Article
Environmental Sciences
Chuanru Zhou, Zexia Duan, Xinfeng Ling, Yuanjian Yang
Summary: Compared to urban areas, there is limited research on air pollution-surface energy budget interactions in farmland regions. A field experiment was conducted in eastern China to investigate the influence of local aerosol and transported dust pollution on the surface energy balance over farmland. The study found that during heavy pollution episodes, there were decreases in shortwave radiation and increases in longwave radiation, resulting in a reduction in net radiation and changes in the surface energy budget. Additionally, the presence of pollution led to lower sensible and latent heat fluxes and an increase in the daytime Bowen ratio.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2023)
Article
Environmental Sciences
Faeze Khademi, Ali Bayat
Summary: The study found that in the atmosphere of Kuwait City, as PLDR increases, SSA and the contribution of coarse-mode particles also increase. The incidence rate of pure and polluted dust varies significantly with the seasons, with over 85% occurring from March to October. The annual average incidence rate of dust-free pollution aerosols is 15%, with SA constituting about 40% in the cold months.
ATMOSPHERIC ENVIRONMENT
(2021)
Article
Geosciences, Multidisciplinary
David M. Romps, Katie Latimer, Qindan Zhu, Tina Jurkat-Witschas, Christoph Mahnke, Thara Prabhakaran, Ralf Weigel, Manfred Wendisch
Summary: According to the aerosol invigoration hypothesis, higher aerosol concentrations in polluted air contribute to stronger storms. The warm-phase invigoration theory suggests that polluted cloudy updrafts condense water vapor onto liquid drops more easily, leading to faster release of latent heat and thus higher buoyancies and updraft speeds. However, in situ observations of warm-phase cloudy updrafts over the Amazon indicate that typical water-vapor supersaturations are around 0.2%, significantly lower than the required values for warm-phase invigoration to have a meaningful impact.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Environmental Sciences
Minghui Tao, Lu Gui, Rong Li, Lili Wang, Shengwen Liang, Qijie Li, Lunche Wang, Chao Yu, Liangfu Chen
Summary: Based on integrated satellite and ground observations, this study provides a comprehensive insight into the sources, transport process, and potential influence of prevalent dust particles in central China during October 2020. The research reveals that dust sources are active during fall, with thick dust layers being carried by predominant northwestern winds to northern China and even the Sichuan Basin. The slow dust-pollution mixing process in central China can last for as long as 3-4 days due to temperature inversion, highlighting the importance of paying attention to these unnoticeable but frequent dust plumes in regional atmospheric environment and climate effects.
ATMOSPHERIC ENVIRONMENT
(2021)
Article
Green & Sustainable Science & Technology
Shi Chen, Xi Lu, Chris P. Nielsen, Guannan Geng, Kebin He, Michael B. McElroy, Shuxiao Wang, Jiming Hao
Summary: This study examines the impact of air pollution control policies and meteorological conditions on photovoltaic power output in China. The results show that the benefits of air pollution control measures have been partially offset by unfavorable meteorological conditions. More stringent air quality targets could reduce the demand for photovoltaic installed capacity needed to meet carbon-neutrality goals by 2060.
Article
Environmental Sciences
Xiaoguang Sun, Xuehua Fan, Tianle Zhang, Yinan Wang, Yuntao Wang, Daren Lyu, Mei Zheng
Summary: The Taklamakan Desert and the Gobi Desert are the second-largest sources of dust in the world. Two dust events in March 2021, induced by the Mongolian cyclone, were studied using satellite remote sensing data, ground-based observations, meteorological data, and trajectory simulations. The study revealed the transport pathways and three-dimensional structure characteristics of the dust aerosols during the events.
