Article
Plant Sciences
F. Galasso, S. Feist-Burkhardt, E. Schneebeli-Hermann
Summary: The discovery of possible teratological features (i.e. unseparated spore tetrads and darkened sporomorphs) in the deposits of the Posidonia Shale Formation suggests environmental changes prior to the Toarcian Oceanic Anoxic Event (T-OAE).
REVIEW OF PALAEOBOTANY AND PALYNOLOGY
(2022)
Article
Geochemistry & Geophysics
Kun Wang, Li-Peng Zhang, Jiang-Hong Deng, Qing-Lin Sui, Guo-Zhi Xie, Wei-Dong Sun
Summary: Research suggests a strong correlation between the temporal distribution of ilmenite-series granitoids in Japan and oceanic anoxic events (OAEs). The subduction of OAE sediments releases reducing fluids/melts rich in organic matters, leading to the formation of ilmenite-series granitoids. This process has major influences on carbon recycling, climate changes, and oxygen fugacity of convergent margin magmas and related mineralizations.
Article
Multidisciplinary Sciences
Alexandra Kunert, Brian Kendall
Summary: Mesozoic oceanic anoxic events are widespread deposits of marine organic-rich mudrocks associated with mass extinctions and large igneous province emplacement. The Toarcian Oceanic Anoxic Event is an example of expanded ocean anoxia due to environmental perturbations linked to the Karoo-Ferrar igneous province. However, the global extent and nature of anoxia during the Toarcian Oceanic Anoxic Event remain poorly understood. This study estimates the global anoxic and euxinic seafloor areas before and during the event using rhenium and molybdenum enrichments in organic-rich mudrocks of the Fernie Formation in Canada. The results show an expansion of seafloor anoxia dominated by euxinia at the onset of the event, followed by a contraction, and the ocean redox trends align with patterns of biodiversity collapse and recovery.
NATURE COMMUNICATIONS
(2023)
Article
Multidisciplinary Sciences
Hironao Matsumoto, Rodolfo Coccioni, Fabrizio Frontalini, Kotaro Shirai, Luigi Jovane, Ricardo Trindade, Jairo F. Savian, Junichiro Kuroda
Summary: During the mid-Cretaceous, the Earth experienced drastic environmental perturbations, mainly triggered by submarine volcanic activities. High-resolution Os isotopic records indicate that most of these events were associated with massive submarine volcanic episodes, but some minor events may have been caused by monsoonal activity.
NATURE COMMUNICATIONS
(2022)
Article
Geology
Viktoria Baranyi, Xin Jin, Jacopo Dal Corso, Zhiqiang Shi, Stephen E. Grasby, David B. Kemp
Summary: The Early Jurassic Toarcian oceanic anoxic event had significant impacts on both marine and terrestrial ecosystems. This study suggests that the collapse of the terrestrial ecosystem during this event was caused by the accumulation of toxic heavy metals, which poisoned plants and made them more vulnerable to other stresses. This eventually led to a widespread collapse across all terrestrial trophic levels.
Article
Multidisciplinary Sciences
Sinjini Sinha, A. D. Muscente, James D. Schiffbauer, Matt Williams, Guenter Schweigert, Rowan C. Martindale
Summary: Research on three Lower Jurassic Lagerstatten deposits shows that they were all deposited during the Toarcian OAE period, with fossils mainly preserved through phosphatization. This indicates that these deposits were formed in conditions conducive to phosphatization, suggesting that the TOAE promoted exceptional preservation in marine environments globally.
SCIENTIFIC REPORTS
(2021)
Article
Multidisciplinary Sciences
Eric Font, Luis Vitor Duarte, Mark J. Dekkers, Celine Remazeilles, Ramon Egli, Jorge E. Spangenberg, Alicia Fantasia, Joana Ribeiro, Elsa Gomes, Jose Mirao, Thierry Adatte
Summary: The carbon isotope excursion (CIE) of the Toarcian Oceanic Anoxic Event during the Lower Jurassic is caused by the large-scale release of isotopically light carbon. The sources for this release include methane hydrate dissociation, volcanogenic outgassing of carbon dioxide, and thermogenic methane release from the Karoo-Ferrar magmatic province in southern Africa. Additionally, small-scale shifts, interpreted as rapid methane pulses linked to astronomically forced climate changes, are observed on top of the long-term CIE.
