利用空间技术建立绝对板块运动模型  

Establishing Absolute Plate Motion Model by Space Technologies

作　　者：朱新慧[1] 孙付平[1] 王刃[2] 

机构地区：[1]信息工程大学测绘学院,郑州市陇海中路66号450052 [2]西安测绘研究所,西安市雁塔中路1号710054

出　　处：《武汉大学学报（信息科学版）》2012年第3期282-285,共4页Geomatics and Information Science of Wuhan University

基　　金：国家自然科学基金资助项目(41074011);信息工程大学测绘学院资助项目(Y1003)

摘　　要：利用欧拉定律和ITRF2005的速度场,给出了全球板块运动模型ITRF2005VEL,并计算了全球地壳旋转总角动量之和。采用离散的Tisserand条件对实测的全球台站运动速度进行约束,建立了一个新的基于NNR参考框架的实测的绝对板块运动模型NNR-ITRF2005,并与地学模型NNR-NUVEL1A和ITRF其他序列建立的NNR模型进行了比较和分析。结果表明,从整体上来看,NNR-ITRF2005比较接近于NNR-NU-VEL1A,但个别板块由于测站较少、分布不均或者测站观测时间短对板块的约束不够等原因,使得这些板块的欧拉极与地学模型的偏差较大。Reference datum of global crustal horizontal motion was studied.ITRF2005VEL was obtained based on Euler law and ITRF2005 velocity field,the total angular momentum of the tectonic plates was also calculated and discussed.The absolute plate motion model NNR-ITFR2005 was established based on NNR（no-net-rotation） reference frame through constraining the velocities of ITRF2005 by using the condition of discrete Tisserand,and was compared and analyzed from geological model NNR-NUVEL1A and the other ITRF series NNR models.The results show that there is a better consistency of NNR-ITRF2005 and NNR-NUVEL1A model in whole.While,at the same time,there inevitably exist some differences between NNR-ITRF2005 and NNR-NUVEL1A which are related to the factors of lacking of observation stations,uneven station distributions,short observation times,not enough constraints to plates,and some problems of themselves and so on.At last,the net rotation of the lithosphere was also discussed.

关 键 词：NNR参考框架 绝对板块运动 ITRF2005 岩石圈的整体旋转 

分 类 号：P227.1[天文地球—大地测量学与测量工程]