Advanced Radar Imaging of Geophysical Flows
Advanced Radar Imaging of Geophysical Flows
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地球物理流的高级雷达成像
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
J. McElwaine
中科院分区：
文献类型：
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作者：
P. Brennan;M. Ash;F. N. M. Isa;C. Keylock;J. McElwaine
雪崩和火山碎屑流等地球物理流动的动力学引起了人们的极大兴趣，尤其是因为它们可能造成灾难性后果，近年来受到了极大的关注。已经制定了各种模型来预测这种流动的行为，但目前缺乏适当的实验数据来验证这些模型并为特定情况下模型或系数的选择提供信息。例如，雷达测量在观察雪崩时很有用，以便提供粉末云下雪运动的速度矢量信息，从而提供使用光学仪器无法获得的信息。简单的雷达观测，包括低分辨率的一维距离像，已经由雪崩组成。这项工作致力于开发和利用一种更复杂的雷达仪器，能够对雪崩和火山碎屑流进行高分辨率的三维成像，以便在观测数据方面逐步改进，以便与一系列流动规律进行比较。
The dynamics of geophysical flows such as snow avalanches and pyroclastic flows are of great interest, not least due to their potential for catastrophic consequences, and have received substantial attention over recent years. A variety of models have been formulated to predict the behaviour of such flows but there is currently a lack of suitable experimental data to validate these models and inform the choice of model or coefficients for a given situation. Radar measurements are useful in, for instance, observation of snow avalanches in order to provide velocity vector information of the movements of snow below the powder cloud, thus providing information that is not available using optical instruments. Simple radar observations, consisting of a one-dimension range profile of low resolution, have been made of snow avalanches. This work sets out to develop and utilize a more sophisticated radar instrument able to perform high resolution 3-D images of, in particular, snow avalanches but also pyroclastic flows, in order to provide a step improvement in the observational data with which to compare with a range of flow laws.