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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...
GeoGateway is a web-enabled map-based system for analysis, modeling, and response of geodetic imaging products for studying earthquakes and crustal deformation. The system provides a data product search and analysis gateway for scientific discovery, field use, and disaster response. To be effective users require data overlay and visualization, interactive analysis features, and data product download...
Evapotranspiration (ET) is the combination process of the surface evaporation and plant transpiration which occur simultaneously, and it links the terrestrial water cycles, carbon cycles and energy exchange. In this study, based on the observations from 242 global FLUXnet sites, with daily average temperature, relative humidity, wind speed, incident solar radiation, NDVI and observed ET as input data,...
The Soil Moisture Active Passive (SMAP) mission, launched January 31, 2015, provides global observations of 1.4 GHz Earth thermal emissions from space [1] through its L-band radiometer. Although SMAP's radiometer passband lies within the protected 1.4–1.427 GHz band, both unauthorized in-band transmitters as well as out-of-band emissions from transmitters operating at frequencies adjacent to this...
Surface soil moisture was retrieved globally by systematically correcting for the effects of vegetation and soil surface roughness. The retrieval is enabled by employing physical-models of radar forward scattering for individual vegetation types to account for vegetation scattering and absorption, and by constraining the surface roughness effect using time-series observations. The L-band SMAP multi-polarized...
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...
As Mare Orientale is the youngest and best preserved multiring impact basin on the Moon, it is of essential importance to study its composition and structure for current Moon research. In this paper, the CELMS data from Chang'E-2 satellite are employed to reveal the microwave thermal emission features of the Mare Orientale. The results indicate that the regions with high TB and high TB difference...
Imagine a world where geoscientists are empowered through easy web access to seamless, scalable, three-dimensional (3D) mineralogy of the Earth and solving challenges such as understanding the nature of any regolith cover or recognizing the distal footprints to hidden economic mineral systems. An easy first step in building such a global 3D mineral map could begin with a suite of “multi-spectral”...
Digital shorelines obtained from old maps and photographs as well as more recent GPS surveys are used to study the developments in coastal geomorphic processes in relation to variations in climatic and oceanographic forcing factors in the Baltic Sea area. By the end of the 20th century, the postglacial isostatic land uplift is nearly balanced out by the sea level rise and storminess-related shore...
Identification of high potential risk and susceptible zones for natural hazards of geological origin is one of the most important applications of advanced remote sensing technology in tropical environments. Yearly, several landslides occur during heavy monsoon rainfall in Kelantan river basin, Peninsular Malaysia, which are obviously connected to geological structures and topographical features of...
With rapid development of remote sensing technique, alteration anomaly information extraction on the earth's surface by remote sensing image is considered a fast and effective method to exploration. In this paper, firstly the geological background and data of study area are introduced. Secondly, based on the hydrocarbon micro-seepage theory the alteration information such as altered mineral, soil...
Hyperspectral rare earth elements detection in space borne and near-field acquired images becomes more and more important for global exploration. In comparison to classic exploration methods, the benefit of hyperspectral surveys is the fast and in-situ generation of spatial information. Current hyperspectral investigations do more and more include rare earth element mappings - one new tool for hyperspectral...
Multi-aspect PolSAR data contains polarimetric properties from different look angle. Multi-aspect polarimetric information can be applied in geometric measurement, target identifying, precise classification. In order to characterize anisotropic target, anisotropic and isotropic scattering need to be separated from the raw data. A detecting-removing-incoherent-adding (DRIA) framework, presented in...
The Shuttle Radar Topography Mission (SRTM) C-band is an important elevation data at regional scale. The 1″ SRTM elevation data has been released in 2014 over China. A detailed evaluation of 1″ SRTM data in China is still lacking. In this paper, the 1″ SRTM data quality is assessed by comparing with the 25m DEM data based on 1∶50000 scale topographic maps taking loess hilly area in China as an example...
Proper determination of light use efficiency (LUE) is a prerequisite for LUE models to simulate gross primary productivity (GPP). This study was devoted to apply the photochemical reflectance index (PRI) to accurately track LUE variations for a sub-tropical coniferous forest using tower-based PRI and GPP measurements. To improve the ability of PRI to track LUE, a simple two-leaf approach is used to...
An appropriate resolution of the Digital Elevation Model (DEM) data with sufficient quality of the gradient field is critical for effective correction of remotely sensed data over mountainous areas. Conversely, using performance of terrain illumination correction and scale-based analysis, such as filter bank analysis, the quality of DEM data can be evaluated. In this study, TanDEM-X Intermediate DEM...
RADARSAT-2 SAR data were used to develop a monitoring program for Canadian forest lands with the aim to provide information on forest cutblocks and to develop algorithms for the detection of forest disturbances. Three study sites were selected in Canada and were representative of different forest types and terrain. Due to large data volumes and the need for efficiency, an automated end-to-end solution...
The hyperspectral image has the advantages of wide spectral range and the high spectral resolution, and is widely applied in the terrain classification. In this paper, we study the airborne hyperspectral image classification methods using the airborne hyperspectral image. Considering the hyperspectral image has amounts of bands and there is redundancy among the bands, the principle component analysis...
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...
Hyperspectral remote sensing data have great potential to identify ground objects and classify tree species. However, the tree species classification based on hyperspectral data in the subtropical region of hilly landscape have always been challenged by rugged topography. We conducted our research in subtropical mountainous forests in Pu'er of Yunnan province in southwestern China. This research investigated...
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