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Large-scale land-sea interactions extend ozone pollution duration in coastal cities along northern China

Environmental science and Ecotechnology 2024年第2期18卷 150-160页

作者： Yanhua Zheng Fei Jiang Shuzhuang Feng Yang Shen Huan Liu Hai Guo Xiaopu Lyu Mengwei Jia Chenxi Lou Jiangsu Provincial Key Laboratory of Geographic Information science and Technology International Institute for Earth System ScienceNanjing UniversityNanjing210023China Jiangsu Center for Collaborative Innovation in Geographical Information resource Development and Application Nanjing210023China Frontiers science Center for Critical Earth Material Cycling Nanjing UniversityNanjing210023China School of Environment Tsinghua UniversityBeijing100084China Air Quality Studies Department of Civil and Environmental EngineeringHong Kong Polytechnic UniversityHong KongChina

land-sea atmosphere interaction(LSAI)is one of the important processes affecting ozone(O_(3))pollution in coastal *** effects of small-scale LSAIs like sea-land breezes have been widely ***,it is not fully clear how and to what extent the large-scale LSAIs affect O_(3) *** we explored an O_(3) episode to illuminate the role of large-scale LSAIs in O_(3) pollution over the BohaieYellow Seas and adjacent areas through observations and model *** results show that the northern Bohai Sea's coastal region,influenced by the Mongolian High,initially experienced a typical unimodal diurnal O_(3) variation for three days,when O_(3) precursors from BeijingeTianjineHebei,Shandong,and Northeast China were transported to the BohaieYellow *** reactions generated O_(3) within marine air masses,causing higher O_(3) levels over the seas than coastal *** the Mongolian High shifted eastward and expanded,southerly winds on its western edge transported O_(3)-rich marine air masses toward the coast,prolonging pollution for an additional three days and weakening diurnal ***,emissions from the Korean Peninsula and marine shipping significantly affected O_(3) levels in the northern Bohai Sea(10.7%and 13.7%,respectively).Notably,Shandong's emissions played a substantial role in both phases(27.5%and 26.1%,respectively).These findings underscore the substantial impact of large-scale LSAIs driven by the Mongolian High on O_(3) formation and pollution duration in coastal *** insight helps understand and manage O_(3) pollution in northern Bohai Sea cities and broadly applies to temperate coastal cities worldwide.

关键词： Mongolian high Source apportionment WRF-CMAQ Sea-crossing transport

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Comparison of isotope-based linear and Bayesian mixing models in determining moisture recycling ratio

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Journal of Arid land 2024年第6期16卷 739-751页

作者： XIAO Yanqiong WANG Liwei WANG Shengjie Kei YOSHIMURA SHI Yudong LI Xiaofei Athanassios A ARGIRIOU ZHANG Mingjun Key Laboratory of resource Environment and Sustainable Development of Oasis of Gansu Province College of Geography and Environmental ScienceNorthwest Normal UniversityLanzhou 730070China Northwest Institute of Eco-Environment and resources Chinese Academy of SciencesLanzhou 730000China Atmosphere and Ocean Research Institute University of TokyoKashiwa 277-8568Japan School of Environmental science and Engineering Shaanxi University of Science and TechnologyXi'an 710021China Laboratory of Atmospheric Physics Department of PhysicsUniversity of PatrasPatras GR-26500Greece

Stable water isotopes are natural tracers quantifying the contribution of moisture recycling to local precipitation,i.e.,the moisture recycling ratio,but various isotope-based models usually lead to different results,which affects the accuracy of local moisture *** this study,a total of 18 stations from four typical areas in China were selected to compare the performance of isotope-based linear and Bayesian mixing models and to determine local moisture recycling *** the three vapor sources including advection,transpiration,and surface evaporation,the advection vapor usually played a dominant role,and the contribution of surface evaporation was less than that of *** the abnormal values were ignored,the arithmetic averages of differences between isotope-based linear and the Bayesian mixing models were 0.9%for transpiration,0.2%for surface evaporation,and–1.1%for advection,respectively,and the medians were 0.5%,0.2%,and–0.8%,*** importance of transpiration was slightly less for most cases when the Bayesian mixing model was applied,and the contribution of advection was relatively *** Bayesian mixing model was found to perform better in determining an efficient solution since linear model sometimes resulted in negative contribution *** test with two isotope scenarios indicated that the Bayesian model had a relatively low sensitivity to the changes in isotope input,and it was important to accurately estimate the isotopes in precipitation ***,the Bayesian mixing model should be recommended instead of a linear *** findings are useful for understanding the performance of isotope-based linear and Bayesian mixing models under various climate backgrounds.

