Article
Meteorology & Atmospheric Sciences
K. E. Knowland, C. A. Keller, P. A. Wales, K. Wargan, L. Coy, M. S. Johnson, J. Liu, R. A. Lucchesi, S. D. Eastham, E. Fleming, Q. Liang, T. Leblanc, N. J. Livesey, K. A. Walker, L. E. Ott, S. Pawson
Summary: The GEOS-CF system, which combines the GEOS Earth system model with the GEOS-Chem UCX chemistry extension, provides near-real-time estimates and forecasts of atmospheric composition. The system has been compared to observation data and shows good agreement, although some biases exist.
JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS
(2022)
Article
Meteorology & Atmospheric Sciences
P. A. Wales, C. A. Keller, K. E. Knowland, S. Pawson, S. Choi, F. Hendrick, M. Van Roozendael, R. J. Salawitch, R. Sulieman, W. F. Swanson
Summary: During polar spring, elevated tropospheric bromine levels lead to significant reduction in surface ozone. This study presents a method for parameterizing emissions of molecular bromine over the Arctic using satellite retrievals of bromine monoxide. The method accounts for uncertainties in modeling background bromine and estimates daily flux of bromine using internal model parameters. While the technique successfully models ozone reduction during isolated periods, it underestimates ozone loss and does not simulate low ozone observed at coastal stations.
JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS
(2023)
Article
Multidisciplinary Sciences
Carlos A. Cuevas, Rafael P. Fernandez, Douglas E. Kinnison, Qinyi Li, Jean-Francois Lamarque, Tarek Trabelsi, Joseph S. Francisco, Susan Solomon, Alfonso Saiz-Lopez
Summary: This study found that the injection of iodine into the Antarctic stratosphere has a significant impact on the formation and development of the Antarctic ozone hole, especially in spring. The inclusion of iodine can advance the formation of the ozone hole and delay its closure, increasing the area and mass deficit of the hole.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Geosciences, Multidisciplinary
Liam Bindle, Randall V. Martin, Matthew J. Cooper, Elizabeth W. Lundgren, Sebastian D. Eastham, Benjamin M. Auer, Thomas L. Clune, Hongjian Weng, Jintai Lin, Lee T. Murray, Jun Meng, Christoph A. Keller, William M. Putman, Steven Pawson, Daniel J. Jacob
Summary: This study presents the development, validation, and demonstration of stretched grids in the high-performance GEOS-Chem atmospheric chemistry model at global scale. The flexibility and effectiveness of stretched-grid simulations are showcased through two case studies, highlighting the advantages over traditional cubed-sphere simulations.
GEOSCIENTIFIC MODEL DEVELOPMENT
(2021)
Article
Multidisciplinary Sciences
Susan Solomon, Kimberlee Dube, Kane Stone, Pengfei Yu, Doug Kinnison, Owen B. Toon, Susan E. Strahan, Karen H. Rosenlof, Robert Portmann, Sean Davis, William Randel, Peter Bernath, Chris Boone, Charles G. Bardeen, Adam Bourassa, Daniel Zawada, Doug Degenstein
Summary: In the 2019/20 austral summer, Australian wildfires emitted smoke into the stratosphere, leading to increased optical extinction in the midlatitudes of the southern hemisphere. The smoke, coated with sulfuric acid and water, caused a decrease in reactive nitrogen concentrations and had an impact on chlorine and reactive hydrogen species, potentially depleting the ozone layer. These findings suggest that if wildfire smoke injection into the stratosphere increases as the world warms, ozone recovery could be impeded.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Multidisciplinary Sciences
Edward Charlesworth, Felix Ploeger, Thomas Birner, Rasul Baikhadzhaev, Marta Abalos, Nathan Luke Abraham, Hideharu Akiyoshi, Slimane Bekki, Fraser Dennison, Patrick Joeckel, James Keeble, Doug Kinnison, Olaf Morgenstern, David Plummer, Eugene Rozanov, Sarah Strode, Guang Zeng, Tatiana Egorova, Martin Riese
Summary: Water vapor plays a crucial role in the climate system, affecting various aspects including radiation, cloud formation, atmospheric chemistry, and dynamics. The abundance of water vapor in the lowermost stratosphere has a significant impact on the atmospheric circulation in both the stratosphere and troposphere. Current climate models show a moist bias in this region, which can be attributed to the transport scheme used. This study highlights the importance of accurately representing lowermost stratospheric water vapor in models and suggests the use of a less diffusive Lagrangian scheme to improve model performance.
