Article
Environmental Sciences
Eunhye Kim, Byeong-Uk Kim, Hyun Cheol Kim, Soontae Kim
Summary: This study found significant impacts of NH3 emissions from upwind and downwind areas on PM2.5 concentrations in Northeast Asia, especially in spring and winter, through simulations.
ENVIRONMENTAL POLLUTION
(2021)
Article
Environmental Sciences
Jin Zhuang, Hongjian Bai, Jian Sun, Ting Zhang, Jingjing Li, Yanjun Chen, Haiyan Zhang, Qian Sun
Summary: Due to rapid economic development and industrialization, most cities in China are facing severe air pollution issues, particularly the impact of PM2.5 on respiratory infections. The study shows that PM2.5 is positively correlated with hospitalizations for total ALRIs, CAP, AECOPD, and AECB, with stronger associations in females, the elderly, and the cold season.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Geosciences, Multidisciplinary
Lei Wang, Jiarong Deng, Lijin Yang, Tianrun Yu, Yunlong Yao, Dawei Xu
Summary: The study analyzed air quality data in Harbin from 2015 to 2017, indicating that the main pollutants in winter were SO2, NO2, PM10, and PM2.5. The research also highlighted a clear deterioration in air pollution from November to March, with haze events closely linked to straw burning pollutants in the vicinity.
Article
Multidisciplinary Sciences
Myung-Il Jung, Seok-Woo Son, Hyemi Kim, Deliang Chen
Summary: Understanding air pollution in East Asia is crucial due to its high population density and severe winter pollution. This study reveals that the day-to-day variability of air pollution in East Asia during winter is influenced by the Madden-Julian Oscillation (MJO), a dominant subseasonal variability in the tropics. The concentration of PM10 significantly increases during suppressed tropical convections over the Indian Ocean (MJO phase 5-6) and decreases during enhanced convections (MJO phase 1-2).
NATURE COMMUNICATIONS
(2022)
Article
Environmental Sciences
Haijun Zhou, Tao Liu, Bing Sun, Yongli Tian, Xingjun Zhou, Feng Hao, Xi Chun, Zhiqiang Wan, Peng Liu, Jingwen Wang, Dagula Du
Summary: This study conducted offline measurements in Hohhot, a semi-arid city in northern China, to reveal the driving factors of severe air pollution and assess the impact of COVID-19 lockdown measures on PM2.5 chemical characteristics and sources. The results showed that coal combustion, vehicular emission, crustal source, and secondary inorganic aerosols were the main sources of PM2.5 in Hohhot. The lockdown measures led to a reduction in vehicular emission contribution and an increase in secondary inorganic aerosol contribution.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2022)
Article
Environmental Sciences
Xipeng Jin, Xuhui Cai, Mingyuan Yu, Yu Song, Xuesong Wang, Hongsheng Zhang, Tong Zhu
Summary: This study reveals the mesoscale PBL structures and emphasizes the role of atmospheric internal boundaries in regulating PBL structures and shaping PM2.5 pollution patterns in the North China Plain during autumn and winter.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2022)
Article
Multidisciplinary Sciences
Nan Wang, Xin Huang, Jiawei Xu, Tong Wang, Zhe-Min Tan, Aijun Ding
Summary: In the Northwestern Pacific region, typhoons may intensify the chemical interactions between anthropogenic and biogenic emissions, resulting in extreme ozone pollution in major city clusters in China. Biogenic emissions and cross-regional ozone transport are greatly enhanced as typhoons approach, leading to a more than doubled ozone formation efficiency.
Article
Environmental Sciences
Zhiguo Kang, Pengkun Ma, Jiannong Quan, Xingcan Jia, Zhiheng Liao, Zhigang Cheng, Qianqian Wang, Lindong Dai, Xiujuan Zhao, Ziyin Zhang, Tie Yuan, Yubing Pan
Summary: Through observations, it was found that regionally transported refractory black carbon (rBC) is an important source of rBC in the upper atmosphere over Beijing. During periods of strong regional transport, the mass concentration of rBC increased from 1.0 µg/m³ to 4.6 µg/m³, but decreased to 1.8 µg/m³ when regional transport weakened. Further analysis revealed that the transported rBC particles were highly aged, with enhanced light absorbing capacity, which may contribute to weakening atmospheric diffusion and aggravating surface haze pollution.
