Article
Engineering, Environmental
Wenwen Xia, Yong Wang, Siyu Chen, Jianping Huang, Bin Wang, Guang J. Zhang, Yue Zhang, Xiaohong Liu, Jianmin Ma, Peng Gong, Yiquan Jiang, Mingxuan Wu, Jinkai Xue, Linyi Wei, Tinghan Zhang
Summary: The study found that urban anthropogenic dust emissions have a significant impact on urban air pollution globally, especially exacerbating non-dust pollution in India and northern China. The estimated global total premature mortality due to anthropogenic dust is 0.8 million deaths per year, with more severe effects in populous regions.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Environmental Sciences
Yunyan Jiang, Jinyuan Xin, Ying Wang, Guiqian Tang, Yuxin Zhao, Danjie Jia, Dandan Zhao, Meng Wang, Lindong Dai, Lili Wang, Tianxue Wen, Fangkun Wu
Summary: The study revealed significant impacts of synoptic and regional circulations on the PBL structure and air quality, showing that synoptic circulations led to different PBL structures and pollution patterns, while regional breezes played a role in pushing pollution zones to specific locations.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2021)
Article
Environmental Sciences
Dandan Zhao, Jinyuan Xin, Chongshui Gong, Jiannong Quan, Yuesi Wang, Guiqian Tang, Yongxiang Ma, Lindong Dai, Xiaoyan Wu, Guangjing Liu, Yongjing Ma
Summary: This study explores the relationship between PM pollution and ABL structure, finding that ABL structure changes are closely related to PM levels and ARF. The research also identifies for the first time that once the ARF threshold exceeds approximately 55 W m(-2), the ABL structure tends to stabilize.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2021)
Article
Meteorology & Atmospheric Sciences
Xiaolan Li, Yucong Miao, Yanjun Ma, Yangfeng Wang, Yunhai Zhang
Summary: The research found that during the pollution formation period, a strong elevated thermal inversion layer was observed over Shenyang, induced by the large-scale synoptic pattern, which suppressed the boundary layer growth and vertical dispersion of aerosols. Furthermore, the blocking effect of mountains to the east of Shenyang exacerbated the pollution, especially when northwesterly/westerly flows prevailed in shallow boundary layers. Numerical sensitive experiments estimated that around one third of the PM2.5 concentration in Shenyang during January 1-4 was relevant to the terrain effect.
ATMOSPHERIC RESEARCH
(2021)
Article
Environmental Sciences
Qi Yuan, Bing Qi, Deyun Hu, Junjiao Wang, Jian Zhang, Huanqiang Yang, Shanshan Zhang, Lei Liu, Liang Xu, Weijun Li
Summary: Air pollution has become a significant environmental issue in the megacities of eastern China. Controlling air pollution remains challenging, but the COVID-19 lockdown provided valuable insights into pollutant reductions. During the lockdown in Hangzhou, PM2.5, NOx, and CO concentrations decreased, highlighting the potential for future control and forecasting efforts in similar megacities.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Xueliang Deng, Jian Chen, Rui Dai, Zhenfang Zhai, Dongyan He, Liang Zhao, Xiaolong Jin, Jiping Zhang
Summary: The characteristics of the planetary boundary layer (PBL) and its association with air pollution were analyzed in Hefei, China, using reanalysis data, weather observations, and air pollutant measurements from 2016 to 2021. Ground meteorological conditions, such as weak wind speed, northwest wind anomalies, low temperature, and high relative humidity, directly influenced air pollution at the near-surface level. Short-range air masses from the north and northwest played a role in pollutant transport within the PBL, and high PM2.5 concentrations showed a strong dependence on PBL stratification. The stable stratification in the PBL was influenced by ground factors and synoptic configurations, contributing to the generation of air pollution.
Article
Environmental Sciences
Zhaobin Sun, Ling Han, Aijun Ding, Hongnian Liu, Xiujuan Zhao
Summary: Aerosol-PBL interactions can affect aerosol concentration, temperature, and health effects. This study established the relationship between PM2.5, temperature, and mortality using numerical simulation and distributed lag non-linear models. The results show that aerosol-PBL interactions can intensify the health impacts of temperature and PM2.5.