Article
Meteorology & Atmospheric Sciences
Man Yue, Xinyi Dong, Minghuai Wang, Louisa K. Emmons, Yuan Liang, Dan Tong, Yawen Liu, Yaman Liu
Summary: Air pollution modeling in East Asia using a variable-resolution global model shows that a finer grid resolution leads to better simulation of haze events and surface ozone, with the ability to capture detailed chemical processes. Analysis also reveals the impact of black carbon aerosols on the planetary boundary layer height and PM2.5 concentration, with deficiencies in the simulation using a coarser grid resolution.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2023)
Article
Geosciences, Multidisciplinary
Mischa Aeschlimann, Guangyu Li, Zamin A. Kanji, Denise M. Mitrano
Summary: Microplastics and nanoplastics may affect cloud formation processes by acting as ice-nucleating particles and cloud condensation nuclei.
Article
Environmental Sciences
Siyu Chen, Hongru Bi, Renhe Zhang, Yong Wang, Jianping Guo, Dan Zhao, Yu Chen, Yawen Guan, Zhaoyang Xie
Summary: Dust-cloud-surface radiation interactions have complex nonlinear effects on surface albedo. An analysis of a snow event in Urumqi, China, revealed that both the interaction between dust and clouds and dust deposition on snow contributed to a decrease in snow albedo. This study highlighted the importance of considering the comprehensive effect of dust-cloud-radiation interactions in future research.
ENVIRONMENTAL RESEARCH LETTERS
(2022)
Article
Environmental Sciences
Rong Tian, Xiaoyan Ma, Jianqi Zhao
Summary: Mineral dust plays a significant role in climate change and air quality, but there are still challenges in predicting dust emissions. This study used an improved model to conduct sensitivity simulations, showing that the updated model can more accurately simulate threshold friction velocities and PM10 mass concentrations, improving the model performance.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2021)
Article
Environmental Sciences
Jinlan Li, Ying Li
Summary: This study quantified and compared the impact of organic carbon (OC) and black carbon (BC) aerosols on ozone concentrations. The results showed that the API effect of OC was 35%-120% of BC's API effect on surface ozone. Despite having a lower light absorption rate, OC's higher portion in the atmosphere and higher absorption efficiency compensate for it, resulting in larger ozone changes in the low troposphere and surface.
ATMOSPHERIC ENVIRONMENT
(2023)
Article
Geosciences, Multidisciplinary
Haichao Wang, Haolin Wang, Xiao Lu, Keding Lu, Lin Zhang, Yee Jun Tham, Zongbo Shi, Kenneth Aikin, Shaojia Fan, Steven S. Brown, Yuanhang Zhang
Summary: Measurements have shown that nighttime production of atmospheric nitrate radicals increased significantly in China from 2014 to 2019, while it decreased in the United States and the European Union. This indicates a growing contribution of nighttime atmospheric oxidation to air pollution in China. Understanding the trends and implications of nitrate radicals is crucial for developing effective pollution mitigation strategies and understanding the impact of nitrogen oxides on climate.
Article
Environmental Sciences
Gang Liu, Xueyuan Wang, Qigang Wu, Dexian Fang, Zheng Wu, Hongnian Liu, Mengyao Lyu
Summary: This study assesses the impact of urbanization on gust wind speed in Nanjing, China using the Weather Research and Forecasting (WRF) model. The results show that while mean wind speed decreases, gust wind speed increases significantly in urban areas due to enhanced friction velocity and less atmospheric stability caused by urbanization, especially during nighttime.
ENVIRONMENTAL RESEARCH LETTERS
(2023)
Article
Environmental Sciences
Zhongjing Jiang, Jing Li, Xiao Lu, Cheng Gong, Lin Zhang, Hong Liao
Summary: The study reveals that surface ozone pollution in eastern China during summer is significantly influenced by the variability of the Western Pacific Subtropical High (WPSH), impacting the ozone concentrations in different regions. Chemistry plays a decisive role in leading the ozone changes among processes, with natural emissions from biogenic and soil sources accounting for around 30% of the total surface ozone changes.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2021)
Article
Environmental Sciences
Tong Yang, Xiaoyan Ma, Jianqi Zhao
Summary: We investigated the long-term variability of aerosols and clouds over Eastern China using ground-based data and satellite retrievals. Our study found a significant shift in visibility and cloud fraction over the study period, with different patterns in the Beijing-Tianjin-Hebei and Yangtze River Delta regions. The relationship between cloud fraction and visibility weakened in recent years, possibly influenced by various factors. Further studies are needed to understand the extent to which aerosols contribute to changes in cloudiness.
