“陆态网”GPS与GRACE的中国大陆地表垂直形变对比分析

doi:10.11947/j.AGCS.2018.20170281

摘要/Abstract

摘要： 基于中国大陆构造环境监测网络的连续GPS观测数据，比较分析了中国大陆234个GPS台站和GRACE得到的地表垂直形变。GPS和GRACE垂直形变具有较好的一致性，反映了地表质量变化是引起GPS垂直形变非线性变化的重要因素之一，但二者也存在着一定的差异。为定量分析GPS和GRACE垂直形变的差异，探讨了热膨胀效应对GPS垂直位移的影响及区域地壳结构对GRACE估算地表垂直负荷形变的影响。结果表明，中国大陆50%以上的GPS台站热膨胀垂直形变周年振幅不小于1 mm；对GPS进行热膨胀效应改正后，中国大陆GPS与GRACE垂直形变具有更好的一致性；GPS与GRACE垂直形变周年振幅比值由1.07±0.06变为1.01±0.05；热膨胀效应可以解释6.2%的GPS与GRACE垂直形变的差异，热膨胀效应改正可使GPS和GRACE垂直形变的一致性相对增加11.2%。是否顾及区域地壳结构引起的GRACE估算中国大陆垂直负荷形变的相对差异为2.5%。

关键词: 中国大陆, 垂直形变, GPS, GRACE, 热膨胀, 区域地壳结构, 差异分析

Abstract: Based on continuous GPS data from crustal movement observation network of China (CMONOC), the vertical deformations on Earth's surface observed by 234 GPS stations and GRACE in mainland China are compared with each other.GPS-observed and GRACE-derived vertical deformations are in good agreements in general, which indicates that mass loading is an important factor to GPS nonlinear variations, but there are some differences between GPS and GRACE.For further analyzing the difference between GPS and GRACE vertical deformations, we take into account the thermal expansion effects to GPS vertical deformations and the effect of regional crustal structure on vertical loading deformations derived from GRACE.It is found that the annual amplitudes of vertical deformations induced by thermal expansion are not less than 1 mm at more than 50% of GPS stations.After considering thermal deformations, the vertical deformations of GPS and GRACE are with higher consistency in mainland China.The ratio of annual amplitudes from GPS and GRACE vertical deformations changes from 1.07±0.06 to 1.01±0.05, which is closer to the ideal value of 1.Thermal expansion can explain 6.2% of the difference between GPS and GRACE vertical deformations.And it can increase the consistency of vertical deformations between GPS and GRACE by 11.2% relatively after thermal expansion correction.The regional crustal structure has little effect on GRARE-derived vertical loading deformations in mainland China and the relative difference is 2.5%.

Key words: mainland China, vertical deformation, GPS, GRACE, thermal expansion, regional crustal structure, difference analysis

中图分类号:

P227

贾路路, 王阅兵, 连尉平, 相龙伟. “陆态网”GPS与GRACE的中国大陆地表垂直形变对比分析[J]. 测绘学报, 2018, 47(7): 899-906.

JIA Lulu, WANG Yuebing, LIAN Weiping, XIANG Longwei. Comparison and Analysis of Crustal Vertical Deformation in Mainland China Observed by GPS from CMONOC and GRACE[J]. Acta Geodaetica et Cartographica Sinica, 2018, 47(7): 899-906.

