Review
Geosciences, Multidisciplinary
Magdalena Diak, Michael Ernst Boettcher, Catia Milene Ehlert von Ahn, Wei-Li Hong, Monika Kedra, Lech Kotwicki, Katarzyna Koziorowska-Makuch, Karol Kulinski, Aivo Lepland, Przemyslaw Makuch, Arunima Sen, Aleksandra Winogradow, Marc Juergen Silberberger, Beata Szymczycha
Summary: This study reviews the interactions between permafrost and groundwater, with a focus on recharge and discharge in the Arctic and the Qinghai-Tibet Plateau. It found that the geochemical composition of groundwater is site-specific and varies within aquifers, reflecting water-rock interactions. The study also observed that permafrost thaw increases groundwater discharge on land, and climate warming is likely to accelerate permafrost degradation and enhance hydrological connectivity. With regards to submarine groundwater discharge, the impact of permafrost thaw can either reinforce or reduce it, depending on the changes in aquifer pressure. The study highlights the need for long-term interdisciplinary in situ measurements for accurate predictions of groundwater flow and permafrost dynamics in a warmer climate.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Energy & Fuels
O. S. Gaidukova, V. V. Dorokhov, S. Y. Misyura, V. S. Morozov, N. E. Shlegel, P. A. Strizhak
Summary: The dissociation and combustion of methane hydrate samples were experimentally studied under different thermal conditions. The synergistic effects of simultaneously dissociating methane and carbon dioxide hydrates were analyzed. It was found that ignition of methane hydrate granules was faster than tablets, and increasing the combustion chamber temperature improved the ignition performance of tablets.
Article
Environmental Sciences
Martin A. Briggs, Julia A. Cantelon, Barret L. Kurylyk, Justin T. Kulongoski, Audrey Mills, John W. Lane
Summary: Freshwater lenses beneath small ocean islands show spatial variability and temporal fluctuations, influenced by factors such as groundwater salinization and geological changes. Study on Palmyra Atoll reveals significant contraction of freshwater lens volume during dry cycles, posing threats to ecosystem management.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Jiawei Liu, Yuanqing Chen, Yiqing Wang, Mengran Du, Zijun Wu
Summary: This study investigated greenhouse gas emissions in a maricultural bay in north-eastern Hainan Island, China, and found that both submarine groundwater discharge and mariculture activities influenced the emissions. The emissions varied with tidal fluctuations and the main mechanism of methane emissions was acetate fermentation. The study highlights the importance of considering the link between submarine groundwater discharge and greenhouse gas emissions in maricultural bays when constraining global greenhouse gas fluxes.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Geosciences, Multidisciplinary
Yi Liu, Yurong Song, Jiu Jimmy Jiao
Summary: Coastal ocean acidification is a global problem due to climate change, and the study reveals a close relationship between submarine groundwater discharge (SGD) and coastal ocean acidification in Hong Kong's coastal waters. The direct influence of SGD on seawater pH decline is evaluated for the first time, and the results show that SGD contributes significantly to seawater pH variation through direct input of carbonate species. In addition, SGD also affects seawater pH through nutrient loadings. Understanding and managing groundwater is crucial in mitigating coastal ocean acidification.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Limnology
Yvonne Y. Y. Yau, Pei Xin, Xiaogang Chen, Lucheng Zhan, Mitchell Call, Stephen R. Conrad, Christian J. Sanders, Linwei Li, Jinzhou Du, Isaac R. Santos
Summary: Saltmarshes are important blue carbon ecosystems that accumulate a large amount of organic carbon in sediments. This study found that the export of alkalinity into the ocean from saltmarshes can be comparable to organic carbon burial, contributing to the ocean buffering capacity and long-term carbon storage.
LIMNOLOGY AND OCEANOGRAPHY
(2022)
Article
Engineering, Environmental
Byeonggwan Lee, Kyuchul Shin, Sanehiro Muromachi, Igor L. Moudrakovski, Christopher I. Ratcliffe, John A. Ripmeester
Summary: Antifreezes such as methanol and ammonia can enhance methane storage in binary clathrate hydrates like THF and TBAB. Methanol acts as a catalyst for methane hydrate formation and induces TBAB hydrates to form an orthorhombic structure suitable for methane storage. These findings suggest that methanol could play a crucial role in hydrate-based methane storage systems.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Environmental Sciences
Julia A. Guimond, Cansu Demir, Barret L. Kurylyk, Michelle A. Walvoord, James W. Mcclelland, M. Bayani Cardenas
Summary: Groundwater discharge to the ocean along Arctic coastlines plays a significant role in carbon budgets and water quality. This study investigates the magnitude and drivers of groundwater discharge to Alaska's Beaufort Sea coast using unique coastal Arctic groundwater timeseries data. The results reveal temporally variable groundwater fluxes driven by wind-driven lagoon water level changes, with implications for nearshore biogeochemistry.
