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21st-Century Evolution of Greenland Outlet Glacier Velocities
Science, 2012Not So Fast Recent observations of some of Greenland's outlet glaciers have shown large and rapid increases in the speeds at which their ice has streamed to the sea. Simple projections of ice loss and sea level rise, based only on these increases, result in alarmingly high values and correspondingly great public concern. In order
Moon, T, Joughin, I, Smith, B, Howat, I
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Antarctica: Measuring Glacier Velocity from Satellite Images
Science, 1986Many Landsat images of Antarctica show distinctive flow and crevasse features in the floating part of ice streams and outlet glaciers immediately below their grounding zones. Some of the features, which move with the glacier or ice stream, remain visible over many years and thus allow time-lapse measurements of ice velocities.
B K, Lucchitta, H M, Ferguson
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Tide-induced perturbations of glacier velocities
Global and Planetary Change, 2007Abstract Recent observations showing substantial diurnal changes in velocities of glaciers flowing into the ocean, measured at locations far inland of glacier grounding lines, add fuel to the ongoing debate concerning the ability of glaciers to transmit longitudinal-stress perturbations over large distances.
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Glacier surface velocity measure based on polarimetric tracking
2012 IEEE International Geoscience and Remote Sensing Symposium, 2012The contribution of Polarimetric Synthetic Aperture Radar (PolSAR) images compared with the single-channel SAR in terms of temporal scene characterization has been found and described to add valuable information in the literature. Recently, a new PolSAR tracking algorithm has been proposed for glacier surface velocity monitoring.
Esra Erten +4 more
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The need for global glacier speed to combine measured velocity with balance velocity
2020<p>One of the outstanding glaciological research questions is how glaciers respond dynamically to climate change and how this varies regionally. Ice-velocity changes occur on an interannual scale in response to mass-balance forcing changing the glacier geometry and therefore the driving stress.
Hester Jiskoot +3 more
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Ice thickness distribution of Himalayan glaciers inferred from DInSAR-based glacier surface velocity
Environmental Monitoring and Assessment, 2022Retrieval of glacier ice thickness is extremely important for monitoring water resources and predicting glacier dynamics and changes. The inter-annual glacier ice thickness observations (more than 5 years) exploit the glacier mass changes. Ice thickness is one of the important parameters to predict the future sea-level rise.
Bala Raju Nela +2 more
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Velocity Changes of Rock Glaciers and Induced Hazards
2014Recent observations and geodetic measurements in the European Alps show that changes are occurring on rock glacier dynamics, ranging from moderate velocity variations to strong acceleration or even total collapse. These changes can be related to the ground temperature and to climate warming.
P. Schoeneich +6 more
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Glacier Velocity Estimation by Means of a Polarimetric Similarity Measure
IEEE Transactions on Geoscience and Remote Sensing, 2013The contribution of polarimetric synthetic aperture radar (PolSAR) images compared with that of single-channel SAR images in terms of temporal scene characterization has been found and described to add valuable information in the literature. However, despite a number of recent studies focusing on single-polarized glacier monitoring, the potential of ...
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The distribution of stress and velocity in glaciers and ice-sheets
Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1957Abstract A block of ice resting upon a rough slope forms a theoretical model of a glacier or an ice-sheet, the sides of the glacier valley being ignored. Previous papers have described two types of steady flow in this model: (a) laminar flow, in which the longitudinal velocity gradient r is zero, and (b) extending or compressive flow,
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Seismic Wave Velocities in the Hans Glacier, Spitsbergen
2013Direct measurements of P and S wave velocities were performed by a special seismometer array on the Hans Glacier, in the vicinity of the Polish Polar Station Hornsund, Spitsbergen. Artificial quakes were generated at a point of central location between the seismometer sites. The calculated velocities are: VP = 3,620 m/s, VS = 1,780 m/s.
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