Article
Environmental Sciences
Li Xing, Tzung-May Fu, Tengyu Liu, Yiming Qin, Liyuan Zhou, Chak K. Chan, Hai Guo, Dawen Yao, Keqin Duan
Summary: This study estimated organic aerosol emissions from cooking during winter in the Pearl River Delta region, China. Results showed that cooking contributes significantly to OA concentrations in urban areas, with different patterns observed between weekdays and weekends. Considering COA emissions in the model increased regional OA concentrations by 4.6% and 7.4% for different scenarios.
ENVIRONMENTAL POLLUTION
(2022)
Article
Meteorology & Atmospheric Sciences
D. A. Knopf, K. R. Barry, T. A. Brubaker, L. G. Jahl, K. A. Jankowski, J. Li, Y. Lu, L. W. Monroe, K. A. Moore, F. A. Rivera-Adorno, K. A. Sauceda, Y. Shi, J. M. Tomlin, H. S. K. Vepuri, P. Wang, N. N. Lata, E. J. T. Levin, J. M. Creamean, T. C. J. Hill, S. China, P. A. Alpert, R. C. Moffet, N. Hiranuma, R. C. Sullivan, A. M. Fridlind, M. West, N. Riemer, A. Laskin, P. J. DeMott, X. Liu
Summary: The prediction of ice formation in clouds presents a significant challenge in atmospheric sciences, particularly the uncertainty in deriving INP number concentrations in cloud-resolving and climate models. The closure pilot study aims to evaluate the level of parameter details and measurement strategies needed to achieve aerosol-ice formation closure, with a focus on guiding immersion freezing schemes in models and identifying causes for INP prediction biases in climate models.
BULLETIN OF THE AMERICAN METEOROLOGICAL SOCIETY
(2021)
Article
Environmental Sciences
Yuanping He, Lei Li, Haolin Wang, Xinqi Xu, Yuman Li, Shaojia Fan
Summary: This study reconstructed the spatiotemporal variabilities and characteristics of ozone (O-3) and fine particulate matter (PM2.5) in Zhuhai, China, and analyzed the interaction between meteorological conditions and the co-occurrence of O3 and PM2.5. The results showed that the relatively weak synoptic winds, low mixing height, and pollution sources in the Pearl River Delta contributed to the high concentrations of O-3 and PM2.5 in Zhuhai.
ENVIRONMENTAL POLLUTION
(2022)
Article
Geosciences, Multidisciplinary
Sudip Chakraborty, Bin Guan, Duane E. Waliser, Arlindo M. da Silva, Sophie Uluatam, Peter Hess
Summary: Despite gaps in our knowledge on aerosol long-range transport, this study develops a global algorithm to detect aerosol atmospheric rivers (AARs), showing their significant contributions to global aerosol transport pathways and their impact on regional air quality conditions.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Astronomy & Astrophysics
Jianmin Xu, Zhijun Zhao, Yanxing Wu, Ying Zhang, Yao Wang, Baoshan Su, Yanni Liang, Tingting Hu, Run Liu
Summary: As the Pearl River Delta (PRD) experiences an increase in autumn mean maximum daily 8-hour average (MDA8) ozone (O-3) concentration despite effective control of O-3 precursors, this study investigates the meteorological causes and identifies variables that contribute to O-3 pollution. Through analyzing the relationships between MDA8 O-3 concentrations and meteorological conditions, an ozone weather index (OWI) is developed to represent the variations in O-3 concentration based on surface downward shortwave radiation flux (DSWRF), relative humidity (RH), and wind speed (WS) data. Atmospheric stagnation (AS) is found to be associated with higher O-3 pollution, and efforts to reduce AS would help mitigate autumn O-3 pollution in the PRD.
