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

doi:10.13474/j.cnki.11-2246.2021.0138

测绘通报 ›› 2021, Vol. 0 ›› Issue (5): 38-42.doi: 10.13474/j.cnki.11-2246.2021.0138

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

张翰伟, 陈巍, 李建成

武汉大学测绘学院, 湖北武汉 430079

收稿日期:2020-07-09 发布日期:2021-05-28
通讯作者: 陈巍。E-mail:wchen@sgg.whu.edu.cn
作者简介:张翰伟(1999-),男,硕士生,主要研究方向为GPS数据处理和冰川均衡调整。E-mail:2018202140014@whu.edu.cn
基金资助:
国家自然科学基金(41874025; 41474022);中央高校基本科研业务费(2042016kf0146)

Vertical deformation caused by glacial isostatic adjustment in Canada based on GAMIT/GLOBK and GPS measurements

ZHANG Hanwei, CHEN Wei, LI Jiancheng

School of Geodsy and Geomatics, Wuhan University, Wuhan 430079, China

Received:2020-07-09 Published:2021-05-28

摘要/Abstract

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

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.

Key words: glacial isostatic adjustment, crustal vertical movement, GAMIT/GLOBK, GPS time series

中图分类号:

P228

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.

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.

参考文献

[1] SCHUMACHER M, KING M A, ROUGIER J, et al. A new global GPS data set for testing and improving modelled GIA uplift rates[J]. Geophysical Journal International, 2018, 214(3):2164-2176.
[2] 汪汉胜,WU P, 许厚泽. 冰川均衡调整(GIA)的研究[J]. 地球物理学进展, 2009, 24(6):1958-1967.
[3] DEGRANDPRE K G, FREYMUELLER J T. Vertical velo-cities, glacial isostatic adjustment, and earth structure of Northern and Western Alaska based on repeat GPS measurements[J]. Journal of Geophysical Research:Solid Earth, 2019, 124(8):9148-9163.
[4] PELTIER W R. Postglacial variations in the level of the sea:implications for climate dynamics and solid-earth geophysics[J]. Reviews of Geophysics, 1998,36(4):603-689.
[5] LIDBERG M, JOHANSSON J M, SCHERNECK H G, et al. An improved and extended GPS-derived 3D velocity field of the glacial isostatic adjustment (GIA) in Fennoscandia[J]. Journal of Geodesy, 2007,81(3):213-230.
[6] MILNE G A, DAVIS J L, MITROVICA J X, et al. Space-geodetic constraints on glacial isostatic adjustments in Fennoscandia[J]. Science, 2001, 291(5512):2381-2385.
[7] KHAN S A, SASGEN I, BEVIS M, et al. Geodetic measurements reveal similarities between post-last glacial maximum and present-day mass loss from the Greenland ice sheet[J]. Science Advance, 2016, 2(9):e1600931.
[8] PETROV L, BOY J P. Study of the atmospheric pressure loading signal in very long baseline interferometry observations[J]. Journal of Geophysical Research, 2004, 109(B3):B03405.
[9] PELTIER W R. Global glacial isostasy and the surface of the ice-age Earth:the ICE-5G (VM2) model and GRACE[J]. Annual Review of Earth and Planetary Sciences, 2004, 20(32):111-149.
[10] PELTIER W R, ARGUS D F, DRUMMOND R. Comment on "An assessment of the ICE-6G_C (VM5a) glacial isostatic adjustment model" by Purcell et al[J]. Journal of Geophysical Research:Solid Earth, 2018, 123(2):2019-2028.
[11] GUO J Y, HUANG Z W, SHUM C K, et al. Comparisons among contemporary glacial isostatic adjustment models[J]. Journal of Geodesy, 2012, 61:129-137.
[12] SPADA G, ANTONIOLI A, BOSCHI L, et al. Modeling earth's post-glacial rebound[J]. EOS Transactions, American Geophysical Union, 2004, 85(6):62-64.
[13] ZHOU Y, YANG S M, LUO J S, et al. Global glacial isostatic adjustment constrained by GPS measurements:spherical harmonic analyses of uplifts and geopotential variations[J]. Remote Senses, 2020, 12(7):1209.
[14] PURCELL A, TREGONING P, DEHECQ A. An assessment of the ICE6G_C(VM5a) glacial isostatic adjustment model[J]. Journal of Geophysical Research:Solid Earth, 2016,121(5):3939-3950.
[15] 刘洋洋, 党亚民, 许长辉. 基于GAMIT对国家GNSS基准站进行的北斗基线解算分析[J]. 测绘工程, 2019, 28(3):25-29.
[16] HE X X, MONTILLET J P, FERNANDES R, et al. Review of current GPS methodologies for producing accurate time series and their error sources[J]. Journal of Geodynamics, 2017, 106:12-29.
[17] ME'TIVIER L, ALTAMIMI Z, ROUBY H. Past and present ITRF solutions from geophysical perspectives[J]. Advances in Space Research, 2020, 65(12):2711-2722.
[18] RIVA R E M, FREDERIKSE T, KING M A, et al. Brief communication:the global signature of post-1900 land ice wastage on vertical land motion[J]. The Cryosphere, 2017,11:1327-1332.

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

Vertical deformation caused by glacial isostatic adjustment in Canada based on GAMIT/GLOBK and GPS measurements

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