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本文利用GEM10B卫星重力模型提供的位系数及地幔流应力方程,计算了中国及邻区岩石圈底面的地幔对流应力。在计算过程中,对与地幔对流相关的重力异常场的波长范围的选取作了探讨,结果表明:2-11和12-36阶重力扰动位系数能够反映全地幔尺度和小尺度对流的某些特征,2-36阶位系数对于计算岩石圈底面上大、小尺度地幔对流的联合效应是必要的。
In this paper, the convection stress of the mantle beneath the lithosphere in China and its adjacent areas was calculated by using the bit-coefficients and flow stress equations provided by GEM10B gravity model. In the calculation process, the selection of the wavelength range of the gravity anomaly field related to the convection in the mantle is discussed. The results show that the gravity disturbance potential coefficients of 2-11 and 12-36 can reflect some of the convection in the whole mantle and small scale Features, 2-36 The order coefficient is necessary for calculating the combined effects of large-scale and small-scale mantle convection on the bottom of the lithosphere.