NATURE COMMUNICATIONS
(2023)
Article
Environmental Sciences
Robert G. Ryan, Eloise A. Marais, Chloe J. Balhatchet, Sebastian D. Eastham
Summary: A detailed examination of the impact of modern space launches on the Earth's atmosphere is crucial due to the booming investment in the space industry and the anticipated space tourism era. Recent studies have found that nitrogen oxides and chlorine from rocket launches and re-entry contribute equally to stratospheric ozone depletion. While the decline in global stratospheric ozone is small (0.01%), it reaches 0.15% in the upper stratosphere after a decade of sustained growth in launches and re-entries. With a decade of emissions from space tourism rockets, the ozone depletion increases to 0.24%, undermining the recovery achieved with the Montreal Protocol. Furthermore, rocket emissions of black carbon produce substantial global mean radiative forcing, surpassing emissions from all other sources.
Article
Geosciences, Multidisciplinary
F. Robertson, L. E. Revell, H. Douglas, A. T. Archibald, O. Morgenstern, D. Frame
Summary: The year when total column ozone (TCO) returns to 1980 levels is commonly used to measure recovery from ozone-depleting substances. However, this metric fails to account for internal variability and the timing of significant TCO losses. Using the signal-to-noise (S/N) metric, this study investigates how TCO can return to pre-disturbance conditions. The findings suggest that TCO de-emerges before returning to its 1980 value, making S/N a suitable metric for determining TCO recovery.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Geosciences, Multidisciplinary
F. Robertson, L. E. Revell, H. Douglas, A. T. Archibald, O. Morgenstern, D. Frame
Summary: Research suggests that the year when total column ozone (TCO) returns to 1980 levels is commonly used as an indicator of recovery from ozone-depleting substances. However, this date is somewhat arbitrary. In this study, the signal-to-noise (S/N) metric from climate change research is used to investigate how TCO might return to pre-ozone hole era levels. The findings show that a return to 1980 levels does not necessarily represent TCO recovery to pre-disturbance conditions, and the S/N ratio is a more appropriate and complementary metric.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Environmental Sciences
Yuqi Zhu, Yiming Liu, Siting Li, Haolin Wang, Xiao Lu, Haichao Wang, Chong Shen, Xiaoyang Chen, Pakwai Chan, Ao Shen, Haofan Wang, Yinbao Jin, Yifei Xu, Shaojia Fan, Qi Fan
Summary: In this study, the researchers developed a tool named GC2CMAQ that provides the CMAQ model with chemical boundary conditions (CBCs) from the GEOS-Chem simulation. The results showed that using the CBCs from GEOS-Chem improved the simulation of seasonal ozone (O3) pollution in China compared to the default conditions. The study highlights the importance of using reliable CBCs for regional chemical transport models to achieve better O3 simulation performance.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Clarissa Alicia Kroll, Sally Dacie, Alon Azoulay, Hauke Schmidt, Claudia Timmreck
Summary: Increasing the temperature of the tropical cold-point region through heating by volcanic aerosols leads to increases in the entry value of stratospheric water vapor (SWV) and subsequent changes in the atmospheric energy budget. Analyzing different strengths of tropical volcanic eruptions with sulfur injections, it was found that the aerosol profile shape also plays a role in the SWV increases.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2021)
Article
Geosciences, Multidisciplinary
Joey C. Y. Lam, Amos P. K. Tai, Jason A. Ducker, Christopher D. Holmes
Summary: Ground-level ozone (O-3) is a major air pollutant that affects human health and ecosystem productivity. Plant stomatal uptake of O-3 can cause damage to plant tissues and impact ecosystem and crop health. A new ecophysiology module was developed to simulate land-atmosphere exchange of gas species in a chemical transport model, allowing for dynamic responses to atmospheric changes.
GEOSCIENTIFIC MODEL DEVELOPMENT
(2023)
Article
Environmental Sciences
Mengyun Li, Yang Yang, Hailong Wang, Huimin Li, Pinya Wang, Hong Liao
Summary: In recent years, the level of near-surface ozone (O3) in China has been increasing rapidly, leading to significant damage to human health and ecosystems. This study investigates the impact of the stratospheric quasi-biennial oscillation (QBO) on the interannual variations of summertime tropospheric O3 over China. The results show that QBO has a significant positive correlation with near-surface O3 concentrations over central China under warm sea surface temperature (SST) anomalies.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Meteorology & Atmospheric Sciences
Jens-Uwe Grooss, Rolf Mueller
Summary: In the Arctic winter/spring of 2019/2020, due to very stable polar vortex and exceptionally low stratospheric temperatures until early April, significant chemical ozone depletion occurred. Despite a decrease of more than 10% in chlorine and bromine compounds compared to peak values around 2000, unprecedented ozone depletion was caused by meteorological conditions in winter/spring 2019/2020.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2021)
Article
Environmental Sciences
Leonie Bernet, Ian Boyd, Gerald Nedoluha, Richard Querel, Daan Swart, Klemens Hocke
Summary: Continuous assessment of stratospheric ozone changes in the southern hemisphere is crucial, with data consistency and uncertainties affecting the resulting trends. Consideration of data uncertainties and inhomogeneities is important for accurate evaluation of ozone trends.
