西南极洲冰流的附属物由RADARSAT干涉测量揭示出来
1Jet Propulsion Laboratory, California Institute of Technology, M/S 300-235, 4800 Oak Grove Drive, Pasadena, CA 91109, USA. Canada Centre for Remote Sensing, Applications Division, 588 Booth Street, Ottawa, Ontario K1A 0Y7, Canada. Code 971, Oceans and Ice Branch, NASA/Goddard Space Flight Center, Greenbelt, MD 20771, USA. SAIC General Sciences Corporation, 4600 Powder Mill Road, Beltsville, MD 20705-2675, USA. Institute for Geophysics, University of Texas at Austin, 4412 Spicewood Springs Road 600, Austin, TX 78759, USA.
Science (New York, N.Y.)
|October 9, 1999
概括
干涉测量雷达数据揭示了西南极洲的冰流如何连接到内陆的支流. 一些养停滞不前的冰流C的支流正在导致冰的快速加厚,这是一个重要的南极发现.
科学领域:
- 冰川学的冰川学
- 遥感 遥感 遥感 遥感
- 南极科学科学 南极科学
背景情况:
- 西南极洲的冰流对海平面上升至关重要.
- 了解源区域的冰动态是预测未来冰损失的关键.
- 亚冰川地形影响着冰流.
研究的目的:
- 在四个西南极冰流的源区域绘制冰的运动图.
- 为了研究从缓慢的内陆流向快速的冰河流的过渡.
- 为了分析停滞地区的冰厚化.
主要方法:
- 使用了干扰计RADARSAT数据.使用了干扰计RADARSAT数据.
- 使用卫星雷达干扰测量绘制冰的运动图.
- 分析了冰的速度和表面高度的变化.
主要成果:
- 确定支流作为缓慢和快速冰流之间的广泛过渡区.
- 揭示了相邻的冰流的共同来源区域.
- 在一个由支流入冰流C的地区观察到冰的显著加厚 (0.49米/年),这是南极洲记录的最高速率之一.
结论:
- 亚冰川山谷引导支流流动,影响冰川流动力学.
- 冰流可以从相互连接的,共享的来源区域汲取.
- 停滞地区的快速加厚凸显了复杂的冰动态和潜在的不稳定性.
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