关键词： moisture recycling stable water isotope linear mixing model Bayesian mixing model China

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Research progress in assessment and strategies for sustainable food system within planetary boundaries

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science China Earth sciences 2024年第2期67卷 375-386页

作者： Minglei WANG Wenjiao SHI Key Laboratory of land Surface Pattern and Simulation Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing100101China College of resources and Environment University of Chinese Academy of SciencesBeijing100049China

Meeting the increasing food demand in a manner that ensures both resources and environmental sustainability poses a global *** conceptual framework of planetary boundaries(PBs)has emerged as a crucial reference in the study of sustainable food system,with specific focuses on key dimensions such as land use change,freshwater use,nitrogen(N)and phosphorus(P)cycles,and greenhouse gas(GHG)*** this study,we summarized the threshold applications of PBs in sustainable food system research at both the global and national(China)*** on these thresholds,we evaluated the sustainability conditions of the food system,considering resources such as cropland,freshwater,N and P applications,as well as environmental impacts including N and P losses,and GHG *** addition,we explored the impacts of single or combined management strategies on sustainable food *** strategies included dietary changes,improvements in technologies and management,reductions in food loss and waste,and optimization in agricultural production ***,we outlined future research directions in sustainable food system,including enhancing research on the interaction mechanisms among PBs elements within food systems,conducting downscaling studies of PBs elements at national and regional levels,and ensuring the rationality of policy-making for sustainable food systems in *** study can provide a theoretical foundation and strategies guidance for sustainable food system and agricultural land use management in the future both globally and in China.

关键词： Food system resource use Environmental impacts Sustainable strategy Planetary boundaries

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Combining conservation tillage with nitrogen fertilization promotes maize straw decomposition by regulating soil microbial community and enzyme activities

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Pedosphere 2024年第4期34卷 783-796页

作者： Houping ZHANG Xueqin TANG Quanming HOU Yuanpeng ZHU Zhangheng REN Huanxin XIE Yuncheng LIAO Weiyan WANG Xiaoxia WEN College of Agronomy Northwest A&F UniversityYangling 712100China Key Laboratory of Crop Physi-ecology and Tillage science in Northwestern Loess Plateau Ministry of AgricultureNorthwest A&F UniversityYangling 712100China Key Laboratory of Water Cycle and Related land Surface Processes Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China

Straw return can effectively improve farmland soil microenvironment and ***,excessive straw in the topsoil adversely affects seed germination and crop *** present,the characteristics and key driving factors of straw decomposition in dry farmlands are *** on the interactions between tillage practices including zero tillage(ZT),chisel tillage(CT),and plow tillage(PT)and nitrogen(N)fertilization,i.e.,low N(N1,180 kg ha^(-1)),normal N(N2,240 kg ha^(-1)),and high N(N3,300 kg ha^(-1)),quantitative polymerase chain reaction technology and an enzymatic detection kit were used to investigate the effects of key straw C-degrading enzyme activities and microbial abundance in soil on maize straw decomposition during the growth period of winter wheat in the winter wheat/summer maize double cropping system in a dry farmland of the Loess Plateau,*** 2018 and 2020,ZT and CT significantly increased winter wheat yield(by 10.94%and 12.79%,respectively)and straw decomposition velocity(by 20%and 26.67%,respectively),compared with *** to N1 and N3,N2 significantly increased wheat yield(by 4.65%and 5.31%,respectively)and straw decomposition velocity(by 26.33%and 13.21%,respectively).The partial least squares pathway modelling showed significant positive direct effects of soil moisture,NO3-,NH4+,total N,bacteria,and cellulase,laccase,and xylanase activities on straw decomposition,while soil pH,fungi,and Actinomycetes had significant negative direct ***,conservation tillage(ZT and CT)combined with N2 was beneficial for straw decomposition in the drylands of the Loess Plateau and improved straw resource utilization and basic soil *** results of the study clarified the key drivers of straw decomposition in dry farmlands and provided new ideas for developing updated soil management practices and adaptive N application strategies to promote the resource utilization of straw and achieve the goals of carbon peaking and carbon ne

