Article
Ecology
Christiane Schulz-Zunkel, Martina Baborowski, Thomas Ehlert, Hans D. Kasperidus, Frank Krueger, Peter Horchler, Bernd Neukirchen, Holger Rupp, Mathias Scholz, Lars Symmank, Stephanie Natho
Summary: Floodplains play a crucial role in water purification, with the study showing that the Elbe River floodplains have a good retention of total phosphorous. The lack of spatial detail on hydrological connectivity makes quantifying phosphorous retention in floodplains challenging, emphasizing the importance of sound validation of results.
Article
Geochemistry & Geophysics
Yang Xu, Zhangdong Jin, Long-Fei Gou, Albert Galy, Chenyang Jin, Chen Chen, Chenzi Li, Li Deng
Summary: Carbonate weathering plays a crucial role in regulating the short-term carbon cycle and global climate. Riverine magnesium isotopes show a sensitive response to carbonate weathering, with potential to be a robust tracer. Studies in the Yangtze River drainage basin suggest that riverine delta Mg-26 values have a strong negative correlation with carbonate weathering, indicating the potential for riverine Mg isotopes to serve as a reliable indicator of carbonate weathering intensity.
Article
Multidisciplinary Sciences
Jiang Wu, Nan Xu, Yichu Wang, Wei Zhang, Alistair G. L. Borthwick, Jinren Ni
Summary: This study reveals the increasing severity of solute-induced river syndromes globally, characterized by significant increases in total dissolved solids, chloride, sodium, and sulfate fluxes to the oceans. These syndromes are most prevalent in temperate regions, where severe rock weathering and human interventions are concentrated. Urgent measures need to be taken to protect river health.
NATURE COMMUNICATIONS
(2021)
Article
Geochemistry & Geophysics
Katy E. Relph, Emily Stevenson, Alexandra Turchyn, Gilad Antler, Mike J. Bickle, J. Jotautas Baronas, Stephen E. Darby, Daniel R. Parsons, Edward T. Tipper
Summary: The research uses oxygen isotope ratios to partition sulfate sources, revealing diverse sulfuric acid weathering scenarios in the Mekong River basin with most CO2 released through the sulfuric acid weathering of carbonates.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Water Resources
W. Berry Lyons, Anne E. Carey, Christopher B. Gardner, Susan A. Welch, Devin F. Smith, Anna Szynkiewicz, Melisa A. Diaz, Peter Croot, Tiernan Henry, Raymond Flynn
Summary: This study in Ireland examined the influence of catchment geology, weathering regime, and climatic conditions on river water chemistry. It found that most catchments were dominated by carbonate weathering and that river water composition varied geographically along prevailing wind directions. Additionally, seasonal influences were observed in the headwaters of the River Shannon.
JOURNAL OF HYDROLOGY-REGIONAL STUDIES
(2021)
Article
Environmental Sciences
Maciej Liro, Anna Zielonka, Tim H. M. van Emmerik
Summary: This article presents a conceptual framework for studying the fragmentation process of macroplastics in rivers. By identifying the intrinsic properties of plastic items and the extrinsic controls of river characteristics and climate, it helps us understand the fate of macroplastics in rivers and the spread of microplastics in the environment.
