利用超导重力数据研究若干地球科学问题的进展  

Development of investigations in some geo-scientific problems using superconducting gravimeter data

作　　者：王迪晋[1] 申文斌[1,2] 

机构地区：[1]武汉大学测绘学院,武汉430079 [2]武汉大学地球空间环境与大地测量教育部重点实验室,武汉430079

出　　处：《测绘科学》2009年第S1期10-13,152,共5页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(No.40637034;No.40574004)

摘　　要：本文首先介绍了"全球地球动力学计划"的最新进展情况,综述了基于超导重力数据研究时变重力场的研究进展,内容主要包括重力潮汐和自由核章动参数测定,海潮模型有效性检验,大气负荷信号改正,地球自由振荡以及核模的检测。文章还介绍了全球超导重力仪的长期连续观测记录在研究地球对自转变化的响应特征、地下水储量变化和标定重力卫星等方面发挥的重要作用,并探讨了利用全球超导重力数据探测地球内核超速旋转的可能性。最后指出,超导重力仪对全球地震事件的记录为我们研究地震预测、震源机制解以及重力场受地壳长期形变影响的特征提供了良好的机遇。This paper first introduces the latest development of the Global Geodynamical Project(GGP),and reviews the achievements on studying the temporal gravity field based on the superconducting gravimeters(SG) in the GGP network,including measuring the parameters of the gravity tide and free core nutation(FCN),the validation of the ocean tide model,the atmospheric pressure loading correction,and the detections of the Earth free oscillation and core mode.And then it is shown that the long-term continuous observations of the global SG play an important role in the Earth's response characteristics with respect to the rotation changes,groundwater changes and the calibration of the space satellite data.Finally we discuss the possibility of detecting the inner core's super rotation using SG records,and further show that the global SG records due to the seismic events provide a good opportunity to study the earthquake prediction,focal mechanism solutions as well as the gravitational field characteristics stemmed from the crustal deformation.

关 键 词：超导重力数据 潮汐 大气负荷 地球自由振荡 内核晃动及超速旋转 

分 类 号：P223[天文地球—大地测量学与测量工程]