Article
Environmental Sciences
Marianne Tronstad Lund, Gunnar Myhre, Ragnhild Bieltvedt Skeie, Bjorn Hallvard Samset, Zbigniew Klimont
Summary: This study compares the effects of recent global emission inventories on simulated trends in anthropogenic aerosol abundances and radiative forcing. The results show that using the ECLIPSE version 6 and CEDS year 2021 release leads to lower global mean aerosol optical depth (AOD) compared to the first CEDS release, with larger differences in China and India. The study also finds a negative linear trend in global AOD over 2005-2017, which is stronger with CEDS21 and ECLv6.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Meteorology & Atmospheric Sciences
Erika von Schneidemesser, Brian C. McDonald, Hugo Denier van der Gon, Monica Crippa, Diego Guizzardi, Agnes Borbon, Pamela Dominutti, Ganlin Huang, Greet Jansens-Maenhout, Meng Li, Chang-Feng Ou-Yang, Shelby Tisinai, Jia-Lin Wang
Summary: Emission inventories are crucial for air quality and climate modeling, but accurately representing NMVOCs in these inventories is challenging. This study evaluates the representation of urban NMVOC speciation in a global emission inventory and finds little agreement between observations and estimates. Regional inventories show better agreement, suggesting the need for improved speciation profiles and spatial allocation of NMVOCs.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2023)
Article
Geosciences, Multidisciplinary
Kun Wang, Chao Gao, Kai Wu, Kaiyun Liu, Haofan Wang, Mo Dan, Xiaohui Ji, Qingqing Tong
Summary: The ISAT (Inventory Spatial Allocation Tool) v2.0 is an integrated tool designed to configure nested domains, downscale regional emission inventories, allocate local emission inventories, and generate model-ready emission inventories for the Weather Research and Forecasting (WRF)-Air Quality Numerical Model (AQM). It consists of four modules, namely Prepgrid, Downscale, Mapinv, and Prepmodel, each performing specific tasks. The tool provides a user-friendly solution for model users to configure and run WRF-AQM, and serves as a framework for researchers to develop similar tools for WRF-AQM.
GEOSCIENTIFIC MODEL DEVELOPMENT
(2023)
Article
Engineering, Environmental
Fan Zhang, Xiangzheng Deng, Li Xie, Ning Xu
Summary: This study explores the dynamics of China's carbon emissions, predicts the peak and cumulative emissions under different SSP scenarios, and investigates the relationship between carbon emissions and population, education level, and per capita GDP. The results show the contributions of different provinces to total carbon emissions under different scenarios, providing important insights for carbon reduction and climate change mitigation.
RESOURCES CONSERVATION AND RECYCLING
(2021)
Article
Environmental Sciences
Shaoqing Zhang, Liping Lei, Mengya Sheng, Hao Song, Luman Li, Kaiyuan Guo, Caihong Ma, Liangyun Liu, Zhaocheng Zeng
Summary: This study evaluates the consistency and uncertainty of four commonly used emission inventories in China using satellite observations and machine learning methods. The results show significant inconsistencies among these inventories, especially in areas with high emissions. The inventories tend to overestimate emissions in Chinese cities and slightly underestimate emissions in the USA. The study also finds that the uncertainty of emission inventories is higher in Asian countries compared to Europe and the USA.
Article
Geosciences, Multidisciplinary
Marc Guevara, Oriol Jorba, Carles Tena, Hugo Denier van der Gon, Jeroen Kuenen, Nellie Elguindi, Sabine Darras, Claire Granier, Carlos Perez Garcia-Pando
Summary: CAMS-TEMPO dataset provides temporal profiles of global and European emissions for various pollutant and greenhouse gas categories, derived from different anthropogenic activities. The dataset offers gridded monthly, daily, weekly, and hourly weight factors for atmospheric chemistry modeling, with information on emission variability and influences from sociodemographic factors and climatological conditions.
EARTH SYSTEM SCIENCE DATA
(2021)
Article
Engineering, Environmental
Katelyn A. Yu, Brian C. McDonald, Robert A. Harley
Summary: Fuel-based NOx emission inventories for California and the US over the period 1990-2020 showed a 70% decline in total on-road NOx emissions, with California leading the reduction by 48% compared to the national decrease. Further efforts have been taken in California to introduce new heavy-duty engines equipped with selective catalytic reduction systems, contributing to the steeper decrease in diesel NOx emissions in the state.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Engineering, Environmental
Chenyi Zhang, Huijuan Dong, Yong Geng, Xiaoqian Song, Tianyu Zhang, Mufan Zhuang
Summary: This study predicts greenhouse gas emissions from municipal solid waste treatment in China and analyzes the potential for carbon neutrality. The results show that economic development is the main driver of emissions, and achieving carbon neutrality requires the implementation of appropriate policies and mitigation measures.
