Showing 50 of 516 papers in Earth & Space

Postprint of Soil Nutrient and Stoichiometric Characteristics of Russian Olive Shelterbelt in the Kubuqi Desert

Shi Shiling, Xiaomeng Ren, Zhang Xiaowei
2022-03-28 ChinaXiv: chinaxiv-202203.00090

To investigate the soil nutrient and stoichiometric characteristics of Elaeagnus angustifolia shelterbelts on the northeastern edge of the Kubuqi Desert, and to provide a theoretical basis for the sustainable utilization of desert shelterbelts, we selected 30 m × 30 m representative sample plots in …

Variation Characteristics of Soil Extracellular Enzyme Activity and Stoichiometry During Biological Soil Crust Formation on the Loess Plateau (Postprint)

Yao Hongjia, Baorong Wang, An Shaoshan
2022-03-28 ChinaXiv: chinaxiv-202203.00091

Biological soil crusts play crucial roles in enhancing soil resistance to water and wind erosion and improving soil nutrient conditions. Soil extracellular enzyme activity can serve as a microbial indicator of soil biochemical reaction intensity and is of great significance for understanding nutrien…

Analysis of Spatiotemporal Variation in Water Resource Security Based on Agricultural Water Footprint: A Case Study of Hotan Region, Xinjiang (Postprint)

Zhang Lili, Deng Xiaoya, Long Aihua
2022-03-28 ChinaXiv: chinaxiv-202203.00093

The Hotan region is a typical inland arid area, and studying regional water resource security is of great significance for guiding water resource development and utilization, and promoting the sustainable development of socio-economy and water resources. Based on the water footprint theory, this pap…

Hydrochemical Characteristics and Water Quality Assessment of Groundwater in the Plain Area of the Turpan Basin (Postprint)

Bai Fan, Zhou Jinlong
2022-03-28 ChinaXiv: chinaxiv-202203.00094

To investigate the hydrochemical characteristics and water quality status of groundwater in the plain area of the Turpan Basin, 44 sets of groundwater quality monitoring data (33 sets of phreatic water and 11 sets of confined water) were selected based on the comprehensive groundwater pollution surv…

Postprint: Reservoir Optimal Operation for Multi-object Ecosystem Protection and Restoration

Liu Zhejie, Bai Tao, Gao Fan
2022-03-28 ChinaXiv: chinaxiv-202203.00095

Over the past 20 years, with the implementation of integrated water resources planning and scheduling in the Tarim River (hereinafter referred to as the "Tarim River") basin, the ecological water conveyance target of "water flowing to Taitema Lake, with Daxihaizi Reservoir discharging 3.50×108 m³ an…

Lake Balkhash Water Balance Variations and Their Influencing Factors over the Past 60 Years: Postprint

Wang Zheng, Huang Yue, Liu Tie, Zhong Ruisen
2022-03-28 ChinaXiv: chinaxiv-202203.00096

Based on hydrological observation and remote sensing monitoring data, this study obtains information on the area and water level changes of Lake Balkhash over the past 60 years, reconstructs the time series of lake water volume changes, and identifies the characteristics of water volume variations i…

Spatiotemporal Variation and Contribution Analysis of Land Surface Temperature in the Tianshan North Slope Urban Agglomeration: Postprint

Hongwu Liang, Alimjan Kasim, Zhao Hemiao
2022-03-28 ChinaXiv: chinaxiv-202203.00097

The accelerated advancement of urbanization has intensified land use changes, consequently leading to increasingly prominent urban thermal environment issues. Based on MYD21A2 land surface temperature data from the summers of 2005 and 2018, spatial statistical methods were employed to analyze the sp…

Snowmelt-Coupled Xin'anjiang Model for Runoff Simulation in Arid Regions: A Postprint

Zhang Meijie, Lü Haishen, Liu Di
2022-03-28 ChinaXiv: chinaxiv-202203.00098

Within the Xiying River basin above the Jiutiaoling Station, daily data from gridded precipitation and air temperature datasets for the period 2011–2018 were utilized to develop a method for correcting anomalous gridded precipitation points through exploration of the precipitation-runoff causal rela…

Postprint: Applicability Assessment of TIGGE Precipitation Forecasts in Arid and Semi-Arid Regions of China

He Chaolu, Lü Haishen
2022-03-28 ChinaXiv: chinaxiv-202203.00099

As an important component of the currently most authoritative dataset for medium-range ensemble forecasting, the applicability of TIGGE precipitation products in the arid and semi-arid regions of China requires further investigation. Based on observed precipitation data from 2015–2017 in the arid an…

