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How do gridded meteorological datasets perform in a typical data-scarce cryospheric basin?

Advances in Climate Change Research 2024年第6期15卷 1027-1039页

作者： Ya-Ping CHANG Dong-Hui SHANGGUAN Yong-Jian DING Shi-Qiang ZHANG Qiu-Dong ZHAO Jie WANG Key Laboratory of Cryospheric Science and Frozen Soil Engineering Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China College of Earth and Environmental Sciences Lanzhou UniversityLanzhou 730000China Shanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity Northwest UniversityXi'an 710027China College of Urban and Environmental Sciences Northwest UniversityXi'an 710027China Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China

Gridded meteorological datasets have been widely used in meteorological and hydrological studies,especially in data-scarce ***,assessments of these datasets in cryospheric basins,which are highly sensitive to global warming,remain ***,three representative gridded meteorological datasets,i.e.,the China meteorological forcing dataset(CMFD),CN05.1,and the meteorological forcing dataset for the third-pole region(TPMFD),were systematically evaluated in the Nachitai Basin based on comparisons with limited gauge observations,pairwise intercomparisons,and hydrological *** gridded precipitation and temperature datasets were in good agreement with gauge observations on an intra-annual scale,while substantial differences existed among them in terms of precipitation and temperature on an annual ***,pairwise correlation analyses indicated that the temporal consistency between the datasets was higher than their spatial ***,all three datasets achieved satisfactory and reasonable results in simulating glacier area and streamflow variations when used as inputs for the hydrological-hydrodynamic model,exhibiting the robustness of the model in this data-scarce *** study provides a more profound understanding of the significance of gridded datasets in data-scarce areas situated on the Tibetan Plateau.

关键词： Data-scarce cryospheric basin Gridded meteorological datasets Hydrometeorological evaluation Hydrological−hydrodynamic model

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Experimental and theoretical studies of spherical hydroxylamine hydrochloride intercalated molybdenum disulfide for the removal of U(VI), Eu(III), and Cr(VI)

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Chemosphere 2024年 367卷 143670页

作者： Wang, Jian Li, Yan MOE Key Laboratory of Resources and Environmental System Optimization College of Environmental Science and Engineering North China Electric Power University Beijing102206 China

The current environmental problem is the coexistence of multiple pollutants rather than a single pollutant. In this study, U(VI), Eu(III), and Cr(VI) are selected as representatives of the actinides, lanthanide elements, and heavy metal elements for removal study. The hydroxylamine hydrochloride intercalated molybdenum disulfide (HAH/MoS2) was prepared to remove these contaminants. The insertion of hydroxylamine hydrochloride increased layer spacing, which was conducive to the pollutant molecules entering the molybdenum disulfide layer. HAH/MoS2 revealed a spherical shape with a rough surface and relatively high anti-interference. The maximum adsorption capacities of HAH/MoS2 for U(VI), Eu(III), and Cr(VI) reached 104.9 mg/g, 72.9 mg/g, and 81.4 mg/g, respectively. The adsorption mechanism of U(VI) was interlayer adsorption at pH 6.2. Similarly, the removal of Eu(III) was interlayer adsorption at pH 3(s) at pH > 7.7. The removal of Cr(VI) depended on surface complexation at pH 4.0. These ions were more likely to be adsorbed between layers instead of at the surface. Compared to U(VI) and Cr(VI), Eu(III) was more easily adsorbed at the interlamination of HAH/MoS2. From the point of view of charge transfer, U(VI) and Eu(III) tended to give away electrons, and Cr(VI) tended to gain electrons in the removal process. This work can offer a new perspective for the design and application of two-dimensional materials for multiple pollutants removal. © 2024

关键词： Charge transfer

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Failure evaluation and control factor analysis of slope block instability along traffic corridor in Southeastern Tibet

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Journal of Mountain Science 2024年第6期21卷 1830-1848页

作者： LIU Changqing BAO Han LAN Hengxing YAN Changgen LI Changbo LIU Shijie School of Highway Chang'an UniversityXi'an 710064China State Key Laboratory of Resources and Environmental Information System Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China College of Geological Engineering and Geomatics Chang'an UniversityXi'an 710054China

