作者:Chen, WJ (Chen, Wenjin)[ 1,2 ] ; Tenzer, R (Tenzer, Robert)[ 3 ]
PURE AND APPLIED GEOPHYSICS
卷: 174 期: 4 页: 1743-1757
DOI: 10.1007/s00024-017-1503-4
出版年: APR 2017
摘要
To improve the numerical efficiency, the Fast Fourier Transform (FFT) technique was facilitated in ParkerOldenburg's method for a regional gravimetric Moho recovery, which assumes the Earth's planar approximation. In this study, we extend this definition for global applications while assuming a spherical approximation of the Earth. In particular, we utilize the FFT technique for a global Moho recovery, which is practically realized in two numerical steps. The gravimetric forward modeling is first applied, based on methods for a spherical harmonic analysis and synthesis of the global gravity and lithospheric structure models, to compute the refined gravity field, which comprises mainly the gravitational signature of the Moho geometry. The gravimetric inverse problem is then solved iteratively in order to determine the Moho depth. The application of FFT technique to both numerical steps reduces the computation time to a fraction of that required without applying this fast algorithm. The developed numerical producers are used to estimate the Moho depth globally, and the gravimetric result is validated using the global (CRUST1.0) and regional (ESC) seismic Moho models. The comparison reveals a relatively good agreement between the gravimetric and seismic models, with the RMS of differences (of 4-5 km) at the level of expected uncertainties of used input datasets, while without the presence of significant systematic bias.
关键词
作者关键词:Crust; gravity; lithosphere; Moho; spherical harmonics
KeyWords Plus:SPHERICAL HARMONIC-ANALYSIS; MORITZ INVERSE PROBLEM; CRUSTAL THICKNESS; GRAVITY-FIELD; SEAWATER DENSITY; ISOSTATIC MODEL; HIGH-RESOLUTION;GOCE DATA; RECOVERY; TRANSFORM
作者信息
通讯作者地址: Chen, WJ (通讯作者)
| Wuhan Univ, Sch Geodesy & Geomat, 129 Luoyu Rd, Wuhan 430079, Peoples R China. |
通讯作者地址: Chen, WJ (通讯作者)
| Univ Trieste, Dept Math & Geosci, Trieste, Italy. |
地址:
| [ 1 ] Wuhan Univ, Sch Geodesy & Geomat, 129 Luoyu Rd, Wuhan 430079, Peoples R China |
| [ 2 ] Univ Trieste, Dept Math & Geosci, Trieste, Italy |
| [ 3 ] Univ West Bohemia, Fac Sci Appl, NTIS, Plzen, Czech Republic |
电子邮件地址:[email protected]
基金资助致谢
基金资助机构 | 授权号 |
Chinese Scholarship Council (CSC) | |
Czech Ministry of Education, Youth and Sport | LO1506 |
出版商
SPRINGER BASEL AG, PICASSOPLATZ 4, BASEL, 4052, SWITZERLAND
类别/分类
研究方向:Geochemistry & Geophysics
Web of Science类别:Geochemistry & Geophysics
文献信息
文献类型:Article
语种:English
入藏号: WOS:000398042000014
ISSN: 0033-4553
eISSN: 1420-9136
期刊信息
· Impact Factor (影响因子): 1.677