ENVIRONMENT INTERNATIONAL
(2023)
Article
Geography, Physical
Long Tan, Jianguo Liu, Yun Huang, Rong Xiang, Shengfa Liu, Hui Zhang, Jingrui Li, Linghui Yu, Xuefa Shi
Summary: Based on clay mineralogy, siliciclastic grain sizes and geochemical records, this study reconstructed the evolutionary history of the Indian summer monsoon and associated weathering process in the Himalayan system since 37 ka. The results showed that sediments from the Ganges-Brahmaputra Rivers, Indo-Burman ranges/Irrawaddy River, and Godavari-Krishna Rivers mixed in the central Bay of Bengal. The study also revealed enhanced physical weathering and weakened chemical weathering during cold climate periods in the Himalayan system.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2023)
Article
Geochemistry & Geophysics
Preston C. Kemeny, Mark A. Torres, Michael P. Lamb, Samuel M. Webb, Nathan Dalleska, Trevor Cole, Yi Hou, Jared Marske, Jess F. Adkins, Woodward W. Fischer
Summary: Pyrite oxidation plays a critical role in the relationship between weathering and climate, especially through inversion models utilizing observations of river sulfate and its isotopic ratio. Measurements in western Iceland show that sulfate mainly derives from basalt weathering, and different geological formations influence the availability of unweathered bedrock.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Geochemistry & Geophysics
Shail Vijeta Ekka, Yu-Hsuan Liang, Kuo-Fang Huang, Jr-Chuang Huang, Der-Chuen Lee
Summary: This study measured the concentration and isotopic composition of molybdenum (Mo) in 25 major river catchments throughout Taiwan to better understand its geochemical behavior and the mechanism controlling Mo isotopic fractionation. The results showed seasonal variations in Mo concentration and isotopic composition in river water, but these variations had an insignificant effect on the Mo cycle in the oceans.
Article
Geochemistry & Geophysics
Kun Wang, Bernhard Peucker-Ehrenbrink, Heng Chen, Heather Lee, Elizabeth A. Hasenmueller
Summary: High-precision potassium isotope ratios have been proposed as a new tool for tracing continental weathering and reconstructing Earth's past climates. The K isotopic composition of global rivers is influenced by chemical weathering, contributing to the K isotopic composition of seawater.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Review
Chemistry, Multidisciplinary
Daniela Meroni, Ridha Djellabi, Muthupandian Ashokkumar, Claudia L. Bianchi, Daria C. Boffito
Summary: Ultrasonic processes have garnered attention for various applications, but scaling up for industrial use remains a challenge. This review provides an overview of the role of operating parameters and reactor configuration on sonochemical processes, comparing experimental and theoretical techniques, and reviewing classes of laboratory and large-scale sonoreactors.
Article
Geochemistry & Geophysics
Tong Zhao, Wenjing Liu, Yuanchuan Li, Zhifang Xu
Summary: This study focused on carbonate dominated rivers in southwest China, finding that lithology is the primary control of river water magnesium isotopic composition. Different tributaries may have solute sources from different weathering and mineral reactions.
Article
Environmental Sciences
Shail Vijeta Ekka, Yu-Hsuan Liang, Kuo-Fang Huang, Der-Chuen Lee
Summary: Two rivers in Taiwan, the polluted Danshuei River and non-polluted Liwu River, were studied to investigate the behavior of molybdenum (Mo) isotopes during weathering and riverine transport. The study found that the Mo isotope composition in the Danshuei River is lighter during the wet season and heavier in the dry season, while the Liwu River shows a heavier Mo isotope composition along its mainstream. The analysis also identified different sources of Mo in the Danshuei River, including seawater intrusion, rock-water interaction, and anthropogenic inputs.
Article
Geochemistry & Geophysics
Katrina Jewell, Kimberly D. Myers, Mehtaz Lipsi, Saddam Hossain, Saugata Datta, M. Bayani Cardenas, Jacqueline Aitkenhead-Peterson, Tom Varner, Kyungwon Kwak, Anne Raymond, Syed Humayun Akhter, Kazi M. Ahmed, Peter S. K. Knappett
Summary: This study aims to understand how the interaction of river-groundwater mixing influences the fate of trapped arsenic in the Natural Reactive Barrier (NRB). The observations suggest that bidirectional mixing from ocean tides may have created FeOOH-As deposits along the riverbanks of the Meghna River. The deposition of sedimentary organic carbon on floodplains and its chemical transformation of groundwater prior to discharge through the hyporheic zone (HZ) may play a role in the capture and retention of arsenic in the NRB. Monitoring wells installed at two sites showed the presence of dissolved iron, arsenic, and other solutes in the groundwater, which can co-precipitate with iron oxide minerals and trap arsenic in the long term.
APPLIED GEOCHEMISTRY
(2023)
Article
Water Resources
Luisa Villablanca, Ramon J. Batalla, Gemma Pique, Andres Iroume
Summary: This study comprehensively analyzes the hydrological effects of large dams in Chile and highlights the importance of considering the impact on river regimes in future dam construction plans.
