Article
Engineering, Civil
Yincai Xie, Fen Huang, Hui Yang, Shi Yu
Summary: The chemical composition of groundwater is primarily controlled by carbonate weathering, but sulfuric and nitric acids also play a role in the process. The contribution of sulfuric and nitric acids to (Ca2+ + Mg2+) and HCO3- in groundwater varies greatly, ranging from 0.6% to 58.0% and 0.3% to 40.9%, respectively.
JOURNAL OF HYDROLOGY
(2021)
Article
Engineering, Environmental
Lize Meng, Weiyue Hao, Chu Zhao, Shuaidong Li, Jingya Xue, Jianhong Li, Luyao Tu, Tao Huang, Hao Yang, Zhaoyuan Yu, Linwang Yuan, Changchun Huang
Summary: This study investigates the composition and sources of char and soot in combustion-driven particulate black carbon (PBC) along the Yangtze River. The results show that high refractory PBC in the river is mainly derived from fossil fuel combustion, especially soot. It is estimated that the Yangtze River annually transports 0.15-0.23 Tg of soot and 0.15-0.25 Tg of char to the ocean, which can act as a long-term sink and prolong the residence time of terrigenous carbon.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Environmental Sciences
Yincai Xie, Yupei Hao, Jun Li, Yongli Guo, Qiong Xiao, Fen Huang
Summary: This study quantitatively evaluated the influence of anthropogenic H2SO4 on different lithological carbonate weathering and the related carbon sink budget in southwest China. The results showed that H2SO4 precipitation increased the weathering rate by 14-19%, but decreased the flux of karst carbon sink by 7-11%.
Article
Environmental Sciences
Andreja Sironic, Mavro Lucic, Igor Felja, Darko Tibljas
Summary: Between 1979 and 2003, a 35 cm thick layer of laminated tufa formed around a wooden pillar located at the beginning of the Korana River, Croatia. The tufa structure provided valuable information about temperature changes, evaporation rate, and anoxia events. The enrichment pattern of Cu and Pb in the tufa indicated their anthropogenic origin and the sensitivity of the tufa to environmental changes.
Article
Multidisciplinary Sciences
Xing Wei, Shuqun Cai, Weikang Zhan
Summary: The development and human activities in the Pearl River Estuary (PRE) in recent decades have led to a decrease in tidal flat and water areas, advancing coastline, and declining water volume. Land reclamation is the main reason, while activities such as channel dredging, sand mining, and dam construction have also impacted the estuary's morphology.
SCIENTIFIC REPORTS
(2021)
Article
Environmental Sciences
Sibo Zeng, Georg Kaufmann, Zaihua Liu
Summary: This paper evaluates the global applicability of different environmental drivers on carbonate dissolution intensity and carbon sink flux. The study uses ecological models and satellite data to estimate global averages and compares the accuracy of different models. The results highlight the intertwined nature of natural and anthropogenic factors in shaping global carbonate dissolution intensity and carbon sink patterns.
GLOBAL BIOGEOCHEMICAL CYCLES
(2022)
Article
Biodiversity Conservation
Yuan Li, Lingchao Fang, Wang Yuanzhu, Wujuan Mi, Li Ji, Zhang Guixiang, Pingheng Yang, Zhongbing Chen, Yonghong Bi
Summary: This study explored the relationship between anthropogenic activities and river trophic status in the tributaries of the Three Gorges Reservoir in China. The results showed significant spatio-temporal variations in trophic status, with the highest levels observed in summer. Quantitative anthropogenic activities were found to explain the eutrophic frequency and eutrophication risk in the tributaries. The findings contribute to a better understanding of the interrelationship between humans and the environment, and provide practical strategies for river environmental restoration.
ECOLOGICAL INDICATORS
(2022)
Article
Water Resources
Xiaoyi Shi, Yanlong Kong, Tao Pu, Ke Wang, Peiyi Peng, Yanwei Ma
Summary: Chemical weathering processes are becoming increasingly important in carbon cycling research. This study investigates the spatial-temporal variations of major ions in Mingyong River in order to understand the mechanisms of mineral weathering processes and their influence on the carbon cycle. The results show that the composition of the river waters is dominated by Ca2+, Mg2+, HCO3-, and SO42-. It is also found that sulfuric acid and carbonic acid play significant roles in chemical weathering. The findings suggest that catchments involving sulfuric acid have the potential to alter the carbon cycle and should be considered in global carbon cycle models.