ATMOSPHERIC ENVIRONMENT
(2022)
Article
Business
Alexandre Godzinski, Milena Suarez Castillo
Summary: Air pollution poses a significant threat to human health, with children and elderly individuals being the most vulnerable. Different air pollutants have varying impacts on health, such as ozone and sulfur dioxide increasing respiratory-related emergency admissions, carbon monoxide increasing emergency admissions for cardiovascular diseases, particulate matter increasing cardiovascular mortality rate, and sulfur dioxide increasing respiratory-related mortality rate. Ignoring interrelations between air pollutants could lead to partially false conclusions in analyses.
JOURNAL OF ENVIRONMENTAL ECONOMICS AND MANAGEMENT
(2021)
Article
Environmental Sciences
Yucong Miao, Huizheng Che, Xiaoye Zhang, Shuhua Liu
Summary: The study revealed that heavy pollution events in Beijing and Shanghai are often concurrent due to unfavorable meteorological conditions. In Beijing, heavy pollution occurs on days with shallow afternoon Planetary Boundary Layer (PBL) and southerly/southwesterly prevailing winds, while in Shanghai it occurs on days with deep afternoon PBL and southwesterly warm advections within the PBL.
ENVIRONMENTAL POLLUTION
(2021)
Review
Environmental Sciences
Matthew W. Christensen, Andrew Gettelman, Jan Cermak, Guy Dagan, Michael Diamond, Alyson Douglas, Graham Feingold, Franziska Glassmeier, Tom Goren, Daniel P. Grosvenor, Edward Gryspeerdt, Ralph Kahn, Zhanqing Li, Po-Lun Ma, Florent Malavelle, Isabel L. McCoy, Daniel T. McCoy, Greg McFarquhar, Johannes Mulmenstadt, Sandip Pal, Anna Possner, Adam Povey, Johannes Quaas, Daniel Rosenfeld, Anja Schmidt, Roland Schroedner, Armin Sorooshian, Philip Stier, Velle Toll, Duncan Watson-Parris, Robert Wood, Mingxi Yang, Tianle Yuan
Summary: Aerosol-cloud interactions are the most uncertain driver of radiative forcing due to human activities. Opportunistic experiments provide a way to investigate these interactions and improve assessments of aerosol radiative forcing and climate change.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2022)
Article
Environmental Sciences
Yingying Ma, Ruonan Fan, Shikuan Jin, Xin Ma, Ming Zhang, Wei Gong, Boming Liu, Yifan Shi, Yiqun Zhang, Hui Li
Summary: The study in Wuhan shows that black carbon concentration in the atmosphere varies seasonally, with the highest aerosol optical depth in winter and the highest total aerosol concentration in summer. Under polluted conditions, aerosol and black carbon radiative forcing is strongest in summer, while black carbon radiative forcing is increased in both summer and winter compared to clean-air days. The results highlight the significant impact of particulate air pollution on radiative forcing.
Article
Environmental Sciences
Changqing Lin, Jimmy C. H. Fung, Chao Ren, Edward Y. Y. Ng, Yuguo Li, Yueyang He, Kenneth K. M. Leung, Zhi Ning, Alexis K. H. Lau
Summary: This study uses a Light Detection and Ranging (LiDAR) system to measure wind profiles in an urban site in Hong Kong, and investigates the characteristics of ozone transport in the planetary boundary layer (PBL). The study finds that during ozone pollution episodes, there is increased regional transport from the Greater Bay Area (GBA), resulting in a predominant westerly component in the ozone flux. Additionally, clockwise veering winds are observed from the ground to the top of the PBL.
ATMOSPHERIC ENVIRONMENT
(2023)
Article
Mechanics
Abdelouahab Mohammed-Taifour, Julien Weiss
Summary: Experimental results show that periodic forcing artificially reduces the size of the TSB by moving separation downstream and reattachment upstream. The TSB responds to upstream forcing with a characteristic time scale similar to the breathing motion, supporting a mechanism where low-frequency contraction and expansion is a response to upstream perturbations affecting separation and reattachment positions.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Environmental Sciences
Madina Tursumbayeva, Aiymgul Kerimray, Ferhat Karaca, Didin Agustian Permadi
Summary: Air pollution is a severe problem in Almaty, with high PM2.5 concentrations in the winter months. The pollution is likely caused by emissions from coal combustion and poor atmospheric dispersion. The study shows that variations in the planetary boundary layer height (PBLH) have a significant effect on PM2.5 concentrations throughout the year.