JOURNAL OF HYDROLOGY-REGIONAL STUDIES
(2022)
Article
Geochemistry & Geophysics
Bolou Emile Bolou-Bi, Arnaud Legout, Hjalmar Laudon, Pascale Louvat, Benoit Pollier, Jerome Gaillardet, Kevin Bishop, Stephan J. Kohler
Summary: The study used stable Mg isotopes to identify potential sources of base cations in stream water in the Krycklan catchment in Sweden. Results show that magnesium in the streamwater mainly derives from groundwater, with a significant contribution during snowmelt periods. Open field rain dominates during spring floods and larger summer and autumn rainfall events. Soil solution input also contributes significantly to magnesium fluxes in streamwater.
Article
Geochemistry & Geophysics
Xu (Yvon) Zhang, Jerome Gaillardet, Laurie Barrier, Julien Bouchez
Summary: Marine authigenic clay formation is an important process in explaining the mass budgets of certain elements in seawater and can neutralize atmospheric acidity. However, direct investigations into reverse weathering have been limited due to sampling challenges. This study uses a combination of three isotope systems to provide evidence of authigenic clay formation in sediments from a 40-million-year-old delta complex in Spain, revealing potential effects of reverse weathering.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Geology
William Rapuc, Fabien Arnaud, Pierre Sabatier, Flavio S. Anselmetti, Andrea Piccin, Laura Peruzza, Antoine Bastien, Laurent Augustin, Edouard Regnier, Jerome Gaillardet, Ulrich Von Grafenstein, Kyle Straub
Summary: The sedimentary processes in the deep basin of large peri-Alpine lakes have not been extensively studied on long timescales. By analyzing the sediment section retrieved from Lake Iseo, it was found that event deposits accounted for 61.4% of the total sedimentation in the past 2000 years. The heterogeneity in textures, colors, and grain-size distribution can be explained by the numerous potential sources of sediment in this large lake system. Flood events were distinguished from slope destabilizations and delta destabilizations by combining proxies of sediment sources and transport processes. Major regional earthquake events were identified from the thickest mass wasting deposits. The study also revealed the influence of regional climatic fluctuations and human activities on sediment remobilization in the watershed, affecting the recording of extreme events in lacustrine archives.
Article
Environmental Sciences
Hannah Gies, Maarten Lupker, Silvan Wick, Negar Haghipour, Bjoern Buggle, Timothy Eglinton
Summary: This study investigates the impact of runoff-driven erosion on the contribution of different carbon source endmembers. By using an inverse model and carbon isotope signatures, the study reveals that soil-sourced organic carbon increases with runoff in alpine headwater streams.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2022)
Article
Geochemistry & Geophysics
Quentin Charbonnier, Julien Bouchez, Jerome Gaillardet, Damien Calmels, Mathieu Dellinger
Summary: This study reports the composition of barium isotopes in rivers with different contributions of black shale. The findings show that both dissolved and solid loads are enriched in heavy barium isotopes, indicating the influence of black shale weathering.
Article
Environmental Sciences
N. M. Fernandez, J. Bouchez, L. A. Derry, J. Chorover, J. Gaillardet, I Giesbrecht, D. Fries, J. L. Druhan
Summary: This study analyzes the stable silicon isotope ratios (δ30Si) of stream water samples from six catchments with different climates and lithologies to understand the variability of δ30Si in low-order catchments and the controls on Si chemical and isotopic signatures. The results show that δ30Si varies both within and across sites, with distinct signatures preserved even after normalization for bedrock composition. The combined model used in this study reveals that site-specific architecture regulates stream silicon export signatures.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2022)
Article
Geochemistry & Geophysics
Q. Charbonnier, J. Bouchez, J. Gaillardet, E. Gayer, S. Porder
Summary: The role of biological cycling on the chemistry of rivers is not well understood. This study examines the difference between the elemental supply to catchments through rock degradation and the corresponding elemental riverine export for several elements in 20 major river catchments worldwide. The study finds that the riverine export of potassium and barium is lower than their estimated release from rock degradation, while the fluxes match for lithium and sodium. The difference between these two groups of elements suggests the influence of biological uptake on river chemistry. However, the depletion of potassium in rivers cannot be explained by the growth of biota or the export of organic matter, pointing to the need for further research on the cycle of rock-derived nutrients in the Critical Zone.