关键词： hydrolytic enzyme microbial biomass oxidative enzyme straw decomposition velocity tillage practice

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Examining the pathway and mechanism of comprehensive land consolidation through the lens of rural neo-endogenous development

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Journal of Geographical sciences 2024年第9期34卷 1739-1760页

作者： LUO Xiuli JIN Xiaobin LIU Xiaojie HONG Buting ZHOU Yinkang School of Geography and Ocean science Nanjing UniversityNanjing 210023China Key Laboratory of Coastal Zone Exploitation and Protection Ministry of Natural ResourcesNanjing 210023China Key Laboratory of Carbon Neutrality and Territory Optimization Ministry of Natural ResourcesNanjing 210023China Jiangsu Province land Consolidation and Ecological Restoration Research Center Nanjing 210023China

land consolidation(LC) stands as a globally recognized strategy for rural development. In China, it has evolved towards comprehensive land consolidation(CLC) to support the rural revitalization initiative. However, there are ongoing challenges in understanding CLC's specific pathway and mechanism, particularly its role in stimulating rural endogenous development. This study aims to investigate the localization process of international experiences, examine the pathway of CLC, and scrutinize its mechanism in rural development from a novel perspective of neo-endogenous development. Field research and semi-structured interviews were conducted in Nanzhanglou village, renowned for its early adoption of CLC practices inspired by German experiences since 1988. Overall, key findings underscore the advantages of CLC in spatial restructuring, industrial development, and human capital enhancement in rural areas. Additionally, international experiences emerge as crucial exogenous forces, primarily by knowledge embedding, which catalyzes rural neo-endogenous development via the “resource-engagement-identity-endogenous” mechanism. Collectively, by introducing a neo-endogenous theoretical framework, this study offers valuable insights into the CLC implementation in China and beyond, and emphasizes the positive impact of knowledge embedding as an exogenous force in promoting rural neo-endogenous development to address existing research gaps. Recommendations for sustainable rural development involve enhancing rural planning practicality, governance capacity, and local leadership, while prioritizing agricultural modernization and increasing investments in education and vocational training to ensure that villagers benefit from industrial development.

关键词： comprehensive land consolidation international experience localization rural neo-endogenous development mechanism

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Influence of Transportation Accessibility on Urban-rural Income Disparity and Its Spatial Heterogeneity

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Chinese Geographical science 2024年第3期34卷 453-467页

作者： HUANG Xiaoyan KANG Chenchen YIN Chun TANG Junqing Northwest land and resources Research Center Global Regional and Urban Research InstituteShaanxi Normal UniversityXi’an 710119China School of resource and Environmental sciences Wuhan UniversityWuhan 430079China International Institute of Spatial Lifecourse Health(ISLE) Wuhan UniversityWuhan 430079China School of Urban Planning and Design Shenzhen Graduate SchoolPeking UniversityShenzhen 518055China Key Laboratory of Earth Surface System and Human-Earth Relations of Ministry of Natural resources of China Shenzhen Graduate SchoolPeking UniversityShenzhen 518055China

Transportation accessibility has been treated as an important means of reducing the urban-rural income ***,only a few studies have examined the effects of different types of transportation accessibility on urban-rural income disparity and their spatial *** on data from 285 prefecture-level(and above)Chinese cities in 2000,2005,2010,2015,and 2020,this study uses spatial econometric models to examine how highway accessibility and railway accessibility influence the urban-rural income disparity and to identify their spatial *** result reveals that highway accessibility and railway accessibility have‘coreperiphery’ring-like circle *** urban-rural income disparity exhibits strong spatial clustering *** highway accessibility and railway accessibility are negatively associated with urban-rural income disparity,and the former having a greater effect ***,there is a substitution effect between highway accessibility and railway accessibility in the whole ***,these associations differ in geographic *** the central region,highway accessibility is more important in reducing the urban-rural income disparity,but its effect is weakened with the increase of railway *** the western region,railway accessibility has a larger effect on narrowing the urban-rural income disparity,and this effect is strengthened by the increase of highway *** conclude that improving transportation accessibility is conducive to reducing the urban-rural income disparity but its effect is spatial *** and railways should be developed in a coordinated manner to promote an integrated transport network system.

