Results 11 to 20 of about 1,380 (173)

Delineation of Glacier Drainage Basins on Western Vatnajokull [PDF]

Annals of Glaciology, 1986
Three ice-drainage basins on western Vatnajökull have been delineated with the aid of the first available, accurate ice-surface maps. These basins drain ice towards the major river systems: Tungnaá, Sylgja, and Kaldakvísl, There seems to be an important difference in the location of ice-drainage basins and melt water-drainage basins for the rivers ...
H. Björnsson
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Across-Track and Multi-Aperture InSAR for 3-D Glacier Velocity Estimation of the Siachen Glacier

Remote Sensing, 2023
Interferometric Synthetic Aperture Radar (InSAR) remote sensing generally lacks deformation sensitivity in the along-track direction. In this proposed approach, across-track observations from conventional InSAR, using both ascending and descending passes,
Vijay Kumar, Kjell Arild Høgda, Yngvar Larsen   +2 more
doaj   +2 more sources

Delineation of a complexly dipping temperate glacier bed using short-pulse radar arrays [PDF]

Journal of Glaciology, 2000
AbstractWe have defined the complex bed topography for a section of a small temperate glacier using 50 MHz monostatic short-pulse radar data and a synthetic-aperture array-processing method. The data were collected on a 100 m by 340 m array grid in the upper stem of Gulkana Glacier, central Alaska, U.S.A.
M. L. Moran, R. J. Greenfield, S. A. Arcone, A. J. Delaney   +3 more
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Glacier Area and Snow Cover Changes in the Range System Surrounding Tarim from 2000 to 2020 Using Google Earth Engine

Remote Sensing, 2021
Glacier and snow are sensitive indicators of regional climate variability. In the early 21st century, glaciers in the West Kunlun and Pamir regions showed stable or even slightly positive mass budgets, and this is anomalous in a worldwide context of ...
Jing Zhang, Li Jia, Massimo Menenti, Jie Zhou, Shaoting Ren   +4 more
doaj   +2 more sources

Comparison Study: Glacier Calving Front Delineation in Synthetic Aperture Radar Images With Deep Learning

arXiv.org
Calving front position variation of marine-terminating glaciers is an indicator of ice mass loss and a crucial parameter in numerical glacier models. Deep Learning (DL) systems can automatically extract this position from Synthetic Aperture Radar (SAR) imagery, enabling continuous, weather- and illumination-independent, large-scale monitoring.
Gourmelon, Nora, Heidler, Konrad, Loebel, Erik, Cheng, Daniel, Klink, Julian, Dong, Anda, Wu, Fei, Maul, Noah, Koch, Moritz, Dreier, Marcel, Pyles, Dakota, Seehaus, Thorsten, Braun, Matthias, Maier, Andreas, Christlein, Vincent   +14 more
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Analysing the suitability of radiometrically calibrated full-waveform lidar data for delineating Alpine rock glaciers [PDF]

ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2013
With full-waveform (FWF) lidar systems becoming increasingly available from different commercial manufacturers, the possibility for extracting physical parameters of the scanned surfaces in an area-wide sense, as addendum to their geometric ...
A. Roncat, M. Wieser, C. Briese, C. Briese, E. Bollmann, R. Sailer, C. Klug, N. Pfeifer   +7 more
doaj   +4 more sources

An enhanced index for debris-covered glacier boundary extraction, with emphasis on low-activity glaciers, using time-series SAR imagery

International Journal of Digital Earth
Accurate delineation of glacier boundaries is essential for monitoring glacier changes. Debris-covered glaciers often resemble the textures of their surrounding terrain, making boundary extraction especially challenging.
Yue Shi, Bo Zhang, Can Yang, Yongsheng Yin, Yin Fu, Jiao Wang, Qiao Liu, Xiaowen Wang   +7 more
doaj   +2 more sources

Glacier Extraction from Cloudy Satellite Images Using a Multi-Task Generative Adversarial Network Leveraging Transformer-Based Backbones

Remote Sensing
Accurate delineation of glacier extent is crucial for monitoring glacier degradation in the context of global warming. Satellite remote sensing with high spatial and temporal resolution offers an effective approach for large-scale glacier mapping ...
Yuran Cui, Kun Jia, Haishuo Wei, Guofeng Tao, Fengcheng Ji, Jie Li, Shijiao Qiao, Linlin Zhao, Zihang Jiang, Xinyi Gao, Linyan Gan, Qiao Wang   +11 more
doaj   +2 more sources

Delineation of debris-covered glaciers with multi-temporal UAV images (Gössnitzkees, Schober Group/Austria)

Advances in Geodesy and Geoinformation
The relative share of debris-covered glaciers strongly increased in recent decades due to climate change and amplified rock production, but despite their relevance as climate indicators, accurate demarcation of respective glaciers is challenging. Remote sensing is an important tool for glacier mapping, but most existing studies apply medium resolution ...
Harald Zandler, Wolfgang Sulzer, Viktor Kaufmann   +2 more
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Automated Delineation of Supraglacial Debris Cover Using Deep Learning and Multisource Remote Sensing Data

Remote Sensing, 2022
High-mountain glaciers can be covered with varying degrees of debris. Debris over glaciers (supraglacial debris) significantly alter glacier melt, velocity, ice geometry, and, thus, the overall response of glaciers towards climate change. The accumulated
Saurabh Kaushik, Tejpal Singh, Anshuman Bhardwaj, Pawan K. Joshi, Andreas J. Dietz   +4 more
doaj   +2 more sources