GEOCHEMICAL PERSPECTIVES LETTERS
(2022)
Article
Geochemistry & Geophysics
Jon K. Golla, Julien Bouchez, Marie L. Kuessner, Daniella M. Rempe, Jennifer L. Druhan
Summary: This study investigates the long-term relationships between stream chemistry and discharge, and how they are regulated by watershed subsurface structure and biogeochemical functioning. The findings reveal that during intense storm events, stream lithium isotope signatures can record the routing of water and generation of solutes within the hillslope, providing insights into the variability of stream chemistry. These results have significant implications for understanding stream ecosystems and hydrogeochemical processes.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Geochemistry & Geophysics
Long-Fei Gou, Zhangdong Jin, Albert Galy, Yang Xu, Jun Xiao, Yibo Yang, Julien Bouchez, Philip A. E. Pogge von Strandmann, Chenyang Jin, Shouye Yang, Zhi-Qi Zhao
Summary: By systematically studying the seasonal riverine Mg-Sr isotopic pattern in the middle Yellow River based on samples collected weekly for the whole year of 2013, this research provides insights into the transport characteristics of stable metal isotopes in large rivers and their implications for present and past weathering. The results show that dissolved Mg in the river is mainly derived from silicate and carbonate sources, with limited evaporite contribution, and the isotopic composition is controlled by lithological mixing and prior calcite precipitation. Despite significant variations in temperature, hydrology, and precipitation seasonally, the mixing proportions of different Mg sources remain relatively constant, indicating the potential of dissolved Mg isotopes as a response to climatic forcing on a continental scale. The findings highlight the importance of sedimentary Mg isotope records in reflecting extreme conditions in geological time.
Article
Environmental Sciences
Esteban Avigliano, Marc Pouilly, Facundo Vargas, Jerry Penha, Natalia Silva, Julien Bouchez, Sebastian Sanchez, Alejandra V. Volpedo
Summary: This study aims to determine whether Manguruyu Zungaro jahu is a large-scale migratory species and describes its habitat use throughout ontogeny using otolith Sr isotope ratio. The results showed that the dispersal area of Z. jahu is restricted to the surroundings of the confluence of the Parana and Paraguay rivers. The fish exhibited chemical signatures compatible with those of the middle Parana, Paraguay-Pilcomayo-Bermejo, and the lower/upper Parana.
RIVER RESEARCH AND APPLICATIONS
(2023)
Article
Multidisciplinary Sciences
Jerome Lave, Cyrielle Guerin, Pierre G. Valla, Valery Guillou, Thomas Rigaudier, Lucilla Benedetti, Christian France-Lanord, Ananta Prasad Gajurel, Guillaume Morin, Jean Pascal Dumoulin, Christophe Moreau, Valier Galy
Summary: Despite numerous studies, the erosion mechanisms of the very high Himalayan peaks remained unknown. However, geological evidence suggests that mega-rockslides could be a mode of high-altitude erosion, preventing disproportionate growth of the peaks. These rockslides also have implications for landscape evolution and natural hazards.
Article
Ecology
Melissa Sophia Schwab, Hannah Gies, Chantal Valerie Freymond, Maarten Lupker, Negar Haghipour, Timothy Ian Eglinton
Summary: This study investigated the dependence of hydrology and seasonality on the discharge of sediment and organic carbon (OC) in a subalpine watershed in Switzerland. The majority of transferred OC was sourced from plant biomass and soil material, and organic matter alteration was found to occur rapidly over short distances. Storms were found to facilitate surface runoff and the transport of plant-derived debris and soil material.