关键词： transport accessibility income gap regional divergence spatial heterogeneity urban and rural areas China

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Medium distribution, source characteristics and ecological risk of bisphenol compounds in agricultural environment

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Emerging Contaminants 2024年第2期10卷 65-75页

作者： Yihao Qin Jianchao Liu Lei Han Jinghua Ren Chenyang Jing Guanghua Lu Xinming Yang Key Laboratory of Integrated Regulation and resource Development of Shallow Lakes of Ministry of Education Hohai UniversityNanjing210098China College of Environment Hohai UniversityNanjing210098China Jinan Environmental Research Institute(Jinan Yellow River Basin Ecological Protection Promotion Center) JinanChina Technology Innovation Center for Ecological Monitoring&Restoration Project on land(arable) Ministry of Natural Resources Geological Survey of Jiangsu ProvinceNanjing210018China

Bisphenol compounds(BPs)are commonly used in industry and ***,BPs pollution has already raised global concerns due to their ecological *** study investigated nine types of BPs in agricultural soil and irrigation rivers,and evaluated the occurrence,source apportionment,and ecological risks for BPs in soils of agricultural environment by using principal component analysis-multivariate linear regression(PCA-MLR)and risk quotients(RQ).The average concentration of BPs in soil,irrigation water and sediments were 29.19 ng/g,30.21 ng/L and 610.09 ng/g dw,*** was the most highly detected contaminant in all *** soil,the primary BPA substitutes were bisphenol S(BPS)and bisphenol F(BPF),contributing about 50%to the pollution in ***-MLR analysis indicated that the release of solid waste was the primary cause of BPs pollution in the agricultural soils,following by waste water *** evaluation of RQ revealed that BPs presented a low to medium risk to algae,daphnia,and fish in irrigation rivers,while more than 90% of soil sampling sites faced medium or high risk,with BPA and BPS as the main contributors to the *** research findings offer evidence to support the assessment of contaminants concentration,source pathways,and risk management strategies pertaining to BPs in the agricultural *** ongoing BPA substitute occurrence,addressing risks to agricultural soil ecosystems remains crucial.

关键词： Bisphenol compounds Soil Irrigation rivers Ecological risks

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Conditioning treatments mitigate the levels of fecal pollution indicators in soil during land-application of sewage sludge

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science China Technological sciences 2024年第10期67卷 3091-3102页

作者： WANG YuHang LI Hua FANG WenHao WANG Ru WANG XinXin ZHENG GuanYu ZHOU LiXiang Department of Environmental Engineering College of Resources and Environmental SciencesNanjing Agricultural University College of Materials and Chemical Engineering Pingxiang University Jiangsu Collaborative Innovation Center for Solid Organic Waste resource Utilization

Sewage sludge is a major source of fecal pathogens in the environment, and its application to land can result in a significant release of these pathogens into the soil. While conditioning treatments are crucial for improving the dewatering process of sludge, their impact on the presence and behavior of fecal pathogens in soil remains unclear. This study aims to assess four extraction methods for recovering fecal pollution indicators from soil amended with unconditioned and conditioned sludge. The indicators include Escherichia coli(EC), human-specific HF183 Bacteroides(HF183), human adenovirus(HAdV), human BK polyomavirus(BKPyV), human JC polyomavirus(JCPyV), and cross-assembly phage(crAssphage). This study also examines how soil moisture content affects the decay of these fecal pollution indicators in soil amended with raw sludge and investigates the influence of conditioning treatments with cationic polyacrylamide(PAM), Fenton's reagents, Fe[Ⅲ]/CaO on their persistence in soil. The results indicated that the direct extraction method was the most effective and unbiased for recovering fecal pollution indicators from sludge-amended soil compared with the three elution-concentration methods. All fecal pollution indicators, except HAdV, remained stable under dry soil conditions, while high soil moisture content(48.39%-53.14%) slowed the decay rates of these indicators. During the application of sludge to soil, effective control of fecal pollution indicators was observed, with JCPyVand HAdV becoming undetectable within a short period. The log reduction values of HF183, BKPyV, and crAssphage ranged from 0.1 to 2.8 logs after 30 d of cultivation. The application of conditioned sludge, especially Fenton's reagent-conditioned sludge, resulted in a reduction in human fecal contamination in the receiving soil. Therefore, implementing appropriate conditioning methods, such as using Fenton's reagent, can effectively mitigate the health risks associated with fecal pathogens.