Article
Environmental Sciences
Akshat Agarwal, Vincent R. Meijer, Sebastian D. Eastham, Raymond L. Speth, Steven R. H. Barrett
Summary: Model-based estimates of aviation's climate impacts have found that contrails contribute significantly to aviation's radiative forcing. However, current models overestimate the number and lifetime of contrails, and reanalysis data incorrectly identify the regions where contrails can form.
ENVIRONMENTAL RESEARCH LETTERS
(2022)
Article
Environmental Sciences
Prakash Prashanth, Sebastian D. Eastham, Raymond L. Speth, Steven R. H. Barrett
Summary: Aviation emissions, particularly nitrogen oxides (NOx) and sulfur oxides (SOx), have significant impacts on human health and climate change. This study quantifies the contributions of aviation emissions to the formation of secondary aerosols and radiative forcing. The results show that aviation NOx emissions play a dominant role in the formation of nitrate and sulfate aerosols, and they also significantly affect near-surface aerosol concentrations.
ENVIRONMENTAL RESEARCH COMMUNICATIONS
(2022)
Article
Environmental Sciences
Thibaud M. Fritz, Irene C. Dedoussi, Sebastian D. Eastham, Raymond L. Speth, Daven K. Henze, Steven R. H. Barrett
Summary: Depletion of stratospheric ozone and increase in global net ozone from emissions of different types of aircraft were studied. The study used a simulation tool to identify the location of the column ozone-neutral cruise altitude, which was found to vary with factors such as latitude and season.
ATMOSPHERIC ENVIRONMENT
(2022)
Article
Environmental Sciences
Vincent R. Meijer, Luke Kulik, Sebastian D. Eastham, Florian Allroggen, Raymond L. Speth, Sertac Karaman, Steven R. H. Barrett
Summary: Contrails, which contribute to climate change caused by aviation, have uncertain coverage estimates. This study provides observation-based estimates of diurnal, seasonal, and regional variability in contrail coverage in the contiguous United States using a deep learning algorithm and satellite images. The results show a significant reduction in contrail coverage in 2020 compared to 2019, and the diurnal pattern of contrail coverage aligns with flight traffic.
ENVIRONMENTAL RESEARCH LETTERS
(2022)
Article
Meteorology & Atmospheric Sciences
Hongwei Sun, Sebastian Eastham, David Keith
Summary: The Lagrangian plume model has been embedded into a global Eulerian model to establish a multiscale Plume-in-Grid (PiG) model, which allows for more accurate resolution of stratospheric emissions. The results of the PiG model show that the injected tracer is more concentrated, with lower entropy and higher product mass, providing a better simulation of plume physical processes.
JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS
(2022)
Article
Meteorology & Atmospheric Sciences
K. E. Knowland, C. A. Keller, P. A. Wales, K. Wargan, L. Coy, M. S. Johnson, J. Liu, R. A. Lucchesi, S. D. Eastham, E. Fleming, Q. Liang, T. Leblanc, N. J. Livesey, K. A. Walker, L. E. Ott, S. Pawson
Summary: The GEOS-CF system, which combines the GEOS Earth system model with the GEOS-Chem UCX chemistry extension, provides near-real-time estimates and forecasts of atmospheric composition. The system has been compared to observation data and shows good agreement, although some biases exist.
JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS
(2022)
Article
Energy & Fuels
Lyssa M. Freese, Guillaume P. Chossiere, Sebastian D. Eastham, Alan Jenn, Noelle E. Selin
Summary: This article assesses the impacts of a nuclear phase-out in the United States on ground-level ozone and fine particulate matter (PM2.5), discussing the effects on air pollution, climate, and health. By developing a dispatch model and a chemical transport model, the authors estimate emissions and calculate the effects on ozone and PM2.5. The results indicate that the removal of nuclear power leads to increased PM2.5 and ozone levels, resulting in an additional 5,200 annual deaths.
Article
Engineering, Environmental
Sebastian D. Eastham, Erwan Monier, Daniel Rothenberg, Sergey Paltsev, Noelle E. Selin
Summary: This study developed a computationally efficient approach to quantify the effects of combined climate and air quality interventions on air quality outcomes. By fitting individual response surfaces to simulation output for worldwide locations, we found that the sensitivity of air quality to climate change and emission reductions differs by region, highlighting the importance of considering simultaneous air quality interventions in climate policy assessments.