ATMOSPHERIC ENVIRONMENT
(2023)
Article
Marine & Freshwater Biology
Jue Li, Lulu Qiao, Yi Zhong, Wenjing Xue, Hongda Yang
Summary: This study confirmed the existence of cross-shelf transport off northern Taiwan through remote sensing data and heat flux data, which can be categorized into cold eddy and cold water tongue patterns. Topographic changes and the presence of a thermal front are important factors in inducing cross-shelf transport. Strong winds and typhoons can also enhance cross-shelf transport.
ESTUARINE COASTAL AND SHELF SCIENCE
(2023)
Article
Environmental Sciences
Zhicong Yin, Mingkeng Duan, Yuyan Li, Tianbao Xu, Huijun Wang
Summary: This study analyzed the contributions of emission predictors and climate variability to seasonal prediction of PM2.5 concentration in the east of China and developed a model for winter PM2.5 concentration prediction. The model showed high accuracy and robustness in cross-validation and independent tests and successfully reproduced the significant decrease in PM2.5 concentration resulting from strict emission control measures in recent years.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2022)
Article
Environmental Sciences
Jianlei Lang, Xiaoyu Liang, Shengyue Li, Ying Zhou, Dongsheng Chen, Yanyun Zhang, Lanting Xu
Summary: This study quantitatively evaluated the impact of vehicular emissions on air pollution in the Beijing-Tianjin-Hebei region of China in 2014. It found that vehicular emissions can significantly influence air quality through regional transmission, especially during haze days. The study also highlighted the importance of controlling non-local vehicular emissions for mitigating pollution in the region.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Chenkai Zhao, Qidian Li, Zhongming Cui, JunLong Wang, Li Sun, Yan Yin
Summary: This study evaluated the impact of PM2.5 on ED admissions for circulatory system diseases in Northeast China, finding significant acute, lag, cumulative, and harvesting effects of PM2.5 and its association with the risk of ED admissions for conditions like hypertension, IHD, arrhythmia, HF, and CVE. Air quality management needs to be strengthened to address these issues.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Engineering, Environmental
Cheng Huang, Jingyu An, Hongli Wang, Qizhen Liu, Junjie Tian, Qian Wang, Qingyao Hu, Rusha Yan, Yin Shen, Yusen Duan, Qingyan Fu, Jiandong Shen, Hui Ye, Ming Wang, Chong Wei, Yafang Cheng, Hang Su
Summary: The COVID-19 pandemic led to significant reductions in air pollutants and CO2 emissions in eastern China, with reductions dominated by power and heavy industry sectors for SO2 and CO2, and by mobile sources and light industry sectors for NOx and NMVOCs, respectively. Differentiated emission control strategies should be implemented for various source categories to achieve coordinated reduction goals.
ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS
(2021)
Article
Environmental Sciences
Anqi Shan, Xi Chen, Xueli Yang, Baoqun Yao, Fengchao Liang, Ze Yang, Fangchao Liu, Song Chen, Xiaochang Yan, Jianfeng Huang, Shaoye Bo, Nai-Jun Tang, Dongfeng Gu, Hua Yan
Summary: The study found that long-term exposure to high levels of PM2.5 was associated with an increased risk of diabetic retinopathy among rural diabetic patients in China, with a stronger effect observed in participants who reported alcohol consumption.
ENVIRONMENT INTERNATIONAL
(2021)
Article
Environmental Sciences
Yuefeng Zhao, Yujie Wang, Xiaojie Zhang, Jing Fang, Pengbo Song
Summary: A comprehensive study was conducted to investigate the formation process of winter haze pollution in Jinan, China, using ground and satellite observation data from January 2 to January 13, 2022. Three haze pollution events were identified during this period, with event 2 lasting longer and exhibiting a cumulative growth state. The combination of local and nearby pollutant emissions was the main cause of this event. Weather factors such as lower wind speeds, stable inversion layer, and higher relative humidity contributed to pollution accumulation and haze event formations. The study's results provide important insights into the formation of haze pollution in Jinan and can aid in regional climate change research and government efforts to prevent and control haze pollution in eastern China.
Article
Environmental Sciences
Qian Ye, Jie Li, Xiao Tang, Xueshun Chen, Lei Kong, Huansheng Chen, Wenyi Yang, Huiyun Du, Xiaole Pan, Wei Wang, Lili Zhu, Jianjun Li, Zhe Wang, Yele Sun, Lanzhong Liu, Junji Cao, Zifa Wang
Summary: The uncertainty in the quantitative estimates of long-range transport of pollutants in air quality models is large. This study aims to assess the impact of uncertainties in input parameters on the model estimates using the GNAQPMS-SM model and Latin hypercube sampling method. The uncertainties of input parameters are reasonably quantified and the multiple linear regression method is used to fit ensemble simulation results, providing more accurate estimates of pollutant transport.