Spatiotemporal Characteristics and Trend Analysis of Precipitation in the Aral Sea Basin: Postprint

Wang Haoxuan, Huang Feng
2022-03-28 ChinaXiv: chinaxiv-202203.00100

Based on the monthly precipitation series of the Aral Sea basin from 1945 to 2019 derived from the CRU (Climate Research Unit) dataset, this study analyzed the spatiotemporal characteristics of annual precipitation variation, intra-annual distribution of precipitation, and complexity changes in prec…

Precipitation Geochemistry and Controlling Factors at the Koxkar Glacier Terminus, Tianshan Mountains: Postprint

Wang Jian, Han Haidong
2022-03-28 ChinaXiv: chinaxiv-202203.00101

Summer precipitation was sampled at the terminus of Koxkar Glacier on the southern slope of the Tianshan Mountains in an inland alpine region. Based on the analysis of ion concentrations, conductivity, and pH values, factor analysis, enrichment factors, and backward trajectory methods were employed …

Adjustment of precipitation measurements using Total Rain weighing Sensor (TRwS) gauges in the cryospheric hydrometeorology observation (CHOICE) system of the Qilian Mountains, Northwest China (Postprint)

ZHAO Yanni, CHEN Rensheng, HAN Chuntan, WANG Lei, CHEN Rensheng
2022-03-24 ChinaXiv: chinaxiv-202203.00076

Precipitation is one of the most important indicators of climate data, but there are many errors in precipitation measurements due to the influence of climatic conditions, especially those of solid precipitation in alpine mountains and at high latitude areas. The measured amount of precipitation in …

Very Large Area Gamma-ray Space Telescope Program

Fan Yizhong, Chang Jin, Guo Jianhua, Yuan Qiang, Hu Yiming, Li Xiang, Yue Chuan, Huang Guangshun, Liu Shubin, Feng Changqing, Zhang Yunlong, Wei Yifeng, Sun Zhiyu, Yu Yuhong, Kong Jie, Zhao Chengxin, Zang Jingjing, Jiang Wei, Pan Xu, Wei Jiaju, Wang Shen, Duan Kaikai, Shen Zhaoqiang, Xia Ziqing, Xu Zunlei, Feng Lei, Huang Xiaoyuan, Cai Yuelin, Wei Junjie, Zeng Houdun, He Haoning, Li Jian, Yang Ruizhi, Yan Jingzhi, Zhang Yi, Wu Xuefeng, Wei Daming, Yizhong Fan, Chang Jin
2022-03-15 ChinaXiv: chinaxiv-202203.00033

High-energy gamma-ray detection represents one of the primary approaches for investigating extreme astrophysical phenomena. Space-based high-energy gamma-ray detection provides exceptional advantages, including wide energy band coverage, excellent temporal continuity, and high energy resolution. Bui…

How Relational Dependency Affects the Growth and Development of Global City Networks: A Case Study of Apple iPhone Suppliers (Postprint)

Liu Qing
2022-02-11 ChinaXiv: chinaxiv-202202.00016

Current urban network research exhibits a tendency to emphasize structural characteristic measurement while relatively neglecting impact mechanism analysis. Furthermore, in studies on urban network impact mechanisms, there is an overemphasis on theoretical qualitative macro-descriptions or conventio…

Postprint: Analysis of Multi-system Synergy Level, Spatio-temporal Evolution, and Mechanism of Rural Tourism Public Services in China

Zhang Xincheng
2022-02-11 ChinaXiv: chinaxiv-202202.00018

By constructing a five-element system coupling model, this study measures the coordination degree of rural tourism public information services, safety and security services, transportation convenience services, people-benefit and convenience services, and public administrative services across 30 pro…

Research on Rural Revitalization Pathways in Arid Areas Based on Resource and Environmental Carrying Capacity: A Case Study of Ningxia (Postprint)

Li Jin
2022-02-11 ChinaXiv: chinaxiv-202202.00019

Resource and environmental carrying capacity constitutes a critical constraint on regional socio-economic development in arid zones. Elucidating the status of resource and environmental carrying capacity and investigating the distribution characteristics of resources and environment along with exist…

Study on the Evolution of Economic Linkage Network Structure and Its Impact on Economic Growth in the Guanzhong Plain Urban Agglomeration (Postprint)