Article
Geosciences, Multidisciplinary
Peter D. Clift, Christian Betzler, Steven C. Clemens, Beth Christensen, Gregor P. Eberli, Christian France-Lanord, Stephen Gallagher, Ann Holbourn, Wolfgang Kuhnt, Richard W. Murray, Yair Rosenthal, Ryuji Tada, Shiming Wan
Summary: The International Ocean Discovery Program conducted a series of expeditions to study the development of monsoon climate systems in Asia and Australia. They found that these regions have been becoming drier in the past few million years, especially in the last 4 million years, which could be attributed to global cooling. In addition, the formation and changes of monsoons are influenced by orbital forcing and continental erosion.
SCIENTIFIC DRILLING
(2022)
Article
Geosciences, Multidisciplinary
Yutian Ke, Damien Calmels, Julien Bouchez, Cecile Quantin
Summary: Riverine transport of POC plays a crucial role in the global carbon cycle. To enhance our understanding of the source, transport, and fate of fluvial POC, a comprehensive database of POC from different river basins is essential. This study introduces a new global database, MOREPOC 1.1, which includes POC data collected from 233 locations across 121 major river systems. The database aims to support the development of comprehensive models for the mobilization, alteration, and fate of terrestrial POC.
EARTH SYSTEM SCIENCE DATA
(2022)
Article
Geochemistry & Geophysics
Zhen-Min Ge, Xiao-Long Huang, Wei Xie, Tobias W. Hofig, Fan Yang, Yang Yu, S. Khogenkumar Singh
Summary: The mantle source composition of the nascent oceanic crust in the central part of the Gulf of California has been investigated using basaltic glass samples. These samples show trace element patterns similar to enriched mid-ocean ridge basalts, suggesting that the nascent oceanic crust in the Guaymas Basin might be generated through partial melting of a depleted mantle source metasomatized by subducted slab materials.
Article
Geochemistry & Geophysics
Jean-Michel Brazier, Katja E. Goetschl, Martin Dietzel, Vasileios Mavromatis
Summary: This study estimated the distribution coefficient of Zn2+ between calcite/aragonite and reactive fluids and found that the growth rate strongly influences D-Zn(2+) in both minerals. Additionally, a linear correlation was found between D-Zn(2+) and the saturation degree of the reactive fluid.
Article
Geochemistry & Geophysics
Ming Lei, Michele Lustrino, Jifeng Xu, Zhiqiang Kang, Zhengfu Guo, Jianlin Chen
Summary: This study presents a comprehensive geochronological, mineralogical, and geochemical analysis of olivine leucitites in the Maiga area of southern Tibet, suggesting that these rocks originate from a carbonated peridotite mantle source and highlighting the possibility of carbonates being recycled deep into the mantle during continental subduction.
Article
Geochemistry & Geophysics
Yuntao Ye, Xiaomei Wang, Huajian Wang, Haifeng Fan, Zhigang Chen, Qingjun Guo, Ziteng Wang, Chaodong Wu, Donald E. Canfield, Shuichang Zhang
Summary: Phosphorus is an essential element for life and its cycle in the ocean is closely connected with the carbon and oxygen cycles. The study of phosphate oxygen isotopes can provide insights into various reactions related to phosphorus. By analyzing carbonate fluorapatite samples from the Mesoproterozoic Era in North China, it was found that the oxygen isotope values were lower compared to modern samples, indicating a warmer climate during that time period and a potential reason for the scarcity of phosphorite.
Article
Geochemistry & Geophysics
Vincent Busigny, Oanez Lebeau, Didier Jezeduel, Carine Chaduteau, Sean Crowe, Magali Ader
Summary: This study conducted high-precision Mo isotope research on hydrothermal metal sulfides from a porphyry copper deposit in Southwest China and found that different stages of mineralization have distinct Mo isotope compositions, providing valuable insights into the behavior of Mo isotopes in magmatic-hydrothermal systems.
Article
Geochemistry & Geophysics
Min Ji, Xiao-Ying Gao, Yong-Fei Zheng, Bing Gong
Summary: The study examines the anatectic mechanisms in the Himalayan orogen, finding that pressure and temperature control the reaction, while water content mainly affects the solid-phase composition. Dehydration and hydration melting likely occur at different depths in the crust. This research provides important insights into the melting processes in collisional orogens.