SCIENTIFIC REPORTS
(2022)
Article
Multidisciplinary Sciences
Nathan Pacoureau, Cassandra L. Rigby, Peter M. Kyne, Richard B. Sherley, Henning Winker, John K. Carlson, Sonja V. Fordham, Rodrigo Barreto, Daniel Fernando, Malcolm P. Francis, Rima W. Jabado, Katelyn B. Herman, Kwang-Ming Liu, Andrea D. Marshall, Riley A. Pollom, Evgeny V. Romanov, Colin A. Simpfendorfer, Jamie S. Yin, Holly K. Kindsvater, Nicholas K. Dulvy
Summary: Overfishing is the primary cause of marine defaunation, with global abundance of oceanic sharks and rays declining by 71% since 1970. Three-quarters of the species in this important assemblage are now at risk of extinction. Urgent measures, such as strict fishing prohibitions and science-based catch limits, are needed to prevent further population collapse and promote species recovery.
Article
Plant Sciences
Francesca Galasso, Susanne Feist-Burkhardt, Elke Schneebeli-Hermann
Summary: The Toarcian Oceanic Anoxic Event (T-OAE) lasted for several hundred thousand years and was characterized by marine anoxia. Abiotic factors such as global warming, changes in weathering intensity, and sea-level change were associated with significant changes in carbon cycling. Comprehensive palynological data from the T-OAE section in Dormettingen, Germany, revealed that terrestrial ecosystems responded early to abiotic disturbances even before the T-OAE.
REVIEW OF PALAEOBOTANY AND PALYNOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Pavel Kabanov, Tyler E. Hauck, Sofie A. Gouwy, Stephen E. Grasby, Annique van der Boon
Summary: This paper reviews the global records of anoxic events during the Middle Devonian - earliest Mississippian and explores their triggers and controls. The study focuses on the Horn River Group (HRG), where four major events and numerous positive d(13)C excursions are observed. The occurrences of these events resemble classical Mesozoic oceanic anoxic events (OAEs) and suggest a volcanic trigger, as shown by spikes in Hg and negative Os-187/Os-188 anomalies. The Devonian anoxic events caused extinctions due to deoxygenation, acidification, and intensified weathering and eutrophication of shelfal seas.
EARTH-SCIENCE REVIEWS
(2023)
Article
Geography, Physical
Mu Liu, Changjun Ji, Hewei Hu, Guoqing Xia, Haisheng Yi, Theodore R. Them, Peng Sun, Daizhao Chen
Summary: During the Toarcian Oceanic Anoxic Event, there was a reduction in animal diversity and a resurgence in microbial abundances. Organic geochemical studies in the Quse Formation revealed that kerogen in the shale samples primarily originated from marine photosynthetic species, while maltene represented a mixture of various organisms. Isotopic inversions during the T-OAE interval suggest two phases separated by the nadir of carbon isotopes: early N-CIE and late N-CIE.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2021)
Article
Geology
Kunio Kaiho, Md. Aftabuzzaman, David S. Jones, Li Tian
Summary: The eruption of the Siberian Traps large igneous province (LIP) is believed to have triggered both terrestrial and marine ecosystem crises, with discrete volcanic eruptions potentially causing the terrestrial crisis followed by the marine crisis in a short period of time. Using coronene and mercury spikes as proxies can help pinpoint the timing and impacts of LIP emplacement more accurately.
Article
Geochemistry & Geophysics
Yuxu Zhang, Hanjie Wen, Chuanwei Zhu, Haifeng Fan, Jiafei Xiao, Jing Wen
Summary: The study reveals a connection between the molybdenum isotope compositions and marine anoxia events at the Permian-Triassic boundary in southern China. Marine carbonate sediments seem to record paleo-ocean Mo isotopic signals indicating a more reducing sedimentary environment during this time.
Article
Geography, Physical
Emma R. Hartke, Bradley D. Cramer, Mikael Calner, Michael J. Melchin, Bruce A. Barnett, Stephan C. Oborny, Alyssa M. Bancroft
Summary: The study reveals asynchronous behavior of carbon isotopic changes across the Llandovery-Wenlock boundary during the onset of the Ireviken Biogeochemical Event, with unique variations in Delta C-13 and f(org) contributing to potential causative mechanisms of extinction and carbon cycle perturbation. The high-resolution isotope data highlights the critical importance of chemostratigraphic research in evaluating ancient Earth-life system perturbations, with comparisons made to the Cretaceous Oceanic Anoxic Event 2 for the first time.
