Article
Energy & Fuels
Qiong Wang, Hao Xu, Dazhen Tang, Pengfei Ren
Summary: This study investigates the composition and formation mechanisms of coalbed gas (CBG) in the Miquan and Fukang areas of the southern Junggar Basin. It is found that there are significant differences in the CBG composition between the two areas. The CBG in the Fukang area is mainly methane, while the CBG in the Miquan area has a high CO2 concentration. The production pathways of biogas also differ between the two areas, with the Fukang area mainly using the CO2 reduction pathway and the Miquan area mainly using the acetic acid/methyl fermentation pathway. This study clarifies the fate of CO2 in the Miquan area and highlights the influence of exogenous CO2 on microbial methanogenic pathways.
Article
Environmental Sciences
Evgeniya Golovatskaya, Liliya Nikonova, Galina Simonova, Daria Kalashnikova
Summary: This study examines the decomposition of litter from Sphagnum fuscum and Eriophorum vaginatum in drained and post-pyrogenic sites over a period of 3 years. The results show that Sph. fuscum decomposes at a slower rate and has a lower transformation rate compared to E. vaginatum. δ C-13 values indicate C-13 enrichment during the decomposition of Sphagnum residues and C-12 enrichment during the decomposition of E. vaginatum.
Article
Environmental Sciences
Nur Azima Busman, Lulie Melling, Kah Joo Goh, Yazid Imran, Faustina E. Sangok, Akira Watanabe
Summary: Information on temporal and spatial variations in soil greenhouse gas (GHG) fluxes from tropical peat forests is essential to predict the influence of climate change and estimate the effects of land use on global warming and the carbon (C) cycle. Measurement of soil CO2 and CH4 fluxes, as well as analysis of soil physicochemical properties and environmental variables, were conducted in three major forest types in Malaysia for eight years. The results showed that there were variations in soil CO2 and CH4 fluxes between different forest sites, and the variations were influenced by factors such as groundwater level, soil properties, and temperature.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Chemistry, Multidisciplinary
Xiao Chen, Shuaiqiang Jia, Chunjun Chen, Jiapeng Jiao, Jianxin Zhai, Ting Deng, Cheng Xue, Hailian Cheng, Mengke Dong, Wei Xia, Jianrong Zeng, Xueqing Xing, Haihong Wu, Mingyuan He, Buxing Han
Summary: This study presents a novel layered coordination polymer (CuPEDOT) that stabilizes Cu2+ ions by coordinating with 3,4-ethylenedioxythiophene (EDOT), enabling selective and efficient reduction of CO2 to CH4. The CuPEDOT catalyst maintains its stable structure during CO2RR and promotes the hydrogenation of *CO intermediates, favoring the formation of CH4 over dimerization to C-2 products.
ADVANCED MATERIALS
(2023)
Article
Environmental Sciences
Lei Wang, Cun-De Xiao, Zhi-Heng Du, Damien T. Maher, Jing-Feng Liu, Zhi-Qiang Wei
Summary: Inland waters serve as significant sources of greenhouse gases to the atmosphere, with high-altitude saline lakes on the Tibetan Plateau showing high CH4 concentrations as sources to the atmosphere but acting as sinks for CO2. Salinity, fDOM, temperature, and dissolved oxygen are key factors influencing CH4 and CO2 diffusive fluxes in these lakes, with a distinctly different isotopic source values of CO2 and CH4 found in Qinghai Lake and Hala Lake.
ADVANCES IN CLIMATE CHANGE RESEARCH
(2022)
Article
Environmental Sciences
Patrick Guth, Chuanyu Gao, Klaus-Holger Knorr
Summary: The availability of terminal electron acceptors (TEAs) in organic soils plays a crucial role in determining the ratio of CO2 to CH4 formation under anoxic conditions. This study investigated the redox properties of organic matter in a range of peat samples and found that electron accepting capacities (EACs) are the most important redox buffer for suppressing methanogenesis in peat soils. The study also demonstrated that the electron budgets, including EAC of organic matter, can largely explain anaerobic CO2 production.
GLOBAL BIOGEOCHEMICAL CYCLES
(2023)
Article
Biodiversity Conservation
Xiao-Ying Ma, Hao Xu, Zi-Yin Cao, Lei Shu, Rui-Liang Zhu
Summary: The impact of climate change on the habitat suitability of Sphagnum mosses is poorly understood. Using the MaxEnt model, this study predicts the potential geographic distribution of six dominant Sphagnum species in future climate scenarios. The results show that warming temperatures will cause a northward migration of Sphagnum mosses into high-latitude boreal peatlands while decreasing their habitat suitability beyond these regions.
