Article
Environmental Sciences
A. Rathore, G. S. Gopikrishnan, J. Kuttippurath
Summary: At higher concentrations, tropospheric ozone can cause respiratory difficulties, premature human mortality, and harm vegetation. It is produced as a byproduct of chemical reactions involving nitrogen oxides and volatile organic compounds in the presence of sunlight. This study analyzes the trends and effects of tropospheric ozone in India, highlighting its significant increase and impact on regional warming, public health, and ecosystem dynamics.
ATMOSPHERIC ENVIRONMENT
(2023)
Article
Meteorology & Atmospheric Sciences
Yuantao Hu, Qigang Wu, Aixue Hu, Steven Schroeder
Summary: This study shows that ozone changes during 1955-2005 have played a significant role in global and Arctic climate changes. The ozone changes contributed to a considerable amount of global mean surface warming, accounting for roughly 21%, 26%, and 16% of observed, all-forcing, and well-mixed greenhouse gas-driven trends, respectively. In the Arctic, the ozone-driven warming accounted for approximately 48%, 40%, and 25% of the same three trends.
Article
Geosciences, Multidisciplinary
Pengfei Yu, Robert W. Portmann, Yifeng Peng, Cheng-Cheng Liu, Yunqian Zhu, Elizabeth Asher, Zhixuan Bai, Ye Lu, Jianchun Bian, Michael Mills, Anja Schmidt, Karen H. Rosenlof, Owen B. Toon
Summary: Volcanic and wildfire events between 2014 and 2022 injected 3.2 Tg of sulfur dioxide and 0.8 Tg of smoke aerosols into the stratosphere. The simulated stratospheric lifetime of the injections during this period is 50% longer than previous volcanic injections. These injections resulted in a global mean effective radiative forcing of -0.18 W m(-2), which is 40% of the radiative forcing caused by the Pinatubo eruption. The smoke aerosols from wildfires have a greater negative radiative forcing compared to volcanic sulfate.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Engineering, Environmental
Georgios A. Kelesidis, David Neubauer, Liang-Shih Fan, Ulrike Lohmann, Sotiris E. Pratsinis
Summary: The climate models may significantly underestimate the direct radiative forcing impact of black carbon (BC) due to their assumption of spherical BC morphology. However, simulations considering the realistic morphology and coatings of BC reveal high direct radiative forcing in East Asia, South Asia, sub-Saharan Africa, Western Africa, and the Arabian peninsula, indicating a significant regional climate warming contribution solely due to BC emissions.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Environmental Sciences
V. K. Patel, J. Kuttippurath
Summary: This study focuses on the spatial and temporal changes in water vapor over India and the Indian Ocean, and analyzes its impact on regional climate through radiative effects. The results show an increasing trend in water vapor content in the region, which could affect the temperature and climate.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Christina-Anna Papanikolaou, Panagiotis Kokkalis, Ourania Soupiona, Stavros Solomos, Alexandros Papayannis, Maria Mylonaki, Dimitra Anagnou, Romanos Foskinis, Marilena Gidarakou
Summary: In this study, the aerosol optical properties and radiative forcing of the tropospheric and stratospheric smoke layers during the Australian biomass burning event in 2019-2020 were analyzed using satellite observations. The smoke layers were trapped within the Andes circulation and exhibited different optical properties and radiative effects.
Article
Meteorology & Atmospheric Sciences
An Qi, Hua Zhang, Shuyun Zhao, Tijian Wang, Qianxia Liu, Zaizhi Wang, Sunling Gong, Bing Xie, Yi Liu
Summary: This study evaluates the performance of a newly developed atmospheric chemistry-climate model in determining past and future tropospheric ozone levels. The model is able to reproduce the distribution and seasonal changes of tropospheric ozone in 2010 and shows an increase in ozone burden in China. In the future, tropospheric ozone burden is projected to decrease globally but increase in South Asia and Africa.
JOURNAL OF METEOROLOGICAL RESEARCH
(2022)
Article
Engineering, Environmental
Jiao Du, Jianmin Ma, Tao Huang, Junfeng Liu, Lulu Lian, Shu Tao, Jinmu Luo, Shuxin Ma, Hong Gao, Ningyi Jia, Chaoran Xie, Yuan Zhao, Xinrui Liu
Summary: The global supply chain relocation from high-latitude Europe to low mid-latitude Asian countries significantly reduces the burden of black carbon and snow albedo radiative forcing in the Arctic. The relocation leads to a 15% decrease in black carbon concentration in the Arctic, a 7% decline in total net black carbon level across the Arctic, and a 16% decrease in the European Arctic.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Environmental Sciences
E. X. Bonilla, L. J. Mickley, E. G. Beaudon, L. G. Thompson, W. E. Rodriguez, R. Cruz Encarnacion, C. A. Whicker, M. G. Flanner, C. G. Schmitt, P. Ginot
Summary: Andean glaciers have been melting rapidly since the 1960s, with black carbon deposition from fires in the Amazon Basin and other areas potentially playing a role in this melting by reducing the surface albedo. Through modeling and observations, this study found that the deposition of smoke black carbon on snow in the Andes could lead to significant climate impacts in terms of radiative forcing and albedo reduction.
