Article
Geochemistry & Geophysics
Zhenbin Li, Tianming Huang, Gang Wang, Yin Long, Fen Zhang, Zhonghe Pang
Summary: Determining groundwater age is crucial for understanding hydrogeological systems and groundwater renewability. This study introduces a novel conceptual model for correcting groundwater C-14 age by determining a virtual initial C-14 content. This method avoids uncertainties associated with conventional approaches and has relatively smaller uncertainty.
APPLIED GEOCHEMISTRY
(2022)
Article
Meteorology & Atmospheric Sciences
Molly E. Menzel, Darryn W. Waugh, Clara Orbe
Summary: There are multiple responses of atmospheric circulation to increased CO2. In the troposphere, the tropical upwelling region narrows, the Hadley cells expand, and the subtropical jet strengthens. In the stratosphere, the tropical upwelling region narrows and strengthens, enhancing the Brewer-Dobson circulation. However, the dynamical coupling between these features remains unclear, indicating independent circulation changes between the stratosphere and troposphere.
JOURNAL OF CLIMATE
(2023)
Article
Environmental Sciences
Sha Feng, Thomas Lauvaux, Christopher A. Williams, Kenneth J. Davis, Yu Zhou, Ian Baker, Zachary R. Barkley, Daniel Wesloh
Summary: Terrestrial biosphere models play a crucial role in studying carbon cycle processes and the carbon-climate system. Evaluation of the CASA TBM using CO2 measurements and flux data reveal uncertainties introduced by the biosphere and highlight issues with missing sink processes and the sensitivity of the model to key parameters such as maximum light use efficiency.
GLOBAL BIOGEOCHEMICAL CYCLES
(2021)
Article
Chemistry, Analytical
Anumaija Leskinen, Jouni Hokkinen, Teemu Karkela, Tommi Kekki
Summary: Characterisation of contaminated and activated decommissioning waste requires sampling of the studied material for the analysis of different radionuclides. In this study, a drilling sampling technique was developed to capture released H-3 and C-14 for analysis. The results showed a significant amount of H-3 released during sampling, while C-14 was not measurable in the studied activated concrete, limiting further speciation studies.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2022)
Article
Energy & Fuels
Mingkun Chen, Yi Zhang, Shezhan Liu, Changzhong Zhao, Shuang Dong, Yongchen Song
Summary: This study investigates the influence of the coupled CO2 diffusion-reaction process on the transport and temporal-spatial evolution of carbonate precipitation. The results show that the interaction between diffusion and reaction promotes mass transfer and migration, leading to an increase in effective diffusion coefficients of CO2. The distribution of carbonate precipitation and sequestration capacity are affected by the water layer and pressure mode.
Article
Geochemistry & Geophysics
Shawn Pedron, X. Xu, J. C. Walker, J. C. Ferguson, R. G. Jespersen, J. M. Welker, E. S. Klein, C. Czimczik
Summary: A passive sampler was developed for time-integrated collection and radiocarbon (C-14) analysis of soil respiration. It allows for more continuous investigations of soil C emission sources, particularly suitable for Arctic environments.
Article
Green & Sustainable Science & Technology
Mingjing Ma, Rui Guo, Longfei Bing, Jiaoyue Wang, Yan Yin, Wenfeng Zhang, Le Niu, Zhu Liu, Fengming Xi
Summary: About two-thirds of global CO2 emissions from the energy and industry sectors are generated in China, accounting for approximately 30% of total global CO2 emissions. These carbon-intensive processes usually produce a large amount of alkaline solid wastes, which have shown great potential to serve as CO2 absorbers. This research estimated the CO2 uptake of 7 types of alkaline solid wastes produced in China between 1930 and 2020 and found that cumulatively, 1099.51 Mt CO2 had been sequestered by natural carbonation. The results indicate that the natural carbonation of such waste can reduce the carbon footprint of the corresponding industrial and agroforestry processes.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Environmental Sciences
A. Korosa, N. Mali
Summary: This study used active carbon fibre (ACF) passive sampling and multivariate statistical processing to predict the occurrence of organic compounds (OCs) in groundwater and determine the origins of various anthropogenic activities. The research provides insights into controlling OCs in groundwater and offers a holistic approach for understanding the vulnerability of shallow groundwater to contamination.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Environmental Sciences
Kenneth Skrable, George Chabot, Clayton French
Summary: After the Industrial Revolution, the increase in atmospheric CO2 levels due to fossil fuel burning has been a major concern. However, research shows that the increase in CO2 since 1800 is not solely caused by anthropogenic fossil components, and the role of exchange reservoirs should not be overlooked.