GLOBAL AND PLANETARY CHANGE
(2021)
Article
Geology
Pedro A. Fernndez-Mendiola, Joanaitz Perez-Malo, Hugh G. Owen, Joaquin Garcia-Mond
Summary: The Aptian sedimentary deposits of the Castro Urdiales area in north Spain record a post-OAE1a episode of disoxia/anoxia. The lower to upper Aptian black lutites and marlstones of the Castro Urdiales area are correlated with other Aptian sections of the Basque-Cantabrian Basin and southeastern France. Prior to the oxygen deficient episode, glauconite-and-ostreid facies were deposited during the Gutiolo volcanic event. The volcanism correlates in part with the Cretaceous superplume eruptions.
CRETACEOUS RESEARCH
(2023)
Article
Engineering, Environmental
Guohong Liu, Xiliang Yan, Chengjun Li, Song Hu, Jiachen Yan, Bing Yan
Summary: The interactions between transition-metal dichalcogenides (TMDCs) and per- and polyfluoroalkyl substances (PFAS) were explored using experimental methods and machine learning approaches. The study revealed that TMDCs-PFAS interactions have unique toxicity effects on cell lines and enhance the bioaccumulation of TMDCs in zebrafish, leading to oxidative stress and histopathological alterations. This research emphasizes the importance of investigating interactions between emerging and existing contaminants in aquatic environments using state-of-art techniques to safeguard environmental health.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Environmental Sciences
Ling Qi, Haotian Zheng, Dian Ding, Shuxiao Wang
Summary: This study investigates the response of sulfate and nitrate to anthropogenic emission changes in eastern China. The results show that sulfate concentration decreases with decreasing SO2 emissions, but at a slower rate due to higher sulfur oxidation ratio at lower SO2 levels. Nitrate concentration decreases with decreasing NOx emissions in summer but slightly increases in winter. The decrease in TN is faster in summer, while the increase in epsilon(NO3-) is attributed to the reduction of [pNO(4)(2-)] in winter.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
Mengjie Zhang, Lan Gao, Quanda Wang, Donglai Xie, Ji Gao, Shuxiao Wang, Xi Lu
Summary: The coal-to-natural gas transition in northern China has brought significant environmental and health benefits since 2017. However, the lack of accurate estimates on methane leakage from gas boilers hinders reliable assessment of greenhouse gas emissions. This study used a high-precision CO2-CH4 analyzer to examine 30 gas boilers in Beijing, estimating the methane leakage rates and reassessing the reduction in GHG emissions from the transition. The findings provide important data for amending NG appliance standards and evaluating energy transition policies in China.
ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS
(2023)
Article
Engineering, Environmental
Haotian Zheng, Xing Chang, Shuxiao Wang, Shengyue Li, Dejia Yin, Bin Zhao, Guanghan Huang, Lyuyin Huang, Yueqi Jiang, Zhaoxin Dong, Yicong He, Cheng Huang, Jia Xing
Summary: Emissions of organic compounds have significant impacts on the environment. Previous emission inventories focused on only a portion of these compounds, neglecting the contribution of semivolatile and intermediate volatile organic compounds to organic aerosol burden. This study developed a comprehensive emission inventory for China from 2005 to 2019, revealing changes in the sources and formation potential of organic aerosols. Findings indicate a decline in emissions of low/extremely low/ultralow VOC and SVOC after 2014, while emissions from volatile chemical products increased significantly and became the dominant source. These results highlight the importance of considering VCP, residential biomass burning, and diesel vehicles in future air pollution control policies.
ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS
(2023)
Review
Environmental Sciences
Jin Zhang, Chengjun Li, Wenli Tang, Mengjie Wu, Mingying Chen, Huan He, Pei Lei, Huan Zhong
Summary: Wetlands are important areas for studying mercury (Hg) biogeochemistry and have attracted global attention. A literature analysis of 15,813 publications on Hg in wetlands was conducted, revealing the changing focus of research over time. The research priorities for future studies include understanding the factors controlling methylmercury (MeHg) production, demethylation processes, bioaccumulation, and the role of wetlands in Hg circulation.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Correction
Multidisciplinary Sciences
Dijuan Liang, Xi Lu, Minghao Zhuang, Guang Shi, Chengyu Hu, Shuxiao Wang, Jiming Hao
Article
Environmental Sciences
Jie Li, Ji-cheng Jang, Yun Zhu, Che-Jen Lin, Shuxiao Wang, Jia Xing, Xinyi Dong, Jinying Li, Bin Zhao, Bingyao Zhang, Yingzhi Yuan
Summary: In this study, an innovative recurrent spatiotemporal deep-learning (RSDL) method with model-monitor coupled convolutional recurrent neural networks (ConvRNN) was developed to improve the prediction accuracy of ozone (O3) formation by chemical transport models (CTM). The RSDL method successfully characterized the spatiotemporal relationships between monitored O3 data and CTM simulations, and achieved accurate 72-hour multi-site forecasts in the Pearl River Delta region of China. The results showed significant improvement in the correlation coefficient (R) and mean absolute error (MAE), indicating the effectiveness of the RSDL method in predicting O3 concentrations.
