Thermal Effects on Vertical Displacement of GPS Stations in China
Thermal Effects on Vertical Displacement of GPS Stations in China
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DOI：
10.1002/cjg2.1492
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发表时间：
2010-03
期刊：
影响因子：
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通讯作者：
Haoming Yan;Wu Chen;Yao-zhong Zhu;Weimin Zhang;M. Zhong;Gen-you Liu
中科院分区：
文献类型：
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作者：
Haoming Yan;Wu Chen;Yao-zhong Zhu;Weimin Zhang;M. Zhong;Gen-you Liu
地表气温变化通过热传导作用，可以改变GPS混凝土柱内部的温度以及GPS台站基岩的温度。此外，这种变化可以产生在GPS站测量的垂直位移的变化。如地下混凝土柱温度变化引起的GPS垂直位移变化，在我国年最大振幅可达1mm，长江以北地区超过0.5mm。中国地壳运动观测网络（CMONOC）的23个GPS测站的最大值为2.8mm，其中13个GPS测站的最大值超过1mm。因此，温度引起的GPS垂直位移变化是GPS测站垂直位移观测年变化的重要组成部分。
Surface air temperature variations can change the temperature within GPS concrete pillars as well as that of the base rock of GPS stations through heat conduction. Furthermore such variations can generate changes of vertical displacement measured at GPS stations. For example, the maximum annual amplitude of GPS vertical displacement variations induced by the temperature change of underground concrete pillar can reach to 1 mm in China, and exceeds 0.5 mm in the areas north of the Yangtze River. This maximum value is 2.8 mm at the 23 GPS stations of the Crustal Movement Observation Network of China (CMONOC), among which the value of 13 GPS stations is over 1 mm. Thus, the variation of GPS vertical displacement caused by temperature is a very important part of the observed annual variations of the vertical displacement measured at GPS stations.