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The Lena River basin in Siberia produces one of the largest river inflows into the Arctic Ocean. One of the most important sources of runoff to the river is spring snowmelt, and therefore, snow ablation processes have great importance for this basin. Vegetation and accumulated snowfall control the spatial distribution of sublimation, which is found to have a considerable effect on the snow ablation...
Soil moisture is one of the important variables in hydrological systems. Spatial and temporal dynamics of soil moisture are important for determining complex environmental process. The aim of the study is to assess the trend of soil moisture in India and to monitor agricultural drought in Medak district of Telangana state during the period 2002 to 2014. Spatio-temporal analysis has been performed...
Increasing greening has been occurring for land use and land cover of fast urbanization areas is surprising. This paper introduce a new method for greening trend analyzing based on the results of a newly developed algorithm called CCDC (Continuous Change Detection and Classification). This method is capable of separating change caused by abrupt and gradual changes, and providing information on the...
Groundwater is an important component of the hydrological cycle. In Canada, more than 30% of the population relies on groundwater as the main source of water for domestic use. However, its measurement and monitoring remain challenging at large spatial scales. In this study, we examined the relationship between in situ groundwater data extracted from existing wells, and those derived from the Gravity...
The Xinjiang Uygur Autonomous Region (XUAR), as the largest autonomous region in China, experienced an unprecedented combination of economic reforms, exploration of natural resources, and population growth in last three decades. Using the 8 day composite 500m resolution MODIS reflectance data, we examined interannual variation of vegetation greenness and water body surface area in this area from 2000...
Here we presented a high-resolution 5350-year pollen record from a maar annually laminated lake in East Asia (EA). Pollen record reflected the dynamics of vertical vegetation zones and temperature change. Spectral analysis on pollen percentages/concentrations of Pinus and Quercus, and a temperature proxy, revealed ∼500-year quasi-periodic cold-warm fluctuations during the past 5350 years. This ∼500-year...
Drought is widely distributed in the world, resulting in the shortage of water resources, decreasing groundwater storage, reducing yields of crops, and sustained severe drought even cause serious social and economic problems that affect people's life. Based on the drought monitoring theory and remote sensing data, the drought assessment in Beijing-Tianjin-Hebei(JJJ) region from 2005 to 2014 have been...
This paper was intend to reveal the changes and grasp the trend of vegetation coverage in Shijiazhuang from 1995 to 2015. Firstly, dimidiate pixel model was used to calculate 6 periods of fractional vegetation coverage in Shijiazhuang based on Landsat TM/OLI data of 1995, 2001, 2007, 2009, 2012 and 2015, then CV model and Slope model were used to analysis spatial change characteristics and the trend,...
Intensive transformation of landscape has taken place in Weihai, Shandong province. This gave us the idea to investigate the urban development in this area by the use of archived satellite data, available for the last 30 years. We utilized advanced processing schemes to geometrically correct and spectrally calibrate about 60 cloud free frames of Landsat data available from 1984 to 2015. We used different...
Groundwater level has been declined continuously due to overexploitation and mismanagement of water resources, which leads severe problem in arid and semi-arid regions of the world. Geostatistics and Geographical information system (GIS) are the efficient technology to manage the groundwater resources. In the present study Linear regression method and Mann Kendall's test are used with GIS technology...
Taiyuan Basin is one of the regions with complex geological structure and frequent seismic activities in China. Because of groundwater exploitation and tectonic activity, land subsidence has occurred widely in this region. For disaster prevention and mitigation, obtaining ground deformation characteristics within the basin is an urgent requirement. The Interferometric Synthetic Aperture Radar (InSAR)...
Northeast China, one of the most important grain producing regions in China, is vulnerable to drought. Timely, accurate and effective drought monitoring in the region is very essential to secure its output grain production. In this paper, the temporal and spatial distribution of drought in Northeast China was analyzed based on the TVDI. Also the drought change trend from 2001–2013 in Northeast China...
In this study, we present a detailed inter-annual analysis of four remotely sensed leaf area index (LAI) products: GLASS, GLOBALBNU, GLOBMAP, and MODIS LAI, and conduct correlation analysis between LAI and three meteorological variables over China. The results manifest that the four products agree well in most of northern regions of China, with higher correlation coefficient and the same response...
Land degradation is one of most serious socio-ecological problems in Northeast Asia dryland regions (NADR), which requires reliable assessments on degree and extent of land degradation. This paper aims (1) to assess the applicability of Rainfall Use Efficiency (RUE) and Precipitation Marginal Response (PMR) in monitoring land degradation in NADR, and (2) to analyze natural factors for land degradation...
With the Geographic Information System (GIS) analytical tools and Remote Sensing technology, the main territory's Net Primary Productivity (NPP) in China from 2001 to 2010 is estimated based on CASA model. The analysis of the temporal and spatial variations in NPP shown that NPP in the southern regions shows increase trend after the first five years' decrease, in addition, the southern region of China...
Water vapor in the Earth's upper atmosphere plays a crucial in the radiative balance, hydrological process, and climate change. Based on the latest MODIS data, this study probes the spatio-temporal variations of global water vapor content in the past decade. It is found that overall the global water vapor concentrations declined over 2003–2012 (b=− 0.0149, R2=0.797, p=0.0005). The decreasing trend...
Plant functional traits can be used to study the interactions between plants and ecosystem functioning as well as the response of plants to various environmental pressures. Continuous monitoring of plant functional traits dynamics on a large spatial scale is important to understand the mechanisms of ecosystem function degradation, especially on the Qinghai-Tibet Plateau. In this study, we investigated...
Aerosol trends is an important factor in climate changes. Visibility is considered as an alternative information to investigate the long-term aerosol loadings. However, few studies analyzed the representativeness of visibility on AOT. In this paper, surface visibility, MODerate-resolution Imaging Spectroradiometer (MODIS) and Multi-angle Imaging SpectroRadiometer (MISR) monthly AOT products between...
The population growth rate in the Gulf of Mexico region is the highest in the United States. This area faces many natural hazards; sea level is rising, and as a result this region is experiencing coastal erosion, in some areas as much as 300 meters inland. Subsidence in conjunction with rapidly rising regional sea levels poses significant risks to coastal communities located within these regions now...
Recently, CSR, GFZ and JPL have launched GRACE RL05 data with advantages in the spatial resolution and precision. This study explores the capability of GRACE to detect the Terrestrial Water Storage (TWS) variations in Jing-Jin-Ji Region. In this paper, we make GRACE RL05 data spatial filtering, compute and analyze TWS variations time-series and spatial trend distribution. Results show TWS in Jing-Jin-Ji...
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