地球模型对季节性负荷形变计算的影响以川滇地区为例

doi:10.12196/j.issn.1000-3274.2021.04.003

地震 ›› 2021, Vol. 41 ›› Issue (4): 46-56.doi: 10.12196/j.issn.1000-3274.2021.04.003

地球模型对季节性负荷形变计算的影响以川滇地区为例

佘雅文^1,2, 吴伟伟², 刘泰², 付广裕³

1.南京大学地球科学与工程学院, 江苏南京 210023;
2.中国地震局地震预测研究所, 北京 100036;
3.中国地质大学(北京)地球物理与信息技术学院, 北京 100083

收稿日期:2021-02-21 修回日期:2021-07-21 出版日期:2021-10-31 发布日期:2022-03-25
通讯作者: 付广裕,教授。E-mail:fugy@ief.ac.cn
作者简介:佘雅文(1986-),男,安徽舒城人,博士后,主要从事岩石圈挠曲和地表负荷形变研究。
基金资助:
中国地震局地震预测研究所基本科研业务费专项(2020IEF0502, 2020IEF0708); 中国博士后科学基金资助项目(2020M680618); 国家自然科学基金项目(41874003); 国家重点研发计划项目(2018YFC1503704)

Effect of the Earth Model on the Calculation of Seasonal Load Deformation: A Case Study of the Sichuan—Yunnan Area

SHE Ya-wen^1,2, WU Wei-wei², LIU Tai², FU Guang-yu³

1. School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, China;
2. Key Laboratory of Earthquake Prediction, Institute of Earthquake Forecasting, China Earthquake Administration, Beijing 100036, China;
3. School of Geophysics and Information Technology, China University of Geosciences, Beijing 100083, China

Received:2021-02-21 Revised:2021-07-21 Online:2021-10-31 Published:2022-03-25

摘要/Abstract

摘要： 利用川滇地区的GNSS和GRACE数据, 结合不同地球模型和负荷理论, 研究了地球模型对地表季节性负荷形变计算的影响, 该工作对于选取合适的地球模型开展负荷形变研究具有一定的参考价值。研究表明: ① 川滇地区GNSS观测的地壳垂向季节性形变振幅为20 mm左右, GRACE反演的垂向形变与GNSS的结果相位一致, 振幅存在差异。 ② 区域地球模型的负荷勒夫数与其他地球模型的差异较大, 且负荷勒夫数h_n对地球结构的变化较为敏感。 ③ 区域地球模型可以改善GRACE反演的负荷形变结果, 从而减小与GNSS观测结果的差异。 ④ 川滇地区大部分GNSS测站的加权均方根比值减小量呈现由东北向西南方向逐渐增加的变化趋势。

关键词: GNSS, GRACE, 地表负荷形变

Abstract: This study uses GNSS and GRACE data of the Sichuan-Yunnan area, combined with different Earth models and surface Load theory, to study the effect of the Earth model on the calculation of seasonal surface load deformation. This study has reference value for selecting a suitable Earth model to carry out research in surface load deformation. The research shows: ① The amplitude of the crustal vertical seasonal deformation observed by GNSS at the Sichuan-Yunnan area is about 20 mm. The vertical deformation deduced by GRACE data is consistent in phase with the results of GNSS, but different in amplitudes. ② The load Love numbers of the regional Earth model are quite different from other Earth models, and the load Love number h_n is more sensitive to the change of the Earth’s structure. ③ The regional Earth model can improve the surface load deformation results of GRACE inversion, thereby reducing the difference with GNSS observation results. ④ The reductions of weighted root mean square corresponding to the most GNSS stations at the Sichuan-Yunnan area show a trend of increasing gradually from northeast to southwest.

Key words: GNSS, GRACE, Surface load deformation

中图分类号:

P315.7

佘雅文, 吴伟伟, 刘泰, 付广裕. 地球模型对季节性负荷形变计算的影响以川滇地区为例[J]. 地震, 2021, 41(4): 46-56.