The instability of slope blocks occurred frequently along traffic corridor in Southeastern Tibet(TCST),which was primarily controlled by the rock mass structures.A rapid method evaluating the control effects of rock mass structures was proposed through field statistics of the slopes and rock mass structures along TCST,which combined the stereographic projection method,modified M-JCS model,and limit equilibrium *** instabilities of slope blocks along TCST were then evaluated rapidly,and the different control factors of instability were *** showed that the probabilities of toppling(5.31%),planar(16.15%),and wedge(35.37%)failure of slope blocks along TCST increased *** instability modes were respectively controlled by the anti-dip joint,the joint parallel to slope surface with a dip angle smaller than the slope angle(singlejoint),and two groups of joints inclined out of the slope(double-joints).Regarding the control effects on slope block instability,the stabilization ability of doublejoints(72.7%),anti-dip joint(67.4%),and single-joint(57.6%)decreased sequentially,resulting in different probabilities of slope block ***,nearby regional faults significantly influenced the joints,leading to spatial heterogeneity and segmental clustering in the stabilization ability provided by joints to the slope ***,the stability of slope blocks gradually weakened as they approached the fault *** paper can provide guidance and assistance for investigating the development characteristics of rock mass structures and the stability of slope blocks.

关键词： Slope engineering Block instability Rapid evaluation method Rock mass structure Control factor

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Spatio-temporal characteristics of human activities using location big data in Qilian Mountain National Park

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International Journal of Digital Earth 2023年第1期16卷 3794-3809页

作者： Minglu Che Yanyun Nian Siwen Chen Hao Zhang Tao Pei Key Laboratory of Western China’s Environmental Systems(Ministry of Education) College of Earth and Environmental SciencesLanzhou UniversityLanzhouPeople’s Republic of China State Key Laboratory of Resources and Environmental Information System Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijingPeople’s Republic of China University of Chinese Academy of Sciences BeijingPeople’s Republic of China

Human activities significantly impact the *** the patterns and distribution of these activities is crucial for ecological *** location-based technology advancement,big data such as location and trajectory data can be used to analyze human activities on finer temporal and spatial scales than traditional remote sensing *** this study,Qilian Mountain National Park(QMNP)was chosen as the research area,and Tencent location data were used to construct time series *** series clustering and decomposition were performed,and the spatio-temporal distribution characteristics of human activities in the study area were analyzed in conjunction with GPS trajectory data and land use *** study found two distinct human activity patterns,Pattern A and Pattern B,in *** to Pattern B,Pattern A had a higher volume of location data and clear nighttime *** incorporating land use and trajectory data,we conclude that Pattern A and Pattern B represent the activity patterns of the resident and tourist populations,***,the study identified seasonal variations in human activities,with human activity in summer being approximately two hours longer than in *** also conducted an analysis of human activities in different counties within the study area.

关键词： Location data spatial and temporal analysis time series clustering tourism studies social geography

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A Dual-Source Deep Learning Model for Mapping Wet Anabranches in Braided Rivers on the Tibetan Plateau

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IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing 2025年 18卷 12773-12785页

作者： Liu, Xiaolu Ma, Xiaoyi Qin, Shuai Liu, Tang Zhou, Chenghu Chinese Academy of Sciences State Key Laboratory of Resources and Environmental Information System Institute of Geographic Sciences and Natural Resources Research Beijing100101 China University of Chinese Academy of Sciences College of Resources and Environment Beijing101408 China Hebei South Canal River Affairs Center Hebei061001 China

