Article
Geosciences, Multidisciplinary
Kei Kawai, Hitoshi Matsui, Yutaka Tobo
Summary: Recent observations have shown that dust emitted within the Arctic has a high ice nucleating ability, especially in the temperature range of -20°C to -5°C. This study incorporates an observation-based ice-nucleation parameterization into a global aerosol-climate model to better understand the impacts of Arctic dust on ice nucleating particles (INPs) and radiative balance in the Arctic. The results highlight the importance of using an ice-nucleation parameterization suitable for Arctic dust to accurately simulate INPs and their effects on aerosol-cloud interactions in the Arctic.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Meteorology & Atmospheric Sciences
Grace C. E. Porter, Michael P. Adams, Ian M. Brooks, Luisa Ickes, Linn Karlsson, Caroline Leck, Matthew E. Salter, Julia Schmale, Karolina Siegel, Sebastien N. F. Sikora, Mark D. Tarn, Jutta Vullers, Heini Wernli, Paul Zieger, Julika Zinke, Benjamin J. Murray
Summary: The study found that during the summer of 2018, high concentrations of biological INPs were sporadically present at the North Pole. These concentrations sometimes reached levels similar to those recorded in mid-latitude locations strongly impacted by highly active biological INPs, in contrast to the Southern Ocean. Furthermore, using a balloon borne sampler, the study demonstrated that INP concentrations differed between the surface and higher in the boundary layer where clouds form. These findings suggest that Arctic climate is sensitive to transport from regions that are already experiencing climate change.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2022)
Article
Environmental Sciences
Jonathan Trueblood, Alessia Nicosia, Anja Engel, Birthe Zancker, Matteo Rinaldi, Evelyn Freney, Melilotus Thyssen, Ingrid Obernosterer, Julie Dinasquet, Franco Belosi, Antonio Tovar-Sanchez, Araceli Rodriguez-Romero, Gianni Santachiara, Cecile Guieu, Karine Sellegri
Summary: INPs have a significant impact on cloud properties over oceans. Recent studies show that marine INPs come from two classes of organic matter in SSAs, yet current parameterizations may mask specific trends. This paper proposes a new parameterization based on field study results to better understand the connection between ocean biology and marine INP abundance.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2021)
Article
Geosciences, Multidisciplinary
M. K. Sporre, J. Friberg, C. Svenhag, O. Sourdeval, T. Storelvmo
Summary: This study investigates the impact of downwelling sulphate aerosol on midlatitude cirrus clouds during springtime using three satellite data sets. The results show that cirrus clouds in the northern hemisphere have lower ice water content, ice crystal number concentrations, and cloud fraction when the aerosol load in the lowermost stratosphere is elevated by volcanism. However, the cirrus clouds in the southern hemisphere show no significant changes with downwelling aerosol levels. The reduction in cirrus ice water content and cloud fraction in the northern hemisphere implies that volcanic aerosol can cool the climate through reduced warming from cirrus clouds.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Environmental Sciences
Cynthia H. Twohy, Paul J. DeMott, Lynn M. Russell, Darin W. Toohey, Bryan Rainwater, Roy Geiss, Kevin J. Sanchez, Savannah Lewis, Gregory C. Roberts, Ruhi S. Humphries, Christina S. McCluskey, Kathryn A. Moore, Paul W. Selleck, Melita D. Keywood, Jason P. Ward, Ian M. McRobert
Summary: Stratocumulus clouds over the Southern Ocean are likely to contain fewer droplets and exist in a supercooled phase due to limited cloud-nucleating particles, with biogenic sulfur-based particles and organic ice nucleating particles playing major roles. As global warming leads to decreased sea ice, increased phytoplankton activity, and stronger winds near Antarctica, cloud nucleating particles may increase, making clouds in the region more reflective. Detailed modeling studies are necessary to verify this hypothesis due to the complexity of ocean-cloud-climate feedbacks in the Southern Ocean.
