Article
Environmental Sciences
Jeong gu Lee, Ho Gyeong Chae, Gil Won Kim, Pil Joo Kim, Song Rae Cho
Summary: Plastic film mulching can significantly increase crop productivity and net primary production, but it also leads to an increase in greenhouse gas emissions, resulting in a higher net global warming potential. Additionally, mulching can decrease soil carbon stock and increase carbon loss, but this negative impact can be alleviated with higher levels of biomass addition.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Microbiology
Xi Xiao, Min Luo, Chuwen Zhang, Tingting Zhang, Xiuran Yin, Xuemin Wu, Jing Zhao, Jun Tao, Zongheng Chen, Qianyong Liang, Xiyang Dong
Summary: Metal-dependent anaerobic oxidation of methane (AOM) was found to be an important methane sink in methanic cold seep sediments in the northern continental slope of the South China Sea. Diverse anaerobic methanotrophic archaea (ANME) groups were identified to actively mediate methane oxidation, potentially in syntrophy with metal reducers. Fe-AOM and Mn-AOM were estimated to account for about 3% of total methane removal in the sediments.
MICROBIOLOGY SPECTRUM
(2023)
Article
Energy & Fuels
Prashant Jadhawar, Jinhai Yang, Antonin Chapoy, Bahman Tohidi
Summary: This study investigates CO2 sequestration and storage into methane (CH4) hydrate sediments, examining the replacement of CH4 by CO2 in hydrates under varying thermodynamic conditions at both the macroscale and microscale levels. The results show high CH4 gas recovery within HSZ-II, while higher water saturation conditions diminish this recovery. In addition, significant CH4 production is obtained deep inside HSZ-I with the application of inhibitors. Our novel microscale micromodel evaluations reveal the release of CH4 gas through convection, slow CO2 diffusive mass transfer, and CO2-CH4 replacement within HSZ-I.
Article
Agriculture, Multidisciplinary
Ping Yang, Kam W. Tang, Hong Yang, Chuan Tong, Nan Yang, Derrick Y. F. Lai, Yan Hong, Manjing Ruan, Yingying Tan, Guanghui Zhao, Ling Li, Chen Tang
Summary: This study assessed the carbon footprint of aquaculture ponds in southeastern China and found that planktonic primary production and commercial feeds were the main carbon inputs, while planktonic respiration and sedimentation were the major carbon outputs. Water-to-air emissions of carbon greenhouse gases were low, but varied among the ponds. Methane emissions from the ponds were higher than some other agro-ecosystems. The findings suggest that improving production efficiency and reducing carbon-rich detritus accumulation can help minimize the climatic warming impacts of aquaculture production.
AGRICULTURE ECOSYSTEMS & ENVIRONMENT
(2022)
Review
Energy & Fuels
Nasiru Salahu Muhammed, Md Bashirul Haq, Dhafer Abdullah Al Shehri, Amir Al-Ahmed, Mohammad Mizanur Rahman, Ehsan Zaman, Stefan Iglauer
Summary: The future of hydrogen depends on large-scale storage, which can be provided by geological formations. Depleted natural gas reservoirs are the most cost-effective and secure solutions, but there is a lack of thorough understanding of this technology. This work aims to provide a comprehensive insight into hydrogen storage in depleted gas reservoirs.
Article
Engineering, Environmental
Yuanyuan Zhang, Youheng Su, Zhe Li, Shuhui Guo, Lunhui Lu, Bin Zhang, Yu Qin
Summary: This study explores the impact of reservoir operation on particulate organic carbon (POC) and methane (CH4) in cascade hydroelectric reservoirs. The results show that reservoir operation significantly affects the transport of POC and accumulation of CH4, where mineral POC is more likely to drive CH4 accumulation.