参考文献

[1] FARRELL W E. Deformation of the Earth by Surface Loads[J]. Reviews of Geophysics and Space Physics, 1972, 10(3):761-797.
[2] TESMER V, STEIGENBERGER P, VAN DAM T, et al. Vertical Deformations from Homogeneously Processed GRACE and Global GPS Long-term Series[J]. Journal of Geodesy, 2011, 85(5):291-310.
[3] 王林松, 陈超, 邹容, 等. 利用GPS与GRACE监测陆地水负荷导致的季节性水平形变:以喜马拉雅山地区为例[J]. 地球物理学报, 2014, 57(6):1792-1804. WANG Linsong, CHEN Chao, ZOU Rong, et al. Using GPS and GRACE to Detect Seasonal Horizontal Deformation Caused by Loading of Terrestrial Water:A Case Study in the Himalayas[J]. Chinese Journal of Geophysics, 2014, 57(6):1792-1804.
[4] 魏娜, 施闯, 刘经南. 基于GPS和GRACE数据的三维地表形变的比较及地球物理解释[J]. 地球物理学报, 2015, 58(9):3080-3088. WEI Na, SHI Chuang, LIU Jingnan. Annual Variations of 3D Surface Displacements Observed by GPS and GRACE Data:A Comparison and Explanation[J]. Chinese Journal of Geophysics, 2015, 58(9):3080-3088.
[5] 姜卫平, 李昭, 刘鸿飞, 等. 中国区域IGS基准站坐标时间序列非线性变化的成因分析[J]. 地球物理学报, 2013, 56(7):2228-2237. JIANG Weiping, LI Zhao, LIU Hongfei, et al. Cause Analysis of the Non-linear Variation of the IGS Reference Station Coordinate Time Series Inside China[J]. Chinese Journal of Geophysics, 2013, 56(7):2228-2237.
[6] YAN Haoming, CHEN Wu, YUAN Linguo. Crustal Vertical Deformation Response to Different Spatial Scales of GRACE and GCMS Surface Loading[J]. Geophysical Journal International, 2016, 204(1):505-516.
[7] XIANG Longwei, WANG Hansheng, STEFFEN H, et al. Groundwater Storage Changes in the Tibetan Plateau and Adjacent Areas Revealed from GRACE Satellite Gravity Data[J]. Earth and Planetary Science Letters, 2016, 449(3):228-239.
[8] 卢飞, 游为, 范东明, 等. 由GRACE RL05数据反演近10年中国大陆水储量及海水质量变化[J]. 测绘学报, 2015, 44(2):160-167. DOI:10.11947/j.AGCS.2015.20130753. LU Fei, YOU Wei, FAN Dongming, et al. Chinese Continental Water Storage and Ocean Water Mass Variations Analysis in Recent Ten Years Based on GEACE RL05 Data[J]. Acta Geodaetica et Cartographica Sinica, 2015, 44(2):160-167. DOI:10.11947/j.AGCS.2015.20130753.
[9] WANG Hansheng, JIA Lulu, STEFFEN H, et al. Increased Water Storage in North America and Scandinavia from GRACE Gravity Data[J]. Nature Geoscience, 2013, 6(1):38-42.
[10] 贾路路, 汪汉胜, 相龙伟. 利用GRACE、GPS和绝对重力数据监测斯堪的纳维亚陆地水储量变化[J]. 测绘学报, 2017, 46(2):170-178. DOI:10.11947/j.AGCS.2017.20160272. JIA Lulu, WANG Hansheng, XIANG Longwei. Measuring Terrestrial Water Storage Change Using GRACE, GPS and Absolute Gravity Data in Scandinavia[J]. Acta Geodaetica et Cartographica Sinica, 2017, 46(2):170-178. DOI:10.11947/j.AGCS.2017.20160272.
[11] VELICOGNA I, WAHR J. Measurements of Time-variable Gravity Show Mass Loss in Antarctica[J]. Science, 2006, 311(5768):1754-1756.
[12] CHEN J L, WILSON C R, BLANKENSHIP D, et al. Accelerated Antarctic Ice Loss from Satellite Gravity Measurements[J]. Nature Geoscience, 2009, 2(12):859-862.
[13] TREGONING P, WATSON C, RAMILLIEN G, et al. Detecting Hydrologic Deformation Using GRACE and GPS[J]. Geophysical Research Letters, 2009, 36(15):L15401.
[14] RIETBROEK R, FRITSCHE M, BRUNNABEND S E, et al. Global Surface Mass from a New Combination of GRACE, Modelled OBP and Reprocessed GPS Data[J]. Journal of Geodynamics, 2012, 59(1):64-71.
[15] 廖海华, 钟敏, 周旭华. 利用GRACE卫星重力资料解算气候驱动的地表周年垂直形变[J]. 地球物理学报, 2010, 53(5):1091-1098. LIAO Haihua, ZHONG Min, ZHOU Xuhua. Climate-driven Annual Vertical Deformation of the Solid Earth Calculated from GRACE[J]. Chinese Journal of Geophysics, 2010, 53(5):1091-1098.
[16] DAVIS J L, ELÓSEGUI P, MITROVICA J X, et al. Climate-driven Deformation of the Solid Earth from GRACE and GPS[J]. Geophysical Research Letters, 2004, 31(24):L24605.
[17] VAN DAM T, WAHR J, LAVALLÉ E D. A Comparison of Annual Vertical Crustal Displacements from GPS and Gravity Recovery and Climate Experiment (GRACE) over Europe[J]. Journal of Geophysical Research, 2007, 112(B3):B03404.
[18] FU Yuning, FREYMUELLER J T. Seasonal and Long-term Vertical Deformation in the Nepal Himalaya Constrained by GPS and GRACE Measurements[J]. Journal of Geophysical Research, 2012, 117(B3):B03407.