ATMOSPHERIC ENVIRONMENT
(2023)
Article
Environmental Sciences
Yafei Liu, Peipei Qiu, Kai Xu, Chenlu Li, Shijie Yin, Yunjun Zhang, Yu Ding, Chen Zhang, Zheng Wang, Ruixiao Zhai, Yijun Deng, Fengyu Yan, Wenjie Zhang, Zhigang Xue, Yele Sun, Dongsheng Ji, Jie Lie, Jing Chen, Hezhong Tian, Xingang Liu, Yuanhang Zhang
Summary: Long-term continuous hourly measurements of ambient volatile organic compounds (VOCs) were conducted in heavily polluted areas of China. The study found that industrial emissions were the main source of VOCs, particularly from the coking industry. Controlling VOC emissions can effectively mitigate ozone (O3) pollution in the region.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Environmental Sciences
Xiaoyong Liu, Jiqiang Niu, Zifa Wang, Xiaole Pan, Fangcheng Su, Dan Yao, Ming Zhu, Jun Yan, Junhui Yan, Gaowei Yao
Summary: Due to anthropogenic emission reductions, the mass concentration of fine particulate matter (PM2.5) in China has significantly decreased in recent years. This study focused on the Huaihe River Basin (HRB) in China to investigate the reasons behind this decrease. The results showed that meteorological conditions and emission reductions both played a positive role in the decrease of PM2.5 concentration in the HRB, with contributions of 30.09% and 69.91% respectively. It was suggested that more efforts should be made to control NO2 emissions in the HRB to further reduce PM2.5.
ATMOSPHERIC POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Xuefeng Yao, Baozhu Ge, Aibing Li, Guanjun Chen, Fan Fan, Danhui Xu, Yuge Wang, Xiao Tang, Lei Kong, Zifa Wang
Summary: Due to differences in topography, water vapor distribution, and emission structures, air pollution in Xinjiang exhibits remarkable spatial heterogeneity. The region is divided into four areas: a clean area in the north, a heavily polluted area in the Urumqi-Changji-Shihezi region, a moderately polluted area in the north of southern Xinjiang, and a severely polluted area in the south of southern Xinjiang. The study reveals that air pollution in typical regions of Xinjiang has become more severe in recent years, highlighting the growing importance of pollution prevention and control in the region.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2023)
Article
Environmental Sciences
Qixin Tan, Baozhu Ge, Syuichi Itahashi, Lu Gan, Ying Zhang, Shuyan Xie, Ying Liu, Danhui Xu, Xueshun Chen, Lin Wu, Xiaole Pan, Wei Wang, Jianbin Wu, Jie Li, Junhua Wang, Xiaobin Xu, Joshua S. Fu, Zifa Wang
Summary: This study uses the Nested Air Quality Prediction Modeling System to investigate the effect of typhoon Hagupit on the wet deposition of nitrogen in eastern coastal China. The results reveal an enhancement mechanism of nitrogen deposition related to the 'pumping effect' of the typhoon, where air pollutants are pumped into higher altitudes and deposited via the in-cloud scavenging process. This study updates our understanding of the source-receptor relationship on atmospheric wet deposition caused by tropical cyclones.
ENVIRONMENTAL RESEARCH COMMUNICATIONS
(2023)
Article
Meteorology & Atmospheric Sciences
Ping Li, Siyao Yue, Xiaoyang Yang, Di Liu, Qiang Zhang, Wei Hu, Shengjie Hou, Wanyu Zhao, Hong Ren, Gang Li, Yuanguan Gao, Junjun Deng, Qiaorong Xie, Yele Sun, Zifa Wang, Pingqing Fu
Summary: This study collected PM2.5 samples over a one-year period at the Shangdianzi station in North China to analyze its chemical and optical characteristics. The major chemical components of PM2.5 were identified, and the sources of water-soluble organic matter and water-insoluble organic matter were determined. Additionally, different types of fluorescent components were identified and their intensity varied with seasons, indicating the main impact of burning sources. This study provides insights into the chemical and optical characteristics of ambient aerosols in the background atmosphere.
