界面起伏对模拟大地水准面的影响  

Effects of Interface Undulations on Simulated Geoid

作　　者：楼立志[1] 方剑[2] 许厚泽[2] 

机构地区：[1]同济大学测量与国土信息工程系,上海200092 [2]中国科学院测量与地球物理研究所,湖北武汉430077

出　　处：《同济大学学报（自然科学版）》2006年第6期848-852,共5页Journal of Tongji University:Natural Science

基　　金：国家自然科学基金资助项目(40374030)

摘　　要：结合中国及邻区的数据,利用界面上下的平均密度差,计算了物质界面起伏对大地水准面的影响,发现莫霍界面的影响占地形质量影响的70%左右,验证了均衡补偿理论.同时也发现,即便加上结晶基底起伏和岩石圈底面起伏的影响,也仅仅是补偿了由地形质量引起的大地水准面起伏的中长波部分,而短波长的地形影响仍然存在.The effect of interface undulations on the geoid in China and its adjacent regions is calculated on the basis of the average density differences of the interfaces in this paper. The result shows that the effect of MOHO interface accounts for about 70 % of the topographical effects, which validates the topography-isostatic theory. It is concluded that the topographical effects can not be fully compensated even if sediment undulation and lithosphere bottom undulation are considered. Actually, only the middle- and long-wavelength parts of geoid undulations are compensated, however the short-wavelength parts of topographical effects still exist.

关 键 词：模拟大地水准面 界面起伏 补偿 

分 类 号：P312[天文地球—固体地球物理学] P223.0[天文地球—地球物理学]