DOI: 10.1016/j.epsl.2018.08.037
Scopus记录号: 2-s2.0-85053063972
论文题名: Spatially varying surface seasonal oscillations and 3-D crustal deformation of the Tibetan Plateau derived from GPS and GRACE data
作者: Pan Y. ; Shen W.-B. ; Shum C.K. ; Chen R.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 502 起始页码: 12
结束页码: 22
语种: 英语
英文关键词: crustal deformation
; GPS 3-D velocity
; GRACE-derived mass loads
; spatial surface seasonal oscillations
; Tibetan Plateau
Scopus关键词: Deformation
; Global positioning system
; Gravitation
; Maximum likelihood estimation
; Orthogonal functions
; Principal component analysis
; Shear strain
; Stochastic systems
; Strike-slip faults
; Time series analysis
; Velocity
; Crustal deformations
; Empirical orthogonal function methods
; Gravity Recovery and Climate Experiment missions
; Mass load
; Northeastern tibetan plateaux
; spatial surface seasonal oscillations
; Stochastic error models
; Tibetan Plateau
; White noise
; crustal deformation
; crustal thickening
; Eurasian plate
; GPS
; GRACE
; maximum likelihood analysis
; power law
; principal component analysis
; seasonal variation
; spatial variation
; three-dimensional modeling
; time series analysis
; China
; Qinghai-Xizang Plateau
; Xianshuihe Fault Zone
; Xiaojiang Fault Zone
; Yunnan
英文摘要: Measurements of 189 continuous and 933 campaign-mode Global Positioning System (GPS) stations with 3–16 yr data spans over the Tibetan Plateau reveal contemporary three-dimensional (3-D) crustal deformation during 1999–2016. The Empirical Orthogonal Function method was used to characterize the spatial variations in the surface deformation with distinct seasonal oscillations at the GPS sites in five regions of the Tibetan Plateau. We find that these surface variations are highly correlated with the corresponding mass load signals observed by the Gravity Recovery and Climate Experiment (GRACE) mission. The improved GPS processing strategy used to determine the 3-D velocity field includes maximum likelihood estimation, removal of common mode errors from GPS time series using Principal Component Analysis (PCA), and power law plus white noise stochastic error modeling. We determined the rates of vertical crustal movement by removing GRACE-observed non-tectonic origin load deformation, 2002–2016. The corrected vertical crustal deformation shows that the Himalaya region is uplifting at an average rate of ∼1.7 mm yr−1, and that the northeastern Tibetan Plateau is uplifting at an average rate of ∼1.3 mm yr−1. In addition, the horizontal velocity relative to the stable Eurasian plate and its corresponding dilatation throughout the Tibetan Plateau suggest that tectonic shortening and crustal thickening is occurring at −90 to −80 nanostrain yr−1 in the southern Tibetan Plateau and −30 to −20 nanostrain yr−1 in the northeastern Tibetan Plateau, which could be related to the geologic shortening and elastic strain accumulation. The interior Tibetan Plateau exhibits crustal thinning and block movement along strike-slip faults. Eastward motion of the crust north of the Xianshuihe-Xiaojiang Fault system relative to crust to its south results in shear strain and reflects eastward escape of plastic crustal material in the southeastern Tibetan Plateau. © 2018 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109644
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan, 430079, China; School of Geodesy and Geomatics, Wuhan University, Wuhan, 430079, China; Division of Geodetic Science, School of Earth Sciences, Ohio State University, Columbus, OH 43210, United States; State Key Laboratory of Geodesy and Earth's Dynamics, Institute of Geodesy & Geophysics, Chinese Academy of Sciences, Wuhan, 430077, China
Recommended Citation:
Pan Y.,Shen W.-B.,Shum C.K.,et al. Spatially varying surface seasonal oscillations and 3-D crustal deformation of the Tibetan Plateau derived from GPS and GRACE data[J]. Earth and Planetary Science Letters,2018-01-01,502