EARTH AND SPACE SCIENCE
(2023)
Article
Engineering, Environmental
Xiangying Zeng, Qiongpu Hu, Jiawen Zhang, Qian Song, Liang Xu, Yi Liang, Yang Wu, Zhiqiang Yu
Summary: The regional characteristics of atmospheric organophosphate triesters (OPEs) and organophosphate diesters (Di-OPs) were investigated in the Pearl River Delta (PRD) using passive air samplers. OPEs were mainly distributed in the central part of the region, possibly due to the presence of industries related to OPE-containing products. Di-OPs, on the other hand, were scattered throughout the PRD, indicating direct industrial emission from their applications. Lower levels of certain compounds were detected in summer, suggesting partitioning off particles and photo-transformation.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Environmental Sciences
Qianjun Mao, Li Wang, Wenlong Cao, Min Chen
Summary: This study used molecular dynamics simulations to construct mixed-cluster models of black carbon and ammonium sulphuric acid, and found that changes in relative humidity significantly affect the hygroscopic growth factor. The particle size and wavelength also play a role in influencing this factor.
ATMOSPHERIC POLLUTION RESEARCH
(2022)
Article
Meteorology & Atmospheric Sciences
Fangzhou Li, Wenshi Lin, Zijian Chen, Jiangnan Li, Baolin Jiang
Summary: This study aimed to discuss the differences in aerosol impacts on precipitation from biomass burning emission, anthropogenic emission, and biogenic emission sources. The results showed that anthropogenic emission had the largest impact on precipitation, convection, and cloud microphysical latent heating.
ATMOSPHERIC RESEARCH
(2022)
Article
Environmental Sciences
Lei Li, Qian-Jin Zhou, Pak-Wai Chan, Hong-Long Yang
Summary: Most studies analyzing the effects of urbanisation on local climate have relied on ground observation data, but our study used observation data from a radar wind profiler, radio-acoustic sounding system, and automatic meteorological station to investigate changes in wind and virtual temperature in the upper atmosphere over the Pearl River Estuary. Our results showed significant and rapid changes in both wind speed and virtual temperature at the upper level atmosphere compared to the changes observed at ground level. The increase in virtual temperature in the upper atmosphere was found to be higher than that on the land surface, and the mean decreases in wind speeds were higher at the upper level atmosphere.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2023)
Article
Environmental Sciences
Nana Liu, Shengcheng Cui, Tao Luo, Shunping Chen, Kaixuan Yang, Xuebin Ma, Gang Sun, Xuebin Li
Summary: This study investigates the hygroscopic growth characteristics of different types of aerosols in Qingdao under different seasonal and atmospheric conditions. The results show significant differences in hygroscopic characteristics among different aerosol types, and pollution levels also influence the hygroscopic growth. These findings are important for radiative transfer modeling, remote sensing, and related fields.
Article
Geography
Kangmin Wu, Yijia Chen, Hong 'ou Zhang, Yi Liu, Mengqing Wang, Yuyao Ye, Weixia Gong
Summary: The integration of disruptive innovation with industrial development is crucial in driving global economic and societal reform. Through a case study in the Pearl River Delta in China, this research explores the relationship between ICTs capability and the regional production of strategic emerging technologies (SETs). It is found that ICTs capability plays a critical role in promoting the acquisition of emerging technologies, and effective management of these technologies is vital for firms and nations to enhance competitiveness.
Article
Environmental Sciences
Yong Xie, Yi Su, Xingfa Gu, Tiexi Chen, Wen Shao, Qiaoli Hu
Summary: Accurate and updated aerosol optical properties are important for climate and environment-related studies. This study comprehensively analyzed AOP observations from a ground-based remote sensing instrument in Central China and used two classification methods to investigate aerosol types under different aerosol loadings. The results showed significant variation in aerosol optical depth during the daytime and throughout the year, with dominance of fine-mode aerosols with low absorptivity.
