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regionalclimate Characteristics of regional climate change and pattern analysis on ordos plateau

Journal of Environmental Sciences 2002年第4期14卷 568-576页

作者： LI Guo qing ZHENG Yuan run Laboratory of Quantitative Vegetation Ecology Institute of BotanyChinese Academy of SciencesBeijing 100093China.

The characteristics of precipitation, temperature and their combination determine the special ecological environment pattern of ordos plateau. Analyzing its evolutionary trend attributes to understanding the succession process of the ecological environment of ordos plateau and has crucial instructional significance on the ecological restoration research being conducted in this region. Four time scales, arranging from ten days, one month, one season(growing season contrasting to non growing season)to one year were adopted to analyze the climate data which included nearly 30 years and were collected by eight weather stations on ordos plateau. The results indicated that the mean annual temperature and the mean monthly temperature of February, September and December, had increased significantly during the late 30 years. The annual precipitation did not show significant changes but its distribution pattern had changed obviously. The ratio of precipitation of major growing season (May October)to annual precipitation had increased distinctively,and five counties' precipitation reached statistically significant level. And the ratio of precipitation of latter growing season (September)to one year decreased significantly while the ratio of non growing season(November next April)to one year changed insignificantly. The results showed that maybe the interaction of increased mean temperature and insignificant change of precipitation in non growing season was one of the reasons why the desertification of the region was deteriorating in recent years. Using some factors closely relating to vegetation succession such as mean annual temperature, mean annual precipitation, distributive pattern of precipitation, mean temperature of the coldest month, mean temperature of the warmest month, precipitation of the warmest month, mean temperature of growing season, precipitation of growing season, potential evapotranspiration(PET)and radiative dryness index(RDI), to synthetically anal

关键词： climate change climatic synthetical regionalization restoration ecology ordos plateau

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Human induced dryland degradation in ordos plateau,China,revealed by multilevel statistical modeling of normalized difference vegetation index and rainfall time-series

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Journal of Arid Land 2014年第2期6卷 219-229页

作者： Jing ZHANG JianMing NIU Tongliga BAO Alexander BUYANTUYEV Qing ZHANG JianJun DONG XueFeng ZHANG College of Life Sciences Inner Mongolia University College of Environment and Resources Dalian Nationalities University Sino-US Center for Conservation Energyand Sustainability ScienceInner Mongolia University Faculty of Resources and Environment Baotou Teachers College Department of Botany and Plant Sciences University of California

Land degradation causes serious environmental problems in many regions of the world, and although it can be effectively assessed and monitored using a time series of rainfall and a normalized difference vegetation index （NDVI） from remotely-sensed imagery, dividing human-induced land degradation from vegetation dynamics due to climate change is not a trivial task. This paper presented a multilevel statistical modeling of the NDVI-rainfall relationship to detect human-induced land degradation at local and landscape scales in the ordos plateau of Inner Mongolia, China, and recognized that anthropogenic activities result in either positive （land restoration and re-vegetation） or negative （degradation） trends. Linear regressions were used to assess the accuracy of the multi- level statistical model. The results show that：（1） land restoration was the dominant process in the ordos plateau between 1998 and 2012; （2） the effect of the statistical removal of precipitation revealed areas of human-induced land degradation and improvement, the latter reflecting successful restoration projects and changes in land man- agement in many parts of the ordos; （3） compared to a simple linear regression, multilevel statistical modeling could be used to analyze the relationship between the NDVI and rainfall and improve the accuracy of detecting the effect of human activities. Additional factors should be included when analyzing the NDVI-rainfall relationship and detecting human-induced loss of vegetation cover in drylands to improve the accuracy of the approach and elimi- nate some observed non-significant residual trends.