ATMOSPHERIC ENVIRONMENT
(2023)
Article
Engineering, Environmental
Teng Wang, Baojie Li, Tao Huang, Wanyanhan Jiang, Yang Yang, Hong Liao
Summary: The Yangtze River Delta, especially Jiangsu and Shanghai, suffers from severe atmospheric PAH pollution. The concentration of BaP in the atmosphere showed an increasing and then decreasing trend from 2001 to 2016, with the highest level in 2005. The proportion of BaP exceeding the national standard was highest during winter in Jiangsu. The lung cancer risk in the Yangtze River Delta varied widely from 2001 to 2016, with a decrease in excess lung cancer cases compared to 2005.
ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
(2023)
Article
Environmental Sciences
Fengyi Chang, Jiandong Li, Nan Li, Hong Liao
Summary: We used the WRF-Chem model to simulate a stratospheric intrusion (SI) event in eastern China and investigate its impact on near-surface O3 pollution. The large-scale circulation of SI was characterized by a deep trough over central China, South Asia high, and Western Pacific Subtropical high. The results showed that SI contributed up to 6.5 ppb to the surface O3 concentration, mainly through horizontal advection. The study highlights the natural effect of SI on O3 pollution in eastern China and its implications for the development of an O3 pollution alert system.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2023)
Article
Meteorology & Atmospheric Sciences
Xinyuan Feng, Zhengzi Zhang, Jianping Guo, Shigong Wang
Summary: The Sichuan Basin is one of the most air-polluted areas in China, and this study investigates the formation and evolution of multilayer inversions during persistent heavy pollution events in the region. The results show that over 90% of the events included multilayer inversions, occurring near the ground and at heights of approximately 2000-3800 m above the ground. These inversions were influenced by large-scale pressure patterns and mid-level warm air advection induced by warm high-pressure ridges. Cold advection associated with cold low-pressure troughs played a role in weakening and ending the inversions.
ATMOSPHERIC RESEARCH
(2023)
Article
Geosciences, Multidisciplinary
S. Dasarathy, L. M. Russell, S. D. Rodier, J. S. Bowman
Summary: We evaluated satellite-retrieved marine aerosol in the western Antarctic Peninsula over a 12-year period and found different correlations between coarse-mode aerosol optical depth (AOD(C)) and new marine aerosol optical depth (MAOD) with wind speed and sea surface temperature. Warmer sea surface temperature enhanced the production of sea spray aerosol (SSA).
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Environmental Sciences
Mijie Pang, Jianbing Jin, Arjo Segers, Huiya Jiang, Li Fang, Hai Xiang Lin, Hong Liao
Summary: In 2021 spring, there were recurring super dust storms in East Asia, causing significant health damages and property losses. To minimize the damage and issue early warnings, an accurate dust forecast is crucial. The development of a dust storm forecasting system is introduced by combining a chemical transport model, LOTOS-EUROS, and the Localized EnKF (LEnKF) assimilation approach. Ground-based PM10 measurements from an air quality monitoring network are assimilated, and sequential assimilation tests are conducted. The assimilation-based forecasting system shows better performance in dust forecasting compared to the model-only forecast, as validated by independent MODIS aerosol optical depth (AOD) data. The implementation of LEnKF, with the benefit of localization, improves the resolution of PM10 measurements with limited ensemble members and exhibits superior performance.
ATMOSPHERIC ENVIRONMENT
(2023)
Article
Environmental Sciences
Su Li, Yang Yang, Hailong Wang, Pengwei Li, Ke Li, Lili Ren, Pinya Wang, Baojie Li, Yuhao Mao, Hong Liao
Summary: Observations show that tropospheric ozone (O3) concentrations in Southeast Asia have been increasing rapidly since the 1990s. This study uses a modeling technique to quantify the contributions of different regions and emission sectors to the increase in O3 concentrations. The results indicate that the increase in local NOx emissions dominates the trend of O3 concentration in Southeast Asia, and ground transportation is the largest contributor to the rapid increase.
