Article
Environmental Sciences
Jason A. Miech, Levi Stanton, Meiling Gao, Paolo Micalizzi, Joshua Uebelherr, Pierre Herckes, Matthew P. Fraser
Summary: Testing the performance of low-cost air quality sensors using various environmental factors showed discrepancies in two sensors, but these were mitigated through sensor-specific calibration, improving overall accuracy. Stable environmental conditions during sensor deployment benefited calibration performance over time.
Article
Engineering, Environmental
Stephanie R. Schneider, Kristyn Lee, Guadalupe Santos, Jonathan P. D. Abbatt
Summary: As the climate warms, wildfires are increasing in size and frequency, impacting air quality by elevating concentrations of PM2.5, NO2, and CO. This study established an automated method to identify wildfire-influenced periods in urban areas and found that wildfires have a relatively greater impact on pollutants like CO and NO2 due to decreasing urban baseline concentrations over time.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Environmental Sciences
Vasileios N. Matthaios, Daniel Rooney, Roy M. Harrison, Petros Koutrakis, William J. Bloss
Summary: This study measures the NO2 exposure inside vehicles under real-world driving conditions and evaluates the effectiveness of different filters in reducing in-vehicle NO2 levels. The results show that replacing the previous filters with new activated carbon cabin filters can significantly reduce NO2 exposure. However, the removal efficiency of the activated carbon filters decreases over time.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Srijana Lama, Sander Houweling, K. Folkert Boersma, Ilse Aben, Hugo A. C. Denier van der Gon, Maarten C. Krol
Summary: A new method for estimating urban hydroxyl radical (OH) concentrations using TROPOMI observations is proposed, which incorporates the use of the WRF-Chem model and auxiliary input variables for optimization. The results indicate that the NO2/CO ratio observed by TROPOMI can reliably estimate urban OH concentrations.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2022)
Article
Environmental Sciences
Ashley Mills, Stephen Peckham
Summary: The study found that the heuristic method provided by Defra in the UK for estimating the likelihood of NO2 hourly objective exceedance performs poorly and is not sufficient for predicting breaches accurately. Additionally, the sensitivity test revealed that the method is highly sensitive to input data, and there is a weak correlation with medical evidence.
Article
Environmental Sciences
Yurun Wang, Ian C. Faloona, Benjamin Z. Houlton
Summary: This study examines the spatio-temporal patterns of nitrogen dioxide (NO2) concentrations in different land cover types across California from 2009 to 2020. The results show that NO2 concentrations continue to decline in urban areas, but are insignificant or rapidly increasing in rural regions, particularly in remote forests. The study also finds that rising temperatures and decreasing precipitation due to climate change contribute to increased soil NOx emissions, explaining a third of the observed NO2 rise in non-urban regions. Furthermore, the rise in wildfire frequency since the 21st century is attributed to the trends or their absence.
ENVIRONMENTAL RESEARCH LETTERS
(2023)
Article
Geosciences, Multidisciplinary
Steffen Beirle, Christian Borger, Steffen Doerner, Henk Eskes, Vinod Kumar, Adrianus de Laat, Thomas Wagner
Summary: The global catalog of NOx emissions from point sources, based on TROPOMI measurements of tropospheric NO2 for 2018-2019, identifies and quantifies 451 locations, primarily related to power plants. The catalog reveals that the four largest localized NOx emitters are coal combustion plants in South Africa. Despite incompleteness and underestimation of emissions, the catalog has potential for checking and improving emission inventories.
EARTH SYSTEM SCIENCE DATA
(2021)
Article
Environmental Sciences
Anastasia Montgomery, Madeleine I. G. Daepp, Marah Abdin, Pallavi Choudhury, Sara Malvar, Scott Counts, Daniel E. Horton
Summary: High-resolution air quality data products have the potential to quantify inequitable environmental exposures by identifying hotspots. However, different high-resolution data products may identify different hotspots, leading to difficulties in differentiating signal from noise. This study compares NO2 hotspots detected in Chicago using three different high-resolution air quality products and provides insights into dataset discrepancies and potential reasons for inconsistency.
