Ice and the apparent variation of GPS station positions for Alaska
Ice and the apparent variation of GPS station positions for Alaska
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阿拉斯加的冰和 GPS 站位置的明显变化
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
K. Kochanski
中科院分区：
文献类型：
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作者：
K. Kochanski
阿拉斯加的大多数 GPS 站都显示出一厘米左右的明显季节性变化。大多数这些站点在整个冬季都会向下移动，这种运动与区域降雪同步，并且归因于水文负荷（Fu et. al., 2012）。然而，全州的阶段范围跨越半年，与降雪模式无关。六个站点显示出 1-10 厘米数量级的不连续季节变化。在检查了这些站点的地理位置和风速后，我们得出结论，其中至少三个站点将在冬季积聚雾凇冰，并且这些冰会导致站点明显的向上运动。这一假设得到了站点多径值季节性变化的支持，这表明冬季信号散射增加。论文导师：Thomas Herring 职称：地球物理学教授
Most GPS stations in Alaska show apparent seasonal variations on the order of one centimeter. The majority of these stations move downwards throughout the winter, a motion which is in phase with regional snowfall and has been attributed to hydrological loading (Fu et. al., 2012). The range of phases across the state, however, spans half the year and does not correlate with snow patterns. Six stations show discontinuous seasonal variations on the order of 1-10cm. After examining the geography and windspeed at these sites, we conclude that at least three of them will accumulate rime ice during the winter, and that this ice can cause apparent upwards motions of the stations. This hypothesis is supported by seasonal variations in the stations' multipath values, which indicate increased signal scattering during the winter. Thesis Supervisor: Thomas Herring Title: Professor of Geophysics