Mass balance and changes of surface slope, crevasse and flow pattern of Erikbreen, northern Spitsbergen: an application of a geographical information system (GIS)
Mass balance and changes of surface slope, crevasse and flow pattern of Erikbreen, northern Spitsbergen: an application of a geographical information system (GIS)
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斯匹次卑尔根岛北部埃里克布林的质量平衡和表面坡度、裂缝和流动模式的变化：地理信息系统（GIS）的应用
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
J. L. Sollid
中科院分区：
文献类型：
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作者：
B. Etzelmüller;G. Vatne;R. Degard;J. L. Sollid
1970年和1990年利用数字摄影测量和数字高程模型(DEM)技术对斯皮茨卑尔根北部的埃里克布赖恩冰川(79°40 N 12°30 E)进行了研究。海底地形是由无线电回波测深得出的。在DEM的基础上，计算了物质平衡和地表坡度、裂缝和流态的变化，并计算了内部冰的变形速度。总质量平衡的计算表明，埃里克布莱恩在过去的20年里一直没有处于平衡状态。1970~1990年平均地表下降0.38m/a，体积减少5%~6%，平均减少3.5×10~(-1)水。冰川表面在整个冰川地区下沉，但在堆积区有北向坡度的少数地区除外。然而，除了低于100Ma.s.l的区域外，地表坡度和裂缝模式在20年期间没有显著变化。
The polythcrmal valley glacier Erikbreen (79°40?N 12°30?E), northern Spitsbergen, was investigated in 1970 and 1990 using digital photogrammetry and digital elevation model (DEM) techniques. The bottom topography was derived from radio-echo soundings. Based on the DEM, mass balance and changes of surface slope, crevasse and flow pattern were evaluated, and internal ice deformation velocities were calculated. Calculations of the total mass balance show that Erikbreen has not been in equilibrium for the last 20 years. The average surface lowering was 0.38 m/a and the volume had decreased by 5% to 6% from 1970 to 1990 or on the average by 3.5 × 10?1 water. The glacier surface subsided over the whole glacier area except in minor areas with northfacing slopes in the accumulation area. The surface slope and the crevasse pattern, however, did not change significantly during the 20-year-period, except in areas below 100 ma.s.l.