ENVIRONMENTAL RESEARCH LETTERS
(2023)
Article
Multidisciplinary Sciences
Yunpeng Qiu, Lijin Guo, Xinyu Xu, Lin Zhang, Kangcheng Zhang, Mengfei Chen, Yexin Zhao, Kent O. Burkey, H. David Shew, Richard W. Zobel, Yi Zhang, Shuijin Hu
Summary: Climate warming and elevated ozone have tradeoffs between plant roots and symbiotic fungi, promoting organic carbon decomposition in a soybean agroecosystem. They reduce root biomass and colonization, but increase specific root length and shift AMF community composition, providing insights into plant-microbial responses to climate change.
Article
Environmental Sciences
Shuangshuang Shi, Bin Zhu, Wen Lu, Shuqi Yan, Chenwei Fang, Xiaohui Liu, Duanyang Liu, Chao Liu
Summary: This study used a UAV platform to measure the vertical distribution of BC and PM2.5 in the boundary layer and found that different shapes of BC profiles were influenced by atmospheric thermodynamics and transport, impacting RF and HR.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Meteorology & Atmospheric Sciences
David M. Romps, Jacob T. Seeley, Jacob P. Edman
Summary: This article explores the reasons for the logarithmic forcing effect of carbon dioxide and proposes a simplified model to explain the relationship between radiative forcing and CO2 concentration. It is also demonstrated that the alternative explanation based on the tropospheric lapse rate is not necessary or sufficient to explain the logarithmic forcing of carbon dioxide, and generally does not apply to well-mixed greenhouse gases in Earth's atmosphere.
JOURNAL OF CLIMATE
(2022)
Article
Environmental Sciences
Wenqian Chen, Xin Wang, Jiecan Cui, Xiaoyi Cao, Wei Pu, Xuan Zheng, Haofan Ran, Jianli Ding
Summary: The study used remote sensing observations and models to retrieve the radiative forcing of black carbon in snow in Xinjiang, China, showing distinct spatial variability and a close correlation with black carbon concentrations and industrial emissions.
ATMOSPHERIC ENVIRONMENT
(2021)
Article
Environmental Sciences
Baseerat Romshoo, Mudasir Ahmad Bhat, Gazalla Habib
Summary: This study analyzed black carbon (BC) data from three different environments in India and found that Delhi had the highest average BC concentration, followed by Srinagar and Gulmarg. Aerosols from neighboring agricultural regions and burning of horticulture residue were the main contributors to BC in Delhi and Srinagar, while tourist activities and wood burning were the main sources in Gulmarg. BC concentrations in Delhi were much higher than in Srinagar and Gulmarg, with fossil fuels being the primary source. These findings highlight the importance of controlling BC emissions to mitigate impacts on cryosphere, human health, and other sectors.
ATMOSPHERIC ENVIRONMENT
(2023)
Article
Meteorology & Atmospheric Sciences
Liang Yuan, Xiaoling Zhang, Yuzhang Che, Xiang'ao Xia, Xuan Liu, Tianliang Zhao, Minghao Song
Summary: The vertical distribution of black carbon (BC) in the atmosphere over Chengdu, a megacity in the Sichuan Basin, China, during a winter pollution period in 2017 was studied. The study found that BC exhibited different vertical patterns, which were related to the evolution of the mixing layer and local emissions. The different patterns of BC distribution had varying effects on atmospheric radiation and heating. Furthermore, the terrain and climatic conditions had significant impacts on the vertical distribution of BC.
ATMOSPHERIC RESEARCH
(2022)
Article
Environmental Sciences
Nan Li, Haoran Zhang, Shuhan Zhu, Hong Liao, Jianlin Hu, Keqin Tang, Weihang Feng, Ruhan Zhang, Chong Shi, Hongmei Xu, Lei Chen, Jiandong Li
Summary: The study used the WRF-Chem model to simulate PM2.5 in the Yangtze River Delta region of China in 2017 and evaluated the air quality improvement and associated health burden in the final year of the Clean Air Plan. The results showed that the plan effectively reduced PM2.5 pollution levels by around 30%. The primary PM2.5 showed a more significant decreasing trend than the secondary PM2.5, mainly due to the clear air actions and worsening ozone pollution. The study emphasized the benefits of the Clean Air Plan and suggested focusing on controlling secondary pollutants for further PM2.5 improvement.