Article
Meteorology & Atmospheric Sciences
Peng Wang, Weijian Zhou, Xiaohu Xiong, Shugang Wu, Zhenchuan Niu, Yunlong Yu, Jinzhao Liu, Tian Feng, Peng Cheng, Hua Du, Xuefeng Lu, Ning Chen, Yaoyao Hou
Summary: This study estimates the source contributions of CO2 emissions in Chinese megacities by conducting regular observations of atmospheric CO2 mixing ratio and carbon isotope compositions in Xi'an and Beijing during winter. The results show that fossil-fuel sources, particularly coal combustion in Xi'an and natural-gas combustion in Beijing, account for the majority of CO2 emissions in both cities.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2022)
Article
Environmental Sciences
Cheng Sun, Qilin Yu, Zhiqiang Zhao, Yaobin Zhang
Summary: In this study, the CO2 fixation of photosynthetic bacteria was enhanced in the dark through extracellular electron uptake from the electrode. The electrochemical activity of the bacteria was found to increase, possibly due to structural modifications of protein-like substances, resulting in enhanced proton-coupled electron transfer. This study suggests that electrostimulation of extracellular respiration can maintain photosynthesis in the dark.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Instruments & Instrumentation
Kari M. Finstad, Megan M. Smith, Georges Beaudoin, Gregory M. Dipple, Roger D. Aines
Summary: Carbon mineralization is a process that can sequester atmospheric CO2 and mitigate climate warming. This study explores the use of radiocarbon dating to verify that the carbon incorporated into carbonate minerals during mineralization is indeed atmospheric in origin. The results demonstrate the effectiveness of this technique for verifying atmospheric carbon reduction.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2023)
Article
Environmental Sciences
R. M. McDonald, P. A. Moore, M. Helbig, J. M. Waddington
Summary: Climate-mediated drying can reduce gross primary productivity (GPP) and increase ecosystem respiration (ER) in shallow Boreal Shield peatlands, making them vulnerable to a weaker carbon sink function and potential net carbon loss.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2023)
Article
Materials Science, Multidisciplinary
Ellen Synnove Skilbred, Simona Palencsar, Arne Dugstad, Roy Johnsen
Summary: The hydrogen uptake of carbon steel wires in a corrosive environment was measured. It was found that the accumulation of retained carbide decreased the hydrogen uptake for most materials, except for the material with the lowest carbon content. Additionally, the hydrogen uptake increased with higher carbon content, possibly due to hydrogen trapping on ferrite-cementite interfaces.
Article
Meteorology & Atmospheric Sciences
Wei He, Fei Jiang, Weimin Ju, Brendan Byrne, Jingfeng Xiao, Ngoc Tu Nguyen, Mousong Wu, Songhan Wang, Jun Wang, Christian Roedenbeck, Xing Li, Marko Scholze, Guillaume Monteil, Hengmao Wang, Yanlian Zhou, Qiaoning He, Jing M. Chen
Summary: The capacity of atmospheric CO2 inverse models (AIMs) to monitor drought impacts on the European carbon uptake is uncertain. Global inversions with limited surface CO2 observations give divergent estimates of drought impacts. Regional inversions assimilating denser CO2 observations and satellite XCO2 or assimilated environmental variables plus surface CO2 observations better capture carbon uptake anomalies induced by droughts. Surface CO2 observations may still be too sparse, and satellite XCO2 and ancillary environmental data can improve observational constraints in atmospheric inversion systems.
JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS
(2023)
Editorial Material
Chemistry, Inorganic & Nuclear
Pradeep K. Aggarwal, Luis J. Araguas, Leonard I. Wassenaar
ISOTOPES IN ENVIRONMENTAL AND HEALTH STUDIES
(2016)
Article
Geosciences, Multidisciplinary
Pradeep K. Aggarwal, Ulrike Romatschke, Luis Araguas-Araguas, Dagnachew Belachew, Frederick J. Longstaffe, Peter Berg, Courtney Schumacher, Aaron Funk
Article
Biochemical Research Methods
L. I. Wassenaar, B. Kumar, C. Douence, D. L. Belachew, P. K. Aggarwal
RAPID COMMUNICATIONS IN MASS SPECTROMETRY
(2016)
Article
Chemistry, Inorganic & Nuclear
Leonard I. Wassenaar, Liang-Feng Han, Thomas Schiefer, Gustav Kainz, Luis Araguas-Araguas, Pradeep K. Aggarwal
ISOTOPES IN ENVIRONMENTAL AND HEALTH STUDIES
(2018)
Article
Geochemistry & Geophysics
Roberto Gonfiantini, Leonard I. Wassenaar, Luis Araguas-Araguas, Pradeep K. Aggarwal
GEOCHIMICA ET COSMOCHIMICA ACTA
(2018)
Article
Biochemical Research Methods
L. I. Wassenaar, S. Terzer-Wassmuth, C. Douence, L. Araguas-Araguas, P. K. Aggarwal, T. B. Coplen
RAPID COMMUNICATIONS IN MASS SPECTROMETRY
(2018)
Article
Biochemical Research Methods
Leonard I. Wassenaar, Cedric Douence, Mark A. Altabet, Pradeep K. Aggarwal
RAPID COMMUNICATIONS IN MASS SPECTROMETRY
(2018)
Article
Geochemistry & Geophysics
Liang-Feng Han, L. Niel Plummer, Pradeep Aggarwal
Article
Engineering, Environmental
Leonard I. Wassenaar, Tyler B. Coplen, Pradeep K. Aggarwal
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2014)
Article
Water Resources
Brent D. Newman, Luis J. Araguas-Araguas, Pradeep K. Aggarwal
HYDROLOGICAL PROCESSES
(2013)
Article
Water Resources
Robert L. Michel, Pradeep Aggarwal, Luis Araguas-Araguas, Turker Kurttas, Brent D. Newman, Tomas Vitvar
HYDROLOGICAL PROCESSES
(2015)
Article
Geosciences, Multidisciplinary
Pradeep K. Aggarwal, Takuya Matsumoto, Neil C. Sturchio, Hung K. Chang, Didier Gastmans, Luis J. Araguas-Araguas, Wei Jiang, Zheng-Tian Lu, Peter Mueller, Reika Yokochi, Roland Purtschert, Thomas Torgersen
Article
Engineering, Civil
Hung K. Chang, Roger D. Goncalves, Pradeep K. Aggarwal, Marcia R. Stradioto, Emilio C. B. Hespanhol, Neil C. Sturchio, Ulrike Romatschke, Luis J. A. Araguas
JOURNAL OF HYDROLOGY
(2020)
Article
Geosciences, Multidisciplinary
J. Halder, S. Terzer, L. I. Wassenaar, L. J. Araguas-Araguas, P. K. Aggarwal
HYDROLOGY AND EARTH SYSTEM SCIENCES
(2015)