摘要
纳尔逊冰帽是南设得兰群岛的一个小冰帽，受海洋性气候影响冰帽上降水丰富，冰温较高。冰帽表面运动速度完全由冰帽表面形态和冰帽底床形态所控制，其中Ｅ剖面更为复杂。冰帽驱动应力基本小于１００ｋＰａ。由Ｖ／Ｚ～Ｚａ曲线得到在Ｖ／７为０．６～３×１０￣（－９）范围内的流动参数：ｎ约为１；Ｂ≈４．３×１０￣（１０）ｄｙｎｅｓｃｍ￣（－２）ｓｅｃ。这表明在低应力区，冰体流动更接近牛顿流体。
The Nelson Ice Cap is a small ice cap in the South Shertland Island in the Antarctica.The precipitation is abundant and the ice temperature is high due to the influence of sub-Antarctic maritime climate.The surface velocity of the, Nelson Ice Cap is mainly controlled by its surface and bedrock topography. Along the transection E the velocity distribution is more complicated.The driving stress is basically below 100 kPa.From V/Z～Za curve with V/Z value ranging in 0.6～3×10￣(-9), we have obtained that the flow parameters n approrimately equals 1 and B≈4. 3× 10￣(10)dynes cm￣(-2)sec. We assume that the glacier ice is a Newton fluid in the low stress region.
出处
《地理研究》
CSSCI
CSCD
北大核心
1995年第1期1-7,共7页
Geographical Research
基金
国家自然科学基金
国家南极考察委员会和中国科学院兰州冰川冻土研究所冰芯实验室资助
关键词
纳尔逊冰帽
牛顿流体
冰帽
动力学
南极洲
Nelson ice cap The surface velocity, Newton fluid, The flow-law parameter