RESOURCES CONSERVATION AND RECYCLING
(2022)
Article
Environmental Sciences
Marina Andrijevic, Edward Byers, Alessio Mastrucci, Jeroen Smits, Sabine Fuss
Summary: The global society's ability to adapt to climate change remains uncertain, with socioeconomic factors such as income, urbanization, and income inequality playing a key role in determining populations' adaptive capacity to heat stress. Depending on different scenarios of socioeconomic development, the total population affected by the cooling gap could vary between 2 billion and 5 billion people by 2050, highlighting significant regional inequalities in adaptive capacity and underscoring the importance of considering different levels of adaptive capacity in climate change impact assessments.
ENVIRONMENTAL RESEARCH LETTERS
(2021)
Article
Multidisciplinary Sciences
John D. Patterson, Murat Aydin, Andrew M. Crotwell, Gabrielle Petron, Jeffrey P. Severinghaus, Paul B. Krummel, Ray L. Langenfelds, Eric S. Saltzman
Summary: The study indicates that the atmospheric levels of H2 in the southern hemisphere have been continuously rising from the mid to late 19th century to the 20th century, likely due to increased methane oxidation and anthropogenic emissions. Despite a reduction in automotive emissions in the late 20th century, the H2 levels in the atmosphere did not show a similar decrease.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Construction & Building Technology
Fredrik Domhagen, Sarka Langer, Angela Sasic Kalagasidis
Summary: New buildings often have high initial concentrations of VOCs, causing discomfort among occupants. Traditionally, running the ventilation system continuously for a year is practiced to reduce VOC levels, but it may result in unnecessary heat losses. This article proposes a new approach called VOC-passport, combining early VOC measurements and a calculation model to optimize ventilation strategies. The proposed model is successfully tested in two newly built office rooms and provides an effective way to improve indoor air quality in new buildings without compromising energy efficiency.
BUILDING AND ENVIRONMENT
(2023)
Article
Environmental Sciences
Hemraj Bhattarai, Amos P. K. Tai, Maria Val Martin, David H. Y. Yung
Summary: Surface ozone is a significant air pollutant and greenhouse gas that poses risks to human health, vegetation, and climate. This study examines the impacts of land use change, climate, and emissions on global ozone levels, highlighting the complex interactions and the need for comprehensive strategies to control air pollution effectively.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Tomohiro Oda, Liang Feng, Paul Palmer, David F. Baker, Lesley E. Ott
Summary: Monitoring national and global greenhouse gas emissions is crucial for the Paris Agreement, and top-down approaches using atmospheric data are useful for verifying emission inventories. However, current methods have limitations in quantifying non-fossil fuel CO2 emissions, and improvement in inventories, measurement methods, and transport models is needed.
ENVIRONMENTAL RESEARCH LETTERS
(2023)
Article
Engineering, Environmental
Yang Zhang, Lei Zhang, Shuzhen Cao, Xia Liu, Jingmeng Jin, Yu Zhao
Summary: An integrated Dynamic Inventory for Mercury Emission (DIME) model was developed, improving the accuracy of emission estimates for primary sources in China. Long-term historical speciated Hg emission inventories for China were established, and three stages with distinct leading drivers were identified. The improved emission estimation methods, consistency in methodology for historical Hg emission inventories, and accurate spatial distribution of speciated Hg emissions provide a practical toolkit for the effectiveness evaluation of the Minamata Convention.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Green & Sustainable Science & Technology
Dandan Liu, Lu Bai, Qi Qiao, Yue Zhang, Xueying Li, Ruonan Zhao, Jingyang Liu
Summary: Anthropogenic phosphorus input has caused eutrophication in the Yangtze River, with livestock contributing the most to annual TP emissions in the Tuojiang River Basin (TJRB). Agricultural, domestic, and industrial emissions also play significant roles. Nonpoint sources contribute significantly more than point sources, with industrial emissions identified as the key source of uncertainty. Effective livestock management practices and facility utilization can help reduce TP emissions into the TJRB. The study provides important data for future pollution control efforts.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Multidisciplinary Sciences
Xiao Lu, Danile J. Jacob, Yuzhong Zhang, Lu Shen, Melissa P. Sulprizio, Joannes D. Maasakkers, Daniel J. Varon, Zhen Qu, Zichong Chen, Benjamin Hmiel, Robert J. Parker, Hartmut Boesch, Haolin Wang, Cheng He, Shaojia Fan