关键词： NDVl-rainfall relationship anthropogenic activities multilevel statistical modeling land degradation dryland ordos plateau

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Diurnal and seasonal dynamics of soil respiration in desert shrubland of Artemisia ordosica on ordos plateau of Inner Mongolia, China

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Journal of Forestry Research 2007年第3期18卷 231-235页

作者： JIN Zhao QI Yu-chun DONG Yun-she Institute of Geographical Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 P. R. China Graduate School of the Chinese Academy of Sciences Beijing 100039 P. R. China

The diurnal and seasonal dynamics of soil respiration in the A. ordosica shrubland on ordos plateau were investigated in the growing season （May-October） of 2006 and their environmental driving factors were also analyzed, Results indicated that diurnal dynamics of soil respiration rate and its temperature dependence showed some discrepancy in two different growth stages （the vegetative growth stage and the reproductive growth stage）. During the vegetative growth stage, the diurnal variation of soil respiration was slight and not correlated with the daily temperature change, but during the reproductive growth stage, the daily respiration variation was relatively large and significantly correlated with the diurnal variation of air and soil temperature. In the growing season, the peak value of soil respiration occurred at July and August because of the better soil water-heat conditions and their optimal deployment in this period. In the shrubland ecosystem, precipitation was the switch of soil respiration pulses and can greatly increase soil respiration rates after soil rewetting. Moreover, the soil respiration rates in the growing season and the air temperature and soil surface water content were closely correlated （p〈0.05） each other. The stepwise regression model indicated that the variation of soil surface moisture accounted for 41.9% of the variation in soil respiration （p〈0.05）.

关键词： Soil respiration Shrubland Artemisia ordosica ordos plateau

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Using a Particle Tracking Method to Quantify Groundwater Circulation rates: a Case Study in the ordos plateau

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Journal of Groundwater Science and Engineering 2013年第1期1卷 97-101页

作者： Lihe Yin Hongyun Ma Jiaqiu Dong Xiaoyong Wang Ying Li Xi’an Institute of Geology and Mineral Resources

Groundwater is a valuable resource in many areas, and commonly plays a key role in economic development. Therefore, groundwater circulation rates at different depths are key issues for groundwater development and management in the ordos plateau. In this study, a particle tracking method was used to quantify circulation rates in the ordos plateau. The results show that groundwater mainly circulates in shallow groundwater systems up to 400m depth. The results of this study can be used to develop effective programs for groundwater management and development..

关键词： particle tracking method groundwater circulation ordos plateau

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Precipitation pulses and soil CO2 emission in desert shrubland of Artemisia ordosica on the ordos plateau of Inner Mongolia,China

Precipitation pulses and soil CO2 emission in desert shrubla...

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中国地理学会百年庆典

作者：金钊董云社齐玉春 Manfred DOMROES State Key Laboratory of Loess and Quaternary Geology Institute of Earth EnvironmentChinese Academy of Sciences Institute of Geographical Sciences and Natural Resources Research Chinese Academy of Sciences Institute of Geography Mainz University

Precipitation is the major driver of ecosystem functions and processes in semiarid and arid *** such water-limited ecosystems,pulsed water inputs directly control the belowground processes through a series of soil drying and rewetting *** investigate the effects of sporadic addition of water on soil carbon efflux,an artificial precipitation event(3 mm) was applied to a desert shrub ecosystem in the Mu Us Sand Land of the ordos plateau in *** respiration rapidly increased 2.8--4.1 times immediately after adding water in the field,after which it returned to background level within 48 *** the experiment,soil CO production was between 2047.0 and 7383.0 mg *** the shrubland,soil respiration responses showed spatial variations,having stronger pulse effects beneath the shrubs than in the interplant *** spatial variation of the soil respiration responsiveness was noted to be closely related with the heterogeneity of soil substrate *** from precipitation,soil organic carbon and total nitrogen pool were also identified as determinants of soil CO loss in desert ecosystems.

关键词： Artemisia ordosica ordos plateau Precipitation pulses Soil respiration

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Seismic anisotropy and implications for mantle deformation beneath the NE margin of the Tibet plateau and ordos plateau

Seismic anisotropy and implications for mantle deformation b...

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中国科学院地质与地球物理研究所第11届（2011年度）...