ENVIRONMENTAL POLLUTION
(2023)
Article
Environmental Sciences
Wenli Tang, Junru Chu, Huan Zhong
Summary: Accurately measuring the concentration of methylmercury (MeHg) is crucial for mercury (Hg) research. In this study, we compared two widely used methods for extracting MeHg from paddy soils, namely acid extraction and alkaline extraction. Through evaluation and quantification, we found that alkaline extraction is the optimal choice for paddy soils, with minimal MeHg artifact and consistently high extraction efficiency compared to acid extraction. Our findings emphasize the importance of suitable pre-treatment and quality controls in measuring MeHg concentrations.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Yuyang Li, Jiewen Shen, Bin Zhao, Runlong Cai, Shuxiao Wang, Yang Gao, Manish Shrivastava, Da Gao, Jun Zheng, Markku Kulmala, Jingkun Jiang
Summary: Sulfuric acid (SA) is a major precursor for atmospheric new particle formation (NPF), and the formation of SA-dimethylamine (DMA) clusters initiates intense NPF events in polluted urban atmospheres. We developed a parameterization of SA-DMA nucleation based on cluster dynamic simulations and quantum chemistry calculations, which successfully reproduced the dependence of particle formation rates on temperature and condensation sinks (CSs). The parameterization was incorporated into a 3-D chemical transport model and showed good agreement with observations in wintertime Beijing, contributing significantly to nucleation rates and aerosol population during the simulations.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Geosciences, Multidisciplinary
Shengyue Li, Shuxiao Wang, Qingru Wu, Yanning Zhang, Daiwei Ouyang, Haotian Zheng, Licong Han, Xionghui Qiu, Yifan Wen, Min Liu, Yueqi Jiang, Dejia Yin, Kaiyun Liu, Bin Zhao, Shaojun Zhang, Ye Wu, Jiming Hao
Summary: China has compiled an emission inventory of air pollutants and CO2 from 2005 to 2021, and the study shows that mitigation policies have successfully decoupled air pollutant and CO2 emissions from economic development since 2013. The study also highlights the potential for synergistic emission reduction in different sectors and regions of China.
EARTH SYSTEM SCIENCE DATA
(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)
Letter
Medicine, General & Internal
Chengjun Li, Huan Zhong, Yuwei Xie, Tian Bai, Bing Yan, Christian Sonne
Article
Chemistry, Multidisciplinary
Xiaokun Liu, Zhiying Zhang, Nikodem Tomczak, Cong Yang, Chengjun Li, Rongrong Liu, Bing Yan
Summary: In this study, a novel antibacterial composite nanomaterial based on spiky mesoporous silica spheres loaded with poly(ionic liquid)s and aggregation-induced emission luminogens (AIEgens) was designed for efficient treatment and imaging of multidrug-resistant (MDR) bacteria. The nanocomposite exhibited excellent and long-term antibacterial activity towards both Gram-negative and Gram-positive bacteria. Additionally, fluorescent AIEgens facilitated real-time bacterial imaging. This study provides a multifunctional platform and a promising alternative to antibiotics for combating pathogenic MDR bacteria.
NANOSCALE ADVANCES
(2023)
Article
Engineering, Environmental
Jingran Zhang, Yiliang Jiang, Yunjie Wang, Shaojun Zhang, Ye Wu, Shuxiao Wang, Chris P. Nielsen, Michael B. McElroy, Jiming Hao
Summary: China's booming civil aviation market has led to increased aircraft emissions, which have been found to be a significant contributor to air pollution and health issues. This study used flight trajectory data to simulate the impact of aviation emissions on ground-level air pollution in China, and the results show that aviation emissions have become a major source of ambient air pollution, causing health problems in densely populated regions, especially the eastern coastal areas.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Yao Hu, Shaofei Kong, Yi Cheng, Guofeng Shen, Dantong Liu, Shuxiao Wang, Limin Guo, Pingqing Fu
Summary: This study determined the emission factors of levoglucosan from different solid fuel samples by considering fuel properties and combustion parameters. The results showed that short combustion duration and medium combustion temperature influenced levoglucosan generation and accumulation. The ash content was identified as the most important factor affecting levoglucosan formation.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
