Article
Environmental Sciences
E. Bazo, J. V. Martins, D. Perez-Ramirez, A. Valenzuela, G. Titos, A. Cazorla, D. Fuertes, M. Weiss, A. Turpie, C. Li, F. J. Garcia-Izquierdo, I. Foyo-Moreno, L. Alados-Arboledas, F. J. Olmo
Summary: This work focuses on the setup and optimization of a commercial multiwavelength polarized imaging nephelometer for measuring phase functions and polarized phase functions of ambient aerosol samples. The instrument utilizes a novel design that improves light reflection and energy loss issues. It also features automation of the imaging technique, allowing for real-time measurements. The results demonstrate the instrument's good performance in measuring scattering coefficients and its potential for aerosol typology.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Federica Crova, Alice Corina Forello, Vera Bernardoni, Giulia Calzolai, Silvia Canepari, Stefania Argentini, Francesca Costabile, Maria Agostina Frezzini, Fabio Giardi, Franco Lucarelli, Dario Massabo, Lorenzo Massimi, Silvia Nava, Marco Paglione, Giulia Pazzi, Paolo Prati, Matteo Rinaldi, Mara Russo, Sara Valentini, Gianluigi Valli, Virginia Vernocchi, Roberta Vecchi
Summary: In this paper, the DN-PMF approach was applied to analyze the relative importance of emission strength vs. atmospheric dispersion conditions, providing a more realistic picture of pollution in areas like the Po Valley. The results showed that the diel modulation of PM1 emissions from certain sources was masked by the variability of the mixing layer, highlighting the need for appropriate abatement strategies.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Minsu Choi, Jie Zhang, Yuwei Zhang, Jiwen Fan, Xinghua Li, Qi Ying
Summary: This study investigates the influence of wildfire brown carbon (BrC) on the formation of O-3 and fine particulate matter (PM2.5) through its absorption of ultraviolet (UV) radiation. The results show that BrC UV absorption reduces the formation of O-3 and PM2.5 in the wildfire plume. Additionally, the impact of BrC absorption on O-3 and PM2.5 is relatively small compared to other factors.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Xin Song, Pengfei Tian, Yumin Guo, Tao Du, Zeren Yu, Jinsen Shi, Yi Chang, Jiayun Li, Lei Zhang
Summary: The response of surface ozone to aerosol absorption is more sensitive than to scattering. Mass scattering and absorption efficiencies are able to clearly distinguish surface ozone, and there is a positive correlation between aerosol and ozone in summer.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Huiting Mao, Emmi Felker-Quinn, Barkley Sive, Leiming Zhang, Zhuyun Ye, Hongliang Fang
Summary: This study found a decreasing trend in ozone exposure at Yellowstone National Park and no trend at Grand Teton National Park using different metrics. The traditional method and the Big-leaf model showed discrepancies in estimating high stomatal ozone flux values. A new multivariate function developed through machine learning improved the estimation of stomatal ozone flux variability.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Louise B. Frederickson, Hugo S. Russell, Siegfried Raasch, Zhaoxi Zhang, Johan A. Schmidt, Matthew S. Johnson, Ole Hertel
Summary: In a study conducted at the University of Copenhagen, Denmark, a network of five low-cost air pollution sensor nodes was deployed on the exterior of a building to investigate the transport of pollution from the road below. The results indicated that traffic serves as a common source for air pollution, noise, and traffic count. The correlations between these parameters were generally low, but increased under certain wind conditions. The vertical concentration profile of pollutants did not show a significant gradient. The study also found that the profile is sensitive to stratification conditions.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Wenshuai Xu, Qiao Xing, Libo Pan, Zhanshan Wang, Xiaocong Cao, Weijun Yan, Wenjing Xie, Xinxin Meng, Xiaochen Wu
Summary: The pollution characteristics of volatile organic compounds (VOCs) were determined in urban and background regions in Hainan province, China. The VOC concentrations were higher in the urban area and showed a diurnal variation with two peaks, primarily due to traffic emissions. In the background region, VOC concentrations were lower and showed a single peak in the afternoon, likely influenced by high temperature and intense sunlight. Traffic emissions were the largest contributor to VOCs in both areas, followed by industrial emissions and plant sources.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Qiaolin Zeng, Lihui Wang, Hao Zhu, Sizhu Liu, Chengfang Wang, Liangfu Chen, Jinhua Tao
Summary: Accurate and efficient estimation of near-surface air pollutant concentrations is of practical importance. Current models primarily rely on shallow methods and focus on estimating a single pollutant, facing challenges in capturing complex spatiotemporal patterns and demonstrating inefficiency. To overcome these limitations, a spatiotemporal multi-task Transformer model is proposed to simultaneously estimate the near-surface concentrations of carbon monoxide, nitrogen dioxide, and ozone. Experiments conducted in China demonstrate that the model achieves optimal performance and significantly improves efficiency compared to single-task models.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Xiang Zou, Wangbin Zhang, Shuangye Wu, Jinhai Yu, Jing Song, Hongxi Pang, Yaping Liu, Shugui Hou