Summary: According to national reports, the United States is the largest oil/gas methane emitter in the world. Reducing these emissions is a top priority in the US government's climate action plan. A study conducted using high-resolution inversion of surface and satellite observations of atmospheric methane from 2010 to 2019 found that US oil/gas methane emissions were higher than reported by the US Environmental Protection Agency, while emissions in Canada and Mexico decreased over the same period. The study also observed a steady decrease in oil/gas methane intensity in major US production regions.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Multidisciplinary Sciences
Bo Zheng, Philippe Ciais, Frederic Chevallier, Hui Yang, Josep G. Canadell, Yang Chen, Ivar R. van der Velde, Ilse Aben, Emilio Chuvieco, Steven J. Davis, Merritt Deeter, Chaopeng Hong, Yawen Kong, Haiyan Li, Hui Li, Xin Lin, Kebin He, Qiang Zhang
Summary: Extreme wildfires in boreal forests are increasing and impacting Earth's climate. These fires, which account for typically 10% of global fire carbon dioxide emissions, contributed 23% (0.48 billion metric tons of carbon) in 2021. The synchronized water deficit in North American and Eurasian boreal forests in 2021 led to the rapid expansion of wildfires, challenging climate mitigation efforts.
Article
Multidisciplinary Sciences
Kazuyuki Miyazaki, Kevin Bowman
Summary: Quantifying the coevolution of greenhouse gases and air quality pollutants can provide insight into underlying anthropogenic processes enabling predictions of their emission trajectories.
NATURE COMMUNICATIONS
(2023)
Article
Multidisciplinary Sciences
Piyu Ke, Zhu Deng, Biqing Zhu, Bo Zheng, Yilong Wang, Olivier Boucher, Simon Ben Arous, Chuanlong Zhou, Robbie M. Andrew, Xinyu Dou, Taochun Sun, Xuanren Song, Zhao Li, Feifan Yan, Duo Cui, Yifan Hu, Da Huo, Jean-Pierre Chang, Richard Engelen, Steven J. Davis, Philippe Ciais, Zhu Liu
Summary: To monitor the effectiveness of Green Deal plan and the implementation of EU countries' pledges, Monitoring Reporting and Verification tools are necessary to track emissions changes in all sectors. The current official inventories provide annual estimates of national CO2 emissions with a lag of more than one year, unable to capture recent variations caused by events such as COVID lockdowns, economic rebounds, and the war in Ukraine. In this study, we present the Carbon Monitor Europe dataset, which provides near-real-time daily fossil fuel and cement emissions data from January 2019 to December 2021 for 27 EU countries and the UK. The dataset is divided into six sectors and aims to improve the timeliness and temporal resolution of emissions data for European countries.
Article
Meteorology & Atmospheric Sciences
Kaoru Sato, Yoshihiro Tomikawa, Masashi Kohma, Ryosuke Yasui, Dai Koshin, Haruka Okui, Shingo Watanabe, Kazuyuki Miyazaki, Masaki Tsutsumi, Damian Murphy, Chris Meek, Yufang Tian, Manfred Ern, Gerd Baumgarten, Jorge L. Chau, Xinzhao Chu, Richard Collins, Patrick J. Espy, Hiroyuki Hashiguchi, Andrew J. Kavanagh, Ralph Latteck, Franz-Josef Luebken, Marco Milla, Satonori Nozawa, Yasunobu Ogawa, Kazuo Shiokawa, M. Joan Alexander, Takuji Nakamura, William E. Ward
Summary: The ongoing international joint research project, ICSOM, focuses on the interhemispheric coupling phenomenon between winter polar stratosphere warming and summer hemisphere upper mesosphere warming. Through global radar observations, gravitational waves and sudden warming events have been simultaneously observed in multiple boreal winters. The project also includes the development of a new data assimilation system and simulations using a state-of-the-art general circulation model. Initial results suggest that both gravitational waves and large-scale waves play important roles in the interhemispheric coupling mechanism.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2023)
Article
Geosciences, Multidisciplinary
Yutong Wang, Yu Zhao, Yiming Liu, Yueqi Jiang, Bo Zheng, Jia Xing, Yang Liu, Shuai Wang, Chris P. Nielsen
Summary: Near-surface ozone pollution is one of the biggest challenges in China's air quality management. This study uses measurements from the national air quality monitoring network to analyze the spatiotemporal evolution of ozone concentrations from 2010 to 2021. The results show that the national air pollution control programme has effectively reduced ozone levels in China, with emission reductions and changing meteorological conditions playing a role. Furthermore, the effectiveness of emission controls varies by region and season, with rural areas and summer showing greater improvements. Thus, future efforts to control ozone pollution should consider these regional and seasonal variations to target the most important precursors.