SHE Ya-wen, WU Wei-wei, LIU Tai, FU Guang-yu. Effect of the Earth Model on the Calculation of Seasonal Load Deformation: A Case Study of the Sichuan—Yunnan Area[J]. EARTHQUAKE, 2021, 41(4): 46-56.

参考文献

[1] Heki K. Seasonal modulation of interseismic strain buildup in northeastern Japan driven by snow loads[J]. Science, 2001, 293(5527): 89-92.
[2] van Dam T, Wahr J, Lavallée D. A comparison of annual vertical crustal displacements from GPS and Gravity Recovery and Climate Experiment (GRACE) over Europe[J]. Journal of Geophysical Research: Solid Earth, 2007, 112(B3): B03404.
[3] Zhao Q, Zhang B, Yao Y B, et al. Geodetic and hydrological measurements reveal the recent acceleration of groundwater depletion in North China Plain[J]. Journal of Hydrology, 2019, 575: 1065-1072.
[4] Hao M, Freymueller J T, Wang Q L, et al. Vertical crustal movement around the southeastern Tibetan Plateau constrained by GPS and GRACE data[J]. Earth and Planetary Science Letters, 2016, 437: 1-8.
[5] Yi S, Freymueller J T, Sun W K. How fast is the middle-lower crust flowing in eastern Tibet? A constraint from geodetic observations[J]. Journal of Geophysical Research: Solid Earth, 2016, 121(9): 6903-6915.
[6] Dziewonski A M, Anderson D L. Preliminary reference Earth model[J]. Physics of the Earth and Planetary Interiors, 1981, 25(4): 297-356.
[7] Farrell W E. Deformation of the Earth by surface loads[J]. Reviews of Geophysics, 1972, 10(3): 761-797.
[8] Fu Y N, Freymueller J T. Seasonal and long-term vertical deformation in the Nepal Himalaya constrained by GPS and GRACE measurements[J]. Journal of Geophysical Research: Solid Earth, 2012, 117(B3): B03407.
[9] Chanard K, Avouac J P, Ramillien G, et al. Modeling deformation induced by seasonal variations of continental water in the Himalaya region: Sensitivity to Earth elastic structure[J]. Journal of Geophysical Research: Solid Earth, 2014, 119(6): 5097-5113.
[10] Chanard K, Fleitout L, Calais E, et al. Toward a global horizontal and vertical elastic load deformation model derived from GRACE and GPS station position time series[J]. Journal of Geophysical Research: Solid Earth, 2018, 123(4): 3225-3237.
[11] 张培震, 邓起东, 张国民, 等. 中国大陆的强震活动与活动地块[J]. 中国科学(D辑), 2003, 33(S1): 12-20.
ZHANG Pei-zhen, DENG Qi-dong, ZHANG Guo-min, et al. Strong earthquake activities and active plots in China mainland[J]. Science in China (Series D), 2003, 33(S1): 12-20 (in Chinese).
[12] Bevis M, Brown A. Trajectory models and reference frames for crustal motion geodesy[J]. Journal of Geodesy, 2014, 88(3): 283-311.
[13] Sakumura C, Bettadpur S, Bruinsma S. Ensemble prediction and intercomparison analysis of GRACE time-variable gravity field models[J]. Geophysical Research Letters, 2014, 41(5): 1389-1397.
[14] Kusche J, Schrama E J O. Surface mass redistribution inversion from global GPS deformation and Gravity Recovery and Climate Experiment (GRACE) gravity data[J]. Journal of Geophysical Research: Solid Earth, 2005, 110(B9): B09409.
[15] Takeuchi H, Saito M. Seismic Surface Waves[J]. Methods in Computational Physics: Advances in Research and Applications, 1972, 11: 217-295.
[16] 孙文科, 李瑞浩. 弹性地球的静态负荷响应[J]. 地壳变形与地震, 1986, 6(4): 261-271.
SUN Wen-ke, LI Rui-hao. Static response of the elastic earth to surface load[J]. Crustal Deformation and Earthquake, 1986, 6(4): 261-271 (in Chinese).
[17] Kennett B L N, Engdahl E R, Buland R. Constraints on seismic velocities in the Earth from traveltimes[J]. Geophysical Journal International, 1995, 122(1): 108-124.
[18] Kustowski B, Ekström G, Dziewoński A M. Anisotropic shear-wave velocity structure of the earth’s mantle: A global model[J]. Journal of Geophysical Research: Solid Earth, 2008, 113(B6): B06306.
[19] Pasyanos M E, Masters T G, Laske G, et al. LITHO1.0: An updated crust and lithospheric model of the Earth[J]. Journal of Geophysical Research: Solid Earth, 2014, 119(3): 2153-2173.
[20] Laske G, Masters G, Ma Z, et al. Update on CRUST1.0—A 1-degree global model of Earth’s crust[R]. EGU General Assembly, 2013, 15: 2658.
[21] 何思源, 谷延超, 范东明, 等. 利用GPS垂直位移反演云南省陆地水储量变化[J]. 测绘学报, 2018, 47(3): 332-340.
HE Si-yuan, GU Yan-chao, FAN Dong-ming, et al. Seasonal variation of terrestrial water storage in Yunnan Province inferred from GPS vertical observations[J]. Acta Geodaetica et Cartographica Sinica, 2018, 47(3): 332-340 (in Chinese).

