慕士塔格冰川海拔7000m处冰芯钻孔温度  

Borehole Temperature at the Ice-core Drilling Site in the Muztag Ata Glacier, East Pamirs

作　　者：李真[1] 姚檀栋[1] 田立德[1] 徐柏青[1] 邬光剑[1] 朱国才[1] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所冰芯与寒区环境重点实验室,甘肃兰州730000

出　　处：《冰川冻土》2004年第3期284-288,共5页Journal of Glaciology and Geocryology

基　　金：国家自然科学基金优秀创新群体项目(40121001);国家自然科学基金重点项目(9012005);科技部基础研究前期研究专项(2001CCB00300)资助

摘　　要：慕士塔格冰川海拔7010m处的冰芯钻孔温度的观测结果表明,该处冰温变化曲线在夏末依然呈暖季型,其冰层的整体温度(-26.17～-25.63℃)和最低温度(-26.17℃)是目前中低纬度山地冰川中最低的,而底部冰床温度(-25.73℃)则是目前所有实测冰床温度资料中最低的.在积累区,海拔6250～7010m之间冰层温度的高度效应显著.10m深处的温度,冰层的最低温度和底部冰床温度随海拔而垂直变化的梯度分别为-0.83℃·100m-1,-0.68℃·100m-1,-0.79℃·100m-1,与气温正常的垂直变化梯度大致相当.Borehole temperatures were measured at the ice-core drilling site ((7 010) m a. s. l.) in the Muztag Ata Glacier in August 2003. The borehole-temperature profile shows a warm type at the end of summer. The ice temperature profile ((-26.17)～(-25.63) ℃) and its minimum ((-26.17) ℃) at this altitude are all the lowest among those measured in the mountain glaciers in the middle-low latitudes, and so is the temperature at the glacier bed. The temperature at the bedrock is (-25.73) ℃, demonstrating that the Muztag Ata Glacier is frozen to its bed. From the measurement, the altitude effect on the ice temperature is very clearly. From (6 250) m a. s. l. to (7 010) m a. s. l., the lapse rates of ice temperature at 10 m depth, the minimum ice temperature and the temperature at bedrock are (-0.83) ℃\5100 m^(-1), (-0.68) ℃\5100 m^(-1) and (-0.79) ℃\5100 m^(-1), respectively. These lapse rates are consistent with normal air temperature lapse rate ((-0.65) ℃\5100 m^(-1)).

关 键 词：慕士塔格 冰层温度 温度梯度 

分 类 号：P343.6[天文地球—水文科学]