ENVIRONMENTAL RESEARCH LETTERS
(2023)
Article
Multidisciplinary Sciences
Matthew J. Cooper, Randall Martin, Melanie S. Hammer, Pieternel F. Levelt, Pepijn Veefkind, Lok N. Lamsal, Nickolay A. Krotkov, Jeffrey R. Brook, Chris A. McLinden
Summary: Using satellite observations of NO2 column densities, we derived spatially resolved ground-level NO2 concentrations globally and compared them between cities during the COVID-19 lockdowns in 2020 and 2019. The study found that strict lockdown conditions were associated with a 29% ± 3% decrease in average country-level population-weighted NO2 concentrations compared to countries without lockdowns. The decrease in NO2 during COVID-19 lockdowns exceeded year-to-year decreases from emission controls and was comparable to reductions equivalent to 15 ± 4 years globally.
Article
Environmental Sciences
Philipp Schneider, Paul D. Hamer, Arve Kylling, Shobitha Shetty, Kerstin Stebel
Summary: The study evaluated the availability of valid data from the TROPOMI tropospheric nitrogen dioxide product over five urban areas in Norway, revealing distinct spatial patterns of NO2 even in relatively clean environments. However, data availability on a daily level is limited by cloud cover and solar zenith angle, with the fraction of valid retrievals varying seasonally. Despite these challenges, the TROPOMI product shows potential for detailed mapping and monitoring of NO2 pollution in major urban areas in Norway.
Article
Environmental Sciences
Nenghan Wan, Xiaozhen Xiong, Gerard J. Kluitenberg, J. M. Shawn Hutchinson, Robert Aiken, Haidong Zhao, Xiaomao Lin
Summary: The bushfires in Australia in late 2019 and early 2020 were unprecedented in scale and intensity. This study analyzed the NO2 and CO emissions using satellite data and found significant variations in different vegetation types. The findings contribute to understanding the impact of biomass burning on regional air quality and can be applied to other large fires and fossil fuel burning in megacities.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Environmental Sciences
Ying Yao, Francisco J. Artigas, Songyun Fan, Yuan Gao
Summary: Improved air quality has been observed in northern New Jersey since the COVID-19 pandemic. During the Stay-at-home stage, there was a significant decrease in CO2, CO, and NOx emissions, while ground-level ozone increased. With the reopening process, the difference in CO2 levels reduced and NOx concentration returned to the 2019 level. The findings suggest the benefits of transitioning to electric or renewable energy in transportation systems and industry.
WATER AIR AND SOIL POLLUTION
(2022)
Article
Environmental Sciences
Marco Falocchi, Dino Zardi, Lorenzo Giovannini
Summary: Pollutant concentrations in the atmosphere are influenced not only by emissions, but also by meteorological processes. The application of meteorological normalization techniques can help disentangle the contribution of weather conditions on observed pollutant concentrations. The strong dependence of observed NO2 concentrations on atmospheric variables justifies the use of a normalization procedure.
ATMOSPHERIC ENVIRONMENT
(2021)
Article
Chemistry, Analytical
Mariusz Rogulski, Artur Badyda, Anna Gayer, Johnny Reis
Summary: The study investigates the measurement data quality of NO2-B43F Alphasense sensors and finds that without using sophisticated correction methods, the measured air pollution concentrations may be greater than their actual values, especially in high temperatures. However, applying the proposed mathematical correction functions significantly reduces errors and eliminates negative measurement values.
Article
Environmental Sciences
Sibel Mentese, Seda Ozgur Ogurtani
Summary: The study analyzed the spatial and seasonal variations of air pollutants in Istanbul from 2007 to 2017, focusing on carbon monoxide, particulate matter, sulfur dioxide, nitrogen oxides, and ozone. It was found that the pollutants exhibited seasonal variations, with higher concentrations during heating periods. Carbon monoxide and ozone showed statistically significant increasing trends and may exceed limit values in the future.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2022)
Article
Construction & Building Technology
Amber M. Yeoman, Marvin Shaw, Alastair C. Lewis
Summary: The use of personal care products during showering results in emissions of volatile organic compounds, with reproducible patterns but noticeable variations in absolute peak concentrations between users. Real-world emissions are lower than estimated, likely due to products being washed away before VOC evaporation could occur.