Ye Shanshan
2022-02-11 ChinaXiv: chinaxiv-202202.00020

This study employs urban flow intensity to modify the traditional gravity model for constructing an economic linkage matrix, and utilizes social network analysis methods to examine the evolutionary characteristics of the economic linkage network structure and its impact on economic growth in the Gua…

Research on Optimal Spatial Settlement Patterns in the Hilly-Gully Region of the Loess Plateau in Northern Shaanxi: A Case Study of Donggou, Mizhi County (Postprint)

Tian Darui
2022-02-11 ChinaXiv: chinaxiv-202202.00021

The hilly-gully region of the Loess Plateau constitutes a critical challenge for new urbanization practices in western China. In the absence of clarified regional characteristics, the intervention of modern urban-rural planning and design has generated substantial impacts on the local environment an…

Spatiotemporal Differentiation and Driving Factors of Green Development in Xinjiang's Urbanization (Postprint)

Zhang Junmin
2022-02-11 ChinaXiv: chinaxiv-202202.00023

As a key focus of the Western Development Strategy and a core area of the Belt and Road Initiative, Xinjiang's urbanization exhibits distinct regional characteristics and geopolitical attributes. Scientifically diagnosing and identifying the driving factors of green urbanization development can prov…

Ecosystem Service Trade-offs in the Spatial Restructuring of Grain Production on the Loess Plateau: A Case Study of Yulin City, Northern Shaanxi (Postprint)

Yang Haijuan
2022-02-11 ChinaXiv: chinaxiv-202202.00025

The restructuring of grain production space concentrates the principal contradictions in land system change; exploring the trade-off dynamics of ecosystem services during this process helps clarify the conflicts among food security, ecological restoration, and economic development, thereby promoting…

Spatiotemporal variation of forest land and its driving factors in the agropastoral ecotone of northern China Postprint

WANG Shiqing, TAO Zefu, SUN Piling, CHEN Sijia, SUN Huiying, LI Nan, SUN Piling
2022-01-30 ChinaXiv: chinaxiv-202202.00007

As an important natural resource, forest land plays a key role in the maintenance of ecological security. However, variations of forest land in the agropastoral ecotone of northern China (AENC) have attracted little attention. Taking the AENC as an example and based on remote-sensing images from 200…

Effects of Conservation Tillage on Water Storage, Moisture Conservation, and Yield in Dryland Wheat Fields in Longzhong: Postprint

Qi Xiaoping
2022-01-26 ChinaXiv: chinaxiv-202201.00094

To investigate the effects of conservation tillage on water storage and moisture conservation as well as yield formation in rainfed wheat fields on the Longzhong Loess Plateau. Based on a continuous 5-year field experiment, the effects of different tillage practices (conventional tillage T, straw mu…

Effects of Root Cutting and IBA Treatment on Root Quality and Seedling Growth of *Ammopiptanthus mongolicus* Postprint

Wang Jingjing
2022-01-26 ChinaXiv: chinaxiv-202201.00102

To address the forestry technical challenges of Ammopiptanthus mongolicus, characterized by long taproots, few fibrous roots, difficult seedling rooting, and low transplant survival rates, this study investigated different root pruning intensities combined with varying concentrations of hormone (IBA…

Postprint: Ecological Characteristics of Reed Populations in the Sandy Land on the Southern Margin of the Badain Jaran Desert

Liu Xin
2022-01-26 ChinaXiv: chinaxiv-202201.00103

Investigations were conducted on the modular characteristics, population age structure, dynamic features, and spatial distribution patterns of ramet populations of Phragmites australis naturally distributed in two sandy habitats (saline sandy land and ordinary sandy land) on the southern margin of t…

Floristic Composition, Distribution, and Resource Types of Annual Plants in the Deserts of Xinjiang (Postprint)

Jiaqian Du
2022-01-26 ChinaXiv: chinaxiv-202201.00105

Desert annual plants exhibit rapid growth rates and strong reproductive capacity, possessing significant forage, medicinal, and ecological value. Through literature review, verification of specimen collection records, and field surveys, this study clarifies the species richness, distribution pattern…

Postprint: Response of Soil Greenhouse Gas Emissions to Plastic Film Mulching in Cropping Systems in the Arid Region of Xinjiang

Wang Xuyang
2022-01-26 ChinaXiv: chinaxiv-202201.00106

Plastic mulching is an effective approach for improving crop yields in arid region farmlands and is widely applied in agricultural production. Investigating the response of soil greenhouse gas emissions to mulching under different cropping systems is of great significance for greenhouse gas mitigati…

