Towards Bedmap Himalayas: development of an airborne ice-sounding radar for glacier thickness surveys in High-Mountain Asia
Towards Bedmap Himalayas: development of an airborne ice-sounding radar for glacier thickness surveys in High-Mountain Asia
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DOI：
10.1017/aog.2020.29
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发表时间：
2020-04-01
影响因子：
2.9
通讯作者：
Kayastha, R.
中科院分区：
文献类型：
--
作者：
Pritchard, H. D.;King, E. C.;Kayastha, R.
亚洲高山地区（HMA）冰川的厚度对于确定冰储量何时会因冰川变薄而消失至关重要，但由于测量数据极少，人们对其了解非常不足。通过一系列地面和空中实地测试，我们对一种最初为南极雪上测量而开发的低频透冰雷达进行了改造，使其能够作为直升机载系统进行部署，以增加测量次数。直升机提供的机动性以及我们的系统能够透过厚的、脏的、温带冰层探测冰川底部的能力，使其非常适合大幅增加可用于校准区域和全球尺度冰厚模型的测量样本。“喜马拉雅冰床地图”雷达测量系统可以降低当前冰量的不确定性，从而降低对亚洲高山地区河流流域何时会失去这种抵御干旱的水文缓冲的预测的不确定性。
The thickness of glaciers in High-Mountain Asia (HMA) is critical in determining when the ice reserve will be lost as these glaciers thin but is remarkably poorly known because very few measurements have been made. Through a series of ground-based and airborne field tests, we have adapted a low-frequency ice-penetrating radar developed originally for Antarctic over-snow surveys, for deployment as a helicopter-borne system to increase the number of measurements. The manoeuvrability provided by helicopters and the ability of our system to detect glacier beds through thick, dirty, temperate ice makes it well suited to increase greatly the sample of measurements available for calibrating ice thickness models on the regional and global scale. The Bedmap Himalayas radar-survey system can reduce the uncertainty in present-day ice volumes and therefore in projections of when HMA's river catchments will lose this hydrological buffer against drought.