weixiong Zhao, Xuejun Gu, Weijun Zhang
Summary: Imidazole and its derivatives are identified as the main components in aerosol particles. Real-time detection by VUV-PIMS and offline verification with optical spectrometry confirms the presence of imidazole in aqSOA particles formed from the reaction of methylglyoxal and ammonium sulphate. The study also determines the principal products of the reaction and discusses the possible reaction mechanism.
ATMOSPHERIC POLLUTION RESEARCH
(2022)
Article
Engineering, Environmental
Xiufeng Lian, Guohua Zhang, Yuxiang Yang, Qinhao Lin, Yuzhen Fu, Feng Jiang, Long Peng, Xiaodong Hu, Duohong Chen, Xinming Wang, Ping'an Peng, Guoying Sheng, Xinhui Bi
Summary: This study provides ambient evidence of the formation of imidazole through reactions between carbonyls and ammonium/amines at the individual particle level. The results suggest that the presence of internally mixed carbonyls and ammonium/amines significantly enhances the fraction of imidazole in particles, and a higher number fraction of imidazole is observed in cloud residual and interstitial particles compared to cloud-free particles.
ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS
(2021)
Article
Environmental Sciences
Chunqian He, Hao Wang, Daocheng Gong, Shaojun Lv, Gengchen Wu, Ruiwen Wang, Yaqiu Chen, Yaozhou Ding, Yanlei Li, Boguang Wang
Summary: This study measured particle-bound imidazoles and their precursors at a background forest site in southern China, finding a significantly higher concentration of imidazoles than other background sites worldwide, with a majority originating from secondary formation through reactions of dicarbonyls and reduced nitrogen species. The results indicated that secondary formation of imidazoles can be greatly enhanced under high humidity conditions, particularly during fog events.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Stepan Hornik, Jan Sykora, Petra Pokorna, Petr Vodicka, Jaroslav Schwarz, Vladimir Zdimal
Summary: In this study, water-soluble organic compounds in size-resolved summer and winter aerosol samples collected in a Prague suburban area were analyzed using 1H NMR spectroscopy. 73 organic species were identified and classified into 9 chemical classes, with discussions on possible aerosol sources. The study revealed correlations between carbohydrates and trimethylglycine and choline in coarse summer aerosol, as well as similar distribution profiles for compounds associated with biomass burning in winter series.
ATMOSPHERIC ENVIRONMENT
(2021)
Article
Environmental Sciences
Himadri S. Bhowmik, Shubham Naresh, Deepika Bhattu, Neeraj Rastogi, Andre S. H. Prevot, Sachchida N. Tripathi
Summary: The study in the Indo-Gangetic plain found that organic carbon (OC) dominates in the PM2.5 particles during winter, while water-soluble organic carbon (WSOC) increases notably in summer. The high OC/EC ratio during winter and post-monsoon indicates biomass burning as the primary source, while WSOC shows a significant contribution from secondary sources with variations across different sites.
ATMOSPHERIC POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Yuemeng Ji, Qiuju Shi, Xiaohui Ma, Lei Gao, Jiaxin Wang, Yixin Li, Yanpeng Gao, Guiying Li, Renyi Zhang, Taicheng An
Summary: The study elucidates the fundamental kinetics and mechanisms for aqueous-phase oligomerization of glyoxal, including protonation, nucleophilic addition, and deprotonation. These reactions occur under atmospheric conditions and are dominantly driven by electrostatic attraction, with certain rate limitations.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2022)
Article
Agriculture, Multidisciplinary
Wei Jiang, Xiaoyuan Wang, YunJiao Ma, Ming Du, Chao Wu, Xianbing Xu
Summary: This study explores the origin of carbon atoms in 2,3,5-trimethylpyrazine, a commonly found Maillard flavor compound in thermally processed foods. Through model reactions and labeling technology, it is discovered that methylglyoxal, glyoxal, and formaldehyde play a role in the formation of 2,3,5-trimethylpyrazine. The findings provide insights into controlling the formation of flavor compounds and offer new perspectives for future research.
