Most papers are machine-translated to English; some are originally in English.
Showing 50 of 516 papers in Earth & Space
Planetary surfaces, shaped by billions of years of geologic evolution, display numerous impact craters whose distribution of size, density, and spatial arrangement reveals the celestial body's history. Identifying these craters is essential for planetary science and is currently mainly achieved with…
This paper presents a comprehensive analysis of the photometric system of the University of Chinese Academy of Sciences 70 cm Telescope located at the Yan-qi Lake campus of the University of Chinese Academy of Sciences. We evaluated the linearity, bias stability, and dark current of the camera. Util…
To address the installation challenges of a 2-m ring Gregorian telescope system and similar optical systems with a small width-to-radius ratio, we propose a detection method combining local interferometry with a comparison model. This method enhances the precision of system calibration by establishi…
The Solar Close Observations and Proximity Experiments (SCOPE) mission will send a spacecraft into the solar atmosphere at a low altitude of just 5 R☉ from the solar center. It aims to elucidate the mechanisms behind solar eruptions and coronal heating, and to directly measure the coronal magnetic f…
Exploiting remote sensing data is a promising approach to estimate surface solar irradiance (SSI). In this study, we propose a method to estimate global SSI using a lookup table and Landsat data. Despite the low temporal resolution of the data used, the developed method produces SSI maps with adequa…
We present analog clocks fitted to the Mars solar day. These clocks use the standard Earth-based second of the International System of Units (SI) as their operational unit of time, unlike current practice for Mars timekeeping. We discuss the importance of preserving the SI second. On this basis, we …
Land use and cover change (LUCC) is the most direct manifestation of the interaction between anthropological activities and the natural environment on Earth's surface, with significant impacts on the environment and social economy. Rapid economic development and climate change have resulted in signi…
Severe soil erosion and drought are the two main factors affecting the ecological security of the Loess Plateau, China. Investigating the influence of drought on soil conservation service is of great importance to regional environmental protection and sustainable development. However, there is littl…
Globular clusters harbor numerous millisecond pulsars; however, the detection of long-period pulsars within these clusters has been notably scarce. The search for long-period pulsars encounters significant challenges due to pronounced red noise interference, necessitating the crucial step of red noi…
Abstract: Glaciers are highly sensitive to climate change and are undergoing significant variations in mid-latitude regions. This study analyzed the spatiotemporal changes of typical glaciers and their responses to climate change during 1990–2015 across four distinct mountainous sub-regions in the X…
To improve the pointing and tracking accuracy at the Coude focus of alt-azimuth solar telescopes, this paper first simulates the tracking errors introduced at the Coude focus due to misalignment among the principal optical axis, azimuth axis, altitude axis, and derotator axis in the Coude optical pa…
Phased array feed is a receiver technology that places an array antenna at the focal plane field of a radio telescope to achieve higher gain and more flexible beam control. Given that, like array antennas, it is composed of multiple antenna elements arranged in a certain configuration, electromagnet…
Abstract: Glaciers are known as natural ''solid reservoirs'', and they play a dual role between the composition of water resources and the river runoff regulation in arid and semi-arid areas of China. In this study, we used in situ observation data from Urumqi Glacier No. 1, Xinjiang Uygur Autonomou…
Abstract: With realizing the importance of ecosystem services to society, the efforts to evaluate the ecosystem services have increased. As the largest tributary of the Yellow River, the Weihe River has been endowed with many ecological service functions. Among which, water yield can be a measure of…
Abstract: Aeolian sandy soil in mining areas is characterized by intense evaporation and poor water retention capacity. This study was designed to identify a suitable biochar application method to improve soil water infiltration and minimize soil water evaporation for aeolian sandy soil. Using an in…
We report the discovery of a massive protostar M17~MIR embedded in a hot molecular core in M17. The multiwavelength data obtained during 1993--2019 show significant mid-IR (MIR) variations, which can be split into three stages: the decreasing phase during 1993.03--mid-2004, the quiescent phase from …
