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利用ICESat/GLA12激光测高数据,使用重复轨道最小二乘平面拟合的方法,计算得到东南极Totten冰川流域Totten1、Totten2和Wilkes1冰下湖在2003-2009年间的高程和水量变化。结合BEDMAP 2数据集生成的水流路径分析冰下湖间的水文联系。结果表明,3个冰下湖在该时间段内有水的持续流动,Totten1和Totten2冰下湖水流入和流出较频繁,Wilkes1冰下湖则在观测时间内水量持续增加。此外,通过分析发现,Totten2冰下湖活动存在周期性。湖水变化特征和冰下水流路径表明这3个冰下湖之间存在一定的关联性。
Using ICESat / GLA12 laser altimeter data, the plots of repeated orbits least squares fitting method were used to calculate the elevation and water volume of the Totten1, Totten2 and Wilkes1 lakes in the Totten glacier basin of East Antarctica during 2003-2009. Analysis of Hydrological Linkages between Lakes under Ice by Using Water Flow Paths Generated by BEDMAP 2 Data Set. The results showed that there were continuous flow of water in the three icy lakes during this time period. The inflow and outflow of lakes under Totten1 and Totten2 ice were more frequent. The water volume of Wilkes1 iced lake continued to increase during the observation time. In addition, it is found through analysis that the activity of Totten2 ice lake is cyclical. The changing characteristics of the lake and the path of the ice under the ice show that there is a certain correlation between the three ice lakes.