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
(2023)
Article
Chemistry, Physical
Alyssa A. Rodriguez, Michael A. Rafla, Hannah G. Welsh, Elyse A. Pennington, Jason R. Casar, Lelia N. Hawkins, Natalie G. Jimenez, Alexia de Loera, Devoun R. Stewart, Antonio Rojas, Matthew-Khoa Tran, Peng Lin, Alexander Laskin, Paola Formenti, Mathieu Cazaunau, Edouard Pangui, Jean-Francois Doussin, David O. De Haan
Summary: Glycolaldehyde is a water-soluble aldehyde that is commonly found in the atmosphere. It reacts more slowly than other species with ammonium sulfate, methylamine, and glycine. In cloud chamber experiments, it was found that deliquesced glycine and ammonium sulfate particles take up glycolaldehyde and methylamine and form brown carbon at a faster rate than predicted by bulk liquid measurements. This suggests that reactions at air-water interfaces may play a significant role in the formation of brown carbon.
JOURNAL OF PHYSICAL CHEMISTRY A
(2022)
Article
Environmental Sciences
Matic Ivancic, Asta Gregoric, Gasper Lavric, Balint Alfoldy, Irena Jezek, Sina Hasheminassab, Payam Pakbin, Faraz Ahangar, Mohammad Sowlat, Steven Boddeker, Martin Rigler
Summary: In this study, a method for apportioning carbonaceous aerosols (CA) based on high-time-resolution measurements is presented. Two years of CA measurements in California's Los Angeles Basin are analyzed. The study finds that secondary organic aerosols (SOA) contribute more than 50% of CA, with remarkable peaks observed in summer afternoons. Primary emitted CA, consisting of black carbon (BC) and primary organic aerosol (POA), dominate during morning rush hours on winter working days. The study also highlights the different contributions of brown carbon (BrC) to optical absorption at different wavelengths, with the highest contribution observed during wildfire periods.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Chemistry, Physical
Zhenhao Guo, Weina Zhang, Baocong Zhao, Lei Gao, Yongpeng Ji, Yuemeng Ji
Summary: The browning mechanism of glyoxal and methylglyoxal with methylamine and ammonia on kaolinite surface was investigated using density functional theory. The results show that glyoxal and methylglyoxal form a mixture with kaolinite through hydrogen bonding. The browning reaction is initiated by photooxidation, and imine and diimine are formed via reaction with methylamine and ammonia on kaolinite surface. This study highlights the importance of photooxidation in the browning reaction of small alpha-dicarbonyl compounds on mineral surfaces, providing new insights into Brown Carbon formation during dust storms.
CHEMICAL PHYSICS LETTERS
(2023)
Article
Meteorology & Atmospheric Sciences
Wenxin Fan, Yi Liu, Adrian Chappell, Li Dong, Rongrong Xu, Marie Ekstrom, Tzung-May Fu, Zhenzhong Zeng
Summary: Global reanalysis products are important tools for studying past meteorological changes and wind energy resource evaluations. Research found that while ERA5 is closest to observations, substantial discrepancies exist between observed and simulated wind speeds. No reanalysis product fully captured the global observed trends, though some showed regional agreements.
JOURNAL OF APPLIED METEOROLOGY AND CLIMATOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Wenfu Sun, Lei Zhu, Isabelle De Smedt, Bin Bai, Dongchuan Pu, Yuyang Chen, Lei Shu, Dakang Wang, Tzung-May Fu, Xiaofei Wang, Xin Yang
Summary: This study utilized TROPOMI observations to analyze the changes in HCHO columns during the early stage of the COVID-19 pandemic in 2020, finding that factors such as decreased NOx emissions and reduced NMVOC emissions due to lockdown influenced the changes in HCHO columns in various regions. The changes in HCHO columns in Australia, Northeastern Myanmar, Central Africa, and Central America were consistent with fire activities.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Engineering, Environmental
Ruifeng Zhang, Masao Gen, Tzung-May Fu, Chak K. Chan