AEROSOL AND AIR QUALITY RESEARCH
(2022)
Article
Environmental Sciences
Jinyuan Xin, Yongjing Ma, Dandan Zhao, Chongshui Gong, Xinbing Ren, Guiqian Tang, Xiangao Xia, Zifa Wang, Junji Cao, Jordi Vila-Guerau de Arellano, Scot T. Martin
Summary: The interaction between aerosols and the planetary boundary layer has a significant impact on urban air quality. This study focused on the complex feedback of aerosols on the Beijing megacity and found notable distinctions in aerosol properties and vertical distributions among different air masses. Aerosols consistently suppressed the daytime convective boundary layer, indicating the potential complexity of aerosol-PBL interactions in future scenarios and other urban regions.
ENVIRONMENTAL POLLUTION
(2023)
Review
Engineering, Environmental
Zhen Cheng, Xinghua Qiu, Xiaodi Shi, Xing Jiang, Tong Zhu
Summary: Ambient air pollution is a significant risk to public health due to the presence of numerous known and unknown compounds. This study reviews the analytical techniques for air pollution, focusing on the omics approach, including sample preparation, analysis, compounds prioritization, and identification. High-resolution mass spectrometry combined with chromatography allows for the digitalization of complex environmental matrices into full-component data. Chemical fingerprints, suspect lists, and biological effects are essential strategies for screening critical and hazardous substances. The omics approach provides a paradigm for discovering emerging air pollutants, but further advancements in instruments and databases are needed to assess the health risks associated with key pollutants.
FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING
(2023)
Article
Meteorology & Atmospheric Sciences
Yan Ren, Hongsheng Zhang, Xiaoye Zhang, Bingui Wu, Xuhui Cai, Yu Song, Tong Zhu
Summary: This study investigates the characteristics of the stable boundary layer (SBL) in haze pollution events using observational data. The study finds that the decoupled SBL dominates in haze pollution events and has notable differences in turbulent structure compared to the coupled SBL. The existence of the decoupled SBL requires further research and attention to improve the accuracy of pollutant concentration forecasting.
ATMOSPHERIC RESEARCH
(2023)
Article
Multidisciplinary Sciences
Xin Huang, Ke Ding, Jingyi Liu, Zilin Wang, Rong Tang, Lian Xue, Haikun Wang, Qiang Zhang, Zhe-Min Tan, Congbin Fu, Steven J. Davis, Meinrat O. Andreae, Aijun Ding
Summary: Extreme wildfires pose threats to human lives, air quality, and ecosystems. The impact of meteorology on wildfire behaviors and the correlation between wildfires and climate are well-studied. However, the influence of fire-weather feedback on short-term wildfire variability remains unclear, hindering fire disaster mitigation. In this study, we demonstrate the dominant role of synoptic-scale feedback in driving extreme fires in Mediterranean and monsoon climate regions. We observed that the radiative effects of smoke aerosols can modify near-surface wind, air dryness, and rainfall, thereby exacerbating air pollution by enhancing fire emissions and weakening dispersion. The complex interactions among wildfires, smoke, and weather create a positive feedback loop that significantly increases air pollution exposure.
Article
Environmental Sciences
Pengfei Li, Jingyi Wu, Mingkun Tong, Jiajianghui Li, Ruohan Wang, Xueqiu Ni, Hong Lu, Jianyu Deng, Siqi Ai, Tao Xue, Tong Zhu
Summary: This study examined the effect of long-term exposure to PM2.5 from different sources on birthweight in low-and middle-income countries. The results showed that exposure to PM2.5 from sources such as international shipping, solvents, agricultural waste burning, road transportation, waste handling and disposal, and windblown dust was significantly associated with a decrease in birthweight. The changes in birthweight varied geographically and were determined by both the concentration and source profile of the PM2.5 mixture.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2023)
Article
Geosciences, Multidisciplinary
Li Luo, Tingting Liao, Xiaoling Zhang, Yunfei Wu, Jiawei Li, Renjian Zhang, Zhenzhen Zheng, Shuh-Ji Kao
Summary: By coupling nitrate dual isotopes with aerosol chemical compositions, this study investigated the size-segregated formation mechanisms of nitrate (NO3-) during winter haze pollution events in Chengdu, China. Different formation pathways were identified for fine particles and coarse particles, with N2O5 hydrolysis, NO3 + VOCs, and NO2 + OH homogeneous reactions being major contributors for fine particle NO3- production, and the reaction between gas-phase HNO3 and CaCO3 dominating coarse particle NO3- formation. This research provides quantitative insights and a better understanding of NO3- formation during haze pollution.
