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Lambert冰川流域是南极冰盖最大的冰流系统,因而在整个南极冰盖的物质平衡中占有非常重要的地位.近年来穿越该冰川流域的路线考察所获得的现场观测资料和浅冰芯研究结果显示,该冰川东、西两侧的积累速率分布和近期变化有明显差异:东侧积累速率较高且近几十年来呈增加趋势,西侧积累速率较低且过去几十年为明显减小.冰体运动速度测量和冰流通量计算表明,该冰川东侧运动速度较快,冰流量也较大,说明该冰川冰量补给主要来源于东侧区域.计算出的考察断面上游物质积累总量大于流出的冰通量约13％,意味着该流域目前处于物质正平衡状态,如果保持目前气候状态,冰盖将会增厚.
The Lambert Glacier Basin is the largest ice-flow system in the Antarctic ice sheet, and therefore occupies a very important position in the material balance of the Antarctic ice sheet. In recent years, the on-site observation data obtained through the route investigation of the glacier basin and the results of the shallow ice core Shows that there is a clear difference between the accumulation rate distribution and the recent changes on both east and west sides of the glacier: the accumulation rate on the east side is higher and has been increasing in recent decades, and the accumulation rate on the west side is lower and obviously decreased in the past few decades The measurement of ice body velocity and the calculation of ice flow show that the glacier has a fast moving velocity and a large ice flow, which indicates that the supply of glacial ice mass mainly comes from the eastern side of the glacier. An amount greater than about 13% of the ice flux outflows means that the basin is currently in a materially balanced state and ice sheets will thicken if the current climate is maintained.