HYDROLOGICAL PROCESSES
(2023)
Article
Environmental Sciences
Sen Xu, Siliang Li, Jing Su, Fujun Yue, Jun Zhong, Shuai Chen
Summary: This study evaluated the roles of strong acids in chemical weathering and the carbon cycle using multiple isotopes, hydrochemistry, and historical monitoring data. The results showed that the contribution of strong acid weathering to the total weathering budget was lower than assumed, indicating that protons might be largely neutralized by HCO3- derived from rock weathering driven by both carbonic and strong acids.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Geochemistry & Geophysics
Satyabrata Das, Gyana Ranjan Tripathy, Santosh K. Rai, Mohd Danish, Divya Thakur, Som Dutt, Shushanta Sarangi
Summary: The study revealed that both sulfuric and carbonic acid play crucial roles in the chemical weathering processes in the Teesta River in the Himalayan river basins. The contributions of sulfate and carbonate-mediated weathering to the major cations are comparable in this basin.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2021)
Article
Geochemistry & Geophysics
Tianliang Zheng, He Lin, Yang Deng, Yanhua Xie, Jianfei Yuan, Xingguo Du, Xiangjun Pei
Summary: This study investigated the enrichment and mobility of arsenic (As) and boron (B) in river sediments from the Tibetan Plateau. The weathering of Cs-bearing silicate minerals was found to be a potential source of As, while carbonate weathering contributed to B enrichment. Incubation experiments showed that both As and B can be mobilized under varying environmental conditions, with increases in HCO3- concentration and temperature enhancing their mobilization. The study provides new insights into the hydrogeochemical control on the enrichment and mobility of As and B in river sediments and has implications for similar riverine systems.
APPLIED GEOCHEMISTRY
(2023)
Article
Environmental Sciences
Xin Yi, Sijia Yin, Ling Huang, Hongli Li, Yangjun Wang, Qian Wang, Andy Chan, Dramane Traore, Maggie Chel Gee Ooi, Yonghang Chen, David T. Allen, Li Li
Summary: Chlorine radical plays a crucial role in the formation of ozone and secondary aerosols in the troposphere. This study provides a comprehensive emission inventory for major atomic chlorine precursors in the Yangtze River Delta (YRD) region of China in 2017, with substantial emissions of HCl mainly from biomass burning and coal combustion, and fine particulate Cl- mainly emitted from industrial processing.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Biodiversity Conservation
Jun Li, Hao Xie, Jianhong Li, Guoli Yang, Yincai Xie, Jiawei Wang, Changsong Zhou, Shengzhang Zou
Summary: This study quantitatively assessed the influences of anthropogenic acids on carbonate weathering and CO2 sink in karst wetland regions. The results showed that anthropogenic nitric acid and sulfuric acid significantly affected carbonate weathering and led to a decrease in water levels and degradation of wetland ecosystems. Furthermore, the involvement of anthropogenic acids in natural chemical weathering significantly reduced the CO2 sink, potentially impacting the karst carbon cycle and global climate change.
ECOLOGICAL INDICATORS
(2023)
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
Environmental Sciences
Xi Chen, Yanhua Wang, Ling Jiang, Xiaoli Huang, Danni Huang, Wen Dai, Zucong Cai, Dong Wang
Summary: This study evaluated the impact of various anthropogenic activities on water quality in an urban river and predicted its evolution trends using comprehensive assessment methods and a random forest model. The results showed that the urban river had a medium pollution level and light eutrophication. Water quality was sensitive to anthropogenic activities, with different districts exhibiting varying levels of pollution and trophic status. Constructed land and domestic sewage were identified as crucial factors aggravating water quality pollution. Improving domestic sewage treatment standards was found to be the most effective measure to improve water quality.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Geography, Physical
William Rapuc, Julien Bouchez, Pierre Sabatier, Kim Genuite, Jerome Poulenard, Jerome Gaillardet, Fabien Arnaud
Summary: Soil erosion is a major environmental threat that affects the Critical Zone and ecosystem services. A study in the Italian Alps used lake sediments to reconstruct the long-term evolution of erosion, showing that human activities have been the dominant driving force of physical erosion in the mountainous environment.