Summary: The study indicates that particulate nitrate photolysis can generate oxidants in aqueous droplets, promoting the formation of secondary organic aerosol (SOA). However, the oxidation of high concentrations of glyoxal by OH radicals produced from nitrate photolysis may not significantly contribute to SOA formation, as formic acid is found to be the main oxidation product. This new insight into the production of formic acid/formate and the sink of glyoxal in the atmosphere may help bridge the gap between model predictions and field measurements.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Engineering, Environmental
Xiaolin Wang, Tzung-May Fu, Lin Zhang, Hansen Cao, Qiang Zhang, Hanchen Ma, Lu Shen, Mathew J. Evans, Peter D. Ivatt, Xiao Lu, Youfan Chen, Lijuan Zhang, Xu Feng, Xin Yang, Lei Zhu, Daven K. Henze
Summary: The study highlights the sensitivity of ozone pollution in Beijing-Tianjin-Hebei to both local emissions and precursors from the southern provinces, particularly on heavily polluted days. By reducing NOx emissions from industrial processes and transportation, as well as harmful substances from industrial processes and paint use, effective mitigation of ozone pollution in the region can be achieved.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Engineering, Environmental
Yumin Li, Tzung-May Fu, Jian Zhen Yu, Xu Feng, Lijuan Zhang, Jing Chen, Suresh Kumar Reddy Boreddy, Kimitaka Kawamura, Pingqing Fu, Xin Yang, Lei Zhu, Zhenzhong Zeng
Summary: This study developed the first global simulation of atmospheric levoglucosan, considering its chemical degradation in the atmosphere. The research found that aqueous-phase oxidation, heterogeneous oxidation, gas-phase oxidation, as well as dry and wet deposition are the main sinks of atmospheric levoglucosan. Statistical parametrizations were developed using model results to improve the accuracy of quantitative aerosol source apportionment using levoglucosan measurements.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Engineering, Environmental
Jinghao Zhai, Xin Yang, Ling Li, Bin Bai, Pengfei Liu, Yuanlong Huang, Tzung-May Fu, Lei Zhu, Zhenzhong Zeng, Shu Tao, Xiaohui Lu, Xingnan Ye, Xiaofei Wang, Lin Wang, Jianmin Chen
Summary: The study investigates the absorption enhancement of atmospheric black carbon (BC) through the lensing effect when mixed with non-BC/coating material. The results from field observations show both large and minor absorption enhancement factors for different BC-containing particle populations with large bulk non-BC-to-BC mass ratios. The study highlights the importance of considering mixing-state heterogeneity in optical models to accurately estimate the aerosol radiation effect of BC.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Environmental
Hansen Cao, Daven K. Henze, Karen Cady-Pereira, Brian C. McDonald, Colin Harkins, Kang Sun, Kevin W. Bowman, Tzung-May Fu, Muhammad O. Nawaz
Summary: In situ measurements have suggested that vehicle emissions may be a major source of NH3 in urban areas, surpassing agricultural sources. A study conducted during the COVID-19 lockdowns used satellite data to constrain vehicle NH3 emissions in western Los Angeles, finding that they make up 60-95% of total NH3 emissions, significantly higher than previous estimates. This highlights the importance of considering and controlling vehicle NH3 emissions, which have been overlooked in the past.
ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS
(2022)
Article
Engineering, Environmental
Xin Long, Tzung-May Fu, Xin Yang, Yuanyuan Tang, Yan Zheng, Lei Zhu, Huizhong Shen, Jianhuai Ye, Chen Wang, Teng Wang, Baojie Li
Summary: This study developed a regional atmospheric transport model for microplastics, taking into account the aerodynamics of microplastics based on their size and shape. By comparing the model simulations with observations, the study estimated the emissions and atmospheric transport flux of microplastics in Asia and the adjacent oceans. The results showed that atmospheric transport plays an important role in the source-to-sink relationship of global microplastic pollution.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Xiaolin Wang, Tzung-May Fu, Lin Zhang, Xiao Lu, Xiong Liu, Teerachai Amnuaylojaroen, Mohd Talib Latif, Yaping Ma, Lijuan Zhang, Xu Feng, Lei Zhu, Huizhong Shen, Xin Yang