Based on data from the fifth and sixth national population censuses, and employing regional human resource measurement methods, multiple linear regression, and geographic detector research methods, this study analyzes the spatiotemporal distribution differences and influencing factors of human resou…
The victory of the poverty alleviation campaign has shifted the focus of poverty governance toward alleviating relative poverty. The overlap between the population that has been lifted out of poverty and the relatively poor population determines that contiguous destitute areas will remain the main b…
Based on panel data of the tourism economic system and ecological environment system for 66 central cities (municipalities, prefectures, autonomous prefectures, and leagues) in the Yellow River Basin, and employing methods such as the coupling coordination model, spatial autocorrelation analysis, an…
Ecological migration is one of the effective approaches for rural revitalization in western China and regional ecological protection and restoration. Investigating the spatial migration characteristics and ecological impacts of ecological migration contributes to regional poverty alleviation and eco…
Villages are the units that most directly reflect the laws of rural socio-economic activities, and functional type classification at the village level is key to advancing classified rural revitalization. Taking administrative villages as the basic unit, this study employs the entropy weight method, …
To investigate the degree of spatial mismatch between tourism economic development and ecological environment systems and quantitatively analyze their spatial mismatch relationship, this study takes Ningxia as the research object, and based on spatial mismatch theory and models, comprehensively empl…
Through CiteSpace analysis of 2,703 articles on arid area urbanization research from CNKI (China National Knowledge Infrastructure) spanning 1984–2020, this study examines publication trends, stage division, core author and institutional networks, thematic evolution, and historical hotspots utilizin…
In the context of global warming, the increased frequency and intensity of drought events have led to significant changes in vegetation diversity in terrestrial ecosystems. Studying the response of vegetation phenology to seasonal drought is of great importance for the conservation of ecosystems on …
The Lijiang 2.4-meter telescope, as the largest-aperture general-purpose optical telescope currently in China, plays a very important role in nighttime astronomical observations in China. According to the overall observation time allocation in recent years, spectroscopic observations with the Yunnan…
A detailed analysis of RFI mitigation strategies employed by radio observatories both domestically and internationally is presented, specifically addressing the problem of radio frequency interference (RFI) in radio astronomy observations. Based on the RFI issues encountered during actual observatio…
This paper addresses the deficiencies in detection methods for the electromagnetic quiet zone surrounding radio astronomy observations and proposes a radio interference monitoring method based on a four-antenna linear array, aiming to real-time monitor the presence of interference sources in the ele…
Based on MOD17A3HGF NPP (Net Primary Productivity) data along with temperature, precipitation, and other datasets, this study employed trend analysis and partial correlation analysis to investigate the spatiotemporal dynamics of natural grassland NPP in Xinjiang from 2000 to 2018 and its response to…
Heat wave disaster risk information serves as an important reference for the prevention and control of extreme disaster events under conditions of global climate warming and rapid urbanization. To address the problem of incomplete assessment of heat wave hazard factors, based on multi-source satelli…
Using ICESat-1 and CryoSat-2 altimetry data along with in-situ hydrological station measurements, this study analyzed the water level variation characteristics of Lake Balkhash from 1970 to 2020. Combined with MOD09A1 data and related materials, the long-term time series changes in lake area and wat…
Taking the rain-fed farming areas in northern Kazakhstan as the study target area, based on spring wheat yield statistical data and remote sensing spectral indices, we conducted analysis on the optimal prediction period for spring wheat yield estimation and vegetation indices. Using regression analy…
Vegetation is one of the sensitive factors reflecting changes in terrestrial ecosystems and plays a crucial role in maintaining and regulating ecosystem stability. Taking the Ebinur Lake Basin, an ecologically fragile region, as the study area, and using the Geodetector model, this study investigate…
To investigate the correlation among land surface temperature (LST), normalized difference vegetation index (NDVI), and atmospheric water vapor content in desert and oasis areas of different regions in Xinjiang, this study utilized MOD13C3 vegetation index data, MOD11C3 land surface temperature data…