Effects of Moisture on Soil Nitrogen Mineralization During Degradation Succession in Gahai Wetland (Postprint)

Song Liangcui
2022-01-26 ChinaXiv: chinaxiv-202201.00107

Moisture is the primary controlling factor of the nitrogen mineralization process in wetland soils and plays an important role in nitrogen cycling processes in wetland soils. Taking the Gannan Gahai Wetland as the study area, four degradation levels (Undegraded UD, Lightly Degraded LD, Moderately De…

Postprint: Water Consumption Characteristics and Evolution of Water Conveyance Methods in the Lower Reaches of the Tarim River

Zhou Long
2022-01-26 ChinaXiv: chinaxiv-202201.00109

Employing a combination of the water balance method, field investigation, and remote sensing imagery data, this study expounds upon the evolution of riverbed permeability performance and the water environment response characteristics under varying river channel water delivery methods following ecolo…

Analysis of Runoff Component Characteristics in Inland River Basins of Southwestern Tarim Basin under Climate Change: Postprint

Sun Congjian
2022-01-26 ChinaXiv: chinaxiv-202201.00112

Climate change has significantly impacted the water cycle in the high mountain regions of Central Asia, exacerbating regional water supply-demand conflicts. Understanding the characteristics of runoff components in inland rivers is crucial for water resource management. Based on meteorological and r…

Spatiotemporal Variations of Extreme Precipitation in the Guanzhong Plain and Their Relationship with Atmospheric Circulation (Postprint)

Ding Yingying
2022-01-26 ChinaXiv: chinaxiv-202201.00113

Based on daily precipitation data from 13 meteorological stations in the Guanzhong Plain from 1957 to 2019, various extreme precipitation indices were calculated using methods such as simple linear regression, Pearson correlation analysis, and wavelet coherence analysis, and their spatiotemporal var…

Applicability Assessment of Two Meteorological Datasets in Data-Scarce Regions: A Case Study of the Hutubi River Basin (Postprint)

Sun Mingyue
2022-01-26 ChinaXiv: chinaxiv-202201.00114

In data-scarce regions, the lack of observational data for precipitation, temperature, and other variables affects the accuracy of flood forecasting, thereby impacting flood control, drought resistance, water resources planning, and related efforts. Therefore, conducting applicability analysis of ex…

MCI-Based Analysis of Spatiotemporal Characteristics of Drought in Xinjiang over the Past 60 Years: Postprint

Wu Xiulan
2022-01-26 ChinaXiv: chinaxiv-202201.00116

Using daily meteorological data from 99 meteorological stations in Xinjiang from 1961–2020, the daily Meteorological Drought Composite Index (MCI) sequences for each station were calculated according to the latest revised national standard "Grades of Meteorological Drought". The spatiotemporal varia…

Spatial Error Characteristics of Numerical Model Forecasts for Heavy Rain on the Northeastern Side of the Tibetan Plateau (Postprint)

Zhang Junxia
2022-01-26 ChinaXiv: chinaxiv-202201.00117

Utilizing 24-hour precipitation forecasts at 36-hour lead time from the ECMWF (European Center for Medium-Range Weather Forecast) and GRAPES-GFS (China Meteorological Administration's GRAPES Global Numerical Prediction Operational System, Global/Regional Assimilation and Prediction System-Global For…

Spatiotemporal Characteristics of Pan Evaporation and Its Influencing Factors in the Loess Plateau Region from 1960 to 2018: Postprint

Zhang Yaozong
2022-01-26 ChinaXiv: chinaxiv-202201.00121

Evaporation constitutes a critical process in the hydrological cycle, and investigating pan evaporation in the Loess Plateau region is of paramount significance for regional water resource utilization and protection. By compiling data on pan evaporation, air temperature, wind speed, precipitation, r…

Radiosonde-Based Analysis of Spatiotemporal Distribution Characteristics of Atmospheric Dispersion Conditions in Xinjiang (Postprint)

Sun Mingjing, Li Xia
2022-01-21 ChinaXiv: chinaxiv-202201.00070

Based on data from 14 radiosonde stations in Xinjiang during 2010–2019, this study statistically analyzed the spatiotemporal distribution characteristics of maximum atmospheric mixing layer height (hereinafter referred to as mixing layer height), ventilation volume, average boundary layer wind speed…