QUATERNARY SCIENCE REVIEWS
(2021)
Article
Environmental Sciences
Pierre Lefebvre, Pierre Sabatier, Arnaud Mangeret, Alkiviadis Gourgiotis, Pierre Le Pape, Anne-Lise Develle, Pascale Louvat, Olivier Diez, Jean-Louis Reyss, Jerome Gaillardet, Charlotte Cazala, Guillaume Morin
Summary: The study investigated the U accumulation processes in Lake Negre sediments over the past 9200 years and found that U accumulation was influenced by climatic variations and sediment inputs, with U fluxes controlled by U scavenging in watershed soils.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
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
Ecology
Qi-Hui Zheng, Wei Chen, Si-Liang Li, Le Yu, Xiao Zhang, Lan-Fa Liu, Ramesh P. Singh, Cong-Qiang Liu
Summary: The study aims to evaluate the accuracy of different land use and land cover (LULC) products in the coastal area of Tianjin city. Results show that GLC_FCS30-2020 has the highest classification accuracy, but all products have lower verification accuracies than official announcements. High accuracy is observed for agricultural land, impervious surface, and water bodies, while forest, grassland, and shrubs have lower accuracy. Land cover changes in Tianjin from 2010 to 2020 indicate a decrease in agricultural land and an increase in construction land, driven by rapid population growth, economic development, and policy guidance.
ECOLOGICAL INFORMATICS
(2021)
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
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
Geosciences, Multidisciplinary
Sylvain Pasquet, Jean Marcais, Jorden L. Hayes, Peter B. Sak, Lin Ma, Jerome Gaillardet
Summary: Weathering and erosion processes are essential for CZ evolution and availability of natural resources. This study proposes a novel workflow using near-surface geophysics to characterize the architecture of the deep CZ at a catchment scale on a volcanic tropical island, revealing complex weathering patterns.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Environmental Sciences
Yuan Zou, Wei Chen, Siliang Li, Tiejun Wang, Le Yu, Min Xu, Ramesh P. Singh, Cong-Qiang Liu
Summary: This study conducted a detailed analysis of spatio-temporal vegetation patterns in the Beijing-Tianjin-Hebei region. The results show a slow upward trend in vegetation indices and leaf area indices, with variations observed among different vegetation types and regions. The study also reveals significant correlations between air temperature, precipitation, and net primary production, as well as negative impacts of urbanization on vegetation.
Article
Environmental Sciences
W. A. Charitha Udeshani, Nadeesha H. Koralegedara, S. K. Gunatilake, Si-Liang Li, Xiangyu Zhu, Rohana Chandrajith
Summary: Chronic kidney disease with uncertain etiology (CKDu) is a growing health problem in Sri Lanka, particularly in dry-zone farming communities that use groundwater for drinking. The quality of groundwater in an area with both high and low-prevalence clusters of CKDu was investigated. The study found that groundwater in the region exceeded recommended limits for various parameters, including EC/TDS, alkalinity, hardness, and Mg2+ content. High fluoride content was also observed in most samples. The water quality index (WQI) values indicated that a significant portion of groundwater samples in both high and low CKDu prevalence regions had poor quality. The spatial distribution of WQI and fluoride concentration overlapped with the CKDu hotspots, suggesting a direct influence of groundwater quality on the prevalence of CKDu.
Article
Environmental Studies
Yangyang Wu, Lei Gu, Siliang Li, Chunzi Guo, Xiaodong Yang, Yue Xu, Fujun Yue, Haijun Peng, Yinchuan Chen, Jinli Yang, Zhenghua Shi, Guangjie Luo
Summary: This study explores the impact of the construction and operation of the GH highway on vegetation and NDVI, and finds that the construction has significantly affected the surrounding vegetation ecology and the correlation between temperature and vegetation cover is stronger than that between precipitation and vegetation.
Article
Water Resources
Sandra Garcia, Pascale Louvat, Jerome Gaillardet, Syprose Nyachoti, Lin Ma
Summary: Using multiple isotope tracers, this study identified and quantified various anthropogenic and natural sources of salinity in the Rio Grande river, showing high spatial and temporal variability in the chemical and isotopic compositions. The combination of different isotope tracers helps to quantify the contributions of different salinity sources in different seasons along the Rio Grande, highlighting the importance of a multi-tracer approach in investigating complex river systems with diverse solute inputs.
