东南极内陆格罗夫山地区冰厚及冰下地形特征

中国第30次南极科学考察队格罗夫山分队(CHINARE30, 2013-2014年)利用雪地车载深层探冰雷达在东南极格罗夫山地区开展了测线总长度超过200 km大范围、高分辨率的冰厚及冰下地形调查, 获得了哈丁山北部和萨哈罗夫岭与阵风悬崖之间详细的冰厚及冰下地形特征. 通过对雷达数据分析表明, 哈丁山北部区域平均冰厚为580 m, 最大冰厚超过1 000 m, 出现在该区域的东北方向, 而东南方向冰厚相对较小; 萨哈罗夫岭与阵风悬崖之间区域的平均冰厚为610 m, 最大冰厚超过1 100 m, 该区域槽谷发育十分成熟, 槽谷形态近似呈U型. 通过对雷达剖面影像的筛选和分析, 推测在格罗夫山地区可能存在2个液态冰下湖泊.

Ice thickness and subglacial topography in the Grove Mountains,East Antarctica

During the 30th Chinese National Antarctic Research Expedition in 2013-2014, vehicle-mounted ice radar was used to sound subglacial topography in the Grove Mountains. The result shows that the average ice thickness in the northern Mount Harding was 580 m with a maximum ice thickness of more than 1 000 m in the northeast, but the ice thickness in the northwest was relatively small. The ice thickness averaged between Zakharoff Ridge and Gale Escarpment was 610 m with a maximum ice thickness of more than 1 100 m. In this area, the valley cross-sectional morphology displayed a U-shape due to typical glacial erosion. In addition, analyzing and screening the radar cross-section diagrams indicate that there may exist two subglacial lakes in the Grove Mountains.