Review
Engineering, Environmental
Bo Peng, Qianli Dong, Fangzhou Li, Teng Wang, Xinghua Qiu, Tong Zhu
Summary: This review summarizes the current knowledge on PAH derivatives in terms of their chemical species, levels, biotransformation patterns, chemical analytical methods, internal exposure routes, and toxicity. It also discusses the challenges and future directions for research in this field.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Green & Sustainable Science & Technology
Yuxuan Zhang, Hang Su, Simonas Kecorius, Nan Ma, Zhibin Wang, Yele Sun, Qiang Zhang, Ulrich Poeschl, Alfred Wiedensohler, Meinrat O. Andreae, Yafang Cheng
Summary: Black carbon aerosols have a significant impact on climate systems, and estimating their radiative effect requires understanding their mixing state and light absorption enhancement from coatings. Observations have shown lower light absorption enhancement factors (Eabs) than expected, leading to a debate on the true magnitude of BC's climate impact. However, considering the presence of extremely low-volatility (eLV) organics in BC coatings, the estimates of Eabs increase substantially. Our results highlight a strong radiative warming effect from atmospheric BC.
Article
Meteorology & Atmospheric Sciences
Anton Rusanen, Kristo Horrak, Lauri R. Ahonen, Tuomo Nieminen, Pasi P. Aalto, Pasi Kolari, Markku Kulmala, Tuukka Petaja, Heikki Junninen
Summary: We introduce SMEARcore, a framework for real-time data analysis and management intended for measurement stations. It allows integration of new SMEAR stations with existing ones and facilitates easier problem diagnosis through robust data pipelines. Unlike previous similar concepts, SMEARcore keeps processing under data owners' control, provides tools for general data interoperability, and is extensible to new instruments. It is meant to supplement existing infrastructures and promote structured data curation in more measurement stations.
ATMOSPHERIC MEASUREMENT TECHNIQUES
(2023)
Article
Environmental Sciences
Meri Raty, Larisa Sogacheva, Helmi-Marja Keskinen, Veli-Matti Kerminen, Tuomo Nieminen, Tuukka Petaja, Ekaterina Ezhova, Markku Kulmala
Summary: Boreal forests in the Northern Hemisphere have a complex interaction with the atmosphere, including a feedback process that may produce a cooling effect through increased cloud reflectance due to aerosol-cloud interactions. This study investigates the impact of the boreal forest environment on cloud-related properties during the growing season. Results show that air masses with longer exposure to the forest have different properties compared to those with shorter land transport times. The study also reveals changes in cloud condensation nuclei concentrations, specific humidity, and precipitation frequency after a certain threshold of land transport time.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Meteorology & Atmospheric Sciences
Jing Cai, Kaspar R. Daellenbach, Cheng Wu, Yan Zheng, Feixue Zheng, Wei Du, Sophie L. Haslett, Qi Chen, Markku Kulmala, Claudia Mohr
Summary: The offline application of FIGAERO-CIMS provides a cost-efficient method to analyze the molecular composition of organic aerosols. This study demonstrates the feasibility of using Teflon and quartz fiber filter samples collected in urban Beijing, with high signal-to-noise ratios, repeatability, and linear signal response. It expands the molecular characterization of organic aerosols by FIGAERO-CIMS to situations where the instrument itself cannot be deployed.
