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These parameters can be used to estimate, in the absence of more complete information, the net mass balance Copyright © 2000 John Wiley & Sons, Ltd. Hydrol. Process. 14, 1641-1666 (2000) ... Snowline detection using SAR imagery is accomplished by minimizing the topographically induced radiometric and geometric distortions inherent in SAR imagery and then delineating the wet snow, glacier ice ...
Alternatively, if the surface lithology is also known, thermal imagery can be used to locate areas of high geothermal heat flow [9, 48]. ... Therefore the term “topographic surface,” as used hence, refers to a digitized grid, consisting of a finite number of points. ...
Snow grain size was estimated using the snow grain index and compared with the asymptotic radiative transfer (ART) theory method. ... The snow cover maps were produced using Normalized Difference Snow Index (NDSI). Snow cover maps were also produced using ASTER imagery for the same area and compared with Hyperion snow cover maps. ... An attempt has been made to estimate snow grain size using Landsat-8 and ASTER imagery. The snow cover maps were also produced using NDSI method. ...doi:10.5194/isprsarchives-xl-8-499-2014 fatcat:untjki2xcbbjvgm56vwd2ryqn4
The traditional visible light/infrared remote sensing of two-dimensional glacier distribution has been extended to three-dimensional volume estimation and dynamic monitoring using radar imagery and GPS ... Digital image processing (e.g., image enhancement, spectral ratioing and automatic classification) improves the ease and accuracy of mapping these parameters. ... The accuracy of estimating ELA varies with the accuracy of the reference digital elevation information. ...doi:10.1177/030913330102500404 fatcat:opq6ew5etfhtpi6vaxa7fctxum
The traditional visible light/infrared remote sensing of two-dimensional glacier distribution has been extended to three-dimensional volume estimation and dynamic monitoring using radar imagery and GPS ... Digital image processing (e.g., image enhancement, spectral ratioing and automatic classification) improves the ease and accuracy of mapping these parameters. ... The accuracy of estimating ELA varies with the accuracy of the reference digital elevation information. ...doi:10.1191/030913301701543172 fatcat:usb5kpegnvasvewfcryoflanee
Remote Sensing - Applications
Digital elevation models in glacier mapping Debris-covered glaciers can be mapped effectively by using morphometric parameters derived from DEM and thermal bands (Ranzi et al., 2004) . ... Digital elevation models (DEM) created using SAR images are useful in measuring glacier mass balance, glacier velocity, and snow density. ...doi:10.5772/35194 fatcat:v3xfmhetrbduzhg4weglgf4e3u
The present paper highlights how QGIS, open source GIS software can be used to extract glaciers from satellite imageries. ... The high cost of the software's used to apply these technologies to geographical data did not allow expansion of its use in India except in the projects which are financed by some funding agencies. ... ESTIMATION OF ICE VOLUME IN A GLACIER There are various methods used by different scholars to estimate the ice volume of a glacier ice. ...doi:10.23956/ijermt.v6i9.98 fatcat:66ganpvv3rfsfbuhza3ek63zke
The proposed methodology for snow cover mapping uses the NDSI (estimated using planetary reflectance), NIR band reflectance and forest/vegetation cover information. ... The satellite estimated snow or non-snow pixel information using proposed methodology was validated with the snow cover information collected at three observatory locations and it was found that the algorithm ... Acknowledgements The authors are grateful to the Director, Snow & Avalanche Study Establishment (SASE) for providing facilities to carry out this study and constant motivation during the investigation. ...doi:10.1007/s12040-009-0039-0 fatcat:h7fc4ghacnbntjmg4lum2hg5hm
This paper reviews advances in the use of visible and infrared remote sensing combined with field methods for estimating glacier parameters, with emphasis on volume/area changes and glacier mass balance ... of changes in glacier parameters over large areas. ... A recent inventory for the Lahaul-Spiti region in Western Indian Himalayas was constructed using manual digitization from 2002 ASTER imagery  . ...doi:10.3390/s8053355 pmid:27879883 pmcid:PMC3675549 fatcat:goy73fi76jhnzf4bjqblralcnq
Annals of Glaciology
On 16–18 June 2008 the US National Snow and Ice Data Center held a GLIMS workshop in Boulder, CO, USA, focusing on formulating procedures and best practices for operational glacier mapping using satellite ... imagery. ... Racoviteanu's research is supported by a US National Science Foundation (NSF) doctoral dissertation improvement award (NSF DDRI award BCS 0728075) and a NASA Earth System Science Fellowship (NNX06AF66H ...doi:10.3189/172756410790595804 fatcat:52u4wzhconc45i3fxgomehvume
Recently, the use of structure-from-motion multiview stereo 3-D reconstruction (or SFM photogrammetry) to derive high-resolution digital elevation models (DEMs) has become popular for mapping snow depth ... A spatially varying snow depth precision estimate was determined using an error propagation model based on the precision of the acquired SFM DEMs, which was obtained from repeated unmanned aerial vehicle ... Bubble plots of Global Navigation Satellite System measured digital elevation model (DEM) errors and orthomosaics obtained from unmanned aerial vehicle imagery (a,b). ...doi:10.1029/2019wr025251 fatcat:bjitb7wtfngn5l4vkapiqllfhq
The extent of clean glacier ice was estimated using Normalized Difference Snow Index (NDSI) thresholds. ... Area estimations derived from Landsat imagery were compared to the glacier ground-truth data in 1975 and 2010. ... We thank the USGS for providing the Landsat imagery. ...doi:10.1016/j.jsames.2015.01.006 fatcat:2ey66sur65esbplkqgsftti3di
</strong> Differencing of digital surface models derived from structure from motion (SfM) processing of airborne imagery has been used to produce snow depth (SD) maps with between <span class="inline-formula ... aerial vehicle (UAV) systems can be adequately modelled using conventional photogrammetric theory and (ii) that SD change can be more accurately estimated by differencing snow-covered elevation surfaces ... Differencing of digital surface models derived from structure from motion (SfM) processing of airborne imagery has been used to produce snow depth (SD) maps with between ∼ 2 and ∼ 15 cm horizontal resolution ...doi:10.5194/tc-12-3535-2018 fatcat:vsitaskvt5bkljpe7yhr2qodym
-2 imagery. ... Some of the most commonly reported surface facies in the Himalayas are snow, ice, ice mixed debris, and debris. ... Hence, manual digitization was used to mask shadowed areas. ...doi:10.3390/rs11101207 fatcat:aheaiebk7nbe7hqp2cawr7tfou
Current investigation derived the change in Gangotri glacier extent along with elevation classes using multitemporal digital elevation models (DEM's) extracted from Corona 1968 and ASTER 2010 imagery. ... Precise estimate of glaciers, directly or indirectly influence most of the glaciological studies like ice extent, terminus position, mass balance studies, etc, thus mapping of snow and ice covered areas ... Outlines of Gangotri glacier and digital elevation models (DEM's) were combined, both extracted from Corona Imagery of 1968 and ASTER data of 2010, to estimate change in ice extent with respect to hypsography ...doi:10.5120/10456-5164 fatcat:vgdb7momlnbt7apfct5qwpuohm
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