The Tibetan Plateau is home to dozens of large braided rivers, a phenomenon that is extremely rare in the global distribution of alluvial rivers. Dynamically monitoring these rivers is crucial for understanding the unique sedimentary processes and hydrodynamic patterns of the plateau. However, the complex network of water channels and sandbars, coupled with frequent cloud cover, intricate terrain, and numerous branches in the plateau region, poses significant challenges to traditional monitoring and extraction methods. To address these challenges, this study proposes a novel dual-feature encoder deep learning model, DIResU-Net, which integrates Sentinel-1 and Sentinel-2 data to achieve high-precision and long-term extraction of braided rivers. The model employs dual encoders to extract features from optical and radar data, combined with a unified decoder and an attention mechanism for efficient feature fusion. Additionally, a multi-composite loss function was designed to enhance the model's performance. Experimental results demonstrate that the proposed DIResU-Net achieves a high F1-score of 0.87 and IoU of 0.79 under cloud-free conditions, significantly outperforming traditional single-source models. In cloud-covered scenarios, the model maintains robust performance (IoU > 0.73) by leveraging the complementary advantages of Sentinel-1 and Sentinel-2 data. The model also exhibits strong temporal generalization in mapping river morphology from 2019 to 2024, highlighting its value for long-term monitoring and environmental management. Further analysis of morphological parameters—such as river width, channel density, and braiding index—reveals clear seasonal and interannual fluctuations across typical river sections, reflecting the dynamic nature of braided river systems on the plateau. This study provides a scalable framework for high-resolution mapping and long-term monitoring of braided rivers, with implications for hydrological analysis and basin-scale management o

关键词： Information management

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Heavy metal sorption on struvite recovered from livestock wastewaters and release properties of granular forms

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environmental Science and Pollution Research 2024年第29期31卷 42133-42143页

作者： Liu, Xiaoning Wang, Yazhou Zeng, Xiang Wang, Siyang State Key Laboratory of Water Resources Engineering and Management Wuhan University Wuhan430072 China Hubei Key Laboratory of Water System Science for Sponge City Construction Wuhan University Wuhan430072 China School of Resource and Environmental Sciences Wuhan University Wuhan430072 China

Phosphorus recovery from wastewater is receiving more attention due to its non-renewable property. As copper (Cu) and zinc (Zn) usually occur in livestock wastewater, this study focused on metal sorption in struvite from swine wastewater and the release properties of granular struvite in solution with varying pH conditions (2, 4, 7). The results demonstrated pH values presented a slightly decreasing trend with increasing Cu/Zn ratio, and Zn exhibited higher sorption performance on struvite crystals than that of Cu. Under the high content of metals in the wastewater, Cu/Zn ratios in the wastewater contributed to varying metal binding forms and mechanisms, resulting in the difference in the leaching properties of nutrients and metal. For the granular struvite manufactured with the adhesion of alginate, the P release percentage achieved 30.3–40.5% after 96 h in the wastewater of pH 2, whereas they were only 5.63–8.92% and 1.05–1.50% in the wastewater of pH 4 and 7, respectively. Acid wastewater contributed to the release of two metals, and the release amount of Zn was higher than that of Cu, which is associated with their sorption capacity in crystals. During the latter soil leaching test of adding granular struvite, the NH4+-N and PO43−-P concentration in the effluent ranged from 0.34 to 1.26 and 0.62 to 2.56 mg/L after 96 h, respectively. However, the Cu and Zn could not be measured due to lower than the detection limit under varying treatments. Struvite might be accompanied by quicker metal leaching and slower nutrient leaching when surface sorption dominates in wastewater with lower metal concentrations. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.

关键词： Nutrients

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Incorporating Exercise Efficiency to Evaluate the Accessibility and Capacity of Medical resources in Tibet, China

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Chinese Geographical Science 2023年第1期33卷 175-188页

作者： WANG Li YANG Linsheng WEI Binggan LI Hairong CAI Hongyan HUANG Jixia YUAN Xing Key Laboratory of Land Surface Pattern and Simulation Institute of Geographical Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China State Key Laboratory of Resources and Environmental Information System Institute of Geographical Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China Key Laboratory for Silviculture and Conservation of Ministry of Education Beijing Forestry UniversityBeijing 100083China

Accessibility and capacity of medical resources are key for the health care and emergency response, while the efficiency of the medical resources is very much limited by hypoxia in Tibet, *** introducing exercise efficiency, this study explores the accessibility of township residence to county-ship medical resources in Tibet using weighted mean travel time(WMT), and evaluates the medical capacity *** results show that: 1) the average travel time of township residence to county-level hospital is around2 h by motor vehicle in *** than half of the population can not reach the county-ship hospital within 1 h, 33.24% of the population can not reach within 2 h, and 3.75% of the population can not reach within 6 h.2) When considering the catchment of the medical resources and the population size, the WMT of the county-ship medical resources ranges from 0.25 h to 10.92 h.3) After adjusted by travel time and exercise efficiency, the county-ship medical capacity became more unequal, with 38 out of 74 counties could not meet the national guideline of 1.8 medical beds per 1000.4) In total, there are 17 counties with good WMT and sufficient medical resources,while 13 counties having very high WMT and low capacity of medical resources in *** the end, suggestions on medical resources relocation and to improve the capacity are *** study provides a method to incorporate exercise efficiency to access the accessibility and evaluate medical capacity that can be applied in high altitude ranges.

