Study on the dynamics of the englacial and subglacial environment of the ice sheet in East Antarctica using ice sounding radars

我们分析了南极冰盖深层雷达探测的数据。通过对雷达资料的分析，首次研究了南极大面积区域的波传播。随后，我们研究了晶体取向组构、冰盖动力学条件、海底环境和杂质等因素的影响。主要内容如下：1.在第一个财政年度，我们利用波浪传播模式进行了数值试验; 2.将模拟结果与观测数据进行了比较; 3.对南极冰盖的内部结构进行了评估。我们特别强调以下几点。(1)I确定并分析了等时线的分布（恒定时间范围）。(2)We研究了冰盖内波浪散射机制的三维分布。(3)We 4、编制了冰雷达数据归档的计算机程序。通过对冰雷达数据的分析，我们将旧数据记录为视频图像，并将其转换为数值数据，从而更好地保存了旧数据，并详细研究了冰雷达数据在南极冰动力学研究中的应用潜力。

We analyzed data from deep radar sounding of the Antarctic ice sheet. By analysis of the radar data, we first investigated wave propagation in wide area in Antarctica. Subsequently, we studied effects from crystal orientation fabrics, dynamical condition of the ice sheet, bottom environment and impurity. Outline of the result is as follows.1.In the first fiscal year, we made numerical experiments using a wave propagation model.2.We compared the simulated results with the observational data.3.We assessed internal structure of the Antarctic ice sheet. We put special emphasis on the following points.(1)I identified and analyzed distribution of the isochrones (constant time horizon).(2)We investigated three dimensional distribution of the wave scattering mechanisms within the ice sheet.(3)We identified echo free zone within the Antarctic ice sheet.4,We made a computer program to archive old data of ice radar. Old data is recorded as video image, which we needed to digitize as numerical data.Overall, we made better archiving the old data and studied in detail potential of the ice radar data for the ice dynamics study in Antarctica.