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首页> 外文期刊>IEEE Geoscience and Remote Sensing Letters >Meteorological Origin of the Static Crossover Pattern Present in Low-Resolution-Mode CryoSat-2 Data Over Central Antarctica
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Meteorological Origin of the Static Crossover Pattern Present in Low-Resolution-Mode CryoSat-2 Data Over Central Antarctica

机译：南极中部低分辨率模式CryoSat-2数据中存在的静态交叉模式的气象起源

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摘要

The most effective way of determining the rate of elevation change of the Earth's large ice sheets using radar altimeters is to examine the difference in the elevation measured on ascending and descending orbits. This crossover difference has a static and time-varying component, and by isolating the time-varying part, one can construct a time series of the ice sheet elevation change. The static component of the crossover difference arises as a result of an anisotropic dependence of the extinction coefficient on the angle between the radar polarization and wind-induced features of the firn. Here, the static crossover difference observed by CryoSat-2 over the Antarctic ice sheet is examined, and a simple model is developed to explain the observed pattern. There is an excellent agreement between the modeled results and the observations, calling into question the results of previous studies of the same phenomenon with different radar altimeters.
机译：使用雷达高度计确定地球大冰盖的高程变化率的最有效方法是检查在上升和下降轨道上测得的高程差。这种跨越差异具有静态和时变分量，并且通过隔离时变部分，可以构造冰盖高度变化的时间序列。消光系数各向异性依赖于雷达极化和雷达风致特征之间的夹角，因此产生了分叉差的静态分量。在这里，检查了CryoSat-2在南极冰盖上观测到的静态交叉差异，并开发了一个简单的模型来解释观测到的模式。建模结果与观测值之间存在极好的一致性，这使先前对不同雷达高度计对同一现象的研究结果产生了疑问。

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