关键词： exercise efficiency medical resources medical capacity Tibet

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Identifying reservoirs in northwestern Iran using high-resolution satellite images and deep learning

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地球空间信息科学学报（英文版） 2024年第3期27卷 922-933页

作者： Kaidan Shi Yanan Su Jinhao Xu Yijie Sui Zhuoyu He Zhongyi Hu Xin Li Harry Vereecken Min Feng College of Earth and Environmental Sciences Lanzhou UniversityLanzhouChina National Tibetan Plateau Data Center State Key Laboratory of Tibetan Plateau Earth SystemEnvironment and ResourcesInstitute of Tibetan Plateau ResearchChinese Academy of SciencesBeijingChina National Tibetan Plateau Data Center State Key Laboratory of Tibetan Plateau Earth SystemEnvironment and ResourcesInstitute of Tibetan Plateau ResearchChinese Academy of SciencesBeijingChina National Tibetan Plateau Data Center State Key Laboratory of Tibetan Plateau Earth SystemEnvironment and ResourcesInstitute of Tibetan Plateau ResearchChinese Academy of SciencesBeijingChina University of Chinese Academy of Sciences BeijingChina National Tibetan Plateau Data Center State Key Laboratory of Tibetan Plateau Earth SystemEnvironment and ResourcesInstitute of Tibetan Plateau ResearchChinese Academy of SciencesBeijingChina School of Water Resources and Environment China University of GeosciencesBeijingChina Institute of Bio-and Geosciences JülichGermany National Tibetan Plateau Data Center State Key Laboratory of Tibetan Plateau Earth SystemEnvironment and ResourcesInstitute of Tibetan Plateau ResearchChinese Academy of SciencesBeijingChina University of Chinese Academy of Sciences BeijingChina Academy of Plateau Science and Sustainability Qinghai Normal UniversityXiningChina

Reservoirs play a critical role in terrestrial hydrological systems,but the contribution of small and medium-sized ones is rarely considered and *** in developing countries,there is a rapid increase of such reservoirs due to their quick *** identify-ing these reservoirs is important for understanding social and economic development,but distinguishing them from other natural water bodies poses a significant ***,we propose a method to identify reservoirs using high-resolution satellite images and deep learning *** trained models with various parameters and network structures,and You Only Look Once version 7(YOLOv7)outperformed other algorithms and was selected to build the final *** method was applied to a region in northwestern Iran,characterized by an abundance of reservoirs of various *** results indicated that our method was highly accurate(mAP:0.79,Recall:0.76,Precision:0.82).The YOLOv7 model was able to automatically identify 650 reservoirs in the entire study region,indicating that the proposed method can accurately detect reservoirs and has the potential for broader-scale surveys,even global applications.

关键词： Reservoir deep learning object detection Iran

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The current and future of terrestrial carbon balance over the Tibetan Plateau

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Science China Earth Sciences 2023年第7期66卷 1493-1503页

作者： Tao WANG Xiaoyi WANG Dan LIU Guanting LV Shuai REN Jinzhi DING Baozhang CHEN Jiansheng QU Yafeng WANG Shilong PIAO Fahu CHEN State Key Laboratory of Tibetan Plateau Earth System Environment and Resources(TPESER)Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100101China State Key Laboratory of Resource and Environmental Information System Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China Chengdu Documentation and Information Center Chinese Academy of SciencesChengdu 610041China Sino-French Institute for Earth System Science College of Urban and Environmental SciencesPeking UniversityBeijing 100101China