作者： Juan Li~(a,*),Xiujiao Wang~a,Fenglin Niu~b a Key Laboratory of the Earth’s Deep Interior,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing China b Department of Earth Sciences,Rice University,USA

The northeastern Tibet and the ordos plateau connects east China and west China,which are dominated by horizontal extension and compression,*** of seismic anisotropy beneath this transitional region can provide important constraints on deformation pattern of the crust and lithosphere mantle during an orogeny *** measured SKS wave splitting parameters from the new installed regional networks and obtained a detailed anisotropy map for 119 broadband *** the NE margin of Tibet,the observed WNW fast polarization direction is parallel to the surface geological features. The coherence between the observed geodetic motion of the crust and fast axis direction suggests that the vertical coherent deformation of the lithosphere is the dominate source for the observed seismic *** east to the Qinling orogenic belt,the fast axis direction tracks change in strike of the faults,with the fast direction aligning almost *** suggest that both the lithosphere mantle and east extrusion of mantle material contribute to the observed *** value of delay time is observed interior the thick-rooted ordos plateau,suggesting a rigid and stable lithosphere with little deformation. The deviation of fast polarization direction beneath the adjacent rifting regions might be caused by the edge flow induced by sharp changes in the thickness of *** results propose that the upper crust and mantle lithosphere beneath the northeastern Tibet are at least partly coupled,or subjected to the same boundary conditions,which is inconsistent with the channelized lower crustal flow model.

关键词： Seismic anisotropy Mantle deformation SKS splitting Tibet plateau ordos plateau

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Impact of water table on hierarchically nested groundwater flow system

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Journal of Groundwater Science and Engineering 2024年第2期12卷 119-131页

作者： Jun Zhang Rong-zhe Hou Kun Yu Jia-qiu Dong Li-he Yin Key Laboratory of Groundwater and Ecology in Arid and Semi-arid Areas Xi'an Center of Geological SurveyChina Geological SurveyXi'an 710054China

Water table configuration gives rise to hierarchically nested groundwater flow ***,there remains a lack of comprehensive understanding regarding the controlling factors of water table and its impact on flow ***,it remains challenging to identify characteristics of water table space variation through limited groundwater observations at the regional *** on two ideal two-dimensional cross-section analytical models,this study presents a simplified approach to preliminarily assess the nonlinear interactions between water table variation and three driving factors:Topography,geol-ogy and *** criteria,C1 and C2,are utilized to address issues at different scales ranging from basin to local:(i)the influence of various factors on water table configuration;and(ii)the influence of water table on groundwater flow ***,the ordos plateau is taken as an example to explore the role of the water table in nested groundwater systems using the provided approach and *** applica-tion of this approach in the ordos plateau demonstrates its appropriateness as a practical method for prelim-inarily determining the characteristics of water table configuration and its impact on flow *** study explores the mechanism influencing spatial variation in the water table and improves understanding of the interaction between topography,geology,and climate on groundwater flow patterns.

关键词： Water table configuration Groundwater flow pattern Analytical models Top boundary condi-tions ordos plateau

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新石器时代以来鄂尔多斯高原人类活动遗址研究

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Journal of Geographical Sciences 2023年第11期33卷 2338-2356页

作者：温鹏辉王乃昂李明娟程弘毅牛震敏 College of History and Culture Wooden Slips Research AcademyNorthwest Normal UniversityLanzhou 730070China College of Earth and Environmental Sciences Center for Glacier and Desert ResearchLanzhou UniversityLanzhou 730000China School of Geography and Planning Ningxia UniversityYinchuan 750021China

Settlements are excellent spatiotemporal indicators for studying historical human activities and environmental *** paper discusses the spatial and temporal changes of sites on the ordos plateau in China since the Neolithic Age,based on an analysis of spatiotemporal distribution characteristics of the human *** frequency of human settlements on the ordos plateau presented a phased fluctuation process,and the sizes were mainly small and *** spatial distribution of human settlements was fractal,and the D value of the aggregation dimension was generally small,indicating that the spatial distribution of the sites was *** by the desert,the sites were mainly distributed in the south and east of the ordos *** spatiotemporal distribution pattern of human settlements in the ordos plateau resulted from the combined action of natural and human factors,especially climate ***,local livelihood patterns significantly affected the frequency of human *** number of human settlements in the farming period was large,and the distribution was *** contrast,the number of sites in the nomadic period was small and *** central government’s policies and the conflicts between farming and nomadic groups further affected the spatiotemporal distribution of human *** study may contribute to a better understanding of historical environmental change and human-land relationships in the ordos plateau.