ATMOSPHERIC ENVIRONMENT
(2023)
Article
Biochemistry & Molecular Biology
Yu Liang, Hong Liao, Xuanni Chen, Qiwei Wang, Qin Li, Yong Shen, Yuyi Zheng, Xiao-Nian Li, Hucheng Zhu, Dongyan Li, Weiguang Sun, Chunmei Chen, Yonghui Zhang
Summary: Five new cyclopiazonic acid related indole alkaloids, pegriseofamines A-E (1-5), were isolated from Penicillium griseofulvum fungus. Their structures and configurations were determined using various techniques. Pegriseofamine A (1) possesses a unique tetracyclic ring system and its biosynthetic origin was discussed. Compound 4 showed potential in relieving liver injury and preventing hepatocyte apoptosis in autoimmune liver disease induced by ConA.
BIOORGANIC CHEMISTRY
(2023)
Article
Environmental Sciences
Boming Liu, Xin Ma, Jianping Guo, Hui Li, Shikuan Jin, Yingying Ma, Wei Gong
Summary: Accurate estimation of wind speed at wind turbine hub height is important for wind energy assessment and exploitation. The traditional power law method (PLM) can lead to uncertainties, especially under unstable conditions. In this study, a random forest (RF) machine learning algorithm is used to estimate wind speeds at hub heights beyond the traditional limit of 100-120 m. The RF model shows advantages over the PLM model, considering factors such as surface friction and heat transfer. The findings have implications for the wind energy industry.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Environmental Sciences
Veronica Z. Berta, Lynn M. Russell, Derek J. Price, Chia-Li Chen, Alex K. Y. Lee, Patricia K. Quinn, Timothy S. Bates, Thomas G. Bell, Michael J. Behrenfeld
Summary: Amines were measured using AMS and FTIR spectroscopy during the NAAMES cruises. The concentrations of AMS NR amine ion fragments and FTIR NV primary amine groups were higher in continental air masses than in marine air masses. The study identified secondary continental sources for AMS NR amine fragments and a primary marine source for FTIR NV amine groups.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Meteorology & Atmospheric Sciences
Chao Liu, Yang Yang, Hailong Wang, Lili Ren, Jiangfeng Wei, Pinya Wang, Hong Liao
Summary: Since the implementation of the Air Pollution Prevention and Control Action Plan in 2013, aerosol emissions in East Asia have decreased significantly, while emissions in South Asia have continued to increase, resulting in a dipole pattern of aerosol emissions between the two regions. A study investigating the East Asian summer monsoon (EASM) responses to these changes found that the reduction in East Asian emissions alone led to a positive aerosol effective radiative forcing (ERF) and a slight warming in summer. When considering both the emission reductions in East Asia and the increases in South Asia, the ERF and warming over central-eastern China were further enhanced, while the rainfall decreased slightly. Overall, the study highlights the important role of South Asian aerosols in changing the East Asian climate.
JOURNAL OF CLIMATE
(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
Environmental Sciences
Huimin Li, Yang Yang, Jianbing Jin, Hailong Wang, Ke Li, Pinya Wang, Hong Liao
Summary: This study quantifies the impacts of future climate change on ozone (O3) pollution in Asia and predicts near-surface O3 concentrations from 2020 to 2100. The results show that under high-forcing scenarios, O3 concentrations will increase by 5%-20% in South China, Southeast Asia, and South India, and by less than 10% in North China and the Gangetic Plains. Furthermore, the study finds that summertime O3 pollution in eastern China will expand from North China to South China and extend into the cold season in a warmer future.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Environmental Sciences
Huibin Dai, Hong Liao, Ke Li, Xu Yue, Yang Yang, Jia Zhu, Jianbing Jin, Baojie Li, Xingwen Jiang
Summary: Frequent co-polluted days by ozone and PM2.5 were observed in the Beijing-Tianjin-Hebei region from 2013 to 2020. The chemical and physical characteristics of these days were different from those of single ozone or PM2.5 pollution, and they have significant implications for air quality management.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