ADVANCES IN ATMOSPHERIC SCIENCES
(2023)
Review
Meteorology & Atmospheric Sciences
Tong Zhu, Mingjin Tang, Meng Gao, Xinhui Bi, Junji Cao, Huizheng Che, Jianmin Chen, Aijun Ding, Pingqing Fu, Jian Gao, Yang Gao, Maofa Ge, Xinlei Ge, Zhiwei Han, Hong He, Ru-Jin Huang, Xin Huang, Hong Liao, Cheng Liu, Huan Liu, Jianguo Liu, Shaw Chen Liu, Keding Lu, Qingxin Ma, Wei Nie, Min Shao, Yu Song, Yele Sun, Xiao Tang, Tao Wang, Tijian Wang, Weigang Wang, Xuemei Wang, Zifa Wang, Yan Yin, Qiang Zhang, Weijun Zhang, Yanlin Zhang, Yunhong Zhang, Yu Zhao, Mei Zheng, Bin Zhu, Jiang Zhu
Summary: In the past 25 years, atmospheric chemistry research in China has grown rapidly, focusing on the concept of air pollution complexity. Over 24,000 papers on air pollution, authored or co-authored by Chinese scientists, were published in 2021. This paper reviews representative studies on various aspects of atmospheric chemistry in China, providing a starting point for understanding the field. The advances discussed in this paper have established a theoretical framework for air pollution, supported effective air pollution control policies in China, and created opportunities for education and career development.
ADVANCES IN ATMOSPHERIC SCIENCES
(2023)
Article
Environmental Sciences
Zhijie Li, Weiqi Xu, Wei Zhou, Lu Lei, Jiaxing Sun, Bo You, Zifa Wang, Yele Sun
Summary: This study investigates the chemical differences between submicron aerosol (PM1) species and fine particles (PM2.5) in Beijing, China, using a high-resolution AMS and a time-of-flight ACSM. The results show that aerosol species in PM2.5 are highly correlated with those in PM1, but the PM1/PM2.5 ratios vary greatly for different species. Nitrate is dominant in PM1, while a significant fraction of sulfate is observed in the PM1-2.5 range. PM1 organics show higher fractions in PM2.5 in summer. The study also compares the source apportionment of organic aerosol (OA) between PM1 and PM2.5, revealing substantial differences in primary and secondary OA composition, especially in winter. Additionally, a parameterized relationship between oxygen-to-carbon ratio and CV f44 is developed, which has implications for studying the oxidation and hygroscopicity properties of OA.
ATMOSPHERIC 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
Yuting Zhang, Hang Liu, Shandong Lei, Aodong Du, Weijie Yao, Yu Tian, Yele Sun, Jinyuan Xin, Jie Li, Junji Cao, Zifa Wang, Xiaole Pan
Summary: This study investigated the aerodynamic size-resolved mixing state of refractory black carbon aerosols (rBC) in Beijing during the Olympics using a novel tandem system. The results showed that rBC particles with different diameters had different morphology, coating thickness, and optical properties, and their distribution patterns were influenced by emission scenarios and regional transport.
ATMOSPHERIC ENVIRONMENT
(2023)
Article
Meteorology & Atmospheric Sciences
Danjie Jia, Jinyuan Xin, Zifa Wang, Weifeng Wang, Xiaoyuan Wang, Hang Xiao, Cheng Liu, Jun Zhou, Lei Tong, Yele Sun, Yongjing Ma, Dandan Zhao, Fangkun Wu, Lili Wang
Summary: The study observed the high-resolution dynamic, thermal, and material structures of sea-land breeze circulation (SLB) at the Ningbo coast in the East China Sea. SLB occurred more frequently in spring than in winter, with the horizontal wind speed generally less than 8 m/s and the vertical wind speed less than 0.17 m/s. The circulation heights and dominant heights of sea and land breezes varied between winter and spring. The development of SLB in winter showed distinct differences compared to spring, with a shorter transition process and lower turbulent kinetic energy.
ATMOSPHERIC RESEARCH
(2023)
Article
Environmental Sciences
Zijun Zhang, Yele Sun, Jie Li
Summary: Using Gas Chromatography-Mass Spectrometry, we conducted one-year measurements of volatile organic compounds (VOCs) in a coastal city in eastern China during 2021-2022. The results showed seasonal variations in VOC concentrations, with the highest levels in winter and the lowest in autumn. Alkanes were the dominant VOCs, while aromatics contributed significantly to the formation of secondary organic aerosol (SOA). Industrial production and fuel combustion were the main sources of VOCs, especially in winter, while secondary formation was dominant in summer and autumn. VOC control faces challenges in autumn and winter due to regional transport.
SCIENCE OF THE TOTAL ENVIRONMENT
(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)