Article
Environmental Sciences
Peiyao Weng, Yu Tian, Hong Zhou, Ying Zheng, Yunzhong Jiang
Summary: This study proposes a real-time saltwater intrusion early warning framework based on timeseries clustering to improve the accuracy and lead time of predictions. By clustering previous observations, a comprehensive 24-h forecast of saltwater intrusion risk is obtained. The latest supervised clustering model, CAMELOT, outperforms traditional unsupervised clustering models and machine learning classifiers. The analysis reveals that the variation in saltwater intrusion length is strongly associated with tidal cycles and upstream discharge.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Engineering, Environmental
Jia-Yong Lao, Rongben Wu, Yongsheng Cui, Shiwen Zhou, Yuefei Ruan, Kenneth M. Y. Leung, Jiaxue Wu, Eddy Y. Zeng, Paul K. S. Lam
Summary: The study highlights the importance of atmospheric deposition and surface runoff as pathways for OPEs to enter and migrate in the Pearl River Estuary; the particle-mediated transport of OPEs is influenced by various factors, including physicochemical properties, environmental factors, and marine microbial activities; there is a need for increased attention to the input and environmental fate of OPEs in the estuary.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Chemical
Chang H. Jung, Young Jun Yoon, Junshik Um, Seoung Soo Lee, Kyung Man Han, Hye Jung Shin, Ji Yi Lee, Yong Pyo Kim
Summary: In this study, the scattering enhancement factors f(RH) for polydispersed aerosols were approximated using the Mie theory, showing reasonable agreement with the values based on the theory. This study is the first to parameterize the size dependency of f(RH) for log normally distributed aerosols.
JOURNAL OF AEROSOL SCIENCE
(2021)
Review
Engineering, Environmental
Hajime Akimoto, Keiichi Sato, Hiroyuki Sase, Yao Dong, Min Hu, Lei Duan, Young Sunwoo, Katsunori Suzuki, Xiaoyan Tang
Summary: This paper reviews the historical development of scientific research and policy related to acid deposition in East Asia and emphasizes the importance of regional governance and cooperation in reducing greenhouse gas emissions and improving air quality.
Article
Chemistry, Multidisciplinary
Saiji Shen, Chu Wu, Yinghui Shang, Hongdou Shen, Yue Liao, Yuting Guo, Min Hu, Xia Wang, Gang Li, Qigang Wang
Summary: The study demonstrated the fabrication of a chitosan-polymer hydrogel with gradient network structure by utilizing the spatial diffusion of acetylacetone within the gel. The mechanical properties and water-retaining ability of the hydrogel were confirmed, showing potential applications in intelligent actuators and flexible robots.
SCIENCE CHINA-CHEMISTRY
(2022)
Article
Environmental Sciences
Mengren Li, Min Hu, Jennifer Walker, Pan Gao, Xin Fang, Nan Xu, Yanhong Qin, Liping Zhou, Kexin Liu, Claudia Czimczik, Xiaomei Xu
Summary: Carbonaceous aerosols, comprising mainly of carbonaceous sources like biogenic, liquid fossil, and coal, were analyzed using dual-carbon isotope method to identify their contributions in different types of sites with varying pollution levels. The study discussed the seasonal variations of carbonaceous aerosol sources in urban Beijing, with biogenic and biomass sources dominating in the background site due to long-range transport. The results provide scientific support for air pollution prevention and control strategies.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Dongjie Shang, Lizi Tang, Xin Fang, Lifan Wang, Suding Yang, Zhijun Wu, Shiyi Chen, Xin Li, Limin Zeng, Song Guo, Min Hu
Summary: This study reveals the changes in particle number concentration (PN) and particle number size distribution (PNSD) in Beijing from 2013 to 2019. It shows that PN decreased from 2013 to 2017, but increased from 2017 to 2019. Factors associated with primary emissions, such as coal combustion and biomass burning, were found to decrease continuously, while factors related to new particle formation (NPF) and secondary oxidation increased in recent years. This study emphasizes the importance of NPF in urban atmosphere under continuous air quality improvement.
