| 基于GAMIT/GLOBK和GPS观测确定加拿大地区的冰川均衡调整导致的垂向形变 |
| |
| 引用本文： | 张翰伟,陈巍,李建成.基于GAMIT/GLOBK和GPS观测确定加拿大地区的冰川均衡调整导致的垂向形变[J].测绘通报,2021,0(5):38-42. |
| |
| 作者姓名： | 张翰伟 陈巍 李建成 |
| |
| 作者单位： | 武汉大学测绘学院, 湖北 武汉 430079 |
| |
| 基金项目： | 国家自然科学基金(41874025; 41474022);中央高校基本科研业务费(2042016kf0146) |
| |
| 摘 要： | 本文采用加拿大地区31个IGS台站的观测数据,利用GAMIT/GLOBK软件处理了时间跨度为2000—2018年的GPS原始观测资料,得到了ITRF2014参考框架下的台站位置垂向运动速率的时间序列。对GPS时间序列进行阶跃探测及修复、异常值探测及剔除、趋势项估计、去除近期冰川融化导致的地表弹性变形后,得到了由冰川均衡调整(GIA)导致的GPS台站抬升速率。本文的结果与前人基于GPS观测得到的结果(在ITRF2008框架下)相差在2 mm/a以内,与ICE6G系列GIA模型预测值相差在3 mm/a以内,因此验证了本文结果的正确性和可靠性,为进一步利用全球GPS台站观测数据研究GIA垂直形变速率,进而约束和改进GIA模型打下了坚实基础。
|
| 关 键 词： | 冰川均衡调整 地表垂直形变 GAMIT/GLOBK GPS时间序列 |
| 收稿时间： | 2020-07-09 |
Vertical deformation caused by glacial isostatic adjustment in Canada based on GAMIT/GLOBK and GPS measurements |
| |
| ZHANG Hanwei,CHEN Wei,LI Jiancheng.Vertical deformation caused by glacial isostatic adjustment in Canada based on GAMIT/GLOBK and GPS measurements[J].Bulletin of Surveying and Mapping,2021,0(5):38-42. |
| |
| Authors: | ZHANG Hanwei CHEN Wei LI Jiancheng |
| |
| Institution: | School of Geodsy and Geomatics, Wuhan University, Wuhan 430079, China |
| |
| Abstract: | Based on the GAMIT/GLOBK software, this paper processes the original GPS observation data, with a time span of 2000—2018, from 31 IGS stations in Canada, and obtains the time series of the station vertical velocities under the ITRF2014 reference frame. With jumps corrected and outliers eliminated, this paper removes contributions from elastic deformations caused by the recent melting of glaciers, and estimates the uplift rate of GPS stations caused by glacial isostatic adjustment (GIA) from the GPS time series. The differences between the results and the previous results are within 2 mm/a, and the difference between the results and the predicted value of the ICE6G series GIA model is within 3 mm/a, which verify the correctness and reliability of the results. This study has laid a solid foundation for constraining and improving the GIA model by using observation data from global GPS stations. |
| |
| Keywords: | glacial isostatic adjustment crustal vertical movement GAMIT/GLOBK GPS time series |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《测绘通报》浏览原始摘要信息 |
| 点击此处可从《测绘通报》下载免费的PDF全文 |
|
