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寒旱区科学（英文版）
寒旱区科学（英文版）

程国栋

双月刊

1674-3822

SCAR@lzb.ac.cn

0931-4967733

730000

甘肃省兰州市东岗西路320号

寒旱区科学（英文版）/Journal Sciences in Cold and Arid RegionsCSCD北大核心
查看更多>>《寒旱区科学》及时报道寒冷、干旱环境下, 地球表层系统的过程和格局研究的最新成果。寒区研究: 侧重低温环境下, 寒区特殊的物理过程、 化学过程和生物过程及其相互作用的研究; 强调冰冻圈对全球变化和人类活动的响应, 及其对环境的影响和适应对策; 突出冰川,积雪, 河、 湖、海冰, 多年和季节冻土, 冰缘地貌等研究对象; 重视寒区工程技术。旱区研究: 侧重干旱环境下, 旱区特殊的物理过程、化学过程和生物过程及其相互作用的研究; 强调旱区环境对人类活动和全球变化的响应, 及其对环境的影响和适应对策; 突出沙漠、绿洲、黄土和风沙地貌等研究对象; 扶植干旱区流域, 以水为主线, 山地-荒漠-绿洲系统的综合集成研究, 积极为旱区的水安全、生态安全和粮食安全提供可靠的科学技术支撑。读者对象为从事寒旱区科学研究的广大研究人员和有关专业的院校师生以及相关领域的管理干部。
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    Effect of soil archaea on N2O emission in alpine permafrost

    YuZheng GuChenJie DongShengYun ChenJingWei Jin...
    45-62页
    查看更多>>摘要：Soil microbial communities are pivotal in permafrost biogeochemical cycles,yet the variations of abundant and rare microbial taxa and their impacts on greenhouse gas emissions in different seasons,remain elusive,especially in the case of soil archaea.Here,we conducted a study on soil abundant and rare archaeal taxa during the growing and non-growing seasons in the active layer of alpine permafrost in the Qinghai-Tibetan Plateau.The results suggested that,for the archaeal communities in the sub-layer,abundant taxa exhibited higher diversity,while rare taxa maintained a more stable composition from the growing to non-growing season.Water soluble organic carbon and soil porosity were the most significant environmental variables affecting the compositions of abundant and rare taxa,respectively.Stochastic and deterministic processes dominated the assemblies of rare and abundant taxa,respectively.The archaeal ecological network influenced N2O flux through different modules.Rare taxa performed an essential role in stabilizing the network and exerting important effects on N2O flux.Our study provides a pioneering and comprehensive investigation aimed at unravelling the mechanisms by which archaea or other microorganisms influence greenhouse gas emissions in the alpine permafrost.
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    Analysis of strength characteristics of loess before and after freezing using a hollow cylinder torsional shear apparatus

    Peng ShenQingZhi WangJianHong FangChenWei Wang...
    63-72页
    查看更多>>摘要：This paper aims to comprehensively analyze the influence of the principal stress angle rotation and intermediate principal stress on loess's strength and deformation characteristics.A hollow cylinder torsional shear apparatus was utilized to conduct tests on remolded samples under both normal and frozen conditions to investigate the mechanical properties and deformation behavior of loess under complex stress conditions.The results indicate significant differences in the internal changes of soil particles,unfrozen water,and relative positions in soil samples under normal and frozen conditions,leading to noticeable variations in strength and strain development.In frozen state,loess experiences primarily compressive failure with a slow growth of cracks,while at normal temperature,it predominantly exhibits shear failure.With the increase in the principal stress angle,the defor-mation patterns of the soil samples under different conditions become essentially consistent,gradually tran-sitioning from compression to extension,accompanied by a reduction in axial strength.The gradual increase in the principal stress axis angle(α)reduces the strength of the generalized shear stress and shear strain curves.Under an increasing α,frozen soil exhibits strain-hardening characteristics,with the maximum shear strength occurring at α=45°.The intermediate principal stress coefficient(b)also significantly impacts the strength of frozen soil,with an increasing b resulting in a gradual decrease in generalized shear stress strength.This study provides a reference for comprehensively exploring the mechanical properties of soil under traffic load and a reliable theoretical basis for the design and maintenance of roadbeds.
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    The changes in the annual distribution of mountain runoff during the period of 1965-2018 in Hexi Corridor,Northwest China

