Article
Geosciences, Multidisciplinary
Lisa R. Welp, Elizabeth J. Olson, Adriana Larrea Valdivia, Juan Reyes Larico, Efrain Palma Arhuire, Lino Morales Paredes, Jonathan T. DeGraw, Greg M. Michalski
Summary: This study analyzed the stable isotopes of precipitation in the city of Arequipa, Peru, and found that the isotopic composition of rainfall is influenced by atmospheric circulation patterns, providing new insights into moisture source influence in the Western Cordillera.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Engineering, Civil
Sofia E. Kjellman, Elizabeth K. Thomas, Anders Schomacker
Summary: High-latitude lakes are sensitive to climate change and can store information about large-scale circulation changes and catchment-integrated processes. The isotopic composition of lakes is influenced by inflow seasonality and evaporation, with each lake varying in sensitivity to these controls over time.
JOURNAL OF HYDROLOGY
(2022)
Article
Engineering, Civil
Fenyan Ma, Jiaqi Chen, Jiansheng Chen, Tao Wang
Summary: The absence of precipitation-isotope stations in the wide flatland of the Mongolian Plateau hampers the analysis of precipitation processes. To address this issue, a precipitation-isotope station was established in Erenhot in 2015. The study analyzed the temporal variations of stable isotopes in precipitation and their influencing factors, and provided basic precipitation-isotope information for researching the distribution of precipitation-isotope signatures in Asia and the water cycle in the Mongolian Plateau.
JOURNAL OF HYDROLOGY
(2023)
Article
Engineering, Civil
Stefano Natali, Ilaria Baneschi, Marco Doveri, Roberto Giannecchini, Enricomaria Selmo, Giovanni Zanchetta
Summary: By analyzing oxygen and hydrogen stable isotope data collected from multiple sites, the study explores the factors influencing the isotopic characteristics of precipitation in the Tuscany region, finding that isotopic variability in rainfall is closely related to meteorological and geographical variables, with moisture sources from the Atlantic and Mediterranean contributing differently in various seasons.
JOURNAL OF HYDROLOGY
(2021)
Article
Meteorology & Atmospheric Sciences
Cong Xie, Liangju Zhao, Christopher J. Eastoe, Xiaohong Liu, Ninglian Wang, Zihan Zhang, Xiying Dong, Hang Liu
Summary: Seasonal and interannual variations in stable isotopes of precipitation in Xi'an, Northwest China, exhibit a consistent annual cycle, with maximum values occurring in the pre-monsoon season and minimum values in the late monsoon to post-monsoon seasons. Maps of water sources and wind fields, combined with isotope data and monsoon intensity indices, suggest that moisture sources during the monsoon come from the Bay of Bengal or recycled from land surfaces, while during the pre-monsoon they come from westerly circulation passing north of the Tibetan Plateau, and during the post-monsoon, they come from recycled monsoon moisture influenced by the South Asian Summer Monsoon.
ATMOSPHERIC RESEARCH
(2022)
Article
Meteorology & Atmospheric Sciences
Stefano Natali, Marco Doveri, Linda Franceschi, Roberto Giannecchini, Marco Luppichini, Matia Menichini, Giovanni Zanchetta
Summary: The Mediterranean basin is heavily affected by climate change, especially small islands which face increased water scarcity and stress due to drought events. Stable isotopes in precipitation are used to study hydrological processes, and in the Mediterranean region, temperature, precipitation amount, and moisture origin contribute to isotopic variability.
ATMOSPHERIC RESEARCH
(2023)
Article
Engineering, Civil
Shuang-Ye Wu, Zelalem Bedaso
Summary: This study identifies the controlling factors for variations of precipitation isotopes in Ethiopia and quantifies the contributions of different moisture sources. Recycled continental moisture is found to be the dominant source of precipitation isotopes, with significant variations between wet and dry seasons. Strong convective activities play a crucial role in regulating isotopic values, contributing to the seasonal patterns observed. These findings offer important insights for interpreting paleoclimate proxies and understanding hydroclimate processes in the region.