Summary: By combining observations and simulations, we assessed the trends of tropospheric ozone over Southeast Asia from 2005 to 2016. The surface ozone levels in Peninsular Southeast Asia showed rapid increases, primarily driven by local emissions, while the Maritime Continents experienced relatively slower increases. It is necessary to quantify Southeast Asian emissions more accurately to improve air quality management.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geosciences, Multidisciplinary
Jinghao Zhai, Xin Yang, Ling Li, Xingnan Ye, Jianmin Chen, Tzung-May Fu, Lei Zhu, Huizhong Shen, Jianhuai Ye, Chen Wang, Shu Tao
Summary: The addition of coating to black carbon enhances its absorption, with secondary inorganic species playing a critical role in the coating materials to enhance the lensing effect.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geosciences, Multidisciplinary
Aoxing Zhang, Tzung-May Fu, Xu Feng, Jianfeng Guo, Chanfang Liu, Jiongkai Chen, Jiajia Mo, Xiao Zhang, Xiaolin Wang, Wenlu Wu, Yue Hou, Honglong Yang, Chao Lu
Summary: We developed an efficient 2-D convolutional neural network-surface ozone ensemble forecast system using 2-D convolutional neural network and weather ensemble forecasts. This system demonstrated comparable performance to current operating forecast systems and met the air quality level forecast accuracies required by the Chinese authorities up to 144-hr lead time. Uncertainties in weather forecasts contributed 38%-54% of the ozone forecast errors at 24-hr lead time and beyond. The 2DCNN-SOEF enabled an ozone exceedance probability metric, which better represented the risks of air pollution given the range of possible weather outcomes. Our ensemble forecast framework can be extended to operationally forecast other meteorology-dependent environmental risks globally, making it a valuable tool for environmental management.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Engineering, Environmental
Xu Feng, Yaping Ma, Haipeng Lin, Tzung-May Fu, Yan Zhang, Xiaolin Wang, Aoxing Zhang, Yupeng Yuan, Zimin Han, Jingbo Mao, Dakang Wang, Lei Zhu, Yujie Wu, Ying Li, Xin Yang
Summary: In early 2020, two unique events - the decline of ship activities due to COVID-19 and the global enforcement of low-sulfur fuel oil for ships - perturbed ship emissions of pollutants around Southern China, providing insights into their impacts on regional air quality. The decline in ship emissions led to decreases in NOx, SO2, and primary PM2.5 over Southern China, with the most significant reductions occurring in coastal waters and inland waterways for NOx and outside the Chinese Domestic Emission Control Area for SO2 and primary PM2.5. Despite the decrease in surface NO2 levels, there was an increase in surface ozone levels. Ship emissions were found to contribute significantly to surface NO2 concentrations over Guangdong in winter. Therefore, future abatements of ship emissions should be implemented synergistically with reductions of land-borne anthropogenic emissions to effectively alleviate regional ozone pollution.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Xiaotian Xu, Xu Feng, Haipeng Lin, Peng Zhang, Shaojian Huang, Zhengcheng Song, Yiming Peng, Tzung-May Fu, Yanxu Zhang
Summary: Based on model simulation and data comparison, this study reveals the existence of high-mercury wet deposition in the southeastern United States. The research also shows that the majority of mercury wet deposition occurs at higher altitudes and is caused by convective precipitation.
GEOSCIENTIFIC MODEL DEVELOPMENT
(2022)
Article
Geosciences, Multidisciplinary
Xu Feng, Haipeng Lin, Tzung-May Fu, Melissa P. Sulprizio, Jiawei Zhuang, Daniel J. Jacob, Heng Tian, Yaping Ma, Lijuan Zhang, Xiaolin Wang, Qi Chen, Zhiwei Han
Summary: WRF-GC v2.0 is an online two-way coupling of the WRF meteorological model and the GEOS-Chem model, performing meteorological and chemical calculations on the same 3-D grid system for efficient and scalable simulations of regional meteorology and air quality.
GEOSCIENTIFIC MODEL DEVELOPMENT
(2021)
Article
Environmental Sciences
Shijie Hu, Dashan Wang, Jie Wu, Lihong Zhou, Xu Feng, Tzung-May Fu, Xin Yang, Alan D. Ziegler, Zhenzhong Zeng
Summary: The reduction in aerosol levels during the COVID-19 pandemic led to significantly higher DTR values in China compared to climatological averages, a phenomenon unprecedented in the 21st century.