Article
Construction & Building Technology
Amber M. Yeoman, Aidan C. Heeley-Hill, Marvin Shaw, Stephen J. Andrews, Alastair C. Lewis
Summary: This study quantifies emission factors of six common VOC ingredient from 16 facial day-moisturizers using headspace analysis and mass spectrometry. It finds that facial application of moisturizer can lead to significantly larger inhaled VOC doses than typical indoor ambient air over 24 hours, and the emissions from facially applied PCPs typically decay to background concentrations over periods ranging from 5 to 150 minutes.
Letter
Multidisciplinary Sciences
Muhammad Fahim Khokhar
Article
Geosciences, Multidisciplinary
Peter D. Ivatt, Mathew J. Evans, Alastair C. Lewis
Summary: Global chemical transport simulations show that the reactive uptake of hydroperoxyl radicals onto aerosol particles dominates ozone production in a third photochemical regime. This regime has suppressed surface ozone concentrations in North America and Europe in the past and is currently suppressing surface ozone over Asia. This finding suggests potential trade-off tensions between reducing particle pollution and increasing surface ozone if ozone precursor emissions are not reduced simultaneously.
Article
Environmental Sciences
C. Gameli Hodoli, F. Coulon, M. Mead
Summary: The emergence of low-cost sensors has provided opportunities for identifying atmospheric emission sources based on high-resolution data. This paper demonstrates the potential of low-cost sensors and analytical tools for emission source apportionment in urban areas of Ghana.
ENVIRONMENTAL POLLUTION
(2023)
Article
Environmental Sciences
M. Fahim Khokhar, M. Shehzaib Anjum, Abdus Salam, Vinayak Sinha, Manish Naja, Kirpa Ram, Hiroshi Tanimoto, James H. Crawford, Mohammed I. Mead
ATMOSPHERIC ENVIRONMENT
(2023)
Article
Environmental Sciences
Khoi Quang Ngo, Le Anh Hoang, Bang Quoc Ho, Neil R. P. Harris, Gillian H. Drew, Mohammed Iqbal Mead
Summary: Traffic is a major source of air pollution in Vietnamese cities, and the spatio-temporal variation of pollution caused by traffic is not well understood. This study fills the data gap by using open-access global data to model traffic emissions in Hanoi. The results show that pollution hotspots are located near major traffic flows, with the highest concentrations of CO, PM10, and PM2.5 observed.
ENVIRONMENTAL RESEARCH
(2023)
Editorial Material
Multidisciplinary Sciences
Alastair C. Lewis, Deborah Jenkins, Christopher J. M. Whitty
Summary: While dirty outdoor air gets more attention, understanding how pollutants form, accumulate, and affect our health indoors is equally important.
Article
Chemistry, Multidisciplinary
Diego Lopez-Alcala, Alberto M. Ruiz, Jose J. Baldovi
Summary: Layered magnetic metal-organic frameworks (MOFs) have the potential to achieve high-TC magnetism at the 2D limit. This study investigates the exfoliation feasibility and analyzes the structural, electronic, magnetic, and vibrational properties of VCl2(pyz)(2) and CrCl2(pyz)(2) by first-principles calculations. The spin-phonon coupling (SPC) and thermal evolution of magnetic properties are also analyzed, providing insights for improving the performance of these magnetic 2D MOFs.
Article
Chemistry, Analytical
Thomas Warburton, Stuart K. Grange, James R. Hopkins, Stephen J. Andrews, Alastair C. Lewis, Neil Owen, Caroline Jordan, Greg Adamson, Bin Xia
Summary: Plug-in fragrance diffusers, commonly found in homes, were evaluated for their effects on indoor air quality. Air samples were taken from 60 homes in Ashford, UK, with the diffuser on or off. The concentrations of volatile organic compounds (VOCs) were measured using gas chromatography. The study found that homes with low air exchange rates and using the diffuser had higher concentrations of fragrance VOCs.
ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS
(2023)
Review
Environmental Sciences
Madeleine L. Wright, Alastair C. Lewis
Summary: This article reviews the potential air quality impacts of using hydrogen-diesel blends in heavy-duty diesel engines. Engine load is identified as a key factor influencing NOx emissions, and the variation in experimental parameters complicates the relationship. Exhaust gas recirculation and existing aftertreatment technologies may help reduce NOx emissions. However, there is a disconnect between commercial reporting and peer-reviewed literature regarding the impact of hydrogen fuel on NOx emissions.
ENVIRONMENTAL SCIENCE-ATMOSPHERES
(2022)
Article
Environmental Sciences
Madeleine L. Wright, Alastair C. Lewis
Summary: The UK is considering blending up to 20% hydrogen into the national gas network, which may lead to changes in nitrogen oxides emissions and corresponding damage costs. An economic case for scrappage and replacement of existing poor performing boilers based on NOx damage costs avoided is possible.
ELEMENTA-SCIENCE OF THE ANTHROPOCENE
(2022)
Article
Environmental Sciences
Beth S. Nelson, Gareth J. Stewart, Will S. Drysdale, Mike J. Newland, Adam R. Vaughan, Rachel E. Dunmore, Pete M. Edwards, Alastair C. Lewis, Jacqueline F. Hamilton, W. Joe Acton, C. Nicholas Hewitt, Leigh R. Crilley, Mohammed S. Alam, Ulku A. Sahin, David C. S. Beddows, William J. Bloss, Eloise Slater, Lisa K. Whalley, Dwayne E. Heard, James M. Cash, Ben Langford, Eiko Nemitz, Roberto Sommariva, Sam Cox, Shivani, Ranu Gadi, Bhola R. Gurjar, James R. Hopkins, Andrew R. Rickard, James D. Lee
Summary: This study in Delhi found that limiting VOCs is the primary factor contributing to O3 pollution, reducing NOx concentrations may lead to a significant increase in P(O-3). In addition to road transport, reducing emissions from manufacturing and process activities are needed to effectively reduce O-3 pollution.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2021)
Article
Environmental Sciences
Benjamin A. Nault, Duseong S. Jo, Brian C. McDonald, Pedro Campuzano-Jost, Douglas A. Day, Weiwei Hu, Jason C. Schroder, James Allan, Donald R. Blake, Manjula R. Canagaratna, Hugh Coe, Matthew M. Coggon, Peter F. DeCarlo, Glenn S. Diskin, Rachel Dunmore, Frank Flocke, Alan Fried, Jessica B. Gilman, Georgios Gkatzelis, Jacqui F. Hamilton, Thomas F. Hanisco, Patrick L. Hayes, Daven K. Henze, Alma Hodzic, James Hopkins, Min Hu, L. Greggory Huey, B. Thomas Jobson, William C. Kuster, Alastair Lewis, Meng Li, Jin Liao, M. Omar Nawaz, Ilana B. Pollack, Jeffrey Peischl, Bernhard Rappengluck, Claire E. Reeves, Dirk Richter, James M. Roberts, Thomas B. Ryerson, Min Shao, Jacob M. Sommers, James Walega, Carsten Warneke, Petter Weibring, Glenn M. Wolfe, Dominique E. Young, Bin Yuan, Qiang Zhang, Joost A. de Gouw, Jose L. Jimenez
Summary: The production of ASOA is strongly correlated with the reactivity of specific anthropogenic volatile organic compounds, with differences in ASOA production between cities explained by variations in emissions of aromatics and intermediate- and semi-volatile organic compounds. An improved model estimates that ASOA contributes to 340,000 PM2.5-related premature deaths per year, over an order of magnitude higher than previous studies. However, the extrapolation from cities with detailed studies to regions with larger uncertainties in emissions is a limitation of this study. Further development of institutional air quality management infrastructure and comprehensive air quality campaigns in specific regions are needed for progress in this area.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2021)
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)
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)