JOURNAL OF HYDROLOGY
(2022)
Article
Engineering, Civil
Huawu Wu, Hongxiang Fan, Ruiyu Lei, Chijun Sun, Shengjie Wang, Haohao Wu, Congsheng Fu
Summary: This study collected daily precipitation isotopes in the Yangtze River Basin to investigate the controls on precipitation isotopic variability in the East Asian monsoon region. The results showed that convective behaviors and moisture sources play important roles in determining precipitation stable isotopes. The study highlighted the significant contribution of water vapor from the Indian Ocean and the Bay of Bengal to the variability of precipitation isotopes.
JOURNAL OF HYDROLOGY
(2023)
Article
Meteorology & Atmospheric Sciences
A. A. Cluett, E. K. Thomas, S. M. Evans, P. W. Keys
Summary: Increased precipitation in the Arctic in the coming century is driven by moisture transport and local evaporation, leading to various expressions in isotopic patterns. Historical observations in Greenland show differences in seasonal patterns between the southwest and northwest coast, potentially due to dynamic moisture source variations. The sensitivity of precipitation isotopes to moisture source variability suggests that coastal Arctic regions may provide valuable paleoclimate records.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2021)
Article
Environmental Sciences
Yanlong Kong, Ke Wang, Sheng Pan, Yaqian Ren, Weizun Zhang
Summary: Stable isotopes (O-18/O-16 and H-2/H-1) can be used to understand water circulation by serving as fingerprints of water molecules. Using the HYSPLIT model, this study identifies different moisture sources and characterizes the isotopic composition of meteoric precipitation in Northwest China. The results reveal that the westerlies have a dominant influence throughout the year, while other moisture sources only affect specific regions during certain seasons.
Article
Water Resources
Shiyong Tao, Xiang Zhang, Guoyan Pan, Jing Xu, Zhenyu Zeng
Summary: The study reveals that the seasonal isotope variation of precipitation in the Poyang Lake Wetland is influenced by climate, mainly due to changes in contributions from different moisture sources. The seasonal isotope variation is not affected by local meteorological factors, but rather by variations in monsoon activities and continental sources.
JOURNAL OF HYDROLOGY-REGIONAL STUDIES
(2021)
Article
Environmental Sciences
Gahong Yang, Yanqiong Xiao, Shengjie Wang, Yuqing Qian, Hongyang Li, Mingjun Zhang
Summary: The altitude effect of stable isotopes in meteoric water is the theoretical basis of isotope paleoaltimetry. However, recent observations have shown the existence of the inverse altitude effect (IAE) in meteoric water. In this study, global frequency of IAE in water vapor isotopes was examined using remote sensing data, and its possible influences on isotopes in precipitation and climate proxies were analyzed.
Article
Engineering, Civil
Mojtaba Heydarizad, Masoud Minaei, Kimpei Ichiyanagi, Rogert Sori
Summary: The use of stable isotope techniques in studying water resources in the Middle East reveals the influence of local climate factors on precipitation and surface water resources, as well as the significant variation in contributions from different air masses in the recharge of rivers across the region.
JOURNAL OF HYDROLOGY
(2021)
Article
Geochemistry & Geophysics
Joshua Munro, Chris Harris
Summary: The 2060 +/- 2 Ma Phalaborwa Complex is a pipe-like intrusion formed from multiple magma pulses. It is composed of a main pipe made up of various rock types, surrounded by smaller plugs. The delta O-18 values for most minerals are consistent with magmatic equilibrium, while alkali feldspar and phlogopite show more variability. The high-delta O-18 values suggest a mantle source for the magmas.
JOURNAL OF PETROLOGY
(2023)
Article
Meteorology & Atmospheric Sciences
Wenmin Man, Tianjun Zhou, Jie Jiang, Meng Zuo, Jun Hu
Summary: Understanding the climate controls of precipitation delta O-18 in the Tibetan Plateau is crucial for paleoclimate reconstructions. This study uses a model to quantify the different moisture contributions to precipitation delta O-18 and identifies the major moisture sources for different regions. The model shows some deficiencies in simulating the characteristics of precipitation delta O-18 and the local climatic controls across the Tibetan Plateau.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2022)
Article
Environmental Sciences
Yan Kong, Kun Han, Yuan Zhuang, Baoyou Shi
Summary: In this study, three-dimensional aerogels were utilized as templates for the in-situ growth of MOFs and derived carbon aerogels, which showed excellent adsorption capacity for antibiotic removal from aqueous solution. The research provides a new strategy for water purification.
