Recovery Lakes, East Antarctica: Radar assessment of sub‐glacial water extent
Recovery Lakes, East Antarctica: Radar assessment of sub‐glacial water extent
复制标题
东南极洲恢复湖泊：冰下水范围的雷达评估
DOI：
10.1029/2010gl046094
复制
发表时间：
2011
影响因子：
5.2
通讯作者：
M. Albert
中科院分区：
文献类型：
--
作者：
K. Langley;J. Kohler;K. Matsuoka;A. Sinisalo;T. Scambos;T. Neumann;A. Muto;J. Winther;M. Albert
恢复冰流的一条快速流动的支流深入东南极洲内陆 500 多公里。最近的卫星研究发现，该支流起始区域的表面特征表明存在一个重要的冰下水力系统，包括四个大型光滑盆地（大型冰下湖泊的典型表面表现），以及十一个较小的区域，冰盖表面高程因冰下水的排放/填充而迅速变化。在这里，我们提出了该地区冰下条件的第一个透冰雷达证据。我们仅在所研究的大型光滑盆地边界内的有限区域内发现了明显的冰水界面，之前假设这些盆地是充满水的湖泊。某些地区的雷达特征类似于干涸的湖泊，表明部分河床是潮湿的，但不是典型的湖泊。我们还发现了湖泊边界之外离散水体的证据。一系列证据表明，最北端的两个恢复湖最近已经排干。
A fast‐flowing tributary of Recovery ice stream penetrates more than 500 km into the interior of East Antarctica. Recent satellite‐based studies found surface features in the onset area of this tributary that indicate a significant subglacial hydraulic system, including four large smooth basins, the typical surface expression of large subglacial lakes, as well as eleven smaller areas over which ice‐sheet surface elevations rapidly changed by discharge/filling of subglacial water. Here we present the first ice‐penetrating radar evidence of subglacial conditions in this area. We identified a distinct ice‐water interface only over a limited area within the boundaries of the investigated large smooth basins, previously hypothesized to be water‐filled lakes. The radar characteristics in some areas are similar to those of a drained lake, indicating that parts of the bed are wet, but not a typical lake. We also find evidence for discrete water bodies outside of the lake boundaries. The lines of evidence indicate that the northern most two Recovery Lakes have recently drained.
影响因子：
5.3
作者：
I. Filina;D. Blankenship;M. Thoma;V. Lukin;V. N. Masolov;Mrinal K. Sen
通讯作者：
I. Filina;D. Blankenship;M. Thoma;V. Lukin;V. N. Masolov;Mrinal K. Sen