Velocity Patterns and Elevations On Ice Stream B
نویسندگان
چکیده
منابع مشابه
Satellite-image-derived velocity field of an antarctic ice stream.
The surface velocity of a rapidly moving ice stream has been determined to high accuracy and spatial density with the use of sequential satellite imagery. Variations of ice velocity are spatially related to surface undulations, and transverse velocity variations of up to 30 percent occur. Such large variations negate the concept of plug flow and call into question earlier mass-balance calculati...
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[1] Here we use Ice, Cloud and land Elevation Satellite (ICESat)-derived elevations and surface characteristics to investigate the Malaspina Glacier of southern Alaska. Although there is significant elevation variability between ICESat tracks on this glacier, we were able to discern general patterns in surface elevation change by using a regional digital elevation model (DEM) as a reference sur...
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To ascertain whether the , ·elocity of Ice Stream B, \\'est Antarctica, may be controlled by the stres e in its marginal shear zones \ the .. Snake" and the .. Dragon'· ), we undertook a determination of the marginal hear stress in the Dragon near Camp up B by using ice itself as a stress meter. The ob erved marginal shear strain rate of0.14 a I is used to calculate the marginal shear stress fr...
متن کاملShallow ice stream approximation
Introduction Conclusions References Tables Figures ◭ ◮ ◭ ◮ Back Close Full Screen / Esc Abstract Introduction Conclusions References Tables Figures ◭ ◮ ◭ ◮ Back Close Full Screen / Esc Printer-friendly Version Interactive Discussion EGU Abstract New analytical solutions describing the effects of small-amplitude perturbations in boundary data on flow in the shallow ice stream approximation are p...
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Star patterns, reminiscent of a wide range of diffusively controlled growth forms from snowflakes to Saffman-Taylor fingers, are ubiquitous features of ice-covered lakes. Despite the commonality and beauty of these "lake stars," the underlying physical processes that produce them have not been explained in a coherent theoretical framework. Here we describe a simple mathematical model that captu...
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ژورنال
عنوان ژورنال: Annals of Glaciology
سال: 1990
ISSN: 0260-3055,1727-5644
DOI: 10.1017/s0260305500009058