Taking Gaochang District of Turpan City as an example, this study utilizes four periods of remote sensing imagery from 1990, 2000, 2010, and 2018 to interpret and obtain land use change data for the study area. Based on a grid scale and comprehensively employing methods such as land use transition m…
Lake sediments in the northwestern Tibetan Plateau preserve rich records of regional climatic and environmental changes, which is of significant importance for revealing variations in the Tibetan Plateau's westerly-monsoon circulation system and their interaction processes. By analyzing environmenta…
Farmland resources are the fundamental guarantee of national food security, and mastering the quantity and quality status of farmland is the prerequisite for rational utilization of regional farmland resources. Taking Hancheng City, located in the eastern part of the Weibei Dry Plateau in Shaanxi Pr…
The Yellow River Basin is an important energy security support zone in China and a key region for safeguarding national ecological security. Coordinated development of coal resource development and ecological protection holds important practical significance for coordinating basin-wide energy securi…
National Forest Parks constitute one of the important carriers of ecological civilization construction in China. This study investigates National Forest Parks in 1994, 2004, and 2019, comprehensively employing spatial analysis techniques to systematically investigate their spatial distribution patte…
Using daily precipitation data from five national meteorological stations in Urumqi during the snowfall period from 1961–2019, together with NCEP daily four-times 0.25°×0.25° and 1°×1° reanalysis data, this study statistically analyzes the characteristics of snowstorms and large-scale circulation pa…
Based on daily meteorological data from 62 weather stations in Xinjiang Uygur Autonomous Region from 1969 to 2019, this study investigates the effects of meteorological factor variations on wind erosion climate erosivity; utilizes Geographically Weighted Regression models and centroid migration mode…
Ecological water conveyance scheduling is one of the most effective measures for ecological protection and restoration. Implementing ecological water conveyance holds significant importance for restoring natural ecosystems in arid and semi-arid regions and maintaining the health of oasis ecosystems.…
The regionalization problem involves partitioning a specific geographic region into several spatially contiguous zones to satisfy the fundamental principle of minimizing intra-zone differences while maximizing inter-zone differences, and finds wide applications in geography, environmental science, e…
Geomorphological objects often exhibit significant size disparities, spanning specific spatial scales. Existing automatic classification methods for geomorphological forms have not adequately accounted for this characteristic, thereby constraining classification accuracy. By employing the size of ge…
Soil moisture, as a critical factor of the ecological environment, serves as an important indicator for soil monitoring and ecological environmental change. Based on MOD11A2 LST and MOD13A2 NDVI data, this study analyzes the spatiotemporal distribution characteristics of soil moisture and its influe…
Using a space-for-time substitution approach, we investigated and analyzed soil moisture dynamics and vegetation succession characteristics across abandoned croplands of varying abandonment ages (1, 2, 4, 8, 13, 20, 30, 40 years and CK) in the Qingtu Lake area of Minqin. The results indicated that: …
This study obtained a vegetation NPP dataset for the Loess Plateau from 2000–2018 using the CASA model and quantitatively analyzed the impacts of climate change and human activities on vegetation NPP variation through correlation and residual analysis methods. The results indicate: (1) Vegetation NP…
The oasis-desert ecotone is an ecological buffer zone between oasis and desert ecosystems, playing a crucial ecological role in maintaining oasis stability and preventing wind erosion. Taking the Cele Oasis-Desert Ecotone as an example, this study selected Landsat remote sensing imagery data, meteor…
Through field experiments and evaporation barrel simulation experiments, the effects of different short-term straw return methods on soil structure and water evaporation were analyzed. Four treatments were established: control (CK), chopped straw return (T1), chopped straw return + whole straw mulch…
Nitrous oxide (N2O) is one of the important greenhouse gases in the atmosphere and has attracted considerable attention in the context of global climate warming, with farmland soil being its primary emission source. Among the numerous factors affecting N2O emissions from farmland, tillage practices …
The movement and variation characteristics of soil water and salt during freeze-thaw processes in the non-irrigation season directly affect spring crop irrigation decisions. This study conducted field sampling and monitoring of six cotton field plots with different drip irrigation years in the Xinji…