Article
Engineering, Civil
Wenqing Shi, Taylor Maavara, Qiuwen Chen, Jianyun Zhang, Jinren Ni, Daniele Tonina
Summary: This study investigated the greenhouse gas (GHG) emissions in a cascade hydropower system in the upper Mekong River, China. The results showed that GHG emissions were higher in cascade reservoirs compared to the upstream channel due to accumulated sediments. CO2 was the largest contributor to total CO2-eq, while N2O had a minimal contribution. The most upstream reservoir emitted the most CH4, possibly due to sediment accumulation.
JOURNAL OF HYDROLOGY
(2023)
Article
Computer Science, Interdisciplinary Applications
Yves T. Prairie, Sara Mercier-Blais, John A. Harrison, Cynthia Soued, Paul del Giorgio, Atle Harby, Jukka Alm, Vincent Chanudet, Roy Nahas
Summary: Human-made reservoirs are significant sources of greenhouse gases, but estimating their emissions has been challenging. The G-res Tool provides a unique modelling framework to accurately estimate the net carbon footprint of reservoirs globally, predicting emissions changes over time while accounting for natural GHG pathways in aquatic networks.
ENVIRONMENTAL MODELLING & SOFTWARE
(2021)
Article
Geosciences, Multidisciplinary
Qian Li, Sebastien Gogo, Fabien Leroy, Christophe Guimbaud, Fatima Laggoun-Defarge
Summary: The study found that simulated warming had a significant impact on the carbon fluxes in peatlands, particularly enhancing plant growth and increasing gross primary production. However, short-term experimental warming did not have a significant effect on annual net ecosystem carbon exchange and the carbon budget.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Environmental Sciences
Debin Wu, Yuan Zhao, Lei Cheng, Zhuo Zhou, Qiusheng Wu, Qian Wang, Quan Yuan
Summary: This study found that sediment organic carbon content is positively correlated with methane production rates in cascade hydropower reservoirs, but not significantly correlated with total CO2 production rates. The anaerobic decomposition rates of sediments do not significantly increase along with the increase of SOC content.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Forestry
Jian Lin, Javier G. P. Gamarra, John E. Drake, Anibal Cuchietti, Ruth D. Yanai
Summary: Quantifying uncertainty in forest assessments is challenging due to various sources of error and approaches to propagation. Model fit uncertainty is more important than uncertainty in individuals when dealing with large-scale assessments. Four different approaches to representing model uncertainty were compared and found to be in good agreement. Uncertainty in model fit did not vary with the number of trees in the inventory, while uncertainty in predicting individuals was higher with smaller numbers of trees. The importance of uncertainty sources varied with forest type, with larger importance in poor model fit situations. Both sources of allometric uncertainty should be accounted for, but when large numbers of individuals are involved, the contribution of uncertainty in predicting individuals can be ignored.
FOREST ECOLOGY AND MANAGEMENT
(2023)
Article
Environmental Sciences
Cheng Hu, Junqing Zhang, Bing Qi, Rongguang Du, Xiaofei Xu, Haoyu Xiong, Huili Liu, Xinyue Ai, Yiyi Peng, Wei Xiao
Summary: Atmospheric CH4 is the second-largest anthropogenic contributor to global warming. However, its emissions, components, spatial-temporal variations, and projected changes still remain largely uncertain from city to national scales. Therefore, it is crucial to consider temperature-dependent EFs and the positive feedback between global warming and CH4 emissions in future CH4 emission projections and climate change models.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Environmental Sciences
Xi Zhang, Yunping Xu, Wenjie Xiao, Meixun Zhao, Zicheng Wang, Xuchen Wang, Liping Xu, Min Luo, Xinxin Li, Jiasong Fang, Yin Fang, Yasong Wang, Kazumasa Oguri, Frank Wenzhoefer, Ashley A. Rowden, Siddhartha Mitra, Ronnie N. Glud
Summary: Black carbon accumulation rates in hadal trenches in the deepest regions of the oceans could be seven-fold higher than the global ocean average, according to geochemical and isotopic analyses of sediments from six trenches in the Pacific Ocean.