Article
Geosciences, Multidisciplinary
Yonghui Huang, Yuanzhi Cheng, Lu Ren, Fei Tian, Sheng Pan, Ke Wang, Jianwei Wang, Yuexia Dong, Yanlong Kong
Summary: This paper proposes a method for evaluating the deep geothermal potential in oil fields by integrating a 3D geological model with a hydrothermal numerical model. The method calculates the geothermal resource in each small grid element using a volumetric approach and investigates the influence of oil and gas saturations on the overall heat resources through a parameter study. By integrating the 3D geological modeling and HT numerical model, the accuracy of geothermal resource assessment is improved, and the distribution map of available geothermal resources is identified.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Energy & Fuels
Yuanzhi Cheng, Zhonghe Pang, Yanlong Kong, Xiaobin Chen, Guangjie Wang
Summary: This study qualitatively estimated the subsurface structure and inverted the electrical resistivity model of the Kangding geothermal system based on magnetotelluric data. It identified significant geothermal anomalies and a magmatic heat source at a depth of 20 km.
Article
Engineering, Civil
Yuanzhi Cheng, Xiangyun Hu, Yanlong Kong, Yanhui Dong, Junfeng Guo, Liheng Wang, Jiyang Wang
Summary: Acid in-situ uranium leach mining is an effective technique for uranium extraction, but it leads to high concentrations of acidic contaminants in aquifers. This study used CSAMT to investigate a uranium mining area in northwest China and successfully identified the scale and position of acid contaminant plumes. The study also showed that low-permeability sandstone restricts the migration of contaminants.
JOURNAL OF HYDROLOGY
(2022)
Article
Geochemistry & Geophysics
Yifan Bao, Zhonghe Pang, Tianming Huang, Yiman Li, Jiao Tian, Ji Luo, Tingqing Qian
Summary: By analyzing multiple isotopes, we investigated the origin and evolution of sulfate concentration in the Tangquan Karst geothermal system in Nanjing, China. The sulfate was found to mainly come from the dissolution of gypsum and other evaporite minerals occurring in the carbonate reservoir.
APPLIED GEOCHEMISTRY
(2022)
Article
Energy & Fuels
Xianbiao Bu, Kunqing Jiang, Xianlong Wang, Xiao Liu, Xianfeng Tan, Yanlong Kong, Lingbao Wang
Summary: Calcium carbonate precipitation is a common problem in geothermal industry. This study investigates the whole process of scaling and antiscaling, including analysis, simulation, equipment design, experiments, and evaluation. The results show that injecting inhibitors below the flashing point effectively solves the problem of calcium carbonate precipitation.
Article
Environmental Sciences
Jie Li, Zhonghe Pang, Lijun Tian, Hongyi Zhao, Guoying Bai
Summary: This study investigates the short-term isotopic variations and controlling factors in a monsoon climate region using stable isotopes of precipitation samples from seven hydrometeorological stations in Beijing. The study finds that the increase in δO-18 values from northwest to south is controlled by the monsoon from the south and continental moisture from the northwest. The study also reveals the significant impact of the monsoon on δO-18 values and deuterium excess during May to September, and identifies the moisture source and residual vapor fraction as the most important factors in controlling δO-18 patterns in precipitation in a monsoon region.
Article
Thermodynamics
Yuanyuan Zhang, Cantao Ye, Yanlong Kong, Yulie Gong, Dongdong Zhang, Yecheng Yao
Summary: In this study, the heat transfer performance of the medium-deep downhole coaxial heat exchanger in a ground source heat pump system is analyzed based on practical project data. The results show that the outlet water temperature and heating capacity significantly decrease when the heat exchanger is operated consecutively for multiple years. The heat capacity attenuates with rates of 17.32%, 16.17%, and 8.82% from the second to fourth heating period. Three solar supplemental heat schemes are proposed to alleviate the heat attenuation. The continuous heat supplement in non-heating period is found to be the optimal scheme.
Article
Energy & Fuels
Yonghui Huang, Yanlong Kong, Yuanzhi Cheng, Chuanqing Zhu, Jixiong Zhang, Jiyang Wang
Summary: This paper introduces a parallel horizontal ground heat exchangers (pHGHE) system to utilize the geothermal resource in deep coal mines and quantitatively evaluates its long-term sustainability. The results show that the maximum sustainable specific heat extraction rate is 40 W/m for a 50-year exploitation period, which can provide heating to over 170,000 m2 of residential building area. The study also analyzes the key parameters and the effects of groundwater flow on the system sustainability.