The contemporary carbon balance over the Tibetan Plateau is highly uncertain with a ten-fold difference between various *** a warming world,the potential exists for a large carbon release from its permafrost which could compromise China’s 2060 carbon-neutral ***,we used a satellite-and inventory-based approach,ecosystem models,and atmospheric inversions to estimate that the carbon sink was 33.12–37.84 TgC yr^(–1)during 2000–*** carbon sink induced by climate change and increasing CO_(2) levels largely overcompensated for a livestock grazing-induced carbon source of 0.38TgC yr^(-1).By 2060,the carbon sink is projected to increase by 38.3–74.5% under moderate to high emissions scenarios,with the enhanced vegetation carbon uptake outweighing the warming-induced permafrost carbon *** restoration of degraded grassland could sequestrate an additional 9.06 TgC yr^(-1),leading to a total carbon sink of 57.78–70.52 TgC yr^(-1).We conclude that the Tibetan Plateau’s ecosystems absorbed two-and-a-half times the amount of its cumulative fossil CO_(2) emissions during 2000–2015 and that their carbon sinks will almost double in strength in the future,helping to achieve China’s pledge to become carbon neutral by 2060.

关键词： Tibetan Plateau Carbon balance Satellite-and inventory-based approach Terrestrial ecosystem models Atmospheric inversions Grassland restoration

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The northern boundary of the Asian summer monsoon and division of westerlies and monsoon regimes over the Tibetan Plateau in present-day

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Science China Earth Sciences 2023年第4期66卷 882-893页

作者： Lingxin HUANG Jie CHEN Kun YANG Yujie YANG Wei HUANG Xu ZHANG Fahu CHEN Key Laboratory of Western China’s Environmental Systems(Ministry of Education) College of Earth and Environmental SciencesLanzhou UniversityLanzhou 730000China Group of Alpine Paleoecology and Human Adaptation(ALPHA) State Key Laboratory of Tibetan Plateau Earth SystemEnvironment and Resources(TPESER)Institute of Tibetan Plateau Research(ITPCAS)Chinese Academy of Sciences(CAS)Beijing 100101China College of Atmospheric Sciences Lanzhou UniversityLanzhou 730000China Department of Earth System Science Ministry of Education Key Laboratory for Earth System ModelingInstitute for Global Change StudiesTsinghua UniversityBeijing 100084China National Tibetan Plateau Data Center State Key Laboratory of Tibetan Plateau Earth SystemEnvironment and Resources(TPESER)Institute of Tibetan Plateau Research(ITPCAS)Chinese Academy of Sciences(CAS)Beijing 100101China

Precipitation patterns and their variations over the Tibetan Plateau(TP) are mainly dominated by the Asian summer monsoon, westerlies, and their interactions. The exact extent of the Asian summer monsoon’s influence, however, remains undetermined. Referencing the climatological northern boundary index of the East Asian summer monsoon, we demonstrate that the 300 mm precipitation isoline from May to September can be utilized as an indicator of the northern boundary of the Asian summer monsoon over the TP, allowing for an analysis of the spatial distribution characteristics of the climatological and interannual northern boundary. Our results indicate that the climatological northern boundary of the Asian summer monsoon over the TP lies along the eastern Qilian Mountains-Tanggula Mountains-Qiangtang Plateau-Gangdise Mountains-Western Himalayas during 2001–2020. This position corresponds well with the position of the convergence of westerly(westerlies) and southerly wind(monsoon) in the lower troposphere, representing the interface between dry and wet regions in the rainy season over the TP. There is a significant positive correlation between changes in the zonal/meridional water vapor budget and variations in precipitation to the north/south of the climatological northern boundary, respectively. Additionally, a close relationship exists between the interannual fluctuation range of the northern boundary and the distribution of vegetation across the TP. Compared to the northern boundary of the summer monsoon defined by meteorological criteria, which is established based on 5-day(pentad)mean precipitation(exceeding 4 mm day^(-1)), our climatological northern boundary offers a more objective portrayal of the region that experiences persistent influence from the summer monsoon. These indicate that climatological northern boundary has a clear significance for natural geographical distribution such as the westerlies-monsoon circulation, ecology, and climate. Based on the inte

关键词： Tibetan Plateau Asian summer monsoon Climatological northern boundary index Westerlies domain Monsoon domain

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