ENVIRONMENTAL POLLUTION
(2022)
Review
Environmental Sciences
Yanhong Zhu, Ishaq Dimeji Sulaymon, Xiaodong Xie, Jianjiong Mao, Song Guo, Min Hu, Jianlin Hu
Summary: Particle number concentration (PNC) is an important parameter for evaluating the environmental health and climate effects of particulate matter (PM). This study reviewed PNC levels, trends, and sources in China and found significant spatial heterogeneity in PNC distribution. Traffic emissions were the major source of PNC in selected cities worldwide.
ENVIRONMENTAL POLLUTION
(2022)
Article
Geosciences, Multidisciplinary
Gang Zhao, Min Hu, Zirui Zhang, Lizi Tang, Dongjie Shang, Jie Ren, Xiangxinyue Meng, Yuan Zhang, Miao Feng, Yina Luo, Shishi Yang, Qinwen Tan, Danlin Song, Song Guo, Zhijun Wu, Limin Zeng, Yuanhang Zhang, Shaodong Xie
Summary: The visibility in the Sichuan Basin is worse than that in the North China Plain due to the stronger aerosol extinction enhancement caused by hygroscopic growth. However, the visibility in the Sichuan Basin is still worse than that in the North China Plain under the same conditions. The difference in volume extinction efficiency is attributed to different particle number size distributions.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Engineering, Chemical
Dongjie Shang, Min Hu, Lizi Tang, Xin Fang, Ying Liu, Yusheng Wu, Zhuofei Du, Xuhui Cai, Zhijun Wu, Shengrong Lou, Mattias Hallquist, Song Guo, Yuanhang Zhang
Summary: A one-month comprehensive measurement was conducted in Beijing during the summer of 2016 to deepen the understanding of how polluted new particle formation (NPF) events occur. The study found that clean NPF events were caused by local nucleation and growth, while polluted NPF events were influenced by both local nucleation-growth and regional transport. The contributions of these factors to particle number concentration were 60% and 40% respectively.
Article
Environmental Sciences
Zirui Zhang, Wenfei Zhu, Min Hu, Hui Wang, Lizi Tang, Shuya Hu, Ruizhe Shen, Ying Yu, Kai Song, Rui Tan, Zheng Chen, Shiyi Chen, Francesco Canonaco, Andre S. H. Prevot, Song Guo
Summary: Researchers quantified the secondary organic aerosols (SOA) produced by urban-lifestyle sources under real atmospheric conditions through a combination of laboratory simulation and field observation. They found that vehicle emissions were the dominant source of SOA formation during daytime photochemical processes, and the SOA:POA ratio of vehicle emissions was about 1.4 times larger than that of cooking emissions. These findings not only provide a new approach to quantify urban SOA, but also validate laboratory hypotheses and contribute to understanding the ambient contributions, chemical characteristics, and environmental effects of urban-lifestyle SOA.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Jingchuan Chen, Zhijun Wu, Xiangxinyue Meng, Cuiqi Zhang, Jie Chen, Yanting Qiu, Li Chen, Xin Fang, Yuanyuan Wang, Yinxiao Zhang, Shiyi Chen, Jian Gao, Weijun Li, Min Hu
Summary: This study investigated the ice nucleation properties of Asian dust and found that anthropogenic pollution does not significantly change the ice nucleation activity (INA) of Asian dust.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Yanting Qiu, Zhijun Wu, Ruiqi Man, Taomou Zong, Yuechen Liu, Xiangxinyue Meng, Jingchuan Chen, Shiyi Chen, Suxia Yang, Bin Yuan, Mijung Song, Changhyuk Kim, Junyoung Ahn, Limin Zeng, Jiyi Lee, Min Hu
Summary: This study aimed to understand haze formation in East Asia during winter by measuring the aerosol composition in Beijing and Seoul. The results showed similar pollution situations, with nitrate dominating the inorganic components in both cities. The study emphasized the importance of local secondary aerosol formation for atmospheric PM pollution in East Asian megacities.