Article
Meteorology & Atmospheric Sciences
Xiaoyi Shi, Camille Risi, Laurent Li, Xuejie Wang, Tao Pu, Guotao Zhang, Yuan Zhang, Zhiyuan Wang, Yanlong Kong
Summary: This study evaluates the simulation of the seasonal cycle of water isotopic composition over Tibetan Plateau regions from six isotope-enabled general circulation models. The results show that there are differences among the models and the simulated isotopic seasonality is generally underestimated. The simulations demonstrate that in the southern Tibetan Plateau, the precipitation isotopic composition is more depleted in summer than in winter, while in the northern plateau it is the opposite. The simulations are primarily influenced by the simulated upstream precipitation and the simulated strength of the zonal wind.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2022)
Article
Geochemistry & Geophysics
Yuanzhi Cheng, Cheng Wang, Wenwei Da, Yanlong Kong, Xiangyun Hu
Summary: Southern China has abundant low-medium temperature geothermal resources, but the lack of research on their properties hinders the utilization of geothermal energy. This study aims to investigate the mechanisms of the Changshou geothermal field, a representative structurally controlled convective geothermal system, by analyzing geophysical and hydrochemical data. The study identifies the geological structure, thermal reservoir, and fluid pathways of the geothermal system, providing insights into its potential as a source of energy for residential heating in winter.
Article
Geosciences, Multidisciplinary
Yanlong Kong, Tao Pu, Ke Wang, Xiaoyi Shi, Yaqian Ren, Weizun Zhang, Zhonghe Pang, Matthias Cuntz
Summary: The altitude effect of isotopes in precipitation is less significant on the leeward side of a mountain compared to the windward side, making it challenging to use isotopes for estimating groundwater recharge elevation or reconstructing paleoelevations in leeward sites. This study collected precipitation samples at three stations with different elevations on the leeward side of the Meili Snow Mountains on the southeastern Tibetan Plateau. The analysis of isotopic gradients showed that most of the gradients exceeded the global ranges, and the ambiguous altitude effect was attributed to local processes of sub-cloud evaporation and mixing with recycled moisture, while the major patterns of stable isotope variation were influenced by regional atmospheric circulation processes.
HYDROGEOLOGY JOURNAL
(2023)
Article
Environmental Sciences
Yanlong Kong, Ke Wang, Sheng Pan, Yaqian Ren, Weizun Zhang
Summary: Stable isotopes (O-18/O-16 and H-2/H-1) can be used to understand water circulation by serving as fingerprints of water molecules. Using the HYSPLIT model, this study identifies different moisture sources and characterizes the isotopic composition of meteoric precipitation in Northwest China. The results reveal that the westerlies have a dominant influence throughout the year, while other moisture sources only affect specific regions during certain seasons.
Article
Energy & Fuels
Yaqian Ren, Yanlong Kong, Yonghui Huang, Shu Bie, Zhonghe Pang, Jichao He, Wei Yi, Bin He, Jiyang Wang
Summary: In this study, a new performance indicator was used to assess the effectiveness of operational strategies in mitigating thermal anomalies in large-scale ground source heat pump (GSHP) systems. By adjusting the cooling/heating starting sequence, setting time-dependent thermal loads, and reallocating thermal loads according to the position of the borehole heat exchangers (BHEs), the thermal anomalies caused by the intense thermal interactions between the BHEs can be alleviated. The new performance indicator can also be used to evaluate the effectiveness of the operational strategies and determine the spacing of adjacent BHE arrays.
Article
Geochemistry & Geophysics
Yuanzhi Cheng, Xiangyun Hu, Bo Han, Yiman Li, Yanlong Kong, Ji Tang
Summary: The electrical resistivity model of the lithosphere in the Wuyi-Yunkai Orogen region reveals a complex structure with high-resistivity sedimentary cover in the upper crust and zones of enhanced electrical conductivity extending from the lower crust to the upper mantle. These features are interpreted as magmatic rocks, tectonic melanges, and saline fluids from subducting slabs or metamorphism-induced dehydration. The lithospheric thinning of South China is mainly controlled by mantle upwelling due to the retreat of the subducting Paleo-Pacific slab.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2022)