ATMOSPHERIC MEASUREMENT TECHNIQUES
(2023)
Article
Ecology
Matti Kamarainen, Juha-Pekka Tuovinen, Markku Kulmala, Ivan Mammarella, Juha Aalto, Henriikka Vekuri, Annalea Lohila, Anna Lintunen
Summary: In this study, machine learning methods (RF and GB) were used to predict the net ecosystem CO2 exchange (NEE) in a pine-dominated boreal forest in southern Finland over 1996-2018. The results showed that both RF and GB were able to explain the temporal variability of NEE using meteorological predictors, but GB was more accurate.
Article
Environmental Sciences
Lejish Vettikkat, Pasi Miettinen, Angela Buchholz, Pekka Rantala, Hao Yu, Simon Schallhart, Tuukka Petaja, Roger Seco, Elisa Mannisto, Markku Kulmala, Eeva-Stiina Tuittila, Alex B. Guenther, Siegfried Schobesberger
Summary: Wetlands cover a small portion of the land surface but boreal wetlands are experiencing significant warming and emit climate-relevant volatile organic compounds. This study presents the first-ever measurements of terpene emissions from a boreal fen wetland and found that isoprene was the dominant compound emitted. The emissions showed a strong exponential dependence on temperature and were significantly higher than previous estimates.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Environmental Sciences
Shujun Zhong, Shuang Chen, Junjun Deng, Yanbing Fan, Qiang Zhang, Qiaorong Xie, Yulin Qi, Wei Hu, Libin Wu, Xiaodong Li, Chandra Mouli Pavuluri, Jialei Zhu, Xin Wang, Di Liu, Xiaole Pan, Yele Sun, Zifa Wang, Yisheng Xu, Haijie Tong, Hang Su, Yafang Cheng, Kimitaka Kawamura, Pingqing Fu
Summary: Biomass burning is a key source of urban aerosols in the North China Plain, with limited knowledge on the influence of biogenic SOA loading on the molecular composition of wintertime organic aerosols. Water-soluble organic compounds in PM2.5 from urban Tianjin were analyzed, revealing that biomass burning contributes to the majority of CHO and CHON compounds. The chemistry and level of biogenic SOA loading plays a significant role in the formation of secondary compounds, including CHO, CHON, CHOS, and CHONS. The hydrolysis of nitrooxy-organosulfates is identified as a possible pathway for the formation of organosulfates.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Environmental Sciences
Yunfan Liu, Hang Su, Siwen Wang, Chao Wei, Wei Tao, Mira L. Poehlker, Christopher Poehlker, Bruna A. Holanda, Ovid O. Krueger, Thorsten Hoffmann, Manfred Wendisch, Paulo Artaxo, Ulrich Poeschl, Meinrat O. Andreae, Yafang Cheng
Summary: Nucleation and condensation of BVOCs play a crucial role in aerosol formation, but their contribution to upper-tropospheric aerosols is uncertain. In this study, new schemes describing these processes are developed and implemented into the WRF-Chem model. The results show that the new schemes significantly improve the simulation of cloud condensation nuclei (CCN) concentrations in the upper troposphere over the Amazon Basin. The findings highlight the importance of biosphere-atmosphere coupling in regulating upper-tropospheric aerosol concentrations and its potential role in anthropogenic climate change.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Environmental Sciences
Matthew Boyer, Diego Aliaga, Jakob Boyd Pernov, Helene Angot, Lauriane L. J. Quelever, Lubna Dada, Benjamin Heutte, Manuel Dall'Osto, David C. S. Beddows, Zoe Brasseur, Ivo Beck, Silvia Bucci, Marina Duetsch, Andreas Stohl, Tiia Laurila, Eija Asmi, Andreas Massling, Daniel Charles Thomas, Jakob Kleno Nojgaard, Tak Chan, Sangeeta Sharma, Peter Tunved, Radovan Krejci, Hans Christen Hansson, Federico Bianchi, Katrianne Lehtipalo, Alfred Wiedensohler, Kay Weinhold, Markku Kulmala, Tuukka Petaja, Mikko Sipila, Julia Schmale, Tuija Jokinen
Summary: The Arctic environment is undergoing rapid changes due to accelerated warming. This study investigates the annual cycle of aerosol characteristics in the central Arctic Ocean and compares them to land-based sites across the Arctic. The analysis provides important insights into aerosol processes in the changing Arctic environment and their impact on climate change.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