COMMUNICATIONS EARTH & ENVIRONMENT
(2022)
Article
Environmental Sciences
John A. Harrison, Yves T. Prairie, Sara Mercier-Blais, Cynthia Soued
Summary: The study shows that CH4 fluxes from reservoirs are much larger than previously recognized, while CO2 emissions are similar to past reports. Global reservoir GHG fluxes are higher than suggested by previous studies by over 29%, with dominant emissions pathways varying in different regions. Additionally, GHG fluxes are highly sensitive to input parameters that may be influenced by climate change in the future.
GLOBAL BIOGEOCHEMICAL CYCLES
(2021)
Article
Geosciences, Multidisciplinary
Piers M. Forster, Christopher J. Smith, Tristram Walsh, William F. Lamb, Robin Lamboll, Mathias Hauser, Aurelien Ribes, Debbie Rosen, Nathan Gillett, Matthew D. Palmer, Joeri Rogelj, Karina von Schuckmann, Sonia I. Seneviratne, Blair Trewin, Xuebin Zhang, Myles Allen, Robbie Andrew, Arlene Birt, Alex Borger, Tim Boyer, Jiddu A. Broersma, Lijing Cheng, Frank Dentener, Pierre Friedlingstein, Jose M. Gutierrez, Johannes Guetschow, Bradley Hall, Masayoshi Ishii, Stuart Jenkins, Xin Lan, June-Yi Lee, Colin Morice, Christopher Kadow, John Kennedy, Rachel Killick, Jan C. Minx, Vaishali Naik, Glen P. Peters, Anna Pirani, Julia Pongratz, Carl-Friedrich Schleussner, Sophie Szopa, Peter Thorne, Robert Rohde, Maisa Rojas Corradi, Dominik Schumacher, Russell Vose, Kirsten Zickfeld, Valerie Masson-Delmotte, Panmao Zhai
Summary: IPCC assessments are a trusted source of scientific evidence for climate negotiations, but the time gap between report cycles creates an information gap. To fill this gap, we compile monitoring datasets based on IPCC report methods to provide annually updated reliable global climate indicators.
EARTH SYSTEM SCIENCE DATA
(2023)
Article
Environmental Sciences
Benjamin Hmiel, David R. Lyon, Jack D. Warren, Jevan Yu, Daniel H. Cusworth, Riley M. Duren, Steven P. Hamburg
Summary: This study examines the methane emissions from oil and gas production in the Permian Basin and finds significant variations in emission intensity among different companies. It shows that nearly half of the operators have improved their performance by over 50% from 2019 to 2021.
ENVIRONMENTAL RESEARCH LETTERS
(2023)
Article
Geosciences, Multidisciplinary
Yuzhen Yan, Andrei V. V. Kurbatov, Paul A. A. Mayewski, Sarah Shackleton, John A. A. Higgins
Summary: This study investigates the differences in the correlation between temperature and summer insolation in the Early Pleistocene and the late Pleistocene in Antarctica. The results suggest a more dynamic East Antarctic Ice Sheet in the Early Pleistocene.
