Synthetic aperture radar interferometry
- P. Rosen, S. Hensley, R. Goldstein
- Mathematics, Environmental ScienceProceedings of the IEEE
- 1 March 2000
Synthetic aperture radar interferometry is an imaging technique for measuring the topography of a surface, its changes over time, and other changes in the detailed characteristic of the surface. By…
Greenland flow variability from ice-sheet-wide velocity mapping
- I. Joughin, B. Smith, I. Howat, T. Scambos, T. Moon
- Environmental ScienceJournal of Glaciology
- 1 August 2010
Abstract Using RADARSAT synthetic aperture radar data, we have mapped the flow velocity over much of the Greenland ice sheet for the winters of 2000/01 and 2005/06. These maps provide a detailed view…
A Reconciled Estimate of Ice-Sheet Mass Balance
There is good agreement between different satellite methods—especially in Greenland and West Antarctica—and that combining satellite data sets leads to greater certainty, and the mass balance of Earth’s polar ice sheets is estimated by combining the results of existing independent techniques.
Fracture Propagation to the Base of the Greenland Ice Sheet During Supraglacial Lake Drainage
The rapid (<2 hours) drainage of a large supraglacial lake down 980 meters through to the bed of the Greenland Ice Sheet initiated by water-driven fracture propagation evolving into moulin flow coincided with increased seismicity, transient acceleration, ice-sheet uplift, and horizontal displacement.
Large fluctuations in speed on Greenland's Jakobshavn Isbræ glacier
Remote sensing data is used to measure the velocity of Jakobshavn Isbræ to indicate that fast-flowing glaciers can significantly alter ice discharge at sub-decadal timescales, with at least a potential to respond rapidly to a changing climate.
Marine Ice Sheet Collapse Potentially Under Way for the Thwaites Glacier Basin, West Antarctica
Using a numerical model, the sensitivity of Thwaites Glacier to ocean melt and whether its unstable retreat is already under way is investigated, and the simulations indicate that early-stage collapse has begun.
Large-scale changes in Greenland outlet glacier dynamics triggered at the terminus.
The recent, dramatic retreat of many outlet glaciers of the Greenland ice sheet has raised concerns over Greenland’s contribution to future sea-level rise. Simulations with a numerical ice-flow model…
An automated, open-source pipeline for mass production of digital elevation models (DEMs) from very-high-resolution commercial stereo satellite imagery
Seasonal Speedup Along the Western Flank of the Greenland Ice Sheet
- I. Joughin, Sarah B. Das, Matt A. King, B. Smith, I. Howat, T. Moon
- Environmental ScienceScience
- 9 May 2008
A data set is assembled that provides a synoptic-scale view, spanning ice-sheet to outlet-glacier flow, that reveals summer speedups on the ice sheet consistent with, but somewhat larger than, earlier observations.
Rapid Changes in Ice Discharge from Greenland Outlet Glaciers
Using satellite-derived surface elevation and velocity data, major short-term variations in recent ice discharge and mass loss at two of Greenland's largest outlet glaciers are found, pointing to an alternative source of loss and the need for high-resolution observations of outlet dynamics and glacier geometry for sea-level rise predictions.