Summary: Fluoride contamination poses a great threat to ecosystems and human health, and has raised widespread concern. This study used data from Tibetan ice cores to investigate the sources and trends of atmospheric fluoride in the central Tibetan Plateau over the past few decades. The results showed that dust activities and anthropogenic emissions were the main factors influencing the variation of fluoride in the atmosphere.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Ahmed Khan Salman, Yunsoo Choi, Jincheol Park, Seyedali Mousavinezhad, Mahsa Payami, Mahmoudreza Momeni, Masoud Ghahremanloo
Summary: This study develops and evaluates an emulator model for simulating surface NO2 concentrations in the Contiguous United States. The model demonstrates high accuracy and computational efficiency, making it a promising tool for health impact assessments and emission inventory optimization.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Dexian Chen, Cuizhi Sun, Jun Zhao
Summary: In this study, a new de-smearing method is proposed to reduce the complexity of SMPS data inversion. An analytical formula is derived and included in a full SMPS data inversion scheme. The smearing effect of an SMPS is characterized through voltage step change experiment. The effectiveness and robustness of the de-smearing approach are demonstrated using experimental data.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Hanwei Zhu, Tianyi Ma, Zisimos Toumasatos, Sam Cao, Georgios Karavalakis, Kent C. Johnson, Thomas Durbin
Summary: This study analyzed the emissions of nitrogen oxides (NOx) and ammonia (NH3) from five different goods movement vehicles. The results showed that diesel vehicles with selective catalytic reduction (SCR) had lower NOx emissions, while natural gas vehicles equipped with three-way catalysts (TWCs) had higher NH3 emissions.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Xiao Li, Zechen Yu, Man Yue, Yaman Liu, Kan Huang, Xuguang Chi, Wei Nie, Aijun Ding, Xinyi Dong, Minghuai Wang
Summary: Dust heterogeneous chemistry plays an important role in the atmosphere, and the implementation of a photocatalytic mechanism can improve the accuracy of predictive modeling and environmental impact studies. The results of this study show that the photocatalytic mechanism better reproduces observed aerosol concentrations compared to traditional modeling methods. Additionally, the process of dust heterogeneous chemistry facilitates the removal of aerosol pollutants during dust events.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Chuang Qin, Xianyi Sun, Zhe Yin, Zhihao Yang, Xiao Fu
Summary: This study reveals the significant impacts of synoptic weather patterns and complex terrain on nitrate formation in the North China Plain. The research indicates that these factors can enhance nitrate production vertically and aggravate nitrate pollution at the ground level.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Amanda D. Emert, Kerry Griffis-Kyle, Carlos Portillo-Quintero, Philip N. Smith
Summary: Beef cattle feedlots are significant contributors to air pollution in the United States, especially in terms of particulate matter emissions. Current monitoring and reporting standards do not accurately capture the emissions from these facilities.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Maryam Golbazi, Stefano Alessandrini, Rajesh Kumar, Paddy McCarthy, Patrick C. Campbell, Piyush Bhardwaj, Cenlin He, Jeffery McQueen
Summary: Air quality forecasting is crucial for decision-making and mitigating the impacts of air pollution and wildfires. However, forecast errors limit its effectiveness. This study utilizes the CMAQ model and introduces the AnEn method and new predictors to enhance the accuracy of air quality forecasts, particularly during wildfire events.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Farnaz Hosseinpour, Naresh Kumar, Trang Tran, Eladio Knipping
Summary: Background ozone refers to ground-level ozone in the absence of any domestic anthropogenic emissions. Recent adjustments to air quality models using data fusion techniques have shown an increased contribution of background ozone, exceeding national air quality standards in some regions.
ATMOSPHERIC ENVIRONMENT
(2024)
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
Meteorology & Atmospheric Sciences
Chenxi Liao, Wenhua Gao, Lanzhi Tang, Chengyin Li
Summary: Based on ERA5 data, this study analyzed the characteristics of four hydrometeors and their relationship with precipitation intensity in central eastern China and the northwest Pacific Ocean. The results show that stratiform precipitation is dominated by ice processes, while convective precipitation has comparable contributions from water and ice processes.
ATMOSPHERIC RESEARCH
(2024)
