冰后回弹对全球及中国参考框架的影响分析  

Analysis on influence to the world's and China's Framework caused by postglacial rebound

作　　者：于男[1,2] 程鹏飞[3] 成英燕[2] 李兵[4] 

机构地区：[1]辽宁工程技术大学测绘与地理科学学院,辽宁阜新123000 [2]中国测绘科学研究院,北京100830 [3]国家测绘产品质量检验测试中心,北京100830 [4]山东科技大学测绘科学与工程学院,山东青岛266590

出　　处：《测绘科学》2014年第12期11-14,共4页Science of Surveying and Mapping

基　　金：863计划项目(2013AA122501);国家自然科学基金项目(41374014)

摘　　要：文章利用ICE-5G模型发布的最新预报值,计算分析了冰后回弹对全球和中国区域的影响,发现冰后回弹不仅会引起垂直方向的地壳运动,而且还会引起水平方向的地壳运动,但是水平方向的量级要明显小于垂直方向.全球范围内最大回弹区域位于加拿大,大约为16mm/a,而由冰后回弹所引起的地壳水平方向运动达3mm/a.这个回弹量级对于维持毫米级ITRF的稳定所造成的影响是不容忽视的.中国范围内回弹值大概在0～0.7mm/a,这个量级对于参考框架的影响基本可以忽略.This article used the latest forecast ICE-5G model to give a calculation and analysis on the change of the world and China caused by postglacial rebound. It found that the postglacial rebound can induce crustal motion not only in the vertical direction, but also in the horizontal direction. But the magnitude of the horizontal direction is significantly less than that of the vertical direction. The most remarkable rebound areas of the worldwide locates, which rebound value is approximately 16mm/a, and the horizon- tal crustal motion caused by postglacial rebound is about 3mm/a. This rebound level for maintaining the stability of millimeter level ITRF cannot be ignored. The postglacial rebound value within China is between 0--0.7mm/a, thus the effects of this rebound level to the reference frame can be ignored.

关 键 词：冰后回弹 地壳运动 ICE-5G 国际地球参考框架 2000国家大地坐标系 

分 类 号：P223[天文地球—大地测量学与测量工程]