ACS ENVIRONMENTAL AU
(2023)
Article
Environmental Sciences
Fangqun Yu, Gan Luo, Arshad Arjunan Nair, Sebastian Eastham, Christina J. Williamson, Agnieszka Kupc, Charles A. Brock
Summary: While the formation and growth of particles in the troposphere have been extensively studied, limited research has been done in the stratosphere. Using laboratory measurements and in situ observations, this study aims to understand nucleation mechanisms and evaluate model-simulated particle size distributions in the lowermost stratosphere. The results show that the existing models overpredict nucleation rates and particle number concentrations, and suggest the importance of considering ion-mediated nucleation and the effect of charges on coagulation and growth in stratospheric aerosol injection simulations.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Environmental Sciences
Viral Shah, Daniel J. Jacob, Ruijun Dang, Lok N. Lamsal, Sarah A. Strode, Stephen D. Steenrod, K. Folkert Boersma, Sebastian D. Eastham, Thibaud M. Fritz, Chelsea Thompson, Jeff Peischl, Ilann Bourgeois, Ilana B. Pollack, Benjamin A. Nault, Ronald C. Cohen, Pedro Campuzano-Jost, Jose L. Jimenez, Simone T. Andersen, Lucy J. Carpenter, Tomas Sherwen, Mat J. Evans
Summary: Satellite-based retrievals of tropospheric NO2 columns are widely used to infer NOx emissions. These retrievals rely on model information for the vertical distribution of NO2. Free tropospheric background above 2 km is important for these retrievals and has a significant impact on tropospheric OH and ozone concentrations.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Review
Environmental Sciences
Samantha M. Tracy, Jonathan M. Moch, Sebastian D. Eastham, Jonathan J. Buonocore
Summary: This article explores the potential impacts of solar radiation management (SRM), specifically stratospheric aerosol injection (SAI), on global public health. SAI has been extensively studied and has been shown to decrease global temperatures, but it also has direct effects on ecosystems and public health.
ELEMENTA-SCIENCE OF THE ANTHROPOCENE
(2022)
Article
Geosciences, Multidisciplinary
Randall Martin, Sebastian D. Eastham, Liam Bindle, Elizabeth W. Lundgren, Thomas L. Clune, Christoph A. Keller, William Downs, Dandan Zhang, Robert A. Lucchesi, Melissa P. Sulprizio, Robert M. Yantosca, Yanshun Li, Lucas Estrada, William M. Putman, Benjamin M. Auer, Atanas L. Trayanov, Steven Pawson, Daniel J. Jacob
Summary: This article describes the development and improvements of the new generation GCHP global model of atmospheric composition based on GEOS-Chem. GCHP is an offline implementation driven by NASA GEOS meteorological data, offering higher resolution, more accurate transport, and better parallelization.
GEOSCIENTIFIC MODEL DEVELOPMENT
(2022)
Article
Geosciences, Multidisciplinary
Thibaud M. Fritz, Sebastian D. Eastham, Louisa K. Emmons, Haipeng Lin, Elizabeth W. Lundgren, Steve Goldhaber, Steven R. H. Barrett, Daniel J. Jacob
Summary: This study implements the GEOS-Chem chemistry module as a chemical mechanism in CESM and compares it with the CAM-chem chemistry module, identifying some differences in atmospheric chemistry properties between them. Embedding GEOS-Chem in CESM helps accelerate progress in atmospheric science.
GEOSCIENTIFIC MODEL DEVELOPMENT
(2022)
Article
Environmental Sciences
Sebastian D. Eastham, Thibaud Fritz, Ines Sanz-Morere, Prakash Prashanth, Florian Allroggen, Ronald G. Prinn, Raymond L. Speth, Steven R. H. Barrett
Summary: Supersonic aircraft, with current-generation engine technology and fossil-based kerosene fuel, can have impacts on atmospheric composition and non-CO2 climate forcing. The use of zero-sulfur fuel reduces ozone depletion but increases non-CO2 climate impact. The fleet size, flight altitude, and fuel emission also influence ozone depletion and radiative forcing.
ENVIRONMENTAL SCIENCE-ATMOSPHERES
(2022)
Article
Geosciences, Multidisciplinary
William Atkinson, Sebastian D. Eastham, Y-H Henry Chen, Jennifer Morris, Sergey Paltsev, C. Adam Schlosser, Noelle E. Selin
Summary: Air pollution is a significant sustainability challenge, and future anthropogenic precursor and greenhouse gas emissions will have a great impact on human well-being. The development of a public Tool for Air Pollution Scenarios (TAPS) helps assess and address these issues by evaluating pollutant emissions from various climate and air quality actions, coupled with socioeconomic modeling of climate change mitigation.
GEOSCIENTIFIC MODEL DEVELOPMENT
(2022)
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)