FRONTIERS IN WATER
(2021)
Article
Geography, Physical
Pierre Nevers, Julien Bouchez, Jerome Gaillardet, Christophe Thomazo, Delphine Charpentier, Laeticia Faure, Catherine Bertrand
Summary: This study utilized data from a highly instrumented active landslide observatory in the French Alps to investigate the contribution of different lithologies and chemical weathering mechanisms in the Sechilienne slope. Findings show that the instability creates conditions for the production of sulfuric acid, with a significant role of pyrite oxidation and remote gypsum dissolution affecting the chemistry of the waters. The study underscores the complex coupling between physical and chemical erosion and their impact on the carbon cycle and global climate, highlighting the need to distinguish between sulfite oxidation and gypsum dissolution as sources of sulfate ions in rivers, especially in mountain ranges.
EARTH SURFACE DYNAMICS
(2021)
Article
Geochemistry & Geophysics
Lingyu Zhang, Kristoffer Szilas
Summary: This study presents new petrological and geochemical data for the Narssaq Ultramafic Body (NUB) in the Itsaq Gneiss Complex of SW Greenland. The results indicate that the ultramafic rocks of NUB are not mantle residues, but instead represent crustal cumulates derived from high-Mg magmas.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
Rong Xu, Sarah Lambart, Oliver Nebel, Ming Li, Zhongjie Bai, Junbo Zhang, Ganglan Zhang, Jianfeng Gao, Hong Zhong, Yongsheng Liu
Summary: This study investigated the iron isotope compositions of Cenozoic basalts in Southeast China, finding significant variations related to different types of basalts and their respective sources.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
C. J. Ebinger, Miriam C. Reiss, Ian Bastow, Mary M. Karanja
Summary: The East African rift system is formed above mantle upwellings and the formation of rifts is related to lithospheric thinning and magmatic activity. The amount of splitting varies spatially and the fast axes are predominantly parallel to the orientation of the rifts. Thick lithospheric modules have less splitting and different orientations, which may indicate mantle plume flow. Splitting rotates and increases in strength as it enters the rift zones, suggesting that the anisotropy is mainly present at shallow depths.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Correction
Geochemistry & Geophysics
Ekaterina Rojas-Kolomiets, Owen Jensen, Michael Bizimis, Gene Yogodzinski, Lukas Ackerman
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
Robert W. Nicklas, Igor S. Puchtel, Ethan F. Baxter
Summary: Oxygen fugacity is a fundamental parameter for understanding redox processes in igneous systems. This study compares the Fe-XANES oxybarometry method with the V-in-olivine method for evaluating fO(2) in MORB lavas. The results show that the V-in-olivine method is not applicable to samples with low MgO content, and that the majority of Archean komatiite sources have lower fO(2) than modern MORB.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
Chunfei Chen, Stephen F. Foley, Sebastian Tappe, Huange Ren, Lanping Feng, Yongsheng Liu
Summary: The volatile components CO2 and H2O play a major role in mantle melting and heterogeneity. In this study, Ca isotopes were used to trace the lithological heterogeneity in alkaline magmatic rocks. The results revealed the presence of K-richterite and carbonate components as the source of alkaline magmas with low delta 44/40Ca values. These findings highlight the importance of Ca isotopes as a robust tracer of lithological variation caused by volatiles in the Earth's upper mantle.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
Timothee Jautzy, Gilles Rixhon, Regis Braucher, Romain Delunel, Pierre G. Valla, Laurent Schmitt, Aster Team
Summary: Although the current approach to estimate catchment-wide denudation rates using only 10Be concentrations has made significant progress in geomorphology, this study argues for the inclusion of 26Al measurements and testing of steady-state assumptions in slow eroding, formerly glaciated landscapes. The study conducted measurements of both 10Be and 26Al in stream sediments from the Vosges Massif in France and found that elevation, slope, channel steepness, and precipitation were the primary factors controlling denudation rates. The study also revealed a significant relationship between the extent of past glaciation and the cosmogenic (un-)steadiness in the stream sediments.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
Erik van der Wiel, Douwe J. J. van Hinsbergen, Cedric Thieulot, Wim Spakman
Summary: Numerical models of Earth's mantle dynamics can predict the vigour and mixing of mantle flow, and the average slab sinking rates are an unexplored parameter that can provide intrinsic information on these characteristics. Through numerical experiments, it has been found that slab sinking rates are strongly correlated with mantle convection and mixing, and may explain geochemical observations from hotspot volcanoes.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)