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

Abstract

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

CLC Number:

P315.7

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.

References

[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).

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

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 13

Recommended Articles

Metrics

Comments

[1]	ZHANG Guo-qing, LIANG Wei-feng. Evaluation of the ALOS AW3D30 DEM and EIGEN-6C4 Gravity Anomalies in the Northeastern Qinghai—Xizang Plateau [J]. EARTHQUAKE, 2023, 43(1): 93-104.
[2]	YANG Jian, ZHANG Yu, HU Liang-chen, WANG Lan-wei, ZHU Fu-ying. Impending Ionospheric Anomalies before the 2017 Jiuzhaigou M7.0 Earthquake [J]. EARTHQUAKE, 2022, 42(4): 100-110.
[3]	LIU Xi-kang, DING Zhi-feng, LI Yuan, LI Jin-wu. Application of CEEMDAN in GNSS Time Series Analysis [J]. EARTHQUAKE, 2022, 42(3): 99-110.
[4]	JIN Yang, JIN Hong-lin, GAO Yuan, HUANG Xing. Application of Three Strain Calculation Methods Based on GNSS Data in the Southeastern Margin of Tibet Plateau [J]. EARTHQUAKE, 2021, 41(4): 57-67.
[5]	WANG Wu-xing, LIANG Ming. Regional Gravity Changes Associated with Several Large Earthquakes Observed by GRACE [J]. EARTHQUAKE, 2018, 38(2): 84-94.
[6]	GU Guo-hua. Pre- and Co-seismic Crustal Movements of the 16 April, 2016 Kyushu M7.3 Earthquake, Japan [J]. EARTHQUAKE, 2017, 37(3): 28-37.
[7]	SU Jian-feng, BO Wan-ju. Application of GNSS Vertical Component with High Background Noise to Earthquake Prediction Research [J]. EARTHQUAKE, 2016, 36(1): 105-116.
[8]	ZHAN Wei, WU Yan-qiang, ZHANG Li-bo, ZHU Shuang, MENG Xian-gang. Comparative Analysis of Sub-network Division Schemes for the GNSS Continuous Stations [J]. EARTHQUAKE, 2014, 34(4): 136-142.
[9]	BO Wan-ju, SU Jian-feng, ZHOU Hai-tao, DU Xue-song, WAN Wen-ni, LIU Tian-hai. Application of GNSS for Fault Deformation Studies [J]. EARTHQUAKE, 2014, 34(2): 74-81.
[10]	WU Pei-zhi, SUN Jian-bao, XU Ping, XING Cheng-qi, HU Le-yin, LIANG Fang, HUANG Yi-rei, SHI Yu-fang, JI Hong. Problems and Solutions Encountered in Continuous GNSS Monitoring of Crustal Movement [J]. EARTHQUAKE, 2014, 34(1): 144-151.
[11]	YOU Xin-zhao, YANG Shao-min, WANG Qi. Progress of Crustal Movement Observation and Research in China [J]. EARTHQUAKE, 2012, 32(2): 31-39.
[12]	YANG Guo-hua, YANG Bo, ZHAN Wei, CHEN Xin, HUA Cai-hong, WANG Li. Spatial Distribution of Regional Horizontal Defor- mations before and after the Yushu and Wenchuan Earthquakes [J]. EARTHQUAKE, 2012, 32(2): 40-51.
[13]	YANG Bo, DONG Yun-hong, HAN Yue-ping. Deformation Intensity and Crust Deformation Analysis [J]. EARTHQUAKE, 2010, 30(2): 112-120.