ENVIRONMENTAL SCIENCE-ATMOSPHERES
(2021)
Article
Environmental Sciences
Muhammad Waqas, Majid Nazeer, Man Sing Wong, Wu Shaolin, Li Hon, Joon Heo
Summary: The socio-economic restriction measures implemented in the United States have significantly reduced nitrogen dioxide (NO2) emissions. The study highlights the impact of factors such as human mobility, population density, income, climate, and stationary sources on the reduction of NO2 at different stations. The research emphasizes the scientific impacts of the NO2 reduction and income inequality revealed by the pandemic on air quality and health disparities.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Guorui Zhi, Jinhong Du, Aizhong Chen, Wenjing Jin, Na Ying, Zhihui Huang, Peng Xu, Di Wang, Jinghua Ma, Yuzhe Zhang, Jiabao Qu, Hao Zhang, Li Yang, Zhanyun Ma, Yanjun Ren, Hongyan Dang, Jianglong Cui, Pengchuan Lin, Zhuoshi He, Jinmin Zhao, Shuo Qi, Weiqi Zhang, Wenjuan Zhao, Yingxin Li, Qian Liu, Chen Zhao, Yi Tang, Peng Wei, Jingxu Wang, Zhen Song, Yao Kong, Xiangzhe Zhu, Yi Shen, Tianning Zhang, Yangxi Chu, Xinmin Zhang, Jiafeng Fu, Qingxian Gao, Jingnan Hu, Zhigang Xue
Summary: An comprehensive emission inventory for China in 2019, which includes both air pollutants and greenhouse gases, was developed in this study. The inventory utilizes existing frameworks and data to provide comparable emissions data and demonstrates the relationship between emissions and economic development.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
I-Ting Ku, Yong Zhou, Arsineh Hecobian, Katherine Benedict, Brent Buck, Emily Lachenmayer, Bryan Terry, Morgan Frazier, Jie Zhang, Da Pan, Lena Low, Amy Sullivan, Jeffrey L. Collett Jr
Summary: Unconventional oil and natural gas development (UOGD) in the United States has expanded rapidly in recent decades, raising concerns about its impact on air quality. This study conducted extensive air monitoring during the development of several large well pads in Broomfield, Colorado, providing a unique opportunity to examine changes in local air toxics and VOC concentrations during well drilling and completions and production. The study identified significant increases in VOC concentrations during drilling operations, highlighting the importance of emissions from synthetic drilling mud. The findings suggest opportunities to mitigate emissions during UOGD operations.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Puji Lestari, Akbar R. Tasrifani, Wiranda I. Suri, Martin J. Wooster, Mark J. Grosvenor, Yusuke Fujii, Vissia Ardiyani, Elisa Carboni, Gareth Thomas
Summary: This study developed field emission factors for various pollutants in peatland fires and estimated the total emissions. Gas samples were collected using an analyzer, while particulate samples were collected using air samplers. The study found significant emissions of CO2, CO, PM2.5, carbon aerosols, water-soluble ions, and elements from the fires in Central Kalimantan, Indonesia in 2019.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Ligang Li, Yuyu Chen, Lu Fan, Dong Sun, Hu He, Yongshou Dai, Yong Wan, Fangfang Chen
Summary: A high-precision retrieval method based on a deep convolutional neural network and satellite remote sensing data is proposed to obtain accurate methane vertical profiles.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Hyung Joo Lee, Toshihiro Kuwayama, Michael Fitzgibbon
Summary: This study investigated the changes in nitrogen dioxide (NO2) air pollution levels and their disparities in California, U.S. during the pandemic of coronavirus disease 2019 (COVID-19). The results showed a decrease in NO2 concentrations, especially in urban and high-traffic areas. However, socially vulnerable populations still experienced higher levels of NO2 exposure. The study suggests that reducing NO2 disparities, particularly racial inequity, can be achieved through continued regulatory actions targeting traffic-related NOx emissions.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Maria Chiara Pietrogrande, Beatrice Biffi, Cristina Colombi, Eleonora Cuccia, Umberto Dal Santo, Luisa Romanato
Summary: This study investigates the chemical composition and oxidative potential of PM10 particles in the Po Valley, Italy, and demonstrates the impact of high levels of atmosphere ammonia. The rural area had significantly higher ammonia concentrations compared to the urban site, resulting in higher levels of secondary inorganic aerosol. Although the SIA components did not contribute significantly to the PM10 oxidative reactivity, they were correlated with the oxidative potential measurements. This suggests that the contribution of SIA to PM oxidative toxicity cannot be ignored.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Natalie Allen, Jan Gacnik, Sarrah M. Dunham-Cheatham, Mae Sexauer Gustin
