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模拟退火法是一种全局寻优算法,在地球物理反演中得到广泛应用.本文应用快速模拟退火法对中国南海海域的重力垂直梯度进行反演来获得中国南海高分辨率海底地形,首先推导出密度界面与重力垂直梯度的对应关系,然后利用理论模型试验证明快速模拟退火法能成功地根据重力垂直梯度来计算密度界面的变化,最后将其应用于由Geosat,ERS-1/2,T/P,Jason-1,EnviSat-1卫星测高数据计算得到的中国南海海域重力垂直梯度异常,反演得到的中国南海海底地形与LDEO船测海深相接近,两者之间差的最大值为0.24 km.
Simulated annealing method is a global optimization algorithm, which is widely used in geophysical inversion.In this paper, the rapid simulated annealing method is used to invert the vertical gradient of gravity in the South China Sea to obtain the high resolution seafloor topography in the South China Sea. Density interface and gravitational vertical gradient, and then using the theoretical model test to prove that the rapid simulated annealing method can successfully calculate the change of density interface according to the gravitational vertical gradient. Finally, it is applied to the geosat, ERS-1/2, T / P, Jason-1, and EnviSat-1 satellite altimetry data. The inverted sea-level topography of South China Sea obtained by inversion is close to that of LDEO. The maximum value of the difference between the two It is 0.24 km.