| 南极板块运动新模型的确定与分析 |
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| 引用本文： | 姜卫平,鄂栋臣,詹必伟,刘友文.南极板块运动新模型的确定与分析[J].地球物理学报,2009,52(1):41-49. |
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| 作者姓名： | 姜卫平 鄂栋臣 詹必伟 刘友文 |
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| 作者单位： | 1.武汉大学卫星导航定位技术研究中心，武汉 430079;2.武汉大学中国南极测绘研究中心，武汉 430079 |
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| 基金项目： | 国家高技术研究发展计划(863计划)，国家测绘局测绘重点攻关项目，教育部新世纪优秀人才支持计划 |
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| 摘 要： | 自1995年起，国际南极研究科学委员会（SCAR，the Scientific Committee on Antarctic Research）组织实施全南极国际GPS（Global Positioning System）联测.本文运用GAMIT/GLOBK软件分析了从1997到2004年的SCAR GPS数据和在南极的一些GPS永久跟踪站数据.数据处理分为两步，第一步：运用GAMIT软件进行单天解算，估计站位置、轨道等参数，其数据源主要有以下三类：(1) SCAR GPS观测站；（2）南极的连续跟踪站；（3）南极及其周边的部分IGS站；第二步：运用GLOBK软件加入SOPAC（Scripps Orbit and Permanent Array Center）的全球GPS子网（IGS1、IGS2、IGS3）进行全球网平差解算测站位置和速度.然后，参照地质构造讨论网的形变，分析了南极板块的现今地壳运动.GPS结果显示南极板块的欧拉角速度是0.224(°)/Ma，旋转极的位置为（58.69°N，128.29°W），这与NNR-NUVEL-1A预测的和一些前期GPS研究的成果有着较大的不同.相对于澳大利亚板块，本文结果同其他模型的旋转角速度相差约0.01(°)/Ma，旋转极的位置相差在4°以内，不同模型之间的差异相对较小.这为描述南极板块运动提供了一个更为精确的新的运动模型.
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| 关 键 词： | SCAR GPS 速度场 南极板块 地壳运动 |
| 收稿时间： | 2008-4-13 |
| 修稿时间： | 2008-10-21 |
New model of Antarctic plate motion and its analysis |
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| JIANG Wei-Ping,E Dong-Chen,ZHAN Bi-Wei,LIU You-Wen.New model of Antarctic plate motion and its analysis[J].Chinese Journal of Geophysics,2009,52(1):41-49. |
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| Authors: | JIANG Wei-Ping E Dong-Chen ZHAN Bi-Wei LIU You-Wen |
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| Institution: | 1.GNSS Research Center, Wuhan University, Wuhan 430079, China;2.Chinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan 430079, China |
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| Abstract: | Since 1995, Antarctic crustal movement campaign has been taking place by Scientific Committee on Antarctic Research (SCAR) every year. We analyse SCAR campaign data from 1997 to 2004 and some continuous GPS stations in Antarctica using GAMIT/GLOBK software. The data analysis involves two major procedures. The first procedure uses the GAMIT software to estimate parameters such as station position and orbital trajectory on a daily basis for a given 24-hour interval from the union of three data sets: (1) the campaign stations, (2) the continuously operating GPS stations in Antarctica, (3) long-running continuous GPS stations around Antarctica. In the second procedure, we combine the daily solutions with global GPS sub-networks (IGS1, IGS2, IGS3), which is provided by Scripps Institution of Oceanography (SIO), using the GLOBK software in a “regional stabilization” approach in order to estimate the positions and velocities. Then we discuss present-day crustal movement of Antarctic plate. The position of the rotation pole （58.69°N，128.29°W）and its rate (0.224(°)/Ma) derived from SCAR GPS data is significantly different from the NNR-NUVEL-1A estimations or from some GPS results for the Antarctic tectonic plate. As for the relative angular motion between Antarctic and Australian, the differences between the results from the paper and some other models are better. All differences for rotation rate are smaller than 0.01(°)/Ma，and for rotation pole are smaller than 4°. The GPS results give the new and precise model on Antarctic plate motion. |
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| Keywords: | SCAR GPS |
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