GLOBAL CHANGE BIOLOGY
(2022)
Article
Environmental Sciences
Hongyang Chen, Xiao Xu, Changming Fang, Bo Li, Ming Nie
Summary: Global wetland CH4 emissions are more sensitive to temperature changes than CO2 emissions, with water table depth affecting the temperature dependence of CH4 emissions but not CO2 emissions. Climate change may lead to increased CH4 emissions from wetlands compared to CO2 emissions, as CH4 emissions appear to be more sensitive to temperature.
NATURE CLIMATE CHANGE
(2021)
Article
Green & Sustainable Science & Technology
Na Guo, Shijie Lv, Guangyi Lv, Xuebao Xu, Hongyun Yao, Zhihui Yu, Xiao Qiu, Zhanyi Wang, Chengjie Wang
Summary: The study found that warming and increased precipitation had significant impacts on soil CO2 efflux and stable carbon isotopes. Warming stimulated an increase in CO2 efflux, while increased precipitation led to a decrease in stable carbon isotopes.
Article
Chemistry, Applied
Fumikazu Akamatsu, Hideaki Shimizu, Yukari Igi, Aya Kamada, Kazuya Koyama, Osamu Yamada, Nami Goto-Yamamoto
Summary: This study found a large variation in sugar δC-13 values of Chardonnay grapes grown in Japan, depending on the δC-13 values and content of monosaccharides. Carbon isotope discrimination can be used to predict sugar δC-13 values in the original must.
Article
Geography, Physical
Kristina A. Da Silva, Rebecca A. Snyder, Maara S. Packalen, James W. McLaughlin, Dorothy M. Peteet, Sarah A. Finkelstein
Summary: The Hudson Bay Lowlands in Canada's boreal subarctic is a significant peatland region that is currently experiencing climate warming and anthropogenic stressors. A study conducted on a peat core from the region revealed the impact of climate variability and multiple stressors on peat accumulation. The findings suggest that mineral nutrients, supplied by surface hydrology or eolian deposition, played a role in carbon accumulation in the peatland.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2022)
Article
Thermodynamics
Haorui Liu, Shuoyu Wang, Xiaoqiong Wang, XiaoJing Feng, Shuixia Chen
Summary: A stable porous solid amine adsorbent was prepared using high internal phase emulsion (HIPE) template method and impregnation-crosslinking method, exhibiting higher adsorption capacity and better adsorption kinetics in wet conditions, making it suitable for gas separation. The adsorbent showed excellent CO2/CH4 separation selectivity and high operating capacity, along with superior regeneration performance.
Article
Chemistry, Inorganic & Nuclear
Chaohui He, Peng Zhang, Sai Ma, Yujuan Zhang, Tuoping Hu
Summary: Developing ultra-stable adsorbents with high CO2 adsorption performance is an effective solution for the separation of CO2/CH4 and CO2/N-2.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Applied
Fumikazu Akamatsu, Tsutomu Fujii, Yukari Igi, Akiko Fujita, Osamu Yamada, Atsuko Isogai
Summary: This study analyzed the carbon stable isotopic composition of CO2 bubbles in sparkling sake to determine its authenticity. The results showed that the carbon source of the CO2 bubbles differed between sparkling sake manufactured using natural carbonation and those using exogenous carbonation. Carbon stable isotope analysis of CO2 bubbles can contribute to determining the authenticity of sparkling sake.
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
(2022)
Article
Soil Science
Kevan J. Minick, Bhaskar Mitra, Xuefeng Li, Milan Fischer, Maricar Aguilos, Prajaya Prajapati, Asko Noormets, John S. King
Summary: This study investigated the effects of temperature, moisture, and microtopography on the potential net CO2 and CH4 production in peat soils from a freshwater forested wetland in coastal North Carolina, USA. The results showed that hummocks had the highest cumulative potential net CO2 and CH4 production and enzyme activity, and fully saturated soils had lower potential net CO2 production but significantly higher potential net CH4 production compared to non-saturated soils. The study also found that soils incubated at higher temperatures increased both potential net CO2 and CH4 production, and peroxidase activity was positively correlated with CH4 production, suggesting its importance in providing fermented C substrates to acetoclastic methanogenic communities.