关键词： fecal pollution indicators sewage sludge conditioning treatment land application soil

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Geochemistry and Tectonic Setting of the Eshan Granites in the Southwestern Margin of the Yangtze Plate, Yunnan

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Journal of Earth science 2018年第1期29卷 130-143页

作者： Jin Hu Shitao Zhang Guangzheng Zhang Siyu Tao Ying Zhang Faculty of land resource Engineering Kunming University of Science and Technology

The extensive Eshan granites of Yunnan are made up of three intrusive units distin- guished by their field contact relations; in descending order of age they are the Pojiao Unit, the Liizicun Unit and the Mokela Unit. The Pojiao Unit and Luzicun Unit contain petrographically and geochemically similar rocks but contact relationships show that the latter is younger. The Mokela Unit mainly consists of dykes intruding the other two and has petrographic and geochemical differ-ences. Zircon U/Pb dating and zircon crystallization temperature measurements confirm the se- quence of intrusions. Major and trace element analyses suggest that the magmas of the Pojiao Unit granites derived by partial melting of a clay-poor source from the upper crust; the magmas of the Luzicun Unit granites derived by partial melting of upper crust with a small proportion of middle crust accompanied by crystallization of albite which triggered strength reduction. Both magmas mixed and underwent with crustal contamination, assimilation and fractional crystallization. The magmas of the Mokela Unit derived from residual melts and assimilation of argillaceous rocks. A time sequence of melting, intrusion and deformation events is derived from these results and com- pared with other published tectonic models for the evolution of the SW margin of the Yangtze Plate. Magmatism was initiated by exhumation of upper continental crust during which strongly peralu- minous porphyritic biotite monzogranite granites were produced at ca. 854-852 Ma, and the genesis of two-mica granite reflected a later batch of exhumed melts with crustal contamination, assimilation and fractional crystallization at ca. 842 Ma. Finally biotite alkali-feldspar granite and tourmaline granite magmas experienced strong fractional crystallization, emplaced in the cooling stage at ca. 823 Ma, indicating the end of exhumation.

关键词： Yangtze Plate Eshan granite tectonic evolution continental exhumation post-collision.

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Using Machine Learning to Identify and Optimize Sensitive Parameters in Urban Flood Model Considering Subsurface Characteristics

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International Journal of Disaster Risk science 2024年第1期15卷 116-133页

作者： Hengxu Jin Yu Zhao Pengcheng Lu Shuliang Zhang Yiwen Chen Shanghua Zheng Zhizhou Zhu Key Laboratory of VGE of Ministry of Education Nanjing Normal UniversityNanjing 210023China Jiangsu Center for Collaborative Innovation in Geographical Information resource Development and Application Nanjing 210023China

This study presents a novel method for optimizing parameters in urban flood models,aiming to address the tedious and complex issues associated with parameter ***,a coupled one-dimensional pipe network runoff model and a two-dimensional surface runoff model were integrated to construct an interpretable urban flood ***,a principle for dividing urban hydrological response units was introduced,incorporating surface attribute *** K-means algorithm was used to explore the clustering patterns of the uncertain parameters in the model,and an artificial neural network(ANN)was employed to identify the sensitive ***,a genetic algorithm(GA) was used to calibrate the parameter thresholds of the sub-catchment units in different urban land-use zones within the flood *** results demonstrate that the parameter optimization method based on K-means-ANN-GA achieved an average Nash-Sutcliffe efficiency coefficient(NSE) of *** to the ANN-GA and K-means-deep neural networks(DNN) methods,the proposed method better characterizes the runoff generation and flow *** study demonstrates the significant potential of combining machine learning techniques with physical knowledge in parameter optimization research for flood models.

关键词： Artifcial neural network Coupled urban fooding model Genetic algorithm K-means algorithm Subcatchment delineation Uncertain parameters

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