ENVIRONMENTAL RESEARCH LETTERS
(2023)
Article
Ecology
Poornima Unnikrishnan, Reji Srinivas, Murugan Ramasamy, D. S. Suresh Babu
Summary: The study investigated submarine groundwater discharge and its behavior influenced by coastal geomorphology and geology. Numerical models were developed to estimate the magnitude of SGD from different catchments on the Southwest coast of India. The results showed significant differences in SGD flux between catchments, with potential implications for designing aquifer recharge options and optimum pumping quantities.
REGIONAL STUDIES IN MARINE SCIENCE
(2021)
Article
Energy & Fuels
Alejandro Bello-Palacios, Per Fotland, Geir Ersland
Summary: This study investigates the relationships between sedimentation rate, transport properties, and the formation and evolution of hydrates in fine-grained marine sediments, as well as their corresponding BSR responses. Through one-dimensional simulations, the study models the flow and transport of mass and heat through porous media during sedimentation. The results show that sedimentation affects the geothermal gradient and the stability zone of gas hydrates, leading to changes in the distribution of phases and the relocation of the base of the GHSZ over geological time.
Review
Environmental Sciences
Shan Jiang, Juan Severino Pino Ibanhez, Ying Wu, Jing Zhang
Summary: Submarine groundwater discharge is an important mechanism for delivering land-borne solutes to coastal oceans, but it may also pose challenges such as eutrophication and harmful algae blooms. Geophysical and geochemical tracers play key roles in studying SGD, but there are still challenges to be addressed. It is necessary to combine different tracer methods to study the impacts of factors like climate change on SGD.
ENVIRONMENTAL REVIEWS
(2021)
Article
Environmental Sciences
Colin J. Whyte, Avner Vengosh, Nathaniel R. Warner, Robert B. Jackson, Karlis Muehlenbachs, Franklin W. Schwartz, Thomas H. Darrah
Summary: Extensive development of horizontal drilling and hydraulic fracturing has increased energy production but also raised concerns about drinking-water quality in areas of shale-gas development. This study focuses on the potential contamination of groundwater in the Trinity Aquifer in Parker County, Texas, presenting a comprehensive geochemical dataset collected across three sampling campaigns.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Geosciences, Multidisciplinary
Jinfeng Chang, Shushi Peng, Yi Yin, Philippe Ciais, Petr Havlik, Mario Herrero
Summary: The livestock sector is the largest source of anthropogenic methane emissions and efforts to improve production efficiency have led to a decrease in emission intensity for most livestock categories globally. While promoting balanced diets is important, parallel efforts to improve production efficiency are more effective in mitigating livestock methane emissions.
Article
Environmental Sciences
Sruthy Sajeev, P. Muthukumar, S. Selvam
Summary: Submarine groundwater discharge (SGD) is the combo of fresh and saline groundwater flux entering marine systems in Asia, including China, Japan, South Korea, Southeast Asia, and India. SGD plays a crucial role in providing fresh water and transporting pollutants and nutrients. However, more research on SGD in India is needed as groundwater extraction for various purposes increases, potentially affecting the coastal aquifers.
Article
Environmental Sciences
Vladimir Kutcherov, Daniil Kudryavtsev, Aleksandr Serovaiskii
Summary: The concentration of carbon dioxide and methane in the atmosphere has significantly increased in the past 60 years. Thawing of gas hydrates, especially in the Arctic shelf, is a major contributor to the growth of methane and its homologue emissions. The oxidation of methane and light-saturated hydrocarbons by ozone leads to the formation of carbon dioxide. The correlation between methane and carbon dioxide concentrations in the atmosphere suggests that methane released from gas hydrates in the Arctic shelf zone has become a significant source of carbon dioxide in the atmosphere. The large amount of hydrocarbons in gas hydrate deposits poses a serious challenge for future evolution of this process.
