论文部分内容阅读
对纳尔逊冰帽３个地点浅层粒雪／冰芯的晶体组构测量表明，冰晶ｃ轴在冰帽表面具有优势方位，２０ｍ深度内普遍出现双扇形组构，在２０－３０ｍ深度具有向单极大型变化的趋势。这与所报道的中低纬度山地温冰川上的晶体组构特征有明显不同。估计大量融水渗浸和再冻结作用对冰晶组构有重要影响，但详细机制尚不清楚
The crystal structure measurements of the shallow snow / ice core in three places of Nelson ice cap show that the ice crystal c-axis has the predominant azimuth on the surface of the ice cap. Double fan-shaped structures are commonly found within 20 m depth, The trend of great change. This is clearly different from the reported crystalline structure of the mountain glaciers in the middle and lower latitudes. It is estimated that a large number of melt infiltration and re-freezing effects have an important influence on the ice crystal structure, but the detailed mechanism is not clear