冰期后地壳回弹运动的空间大地测量检测  

SPACE GEODETIC DETECTION OF POSTGLACIAL REBOUND

作　　者：孙付平[1] 宁津生[1] 晁定波[1] 赵铭[2] 钱志瀚[2] 

机构地区：[1]武汉测绘科技大学地测院 [2]中国科学院上海天文台

出　　处：《测绘学报》1997年第4期283-288,共6页Acta Geodaetica et Cartographica Sinica

摘　　要：本文讨论了用空间大地测量地壳运动观测量（基线变化率、站速度）检测冰期后地壳回弹运动的方法和结果。通过最近获得的空间大地测量地壳运动观测结果与最新冰期后地壳回弹模型ＩＣＥ－４Ｇ的估计值的比较和相关分析，发现两者有较好的一致性，相关系数高达０．８０～０．９０，说明目前的空间大地测量技术已能够检测出１～１０ｍｍ／ａ量级的冰期后地壳回弹运动。但实测结果比ＩＣＥ－４Ｇ估计值在绝对值上总体偏大约１．５倍，有可能表明目前发生的冰期后地壳回弹运动比地球物理估计值更为剧烈。This paper discusses the methods and results of detection of postglacial rebound by using space geodetic measurements(rates of change for baselines, site velocities). The comparison and correlation analysis between space geodetic results and predictions of postglacial rebound from the new geophysical model ICE-4G shows that they have good agreement, their high correlation(about 0.80￣0.90), indicates that space geodetic techniques now have been able to detect postglacial rebound at 1￣10 mm/a level. However, the space geodetic results are generally 1.5 times larger in absolute value than ICE-4G predictions, which probably shows that the current postglacial rebound motions are more violent than the geophysical predictions.

关 键 词：空间大地测量 基线变化率 冰期后 地壳回弹 

分 类 号：P542[天文地球—构造地质学] P22[天文地球—地质学]