Article
Environmental Sciences
Xi Zhao, Xiaohong Liu, Susannah M. Burrows, Yang Shi
Summary: The study suggests that marine organic aerosol (MOA) plays an important role in mixed-phase clouds, altering cloud properties and radiative forcing. Model results indicate that MOA dominates primary ice nucleation below 400 hPa over the Southern Ocean and Arctic boundary layer, while dust INPs are more abundant elsewhere. The annual global mean net cloud forcing changes due to CCN and INPs of MOA are -0.35 and 0.016 W m(-)(2), respectively.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2021)
Article
Environmental Sciences
Konstantina Nakoudi, Christoph Ritter, Iwona S. Stachlewska
Summary: This study explores the long-term properties of cirrus clouds for the first time over an Arctic site, finding that cirrus clouds are generally associated with colder and calmer wind conditions, but their properties do not strongly depend on temperature and wind speed, with wintertime cirrus appearing thicker and with more spherical ice particles. The majority of cirrus at the Arctic site are associated with westerly flow and tend to be optically thicker and consist of more spherical ice particles compared to lower latitudes.
Review
Environmental Sciences
Shu Huang, Wei Hu, Jie Chen, Zhijun Wu, Daizhou Zhang, Pingqing Fu
Summary: Biological particles in the Earth's atmosphere play a crucial role as ice nucleating particles, influencing cloud and precipitation formation, and regional climate. Research has shown the ice nucleating properties and controlling factors of biological particles from various sources, yet there remain uncertainties and open questions for further investigations in this field.
ENVIRONMENT INTERNATIONAL
(2021)
Article
Meteorology & Atmospheric Sciences
Chuan He, Yan Yin, Wuyi Wang, Kui Chen, Rong Mai, Hui Jiang, Xin Zhang, Chenwei Fang
Summary: Airborne measurements were conducted to study the vertical distribution of ice nucleating particles (INPs) over the Northern China Plain, revealing that aerosols sampled at higher altitudes have better ice nucleation capacity. Additionally, a strong correlation was found between INPs sampled in low humidity areas and aerosol particles larger than 0.5 μm in diameter.
ATMOSPHERIC RESEARCH
(2021)
Article
Geosciences, Multidisciplinary
Tim Carlsen, Robert O. David
Summary: Mixed-phase clouds (MPCs), consisting of supercooled cloud droplets and ice crystals, have important impacts on Earth's radiative energy balance and hydrological cycle. Analysis of satellite observations reveals that snow and sea ice cover in high-latitudes significantly reduces the temperature at which MPCs form, indicating the essential role of ice-nucleating particles (INPs) in controlling cloud phase evolution.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Meteorology & Atmospheric Sciences
Aimee Melchum, Fernanda Cordoba, Eva Salinas, Leticia Martinez, Guadalupe Campos, Irma Rosas, Ernesto Garcia-Mendoza, Aramis Olivos-Ortiz, Graciela B. Raga, Berenice Pizano, Ma. Montserrat Silva, Luis A. Ladino
Summary: Airborne biological particles, including bacteria, fungi, and marine phytoplankton, have the potential to impact the hydrological cycle by acting as ice nucleating particles. However, their variability and ice nucleation abilities are uncertain. A study in Mexico found that out of 56 microorganisms tested, 15 triggered ice formation at temperatures above -21.5°C, but the majority of them were considered inefficient INPs with median freezing temperatures below -25°C. Phytoplankton showed the highest ice nucleation ability, while fungal propagules had the lowest potential to impact mixed-phase cloud formation.
ATMOSPHERIC RESEARCH
(2023)
Article
Meteorology & Atmospheric Sciences
Diana L. Pereira, Ma Montserrat Silva, Rocio Garcia, Graciela B. Raga, Harry Alvarez-Ospina, Giovanni Carabali, Irma Rosas, Leticia Martinez, Eva Salinas, Sandra Hidalgo-Bonilla, Luis A. Ladino
Summary: This study found differences in ice nucleating abilities between tropical urban areas and rural regions, with the influence of human activities in cities contrasting with the impact of biological materials in rural sites. Bacteria and fungal propagules were consistently present in cloud water and rainwater samples. INPs concentrations in rainwater samples collected in tropical regions were lower compared to other areas, suggesting unique characteristics in tropical latitudes.
