南极洲乔治王岛柯林斯冰帽的温度分布

钻孔内温度实测表明，柯林斯冰帽积累区大部分呈温性，消融区可能呈冷性。冰帽活动层温度明显受气温季节变化的影响，降水暖渗浸对冰的增温作用显著，雪盖对温度分布也显示了一定的影响。测量显示，冰帽纵深层的温度大都接近融点，而小冰穹顶附近十数米范围内温度变化较大。小冰穹顶附近，钻进时３０ｍ以下孔中出水现象显著，可能是冰内径流、差异运动和较高盐度等因素共同作用的结果。

TEMPERATURE DISTRIBUTION IN COLLINS ICE CAP, KINGGEORGE ISLAND, ANTARCTICA

The temperature measurement in boreholes shows that the Collins Ice Cap has characteristics of temperate glacier in most parts of the accumulation area, but it is characterized by cold glacier in ablation area. The ice temperature of the active layer is noticeably affected by seasonal variations of air temperature. The water infiltrating and warming is very strong. The snow cover also casts some influence on temperature distribution. The observed data have revealed that the ice temperature in deep layers is at the freezing points,but the temperature varies greatly in the vicinity(10-20m) of the Little Dome.Water seeping is very significant at the depth of 30m in someboreholes while drilling in the vicinity of the Little Dome. This can be explained by internal runoff, different ice movement, etc.