联合测高重力异常与ETOPO5海深数据求解南海海深模型

Solution of the Ocean Depth Model for the South China Sea by Combining Gravity Altimetry and ETOPO5 Deep-sea Data

利用卫星测高重力异常,基于非补偿板块模型,反演了南海海域海底地形.考虑向下延拓容易导致的高频分量剧烈震荡,引入统计学中的统计相关理论,采用线性回归模型,对得到的海深模型进行了新的计算,反演结果与LDEO船测深数据相比较,两者之差的RMS为253.3m,较ETOPO5海深模型精度和分辨率均有明显的提高.

Based on the uncompensated plate model,the ocean depth model for the South China Sea is predicted with the recovered gravity anomalies from satellite altimeter data.Because of the downward continuation problem,the high frequency components of the resulting ocean depth appear highly oscillatory,therefore,according to stochastic correlation theory,a regression model is adopted to reprocess the results computed by Watts model,and a better effect is achieved.