ENVIRONMENT INTERNATIONAL
(2023)
Article
Environmental Sciences
Jianbing Jin, Li Fang, Baojie Li, Hong Liao, Ye Wang, Wei Han, Ke Li, Mijie Pang, Xingyi Wu, Hai Xiang Lin
Summary: This study proposes a four-dimensional ensemble variational-based ammonia emission inversion system to optimize ammonia emissions in China. The results show that the optimized source estimate improves the accuracy of the simulation.
ENVIRONMENTAL RESEARCH LETTERS
(2023)
Article
Environmental Sciences
Jiandong Li, Xin Hao, Hong Liao, Huibin Dai, Nan Li, Yixuan Gu, Ruijun Dang, Baojie Li, Ying Wei
Summary: Central heating in North China causes severe air pollution, and the length of heating season is decreasing over the years. Under the Shared Socioeconomic Pathway 5-8.5 (SSP5-85) and carbon-neutral (CN) scenarios, the start and end dates of central heating in the North China Plain will be delayed and advanced, respectively. A flexible heating policy (FHP) based on temperature is proposed to reduce severe PM2.5 pollution, and it is found that FHP implementation can provide up to a 24% reduction in severe PM2.5 pollution during the year 2019. Future carbon-neutral policies can greatly improve air quality, but the SSP5-85 scenario may still lead to high pollutant emissions and frequent pollution days by 2050.
ENVIRONMENTAL RESEARCH LETTERS
(2023)
Article
Meteorology & Atmospheric Sciences
Pinya Wang, Yang Yang, Daokai Xue, Yi Qu, Jianping Tang, L. Ruby Leung, Hong Liao
Summary: Compound hazards, such as extreme heatwaves and tropical cyclones, have a remarkable concurrent relationship. The occurrences of heatwaves and tropical cyclones over southeastern coast of China (SECC) and western North Pacific (WNP) have been increasing in the past 60 years. Concurrent heatwaves and tropical cyclones (TC-HWs) are stronger and longer lasting than heatwaves that occur alone (AHWs). TC activities enhance heatwaves by modulating atmospheric circulations and triggering anomalous descending motion over southern China mainland. More research is needed to assess the future projections of TC-HWs and their impacts on coastal populations.
JOURNAL OF CLIMATE
(2023)
Article
Environmental Sciences
Lei Chen, Hong Liao, Jia Zhu, Ke Li, Yang Bai, Xu Yue, Yang Yang, Jianlin Hu, Meigen Zhang
Summary: This study systematically examines the historical and future changes in premature respiratory mortalities caused by ozone (O3) exposure in China and identifies the primary factors contributing to these changes. The historical assessment for 2013-2019 is based on gridded O3 concentrations, while the future prediction for 2019-2030 uses projected O3 concentrations under different scenarios. The study finds that the deterioration of O3 air quality is the main factor driving the increase in O3-mortality during 2013-2019, but population aging will become the leading cause of future O3-mortality rises from 2019 to 2030.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Yan Li, Baojie Li, Hong Liao, Bing-Bing Zhou, Jing Wei, Yuxia Wang, Yuzhu Zang, Yang Yang, Rui Liu, Xiaorui Wang
Summary: China's non-poverty-stricken areas have more severe PM2.5 pollution than poverty-stricken areas, leading to higher premature mortality. China's total PM2.5-related premature mortality is relatively evenly distributed across regions of different GDP per capita levels, but slightly increased from 2015 to 2020 due to the change in age structure. PM2.5-related premature deaths are more severe for populations of low socioeconomic status, and this environmental health inequality may be amplified by population aging. Migration from China's poverty-stricken areas to developed cities has contributed to a significant number of premature deaths.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Editorial Material
Multidisciplinary Sciences
Yang Yang, Liangying Zeng, Hailong Wang, Pinya Wang, Hong Liao
Article
Meteorology & Atmospheric Sciences
J. F. Brewer, D. J. Jacob, S. H. Jathar, Y. He, A. Akherati, S. Zhai, D. S. Jo, A. Hodzic, B. A. Nault, P. Campuzano-Jost, J. L. Jimenez, R. J. Park, Y. J. Oak, H. Liao
Summary: We propose a new Volatility Basis Set (VBS) representation for aromatic Secondary Organic Aerosol (SOA) and apply it to atmospheric chemistry models. Our scheme was able to simulate the observations of organic aerosol (OA) from the KORUS-AQ field campaign better than the default schemes used in GEOS-Chem, showing improved representation of vertical profiles, diurnal cycle, and partitioning between hydrocarbon-like OA and oxidized OA. Our results confirm the significant contributions of oxidized primary OA, aromatic SOA, and semi- and intermediate volatile organic compounds (S/IVOCs) to the OA budget in South Korea.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2023)