Article
Geography, Physical
Jonathan A. Holmes, Markus Leuenberger, Karen Molloy, Michael O'Connell
Article
Geography, Physical
Samuel L. Nicholson, Alistair W. G. Pike, Rob Hosfield, Nick Roberts, Diana Sahy, Jon Woodhead, Hai Cheng, R. Lawrence Edwards, Stephane Affolter, Markus Leuenberger, Stephen J. Burns, Albert Matter, Dominik Fleitmann
QUATERNARY SCIENCE REVIEWS
(2020)
Article
Geochemistry & Geophysics
Elaheh Ghadiri, Stephane Affolter, Matthias S. Brennwald, Dominik Fleitmann, Anamaria D. Hauselmann, Hai Chengg, Colin Maden, Markus Leuenberger, Rolf Kipfer
EARTH AND PLANETARY SCIENCE LETTERS
(2020)
Article
Environmental Sciences
Stephane Affolter, Philipp Steinmann, Franziska Aemisegger, Roland Purtschert, Markus Leuenberger
JOURNAL OF ENVIRONMENTAL RADIOACTIVITY
(2020)
Article
Geosciences, Multidisciplinary
Tito Arosio, Malin Michelle Ziehmer-Wenz, Kurt Nicolussi, Christian Schluechter, Markus Leuenberger
FRONTIERS IN EARTH SCIENCE
(2020)
Article
Geosciences, Multidisciplinary
S. Ranjan, AL. Ramanathan, Tirumalesh Keesari, Virendra B. Singh, Naveen Kumar, Manish Pandey, Markus C. Leuenberger
Summary: This study aims to investigate the source and transportation of water vapour in the western Himalayan region using water vapour stable isotopes and air mass trajectory diagnostics. Results show significant diurnal variations in water vapour isotopes in the Chhota Shigri region, influenced by meteorological parameters and exhibiting differences compared to nearby regions. The findings demonstrate the impact of local moisture recycling on isotopic composition and highlight the importance of considering evaporative conditions in moisture uptake and loss.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Forestry
Marco M. Lehmann, Valentina Vitali, Philipp Schuler, Markus Leuenberger, Matthias Saurer
Summary: The analysis of stable carbon and oxygen isotopes in tree-rings is a common method to study past climatic conditions and tree physiological responses to environmental changes. While hydrogen isotopic signature in tree-rings is less utilized due to poor correlation with climate, recent studies have shown its potential in revealing physiological information during stressful periods, independently of biotic and abiotic factors.
Article
Geosciences, Multidisciplinary
Markus C. Leuenberger, Shyam Ranjan
Summary: Since 1971, water isotope measurements have been conducted at various locations in Switzerland by the Climate and Environmental Physics Division at the University of Bern. The study investigates the effects of meteorological parameters such as temperature, turbulence factor, and humidity on the water isotopes through the analysis of isotope ratios.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Geosciences, Multidisciplinary
Shyam Ranjan, Markus C. Leuenberger
Summary: A modified online continuous flow method has been developed to improve the precision of triple oxygen isotope analysis compared to off-line methods. The study found that a commercially available laser-based system has significantly better precision than the improved online CoF3 conversion method using mass spectrometry. The research also identified factors affecting precision in the continuous flow system, providing space for further improvement.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Geosciences, Multidisciplinary
Stephane Affolter, Markus C. Leuenberger
Summary: Water isotopes are powerful proxies that provide valuable information about past climate conditions. The main challenge lies in improving measurement precision for more reliable results.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Meteorology & Atmospheric Sciences
Ioannis Katharopoulos, Dominik Brunner, Lukas Emmenegger, Markus Leuenberger, Stephan Henne
Summary: This article investigates the influence of turbulence parameterization in Lagrangian particle dispersion models (LPDMs) and proposes a new parameterization method to address the issue of double-counting in high-resolution simulations. The results show that the new parameterization improves the model's ability to predict observed tracer variability and concentration, resulting in a more realistic simulation of tracer concentration peaks.
BOUNDARY-LAYER METEOROLOGY
(2022)
Article
Ecology
Tito Arosio, Malin M. Ziehmer, Kurt Nicolussi, Christian Schluchter, Markus Leuenberger
Article
Meteorology & Atmospheric Sciences
Ece Satar, Peter Nyfeler, Bernhard Bereiter, Celine Pascale, Bernhard Niederhauser, Markus Leuenberger
ATMOSPHERIC MEASUREMENT TECHNIQUES
(2020)
Article
Meteorology & Atmospheric Sciences
Ece Satar, Peter Nyfeler, Celine Pascale, Bernhard Niederhauser, Markus Leuenberger
ATMOSPHERIC MEASUREMENT TECHNIQUES
(2020)
Article
Meteorology & Atmospheric Sciences
Tesfaye A. Berhanu, John Hoffnagle, Chris Rella, David Kimhak, Peter Nyfeler, Markus Leuenberger
ATMOSPHERIC MEASUREMENT TECHNIQUES
(2019)
Article
Geochemistry & Geophysics
Xinze Lu, Geoffrey J. Gilleaudeau, Brian Kendall
Summary: The Late Ordovician mass extinction is the first major extinction event in the Phanerozoic, but the reasons for the decline in global biodiversity before the extinction are not well understood.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2024)
Article
Geochemistry & Geophysics
Junyao Kang, Daniel D. Gregory, Benjamin Gill, Shiqiang Huang, Changxin Lai, Zhaoshan Chang, Huan Cui, Ivan Belousov, Shuhai Xiao
Summary: Sedimentary pyrite is an important geological archive, but it can be altered by diagenetic and hydrothermal processes. This study successfully trained machine learning algorithms to distinguish pyrite origins using trace element data. The approach was validated and applied to identify the origins of pyrite in two sedimentary successions in South China.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2024)