    Yan LuoZhiXiang LuQi FengMeng Zhu...
    73-83页
    查看更多>>摘要：The annual distribution characteristics of river runoff in arid regions have significant implications for water resource stability and management.Based on the mountain runoff data from 1965 to 2018,this study examines the annual change characteristics of monthly runoff of the Shiyang River Basin,Heihe River Basin,and Shule River Basin in the Hexi Corridor,Northwest China.Many indexes are used and analyzed,including the coefficient of variance,the complete regulation coefficient,the concentration degree and concentration period,the magni-tude of change,the skewness coefficient,and the kurtosis coefficient of the annual distribution curves.The results reveal the following:(1)The inhomogeneity of annual runoff distribution in the Taolai River and the rivers to the west of it,except the Shiyou River,show an increasing trend.Conversely,the inhomogeneity of the rivers to the east of the Taolai River generally show a downward trend,but the coefficient of variance value is still very high.(2)In the Shiyang River Basin,the annual distribution of the concentration period is characterized by a relatively discrete pattern.Conversely,the Heihe River Basin exhibits a relatively concentrated pattern,and the distribution pattern of the Shule River Basin is quite different.Notably,all concentration periods in the three basins have shifted backward after the 2000s.(3)The Shiyang River Basin exhibits disordered annual distribution curves of runoff in different years.In contrast,the Heihe River Basin presents a typical'single-peak'pattern with a prominent right-skewed.The Shule River Basin has regular distribution curves,with a gradually significant'double-peak'pattern from east to west Overall,there has been a slight change in runoff in the Shiyang River Basin,while the Heihe River Basin and Shule River Basin have experienced significant increases in runoff.The annual distribution curves of runoff in the Liyuan River and the rivers to the east of it exhibit a gentle peak pattern,and the appearance probability of extreme runoff during the year is low.Conversely,the rivers to the west of the Liyuan River,excluding the Danghe River,display a sharp peak and thick tail pattern,indicating that the appearance probability of extreme runoff during the year is high.These findings have practical implications for the planning and management of water resources in the Hexi Corridor.Moreover,they provide a solid foundation for predicting future changes in regional water resources.
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    Analysis on characteristics of extreme precipitation indices and atmospheric circulation in Northern Shanxi

    Xia CaiYan SongLin CaiXin Su...
    84-97页
    查看更多>>摘要：This article utilizes daily precipitation data from 28 national meteorological stations in northern Shanxi Province spanning from 1972 to 2020,and the US NCEP/NCAR monthly average reanalysis and ERAS monthly average reanalysis data.The study employs techniques such as empirical orthogonal function(EOF)decomposition,Mann-Kendall mutation and other methods to investigate the spatiotemporal distribution of extreme precipitation index in northern Shanxi and their correlation with atmospheric circulation.The research results show that the absolute index,relative index,intensity index and sustained dry period index(CDD)in the continuous index appear from southwest to northeast.The spatial distribution characteristics of the central region decrease,while the contin-uous wet period(CWD)decreases from the central to the east and west.The three indices Rx1day,Rx5day,and CWD mutated in 1978,1975,and 1983 respectively,and other extreme precipitation indices all appeared in a sudden change from a low-value period to a high-value period occurred around 2010.In the high-value years of the summer extreme precipitation index,there is a significant negative anomaly in the height field in the mid-high latitude regions of Eurasia.Northern Shanxi is controlled by a broad low-pressure trough in the Lake Baikal area.Water vapor transported via the east,west,and south routes converges in the northern Shanxi region and en-counters cold air from the north.There is a strong upward motion anomaly at 500 hPa in the troposphere,and the dynamic conditions of upper-level divergence and lower-level convergence lead to more summer extreme pre-cipitation in the northern Shanxi region.Conversely,in the low-value years of the summer extreme precipitation index,northern Shanxi is affected by a strong high-pressure ridge north of Lake Baikal.There is a downward motion anomaly at 500 hPa,and the northern Shanxi region lacks water vapor.The cold and warm air cannot converge,and both the water vapor conditions and dynamic conditions are poor,which is not conducive to the production of extreme precipitation in northern Shanxi.
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    Bibliometric analysis of the status and trend of biological soil crusts research from 1912 to 2023

    XiaoJu YangFaSi WuLong LiQingLin Guo...
    98-108页
    查看更多>>摘要：Biological soil crusts(BSCs)play an important role in soil development and ecological function,and it is more important for quantitatively analyzing the processes and trends of BSCs to identify the advantages and disad-vantages of BSCs research for the development and application of BSCs theory.Bibliometric analysis of 2,186 BSCs literatures from Web of Science showed an exponential growth trend,as China and the United States as the top 2 in terms of publication volume.High quality publications are mainly from European and American coun-tries,such as the United States,Germany and Spain.The top 3 publishers are Journal of Arid Environments,Soil Biology & Biochemistry and Plant and Soil,and disciplines include ecology,environmental science,and soil science,etc..Research institutions mainly affiliate to the Chinese Academy of Sciences,United States Department of the Interior,United States Geological Survey,Hebrew University of Jerusalem,Consejo Superior de Inves-tigaciones Cientificas,and Universidad Rey Juan Carlos.Authors mainly come from United States,Israel,Spain and China.Funds are mainly from the National Natural Science Foundation of China,Spanish Government,Chinese Academy of Sciences,and National Science Foundation of the United States.Biological soil crusts(bio-crusts,cyanobacteria,lichens,moss crusts,bryophytes),drylands,climate change,photosynthesis and desert are high-frequency keywords.Future research will focus on the driving mechanisms of BSCs on global biogeochemical cycles,maintaining global biodiversity on important ecological processes,global C,N,and P cycles.The impact on biological invasion,sandstorms,and water balance,multifunctional and reciprocal mechanisms for maintaining the stability of desert and sandy ecosystems,and impact on the formulation of management policies for arid ecosystems,corresponding to global climate change,and the estimation of regional,local,and microscale dis-tribution of BSCs based on machine deep learning modeling gradually focus on.The ecosystem service functions of BSCs,the soil and water conservation and soil stability mediated by BSCs in arid and semi-arid regions,and the excavation of stress resistant genes for BSCs will be emphasized.
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