Article
Green & Sustainable Science & Technology
Chu Sun, Baojie Li, Lei Chen, Yucheng Gao, Jianbing Jin, Xuan Gu, Yang Yang, Yuxiang Lou, Yongqi Zhao, Hong Liao
Summary: This study constructed a high-resolution industrial source NOx emission inventory based on the continuous emission monitoring system (CEMS) data, and compared it with existing inventories. The study found that the total NOx emissions from power plants, industrial boilers, ferrous metal manufacturing, non-metallic mineral manufacturing, and chemical manufacturing industries in Jiangsu Province in 2018 were 55, 27, 64, 28, and 3 Gg, respectively. The emissions from industrial sources were higher in summer and lower in winter, with significant fluctuations in power plant emissions. The high-precision emission inventory established in this study is significant for formulating real-time differentiated precise prevention and control policies and improving the accuracy of air quality models.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Environmental Sciences
Pengwei Li, Yang Yang, Hailong Wang, Su Li, Ke Li, Pinya Wang, Baojie Li, Hong Liao
Summary: Emissions of ozone precursors in the US have decreased, leading to a decrease in summer but an increase in winter near-surface ozone concentrations. Domestic emission reductions from energy and surface transportation are primarily responsible for the decrease in summer ozone, while in winter, emission control weakens the NOx titration process and leads to increases in ozone from natural sources. Increases in aviation and shipping emissions and transpacific transport of ozone from Asia also contribute to the winter ozone increase, along with changes in large-scale circulation.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Environmental Sciences
Jinyan Dong, Baojie Li, Yan Li, Rui Zhou, Cong Gan, Yongqi Zhao, Rui Liu, Yating Yang, Teng Wang, Hong Liao
Summary: In recent years, there has been an increase in atmospheric ammonia (NH3) concentrations in China. This study analyzed the spatiotemporal distribution, urban-rural gradient, and contributing factors (meteorology, social, atmospheric acid gases, and NH3 emissions) of NH3 in China from 2008 to 2019 using satellite observations. The results showed a significant increase in NH3 concentrations, with the highest levels in the North China Plain. The NH3 concentrations were higher in urban areas compared to rural areas, and the gap between urban and rural NH3 concentrations was widening. Atmospheric acid gases were identified as the main factor contributing to the increase in NH3 concentrations.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Shixian Zhai, Daniel J. Jacob, Drew C. Pendergrass, Nadia K. Colombi, Viral Shah, Laura Hyesung Yang, Qiang Zhang, Shuxiao Wang, Hwajin Kim, Yele Sun, Jin-Soo Choi, Jin-Soo Park, Gan Luo, Fangqun Yu, Jung-Hun Woo, Younha Kim, Jack E. Dibb, Taehyoung Lee, Jin-Seok Han, Bruce E. Anderson, Ke Li, Hong Liao
Summary: Air quality network data in China and South Korea reveal high concentrations of coarse particulate matter (PM), with coarse PM contributing nearly half of PM10. The dominant source of coarse PM is anthropogenic fugitive dust, as indicated by strong daily correlations with carbon monoxide. Reductions in construction and vehicle traffic due to COVID-19 led to a significant decrease in coarse PM concentrations in 2020. The inclusion of anthropogenic coarse PM in air quality models helps to explain the formation of fine particulate nitrate and its sensitivity to emissions of ammonia and sulfur dioxide.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Environmental Sciences
Nadia K. Colombi, Daniel J. Jacob, Laura Hyesung Yang, Shixian Zhai, Viral Shah, Stuart K. Grange, Robert M. Yantosca, Soontae Kim, Hong Liao
Summary: Despite efforts to decrease emissions, surface ozone pollution in South Korea has increased over the past 2 decades and consistently exceeds the air quality standard. A study of the trends in surface ozone and NO2 concentrations from 2015 to 2019 reveals an increase in ozone concentration in April-May and a decrease in NO2 concentration by 22%. Global atmospheric chemistry models can successfully simulate surface ozone and explain the emission-driven ozone trend in the Seoul metropolitan area.
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)
