利用垂直重力梯度异常反演海底地形

BATHYMETRY PREDICTION FROM VERTICAL GRAVITY GRADIENT ANOMALIES

根据海底地形与海面重力异常之间的响应函数关系,给出了海底地形起伏与海面垂直重力梯度异常之间的响应函数关系。据此,采用高斯型海山模型,进行了利用垂直重力梯度异常反演海底地形的模拟研究。研究了岩石圈有效弹性厚度、地壳密度以及截断波长对反演结果的影响,并通过实际数据试验计算得到了高精度的海底地形模型。

The response function between seafloor undulation and sea surface vertical gravity gradient anomalies is derived based on the response function between sea floor velief and sea surface gravity anomaly.Accordingly,a simulation research is carried out with Gaussian seamount model.The effects of lithosphere effective elastic thickness,crustal density and the truncation wavelength on predicted results are studied.Finally,a high accuracy bathymetry model was established from actual vertical gravity gradient anomalies data.