我国GPS基准站地壳垂直位移周年变化的气象激发

Annual vertical crustal displacements predicted from surface mass redistribution at GPS stations in China

利用全球大气、海洋、积雪和土壤水的地表质量负荷资料 ,计算了中国GPS基准网 2 4个台站垂向位移周年变化的气象激发 ,得到振幅 5mm10mm的高程变化。通过与GPS观测资料解算的垂向位移结果比较 ,大部分台站的结果与GPS结果在振幅上符合比较好 。

Annual vertical crustal displacements at 24 GPS stations in china are estimated from the global atmospheric,oceanic and hydrological mass redistributions.The amplitude variations of annual vertical motions at these stations are 5mm～10mm.A comparison is then performed for each station between the predicted results (from climatology) and the observed ones (by GPS),which reveals that there are generally good agreements in amplitude,but the phases of the predicted results are ahead one to two months to those of GPS approximately.