ATMOSPHERIC RESEARCH
(2021)
Article
Geosciences, Multidisciplinary
X. Jing, J. Yang, T. Li, J. Hu, C. He, Y. Yin, P. J. DeMott, Z. Wang, H. Jiang, K. Chen
Summary: This study investigates the pre-activation of ice nucleating particles (INPs) in deposition mode and finds that pre-activated INPs can enhance ice generation in mixed-phase clouds. The activation efficiency of INPs is increased after pre-activation, even at relatively warm temperatures such as -10 degrees C. This research provides important evidence for understanding and predicting cloud and precipitation processes.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Meteorology & Atmospheric Sciences
Ottmar Moehler, Michael Adams, Larissa Lacher, Franziska Vogel, Jens Nadolny, Romy Ullrich, Cristian Boffo, Tatjana Pfeuffer, Achim Hobl, Maximilian Weiss, Hemanth S. K. Vepuri, Naruki Hiranuma, Benjamin J. Murray
Summary: Atmospheric ice-nucleating particles play a crucial role in cloud phase determination, but the lack of global data on their spatial and temporal variation hampers our understanding of ice-containing clouds. The new Portable Ice Nucleation Experiment (PINE) instrument demonstrates the ability to measure INP concentrations under various temperature conditions, making it a promising tool for automated field measurements and long-term monitoring.
ATMOSPHERIC MEASUREMENT TECHNIQUES
(2021)
Article
Ecology
Jessie M. Creamean, Julio E. Ceniceros, Lilyanna Newman, Allyson D. Pace, Thomas C. J. Hill, Paul J. DeMott, Matthew E. Rhodes
Summary: Aerosols play a crucial role in cloud formation, with biologically derived materials serving as ice nucleating particles, but the diversity and limited observations of bioaerosols make it challenging to determine the magnitude of their interactions with clouds. Extremophiles from the domain Archaea, including halophiles like the ones found in hypersaline environments, demonstrate the ability to induce ice formation, suggesting the importance of evaluating their impact on clouds.
Article
Engineering, Chemical
Benjamin Swanson, Maxwell Freeman, Samir Rezgui, J. Alex Huffman
Summary: A spectroscopic technique has been developed to provide inexpensive information about important pollen groups, overcoming the difficulties in pollen classification. By using a single-particle fluorescence spectrometer to analyze super-micron atmospheric bioparticles, such as pollen and fungal spores, collected onto a substrate, rough separation of fresh pollen samples can be achieved through the classification of individual particles using a random forest algorithm.
AEROSOL SCIENCE AND TECHNOLOGY
(2023)
Review
Chemistry, Multidisciplinary
Shunyao Wang, Yue Zhao, Arthur W. H. Chan, Min Yao, Zhongming Chen, Jonathan P. D. Abbatt
Summary: Organic peroxides (POs) are important reactive intermediates in atmospheric multiphase processes. They play a key role in the formation, growth, aging, climate, and health impacts of aerosol. This article summarizes the current understanding of atmospheric POs, including their identification, quantification, formation mechanisms, transformation pathways, and environmental and health impacts. The study highlights the need to understand the complex nature and dynamic behavior of POs in order to fully comprehend their origin, fate, and impacts in the atmosphere.
Article
Engineering, Environmental
Spiro D. Jorga, Yutong Wang, Jonathan P. D. Abbatt
Summary: High loadings of biomass burning aerosol particles from wildfire or residential heating sources can deposit onto surfaces and interact with oxidants. Hypochlorous acid (HOCl), emitted during cleaning with chlorine-cleaning agents, can form organochlorine pollutants when exposed to wood smoke aerosol particles. Unsaturated species in wood smoke such as coniferaldehyde and furfural react efficiently with HOCl. The presence of biomass burning emissions suppresses active chlorine recycling in the outdoor environment.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Emily Reidy, Brandon P. Bottorff, Colleen Marciel F. Rosales, Felipe J. Cardoso-Saldan, Caleb Arata, Shan Zhou, Chen Wang, Andrew Abeleira, Lea Hildebrandt Ruiz, Allen H. Goldstein, Atila Novoselac, Tara F. Kahan, Jonathan P. D. Abbatt, Marina E. Vance, Delphine K. Farmer, Philip S. Stevens
Summary: There have been relatively few measurements of the OH radical in indoor environments despite its importance outdoors. Elevated concentrations of OH were observed near a window during cooking events, in addition to elevated mixing ratios of HONO, VOCs, and NOX. The measured OH concentrations were underestimated by a chemical model, even during periods of direct sunlight, indicating incomplete understanding of oxidation in indoor environments.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Review
Geochemistry & Geophysics
Daniel Q. Tong, Thomas E. Gill, William A. Sprigg, Robert Scott Van Pelt, Alexander A. Baklanov, Bridget Marie Barker, Jesse E. Bell, Juan Castillo, Santiago Gasso, Cassandra J. Gaston, Dale W. Griffin, Nicolas Huneeus, Ralph A. Kahn, Arunas P. Kuciauskas, Luis A. Ladino, Junran Li, Olga L. Mayol-Bracero, Orion Z. McCotter, Pablo A. Mendez-Lazaro, Pierpaolo Mudu, Slobodan Nickovic, Damian Oyarzun, Joseph Prospero, Graciela B. Raga, Amit U. Raysoni, Ling Ren, Nikias Sarafoglou, Andrea Sealy, Ziheng Sun, Ana Vukovic Vimic
Summary: This study examines the sources, characteristics, and effects of airborne soil particles (dust) on human and environmental health in the Pan-American region. Dust poses risks to human health, including respiratory problems and fungal infections, and also impacts the environment through contamination of water and food sources, spread of pathogens, and disruption of energy generation. Regional and international collaboration is needed to mitigate these risks.