ATMOSPHERIC ENVIRONMENT
(2023)
Article
Environmental Sciences
Yujue Wang, Zeyu Feng, Qi Yuan, Dongjie Shang, Yuan Fang, Song Guo, Zhijun Wu, Chao Zhang, Yang Gao, Xiaohong Yao, Huiwang Gao, Min Hu
Summary: This study conducted a comparative investigation to illustrate the sources and key environmental factors of WSOC formation under different atmospheric conditions. The results obtained from five field campaigns at different inland sites and a coastal site during different seasons were summarized. The formation of WSOC was influenced by atmospheric oxidants, aerosol liquid water, and ambient relative humidity, with their roles varying in different atmospheres.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Lizi Tang, Min Hu, Dongjie Shang, Xin Fang, Jianjiong Mao, Wanyun Xu, Jiacheng Zhou, Weixiong Zhao, Yaru Wang, Chong Zhang, Yingjie Zhang, Jianlin Hu, Limin Zeng, Chunxiang Ye, Song Guo, Zhijun Wu
Summary: This study conducted intensive measurements at Nam Co station on the Tibetan Plateau and found that new particle formation events were frequent during the summer monsoon season, mostly driven by organic involvement in the nucleation process. The occurrence of new particle formation events was limited during the pre-monsoon season compared to the monsoon season. These results emphasize the importance of considering the seasonal effect of new particle formation when simulating aerosol and cloud condensation nuclei quantities in the high-altitude atmosphere.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Meteorology & Atmospheric Sciences
Yan Zheng, Ruqian Miao, Qi Zhang, Yaowei Li, Xi Cheng, Keren Liao, Theodore K. Koenig, Yanli Ge, Lizi Tang, Dongjie Shang, Min Hu, Shiyi Chen, Qi Chen
Summary: The chemical differences between submicron (PM1) and fine particles (PM2.5) contribute to different adverse health effects, emphasizing the need for understanding their size-resolved composition. Extensive online measurements in Beijing across seasons revealed that traffic- and cooking-related organic aerosols (OA) accounted for 20%-30% of PM2.5 OA mass, with insignificant variations throughout the year. Secondary OA factors contributed 59%-73% of PM2.5 OA mass. The mass distributions of particulate components varied greatly between PM1 and PM2.5 and across seasons. Heterogeneous uptake and aqueous processing played important roles in distributing secondary organic aerosols in the supermicron mode in polluted areas.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2023)
Article
Geosciences, Multidisciplinary
Y. C. Liu, Z. J. Wu, Y. T. Qiu, P. Tian, Q. Liu, Y. Chen, M. Song, M. Hu
Summary: This study explores the relationship between the mass fraction of inorganic compounds and the liquid-phase-transition threshold relative humidity (RHthreshold) in urban aerosol particles. The results reveal a negative correlation between RHthreshold and the mass fraction of nitrate, suggesting that higher nitrate content leads to a lower RHthreshold. Furthermore, it is observed that an increased nitrate fraction allows particles to exist in a liquid state at lower RH, potentially playing a significant role in the formation of secondary aerosols through multiphase reactions.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Environmental Sciences
Yun Lin, Yuan Wang, Bowen Pan, Jiaxi Hu, Song Guo, Misti Levy Zamora, Pengfei Tian, Qiong Su, Yuemeng Ji, Jiayun Zhao, Mario Gomez-Hernandez, Min Hu, Renyi Zhang
Summary: This study investigates severe regional haze events in Northern China, identifying the complex interplay between primary emissions, secondary formation, and conducive meteorological conditions. The study finds that the interaction between aerosols and the planetary boundary layer leads to the amplification of haze severity on the ground level. The study also highlights the importance of reducing black carbon emissions to improve air quality and mitigate the positive radiative forcing.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2022)
