基于IGS连续运行站的地壳非对称运动趋势研究

本文利用IGS全球分布的连续运行站研究了地壳运动趋势。首先利用线性拟合计算了各运行站的高程方向线性速度,然后利用求得的线性速度计算了不同纬度的闭合环纬线变化率。结果表明,地壳各点运动趋势既不均衡也不对称;南半球闭合环纬线变化率全部为正值,说明南半球纬线圈处于拉伸状态,反映南半球整体膨胀趋势;北半球变化率有正有负,说明北半球整体变化趋势不明显。通过分析得出地壳存在非对称运动趋势的结论。

The study about inetegrated motion of the earth based on the IGS fiduical stations

The paper has studied the integrated motion of the Earth by analysis IGS fiduical stations datum collected for many years. Firstly, the elevation linear velocity of many stations was calculated by linear fitting. Then, the rates of change of the closed circuits in different latitude were computed. The results indicated that the motion trends of stations were neither proportion nor symmetry. The values of the southern hemisphere are all positive, which indicate a trend that the southern hemisphere is integrated expanding. While the values of the northern hemisphere are both positive and negative, it shows there is not a sharp trend that the northern hemisphere is integrated motive. It concludes that the earth crust has an asymmetry motion trend.