地球模型对季节性负荷形变计算的影响以川滇地区为例

Effect of the Earth Model on the Calculation of Seasonal Load Deformation: A Case Study of the Sichuan—Yunnan Area

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 11

编辑推荐

Metrics

本文评价

[1]	金阳, 金红林, 高原, 黄星. 基于GNSS数据的三种应变计算方法在青藏高原东南缘地区的应用[J]. 地震, 2021, 41(4): 57-67.
[2]	王武星, 梁明. GRACE观测的区域重力场变化与大地震关系探讨[J]. 地震, 2018, 38(2): 84-94.
[3]	苏建锋, 薄万举. 高噪声背景下GNSS垂向分量应用探讨[J]. 地震, 2016, 36(1): 105-116.
[4]	杨博, 朱爽, 周海涛, 万文妮. 2013年松原M_S5.8地震的地壳水平形变背景[J]. 地震, 2015, 35(2): 72-79.
[5]	占伟, 武艳强, 章力博, 朱爽, 孟宪纲. 陆态网络GNSS连续站分区解算方案的对比分析[J]. 地震, 2014, 34(4): 136-142.
[6]	吴培稚, 孙建宝, 徐平, 邢成起, 胡乐银, 梁芳, 黄雨蕊, 施玉芳, 季红. 东日本地震在北京GNSS连续观测站E分量的反应[J]. 地震, 2014, 34(4): 152-157.
[7]	薄万举, 苏建锋, 周海涛, 杜雪松, 万文妮, 刘天海. GNSS在断层形变研究中的应用[J]. 地震, 2014, 34(2): 74-81.
[8]	吴培稚, 孙建宝, 徐平, 邢成起, 胡乐银梁芳, 黄雨蕊, 施玉芳, 季红. 利用北京GNSS连续站监测地壳运动遇到的问题及解决办法[J]. 地震, 2014, 34(1): 144-151.
[9]	游新兆, 杨少敏, 王琪. 中国大陆地壳运动观测研究进展[J]. 地震, 2012, 32(2): 31-39.
[10]	杨国华, 杨博, 占伟, 陈欣, 华彩虹, 王利. 玉树和汶川地震前后区域水平形变的空间分布[J]. 地震, 2012, 32(2): 40-51.
[11]	杨博, 董运洪, 韩月萍. 形变强度与地壳变形分析[J]. 地震, 2010, 30(2): 112-120.