Using internal layers from the Greenland ice sheet, identified from radio-echo sounding data, with numerical models
نویسندگان
چکیده
منابع مشابه
Radio Echo Sounding of the Greenland Inland Ice
Radio echo sounding has been used for a number of years in the exploration of polar ice such as the inland ice in Greenland and Antarc tica. By means of this technique a number of important glaciological and geophysical parameters may be deter mined. Examples are ice thickness, bedrock topography and structure, stratification patterns which are used for climate and flow patterns studies, and ...
متن کاملExtraction of Ice Sheet Layers from Two Intersected Radar Echograms near Neem Ice Core in Greenland
Accumulation of snow and ice over time result in ice sheet layers. These can be remotely sensed where there is a contrast in electromagnetic properties, which reflect variations of the ice density, acidity and fabric orientation. Internal ice layers are assumed to be isochronous, deep beneath the ice surface, and parallel to the direction of ice flow. The distribution of internal layers is rela...
متن کاملHigh-Resolution Monitoring of Internal Layers Over the Greenland Ice Sheet
The global sea level rise has been attributed to the melting of mountain glaciers among other causes. The mass balance of the glacial ice plays an important role in the rise of the Earth’s sea level. A key variable in assessing the mass balance of an ice sheet is accumulation rate, which is currently determined from ice cores and pits. Accumulation data are sparse, and there are large uncertain...
متن کاملPast temperatures directly from the greenland ice sheet
A Monte Carlo inverse method has been used on the temperature profiles measured down through the Greenland Ice Core Project (GRIP) borehole, at the summit of the Greenland Ice Sheet, and the Dye 3 borehole 865 kilometers farther south. The result is a 50, 000-year-long temperature history at GRIP and a 7000-year history at Dye 3. The Last Glacial Maximum, the Climatic Optimum, the Medieval Warm...
متن کاملGreenland flow variability from ice-sheet-wide velocity mapping
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 of the ice-sheet flow, including that of the hundreds of glaciers draining the interior. The focused patterns of flow at the coast suggest a strong influence of bedrock topography. Differences between our t...
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ژورنال
عنوان ژورنال: Annals of Glaciology
سال: 2003
ISSN: 0260-3055,1727-5644
DOI: 10.3189/172756403781815438