Article
Environmental Sciences
Zheng Shi, Yisong Xie, Zhengqiang Li, Ying Zhang, Cheng Chen, Linlu Mei, Hua Xu, Haofei Wang, Yang Zheng, Zhenhai Liu, Jin Hong, Mengyao Zhu, Lili Qie, Luo Zhang, Cheng Fan, Jie Guang
Summary: To address the challenge of obtaining sufficient observations in a short time to support high-precision aerosol retrieval, a generalized spectral land surface reflectance (LSR) reconstruction method was proposed. The method utilizes short-term overlapping observations of a target sensor and a reference sensor to generate a representative spectral LSR comparison dataset. The differences in spectral LSR caused by spectral response functions (SRF) are then explored to construct a spectral LSR reconstruction model. This method has been successfully applied to the Particulate Observing Scanning Polarimeter (POSP) instrument using MODIS as the reference sensor, enabling high-precision aerosol retrieval. Evaluation results show good agreement with validation data from AErosol RObotic NETwork (AERONET) and MODIS Deep Blue AOD product. Rating: 9/10.
REMOTE SENSING OF ENVIRONMENT
(2023)
Article
Multidisciplinary Sciences
Takashi Sekiya, Kazuyuki Miyazaki, Henk Eskes, Kevin Bowman, Kengo Sudo, Yugo Kanaya, Masayuki Takigawa
Summary: Global lockdown measures due to COVID-19 led to significant reductions in air pollutant emissions, including NOx and SO2. This study quantifies the impacts of the lockdown on these emissions and secondary aerosol formation, finding that anthropogenic emissions were reduced by 19 to 25% for NOx and 14 to 20% for SO2 in April 2020. These reductions led to decreases in sulfate and nitrate aerosols over polluted areas, accounting for a substantial portion of observed aerosol optical depth declines and global aerosol radiative forcing. The findings highlight the critical role of secondary aerosol pollutants in understanding the climate impacts of future mitigation measures.
Article
Environmental Sciences
Ruosi Liang, Yuzhong Zhang, Wei Chen, Peixuan Zhang, Jingran Liu, Cuihong Chen, Huiqin Mao, Guofeng Shen, Zhen Qu, Zichong Chen, Minqiang Zhou, Pucai Wang, Robert J. Parker, Hartmut Boesch, Alba Lorente, Joannes D. Maasakkers, Ilse Aben
Summary: This study uses atmospheric methane column retrievals from two different satellite instruments to quantify East Asian methane emissions. The results show consistent emissions in some regions but discrepancies in others, especially in northern India and eastern China. The differences between the two inversions are robust and may be attributed to biases in the satellite retrievals. Overall, there are significant variations in methane emissions estimates between satellite observations.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Green & Sustainable Science & Technology
Qiang Zhang, Zhicong Yin, Xi Lu, Jicheng Gong, Yu Lei, Bofeng Cai, Cilan Cai, Qimin Chai, Huopo Chen, Hancheng Dai, Zhanfeng Dong, Guannan Geng, Dabo Guan, Jianlin Hu, Cunrui Huang, Jianing Kang, Tiantian Li, Wei Li, Yongsheng Lin, Jun Liu, Xin Liu, Zhu Liu, Jinghui Ma, Guofeng Shen, Dan Tong, Xuhui Wang, Xuying Wang, Zhili Wang, Yang Xie, Honglei Xu, Tao Xue, Bing Zhang, Da Zhang, Shaohui Zhang, Shaojun Zhang, Xian Zhang, Bo Zheng, Yixuan Zheng, Tong Zhu, Jinnan Wang, Kebin He
Summary: This study tracks and analyzes the progress of synergetic governance of air pollution and climate change in China by developing and monitoring 18 indicators. It provides policy recommendations for designing a synergetic roadmap of Carbon Neutrality and Clean Air for China.