Summary: Accurate measurement of atmospheric reactive mercury is challenging due to its reactivity and low concentrations. The University of Nevada, Reno Reactive Mercury Active System (RMAS) has been shown to be more accurate than the industry standard, but has limitations including long time resolution and sampling biases. Increasing the sampling flow rate negatively affected RM concentrations, but did not impact the chemical composition of RM captured on membranes.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Chin-Yu Hsu, Wei-Ting Hsu, Ching-Yi Mou, Pei-Yi Wong, Chih-Da Wu, Yu-Cheng Chen
Summary: This study estimated the daily exposure concentrations of PM2.5 for elderly individuals residing in different regions of Taiwan using land use regression with machine learning (LUR_ML) and microenvironmental exposure (ME) models. The accuracy of the models varied across regions, with the ME models exhibiting higher predictions and lower biases. The use of region-specific microenvironmental measurements in the ME model showed potential for accurate prediction of personal PM2.5 exposure.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Xiaohan Si, Kerrie Mengersen, Chuchu Ye, Wenbiao Hu
Summary: This study found that there is an interactive effect between air pollutants and weather factors, which significantly affects influenza transmission. Future research should consider the interactive effects between pollutants and temperature or humidity to evaluate the environment-influenza association.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Luxi Xu, Ruijun Xu, Yunshao Ye, Rui Wang, Jing Wei, Chunxiang Shi, Qiaoxuan Lin, Ziquan Lv, Suli Huang, Qi Tian, Yuewei Liu
Summary: This study aimed to evaluate the impact of ambient air pollution on hospital admissions for angina. The results showed that exposure to ambient particulate matter, sulfur dioxide, nitrogen dioxide, carbon monoxide, and ozone are associated with an increased risk of hospital admissions for angina. The association with nitrogen dioxide exposure was found to be the strongest.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Xinyu Yu, Man Sing Wong, Majid Nazeer, Zhengqiang Li, Coco Yin Tung Kwok
Summary: This study proposes a novel method to address the challenge of missing values in satellite-derived AOD products and creates a comprehensive daily AOD dataset for the Guangdong-Hong Kong-Macao Greater Bay Area. By reconstructing missing values and developing a new model, the derived dataset outperforms existing products and agrees well with ground-based observations. Additionally, the dataset exhibits consistent temporal patterns and more spatial details.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Yidan Zhang, Yifan Xu, Bo Peng, Wu Chen, Xiaoyu Cui, Tianle Zhang, Xi Chen, Yuan Yao, Mingjin Wang, Junyi Liu, Mei Zheng, Tong Zhu
Summary: This study developed a sensitive method to measure the metallic components of atmospheric fine particulate matter (PM2.5) and compared the results with different analysis methods. The concentrations of metallic components in personal PM2.5 samples were found to be significantly different from corresponding fixed-site samples. Personal sampling can reduce exposure misclassifications, and measuring metallic components is useful for exploring health risks and identifying sources of PM2.5.
ATMOSPHERIC ENVIRONMENT
(2024)
Review
Environmental Sciences
Jamie Leonard, Lea Ann El Rassi, Mona Abdul Samad, Samantha Prehn, Sanjay K. Mohanty
Summary: Increasing concentrations of microplastics in the Earth's atmosphere could have adverse effects on ecosystems and human health. The deposition rate of airborne microplastics is influenced by both land use and climate, and a global analysis suggests that climate may have a greater impact on the concentration and deposition rate of microplastics than land use.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Tian Zhou, Xiaowen Zhou, Zining Yang, Carmen Cordoba-Jabonero, Yufei Wang, Zhongwei Huang, Pengbo Da, Qiju Luo, Zhijuan Zhang, Jinsen Shi, Jianrong Bi, Hocine Alikhodja
Summary: This study investigated the long-range transport and effects of North African and Middle Eastern dust in East Asia using lidar observations and model simulations. The results showed that the dust originated from multiple sources and had a long transport time. The vertical distribution of the dust was found to be crucial for assessing its impacts.
ATMOSPHERIC ENVIRONMENT
(2024)