关键词： human settlements spatiotemporal distribution environmental change human activities ordos plateau

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Fertile island effect in the sedimentary process of Tetraena mongolica Maxim nebkhas in steppe–desert ecotones on the Inner Mongolia plateau,China

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Journal of Mountain Science 2022年第10期19卷 2791-2805页

作者： ZHAI Bo DANG Xiao-hong LIU Xiang-jie WANG Ji College of Desert Science and Engineering Inner Mongolia Agricultural UniversityHohhot 010018China Desert Forestry Experimental Center Chinese Academy of ForestryDeng kou 015200China National Positioning Observation Research Station of Hangjin Desert Ecosystem Ordos 017400China

Phytogenic mounds(nebkhas)formed by shrubs are a common phenomenon in arid and semiarid *** formation of nebkhas is accompanied by the appearance of the fertile island *** evaluation of the shrub sand compost island effect is a key link in preventing soil erosion and nutrient *** study took the typical shrub Tetraena mongolica in desert areas as the research object and quantified the sand-trapping capacity of the *** revealed the influence of sediment texture and volumetric soil water content on fertile islands during the development of *** *** results showed that(1)the single shrub intercepted large amounts of sediments due to the high density of branches of ***,forming nebkhas that were positively correlated with the shrub size.(2)The overall soil nutrient content below the shrub was greater than the soil nutrient content outside the shrub,forming a typical fertile island *** soil organic carbon(SOC),alkaline hydrolytic nitrogen(AHN),available phosphorus(AP),and available K(AK)content all increased gradually with increasing nebkha *** with the deep soil of nebkhas,the nutrient content of the surface soil was generally higher.(3)There was a positive correlation between the volumetric water content and nutrient content in nebkhas.(4)The semi-ellipsoid shape of *** enabled it to intercept large amounts of coarse-grained *** sand(100–250μm)was the main particle size in the sediment aggregates inside the *** fine sand content generally increased with increasing shrub *** analysis(RDA)revealed that the fine sand content of the nebkha sediments had a strong positive correlation with the soil nutrient *** paper provides an example for evaluating the fertile island effect during the deposition process of nebkhas in the desert transition zone.

关键词： Nebkhas Sediments Particle-size distribution Fertile island Tetraena mongolica ordos plateau

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Seasonal Patterns of Soil Respiration in Three Types of Communities along Grass-Desert Shrub Transition in Inner Mongolia, China

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Advances in Atmospheric Sciences 2009年第3期26卷 503-512页

作者：金钊齐玉春董云社 Manfred DOMROES Institute of Geographical Sciences and Natural Resources Research Chinese Academy of SciencesBeijing 100101 State Key Laboratory of Loess and Quaternary Geology Institute of Earth EnvironmentChinese Academy of SciencesXi'an 710075 Institute of Geography Mainz UniversityMainz 55099Germany

The seasonal dynamics of soil respiration in steppe （S. bungeana）, desert shrub （A. ordosica）, and shrubperennial （A. ordosica ＋C. komarovii） communities were investigated during the growth season （May to October） in 2006; their environmental driving factors were also analyzed. In the three communities, soil respiration showed similar characteristics in their growth seasons, with peak respiration values in July and August owing to suitable temperature and soil moisture conditions during this period. Meanwhile, changes in soil respiration were greatly influenced by temperatures and surface soil moistures. Soil water content at a depth of 0 to 10 cm was identified as the key environmental factor affecting the variation in soil respiration in the steppe. In contrast, in desert shrub and shrub-perennial communities, the dynamics of soil respiration was significantly influenced by air temperature. Similarly, the various responses of soil respiration to environmental factors may be attributed to the different soil textures and distribution patterns of plant roots. In desert ecosystems, precipitation results in soil respiration pulses. Soil carbon dioxide （CO2） effluxes greatly increased after rainfall rewetting in all of the ecosystems under study. However, the precipitation pulse effect differed across the ecosystem. We propose that this may be a result of a reverse effect from the soil texture.

关键词： soil respiration grass-desert shrub transition Stipa bungeana Artemisia ordosica Artemisiaordosica + Cynanchum komarovii ordos plateau

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