Article
Geosciences, Multidisciplinary
Frerk Poppelmeier, Daniel Baggenstos, Markus Grimmer, Zhijun Liu, Jochen Schmitt, Hubertus Fischer, Thomas F. Stocker
Summary: A noble gas-based proxy is used to measure the mean ocean temperature (MOT) by analyzing ancient air in ice cores. The study finds that changes in wind speed, sea-ice extent, and ocean circulation have compensating effects on noble gas saturation, resulting in a slight reduction in noble gas undersaturation during the Last Glacial Maximum (LGM). Considering these effects and ice core measurements, the model suggests a revised MOT difference between the LGM and pre-industrial of -2.1 +/- 0.7 degrees Celsius, which is in better agreement with other temperature reconstructions.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Environmental Sciences
Zachary Barkley, Kenneth Davis, Natasha Miles, Scott Richardson, Aijun Deng, Benjamin Hmiel, David Lyon, Thomas Lauvaux
Summary: According to the US EPA, oil and gas infrastructure emissions contribute 30% of all anthropogenic methane emissions in the US. This study presents continuous monitoring of methane emissions from two oil and gas basins, finding substantial emission rates in both the Delaware and Marcellus basins.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Geosciences, Multidisciplinary
Michaela Muhl, Jochen Schmitt, Barbara Seth, James E. Lee, Jon S. Edwards, Edward J. Brook, Thomas Blunier, Hubertus Fischer
Summary: Air trapped in polar ice provides unique records of past atmospheric composition, including greenhouse gases like methane and short-lived trace gases like ethane and propane. Recent research revealed disagreements in the methane concentration during the last glacial in Greenland ice. By analyzing samples, it was found that elevated alkane concentrations were produced during the melt extraction process of the wet-extraction technique, indicating an abiotic decomposition of organic matter rather than a microbial origin.
CLIMATE OF THE PAST
(2023)
Article
Geosciences, Multidisciplinary
Christo Buizert, Sarah Shackleton, Jeffrey P. Severinghaus, William H. G. Roberts, Alan Seltzer, Bernhard Bereiter, Kenji Kawamura, Daniel Baggenstos, Anais J. Orsi, Ikumi Oyabu, Benjamin Birner, Jacob D. Morgan, Edward J. Brook, David M. Etheridge, David Thornton, Nancy Bertler, Rebecca L. Pyne, Robert Mulvaney, Ellen Mosley-Thompson, Peter D. Neff, Vasilii V. Petrenko
Summary: Researchers have developed a new ice core gas-phase proxy to study large-scale atmospheric circulation through synoptic pressure variability. The proxy, Kr-86(xs), reflects the average synoptic pressure changes over several years, but cannot capture individual short-term weather events. The validation of Kr-86(xs) using Antarctic and Greenland ice cores shows a strong spatial correlation with time-averaged synoptic variability. However, caution is needed in interpreting the proxy due to uncertainties in corrections and limited understanding of firn physics.
CLIMATE OF THE PAST
(2023)
Article
Geography, Physical
Michael N. Dyonisius, Vasilii V. Petrenko, Andrew M. Smith, Benjamin Hmiel, Peter D. Neff, Bin Yang, Quan Hua, Jochen Schmitt, Sarah A. Shackleton, Christo Buizert, Philip F. Place, James A. Menking, Ross Beaudette, Christina Harth, Michael Kalk, Heidi A. Roop, Bernhard Bereiter, Casey Armanetti, Isaac Vimont, Sylvia Englund Michel, Edward J. Brook, Jeffrey P. Severinghaus, Ray F. Weiss, Joseph R. McConnell
Summary: Cosmic rays entering Earth's atmosphere produce secondary particles that interact with minerals like ice and quartz, resulting in the production of carbon-14 (C-14). Understanding the production rates of in situ cosmogenic C-14 is important for deciphering its paleoenvironmental information in ice. This study used ancient ice from Antarctica to determine that 33.7% of cosmogenic C-14 forms as carbon monoxide (CO) and 66.1% forms as carbon dioxide (CO2), with a negligible fraction forming as methane (CH4). The calculated muogenic C-14 production rates in ice are lower than those determined in quartz, which requires further investigation.
Article
Meteorology & Atmospheric Sciences
Lars Machler, Daniel Baggenstos, Florian Krauss, Jochen Schmitt, Bernhard Bereiter, Remo Walther, Christoph Reinhard, Bela Tuzson, Lukas Emmenegger, Hubertus Fischer
Summary: Precision, accuracy, and temporal resolution are crucial for utilizing atmospheric trace gas records in extending ice core records. We present a novel combined system that extracts and simultaneously measures CO2, CH4, and N2O concentrations with high precision and vertical resolution.
ATMOSPHERIC MEASUREMENT TECHNIQUES
(2023)