REVIEWS OF GEOPHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Natalie R. Smith, Giuseppe V. Crescenzo, Allan K. Bertram, Sergey A. Nizkorodov, Celia L. Faiola
Summary: Plant stress can affect the emissions of volatile organic compounds, which in turn can impact the properties of secondary organic aerosols (SOA). This study examined the chemical composition and viscosity of SOA generated from healthy and aphid-stressed Canary Island pine trees. The results show that aphid-stressed pine tree SOA has higher viscosity, which is attributed to the increased fraction of sesquiterpenes in the emissions.
ACS EARTH AND SPACE CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Kristian J. J. Kiland, Fabian Mahrt, Long Peng, Sepehr Nikkho, Julia Zaks, Giuseppe V. V. Crescenzo, Allan K. K. Bertram
Summary: Biomass burning events release phenolic compounds, which oxidize and form secondary organic aerosol (SOA). We measured the relative humidity (RH)-dependent viscosities of three biomass burning phenolic compounds' SOA. The viscosity of the SOA is strongly dependent on both RH and temperature. Phenolic biomass burning SOA can be highly viscous at room temperature and becomes a glass at low temperatures. The mixing time of organic molecules in phenolic biomass burning SOA particles is more than 1 hour above 3 km in the troposphere.
ACS EARTH AND SPACE CHEMISTRY
(2023)
Article
Environmental Sciences
M. Fernanda Cordoba, Ernesto Garcia-Mendoza, Aramis Olivos, Graciela B. Raga, M. de los Angeles Horta, Luis A. Ladino
Summary: Marine aerosol particles from biogenic origin can act as ice nucleating particles (INPs) and play a role in mixed-phase cloud formation. This study evaluated the ice nucleating abilities of water samples collected in the Gulf of California (GoC) and off the west coast of the Baja California Peninsula (WBCP) at different depths. The results showed that the freezing temperature and ice nucleating abilities varied with depth, indicating that superficial waters contain more ice active material. The concentrations of INPs were lower in the Mexican Pacific Ocean compared to higher latitudes, but the locally emitted marine aerosol particles can still impact mixed-phase cloud formation.
ATMOSPHERIC ENVIRONMENT
(2023)
Article
Meteorology & Atmospheric Sciences
Aimee Melchum, Fernanda Cordoba, Eva Salinas, Leticia Martinez, Guadalupe Campos, Irma Rosas, Ernesto Garcia-Mendoza, Aramis Olivos-Ortiz, Graciela B. Raga, Berenice Pizano, Ma. Montserrat Silva, Luis A. Ladino
Summary: Airborne biological particles, including bacteria, fungi, and marine phytoplankton, have the potential to impact the hydrological cycle by acting as ice nucleating particles. However, their variability and ice nucleation abilities are uncertain. A study in Mexico found that out of 56 microorganisms tested, 15 triggered ice formation at temperatures above -21.5°C, but the majority of them were considered inefficient INPs with median freezing temperatures below -25°C. Phytoplankton showed the highest ice nucleation ability, while fungal propagules had the lowest potential to impact mixed-phase cloud formation.
