高分辨率卫星重力和激光测高数据的月球岩石圈有效弹性厚度估计的分析及应用

发布时间：2018-01-01 08:13

本文关键词：高分辨率卫星重力和激光测高数据的月球岩石圈有效弹性厚度估计的分析及应用　出处：《地球物理学进展》2016年02期 　论文类型：期刊论文

【摘要】：应用高分辨率GRAIL重力场模型和LOLA激光测高数据,利用两者间重力/地形导纳的统计关系反演月球岩石圈的结构特征是当前的重要手段.在研究区域物理性质各向同性的前提下,可将不同载荷模型引起的岩石圈挠曲量的球谐系数,表示成观测地形球谐系数的函数关系,结合非线性反演算法,可将不同参数的模型导纳谱与观测值进行最优拟合.结果表明导纳方法求解的高地地形平均月壳密度较接近高地地形的平均值2550 kg/m~3.载荷比有正有负,表明内部载荷与表面载荷可能同相也有可能反相,也反映了月球岩石圈较复杂的结构特征.在各向同性的前提下,少部分区域的拟合残差接近其期望值1,可反演出参数的最优解.大部分区域较难反演出最优值,表明月球岩石圈的物理性质大部分并不均一,在各向异性的前提下,在空间域内使用数值计算方法有望对大部分区域的弹性厚度进行最优估计.
[Abstract]:The application of high resolution GRAIL gravity field model and LOLA laser altimeter data, using both gravity / structural features of the statistical relationship between the lunar lithosphere inversion is an important means of terrain mobility at present. In the premise of the physical properties of the study area is isotropic, the spherical harmonic coefficients of lithosphere deflection caused by different load models, expressed as a function of the relationship between terrain observation of spherical harmonic coefficients, combined with nonlinear inversion algorithm, the model parameters of different admittance spectra and observations for the best fitting. The results showed that the average monthly admittance method for solving shell density is close to the highland highland terrain topography average load of 2550 kg/m~3. negative than positive, that the internal load and surface load may in May phase, also reflects the structure characteristics of the lithosphere is complex. In the premise of isotropic, fitting residual small part of the region close The expected value of 1, the optimal inversion parameter solution. Most of the region is difficult to reverse the optimal value, the physical properties of the moon most of the lithosphere is not uniform, in the premise of anisotropy, calculation method is expected to most of the region's elastic thickness were estimated using the optimal values in the space domain.

【作者单位】：贵州师范学院物理与电子科学学院;贵州师范大学物理与电子科学学院;中科院国家天文台-贵州师范大学天文研究与教育中心;
【基金】：国家自然科学基金(41404021、11364007) 贵州省科学技术基金(黔科合J字[2014]2128) 贵州省教育厅自然科学研究项目(黔教合人才团队字[2014]38、黔教科合KY[2014]217)联合资助
【分类号】：P184
【正文快照】： 1.贵州师范学院物理与电子科学学院,贵阳5500182.贵州师范大学物理与电子科学学院,贵阳5500013.中科院国家天文台-贵州师范大学天文研究与教育中心,贵阳5500011.School of Physics and Electronic Science,Guizhou Normal College,Guiyang 550018,China2.School of Physics an

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