[19] ZOU Rong, WANG Qi, FREYMUELLER J T, et al. Seasonal Hydrological Loading in Southern Tibet Detected by Joint Analysis of GPS and GRACE[J]. Sensors, 2015, 15(12):30525-30538.
[20] HAO Ming, 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):1-8.
[21] YAN Haoming, CHEN Wu, ZHU Yaozhong, et al. Contributions of Thermal Expansion of Monuments and Nearby Bedrock to Observed GPS Height Changes[J]. Geophysical Research Letters, 2009, 36(13):L13301.
[22] 闫昊明, 陈武, 朱耀仲, 等. 温度变化对我国GPS台站垂直位移的影响[J]. 地球物理学报, 2010, 53(4):825-832. YAN Haoming, CHEN Wu, ZHU Yaozhong, et al. Thermal Effects on Vertical Displacement of GPS Stations in China[J]. Chinese Journal of Geophysics, 2010, 53(4):825-832.
[23] GU Yanchao, YUAN Linguo, FAN Dongming, et al. Seasonal Crustal Vertical Deformation Induced by Environmental Mass Loading in Mainland China Derived from GPS, GRACE and Surface Loading Models[J]. Advances in Space Research, 2017, 59(1):88-102.
[24] DZIEWONSKI A M, ANDERSON D L. Preliminary Reference Earth Model[J]. Physics of the Earth and Planetary Interiors, 1981, 25(4):297-356.
[25] WANG Hansheng, XIANG Longwei, JIA Lulu, et al. Load Love Numbers and Green's Functions for Elastic Earth Models Prem, iasp91, ak135, and Modified Models with Refined Crustal Structure from Crust 2.0[J]. Computers & Geosciences, 2012, 49(2):190-199.
[26] DILL R, KLEMANN V, MARTINEC Z, et al. Applying Local Green's Functions to Study the Influence of the Crustal Structure on Hydrological Loading Displacements[J]. Journal of Geodynamics, 2015, 88(1):14-22.
[27] 贾路路, 相龙伟, 汪汉胜. 地壳结构对GRACE估算中国大陆地表垂直负荷形变的影响[J]. 地球科学进展, 2014, 29(7):828-834. JIA Lulu, XIANG Longwei, WANG Hansheng. Effects of Crustal Structure for Estimation of Vertical Load Deformation on the Solid Earth Using GRACE in China Mainland[J]. Advances in Earth Science, 2014, 29(7):828-834.
[28] WANG Hansheng, XIANG Longwei, WU P, et al. Effects of the Tibetan Plateau Crustal Structure on the Inversion of Water Trend Rates Using Simulated GRACE/GPS Data[J]. Terrestrial, Atmospheric and Oceanic Sciences Journal, 2013, 24(4):505-512.
[29] 李强, 游新兆, 杨少敏, 等. 中国大陆构造变形高精度大密度GPS监测-现今速度场[J]. 中国科学(地球科学), 2012, 42(5):629-632. LI Qiang, YOU Xinzhao, YANG Shaomin, et al. A Precise Velocity Field of Tectonic Deformation in China as Inferred from Intensive Gps Observations[J]. Science China Earth Sciences, 2012, 42(5):629-632.
[30] 姜卫平, 王锴华, 邓连生, 等. 热膨胀效应对GNSS基准站垂向位移非线性变化的影响[J]. 测绘学报, 2015, 44(5):473-480. DOI:10.11947/j.AGCS.2015.20140296. JIANG Weiping, WANG Kaihua, DENG Liansheng, et al. Impact on Nonlinear Vertical Variation of GNSS Reference Stations Caused by Thermal Expansion[J]. Acta Geodaetica et Cartographica Sinica, 2015, 44(5):473-480. DOI:10.11947/j.AGCS.2015.20140296.
[31] DONG D, FANG P, BOCK Y, et al. Anatomy of Apparent Seasonal Variations from GPS-derived Site Position Time Series[J]. Journal of Geophysical Research, 2002, 107(B4):2075.
[32] WAHR J, MOLENAAR M, BRYAN F. Time Variability of the Earth's Gravity Field:Hydrological and Oceanic Effects and Their Possible Detection Using GRACE[J]. Journal of Geophysical Research, 1998, 103(B12):30205-30229.
[33] SWENSON S, CHAMBERS D, WAHR J. Estimating Geocenter Variations from a Combination of GRACE and Ocean Model Output[J]. Journal of Geophysical Research, 2008, 113(B8):B08410.
[34] CHENG Minkang, TAPLEY B D. Variations in the Earth's Oblateness During the Past 28 Years[J]. Journal of Geophysical Research, 2004, 109(B9):B09402.
[35] CHAMBERS D P. Evaluation of New GRACE Time-variable Gravity Data over the Ocean[J]. Geophysical Research Letters, 2006, 33(17):L17603.
[36] CHEN J L, WILSON C R, FAMIGLIETTI J S, et al. Attenuation Effect on Seasonal Basin-scale Water Storage Changes from GRACE Time-variable Gravity[J]. Journal of Geodesy, 2007, 81(4):237-245.
[37] TAN Weijie, DONG Danan, CHEN Junping, et al. Analysis of Systematic Differences from GPS-measured and GRACE-modeled Deformation in Central Valley, California[J]. Advances in Space Research, 2016, 57(1):19-29.
[38] LASKE G, MASTERS G, REIF C. Crust 2.0:A New Global Crustal Model at 2×2 Degrees[DB/OL].[2014-02-17]. https://igppweb.ucsd.edu/~gabi/crust2.html.