ATMOSPHERIC RESEARCH
(2023)
Article
Engineering, Environmental
Florence K. A. Gregson, Nealan G. A. Gerrebos, Meredith Schervish, Sepehr Nikkho, Elijah G. Schnitzler, Carley Schwartz, Christopher Carlsten, Jonathan P. D. Abbatt, Saeid Kamal, Manabu Shiraiwa, Allan K. Bertram
Summary: Smoke particles generated by burning biomass contain two organic phases with different viscosities dependent on relative humidity. This can have implications for reaction kinetics and cloud formation in the atmosphere, as well as increase the atmospheric lifetime of brown carbon and its predicted warming effect on climate.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Zilin Zhou, Leigh R. Crilley, Jenna C. Ditto, Trevor C. Vandenboer, Jonathan P. D. Abbatt
Summary: Unsaturated triglycerides found in food and skin oils are reactive in ambient air, but their chemical fate in genuine indoor environments is not well understood. This study monitored the aging of oil coatings on glass surfaces and found that ozonolysis is the dominant degradation pathway for oil films in both commercial and office settings. Indoor photooxidation was found to accelerate radical formation on surfaces. The reactive oxygen species (ROS) observed may induce oxidative stress in human bodies and further investigation of their toxicological properties is warranted.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Review
Physics, Multidisciplinary
Mira L. Poehlker, Christopher Poehlker, Ovid O. Krueger, Jan-David Foerster, Thomas Berkemeier, Wolfgang Elbert, Janine Froehlich-Nowoisky, Ulrich Poeschl, Gholamhossein Bagheri, Eberhard Bodenschatz, J. Alex Huffman, Simone Scheithauer, Eugene Mikhailov
Summary: This review critically considers and summarizes scientific knowledge on the properties of respiratory particles, including their number concentrations, size distributions, composition, and mixing state. It proposes a parameterization approach based on these properties to trace and locate the sources of infectious particles, which can support medical treatment and risk assessment. The study confirms the high relevance of vocalization in the transmission of SARS-CoV-2 and highlights the effectiveness of preventive measures such as physical distancing, face masks, ventilation, and air filtration against COVID-19 and other airborne infectious diseases.
REVIEWS OF MODERN PHYSICS
(2023)
Article
Biochemistry & Molecular Biology
Amani Y. Alhalwani, Rachel L. Davey, John E. Repine, J. Alex Huffman
Summary: Lactoferrin (LF) is a multifunctional protein with antimicrobial, anti-inflammatory, and antioxidant effects. Nitrosative stress can reduce LF's activity by modifying its tyrosine residues. This study investigated the protective effect of Lergothioneine (ET), an anti-inflammatory antioxidant, on LF's antibacterial function against nitration. The results showed that ET treatment reduced chemical modification and maintained the antibacterial activity of LF when exposed to nitrating reagents.
BIOCHEMISTRY AND BIOPHYSICS REPORTS
(2023)
Article
Chemistry, Analytical
Jenna C. Ditto, Leigh R. Crilley, Melodie Lao, Trevor C. VandenBoer, Jonathan P. D. Abbatt, Arthur W. H. Chan
Summary: Gas and particulate emissions from commercial kitchens significantly impact urban air quality. This study analyzed volatile organic compounds and particulate matter concentrations in a well-ventilated commercial kitchen during cooking and cleaning operations. The results showed that cooking emissions primarily consist of oxygenated compounds from cooking oil degradation. The high ventilation rate effectively reduces exposure to gas-phase chemicals, but exposure to particulate matter and chlorinated gases increases during evening cleaning. This highlights the importance of careful consideration of ventilation rates and methods in commercial kitchen environments.
ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS
(2023)
Article
Environmental Sciences
Pascale S. J. Lakey, Andreas Zuend, Glenn C. Morrison, Thomas Berkemeier, Jake Wilson, Caleb Arata, Allen H. Goldstein, Kevin R. Wilson, Nijing Wang, Jonathan Williams, Jonathan P. D. Abbatt, Manabu Shiraiwa
Summary: Studies have shown that the reaction of squalene with ozone can produce various products, and the yield depends on relative humidity. A new mechanism has been developed to simulate these reactions and control the concentrations of different products accordingly. Increasing relative humidity significantly impacts the concentrations of various products.
ENVIRONMENTAL SCIENCE-ATMOSPHERES
(2023)
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)