ENVIRONMENTAL SCIENCE AND ECOTECHNOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Jagat S. H. Bisht, Prabir K. Patra, Masayuki Takigawa, Takashi Sekiya, Yugo Kanaya, Naoko Saitoh, Kazuyuki Miyazaki
Summary: Methane (CH4) is the second major greenhouse gas and its increase in the atmosphere raises concerns about sustainability and climate change. A data assimilation system using a local ensemble transform Kalman filter (LETKF) is developed to estimate surface emissions of CH4. The performance of the system is tested and optimized using simulated observations and three covariance inflation methods. The results show that the RTPS covariance inflation method performs better and produces estimates that are consistent with the true values.
GEOSCIENTIFIC MODEL DEVELOPMENT
(2023)
Article
Environmental Sciences
Peng Wang, Ruhan Zhang, Shida Sun, Meng Gao, Bo Zheng, Dan Zhang, Yanli Zhang, Gregory R. Carmichael, Hongliang Zhang
Summary: Vehicle emissions are a major contributor to air pollution and its health impacts. Traffic congestion exacerbates air pollution and health burdens, especially in urban areas. A new temporal allocation approach was used to investigate the impact of traffic congestion on air quality and health burden in China, showing the need for better vehicle emission control policies and road network planning to reduce congestion and improve air quality.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Environmental Sciences
Madison J. Shogrin, Vivienne H. Payne, Susan S. Kulawik, Kazuyuki Miyazaki, Emily V. Fischer
Summary: Satellite measurements were used to evaluate the spatiotemporal variability of peroxy acyl nitrates (PANs) over and around Mexico City. Results showed that the highest concentrations of PANs occurred in the spring, coinciding with peak photochemistry and air stagnation. The outflow pattern of PANs from urban Mexico City was predominantly towards the northeast and the mountains to the south.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Environmental Sciences
Yuanhong Zhao, Marielle Saunois, Philippe Bousquet, Xin Lin, Michaela I. Hegglin, Josep G. Canadell, Robert B. Jackson, Bo Zheng
Summary: The estimated methane chemical sink by bottom-up methods is significantly higher than the estimates obtained by top-down methods. This difference is mainly due to the large uncertainties in the simulated concentrations of hydroxyl radicals (OH) by the atmospheric chemistry models used in bottom-up estimates. In this study, a new approach based on OH precursor observations and a chemical box model is proposed to improve the accuracy of OH distributions and reconcile the bottom-up and top-down estimates of methane loss. By constraining the simulated OH precursors with observations, the adjusted global mean tropospheric OH concentration ([OH](trop-M)) is around 10x10(5) molec. cm(-3), which is lower than the original model-simulated value and agrees with the top-down estimate. The adjusted methane chemical loss estimate is in line with the latest top-down estimate, contrary to the overestimated bottom-up estimates. The overestimation in global [OH](trop-M) and methane chemical loss by the models is primarily caused by the underestimation of carbon monoxide and total ozone column, and the overestimation of nitrogen dioxide. This study emphasizes the importance of constraining the model-simulated OH fields with available precursor observations to improve bottom-up estimates of the global methane sink.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Green & Sustainable Science & Technology
Yu Lei, Zhicong Yin, Xi Lu, Qiang Zhang, Jicheng Gong, Bofeng Cai, Cilan Cai, Qimin Chai, Huopo Chen, Renjie Chen, Shi Chen, Wenhui Chen, Jing Cheng, Xiyuan Chi, Hancheng Dai, Xiangzhao Feng, Guannan Geng, Jianlin Hu, Shan Hu, Cunrui Huang, Tiantian Li, Wei Li, Xiaomei Li, Jun Liu, Xin Liu, Zhu Liu, Jinghui Ma, Yue Qin, Dan Tong, Xuhui Wang, Xuying Wang, Rui Wu, Qingyang Xiao, Yang Xie, Xiaolong Xu, Tao Xue, Haipeng Yu, Da Zhang, Ning Zhang, Shaohui Zhang, Shaojun Zhang, Xian Zhang, Xin Zhang, Zengkai Zhang, Bo Zheng, Yixuan Zheng, Jian Zhou, Tong Zhu, Jinnan Wang, Kebin He
Summary: China is currently facing the challenges of air pollution and climate change, and the government is actively promoting the synergy between the two. The Synergetic Roadmap project was launched in 2021 to track and analyze the progress of synergetic control in China, and the 2022 report focuses on the progress in 2021 and key actions in various sectors. China's efforts in reshaping energy, economic, and transportation structures have led to a slowdown in carbon emission growth, improved air quality, and increased health benefits in recent years.
ENVIRONMENTAL SCIENCE AND ECOTECHNOLOGY
(2024)