Topography-dependent eikonal tomography based on the fast-sweeping scheme and the adjoint-state technique
文献类型：期刊论文
| 作者 | Guo, Gaoshan2,3; Lan, Haiqiang2,3; Zhou, Xiaole2,3; Liu, Youshan2,3; Bin Waheed, Umair4; Chen, Jingyi1 |
| 刊名 | GEOPHYSICS
 |
| 出版日期 | 2022-03-01 |
| 卷号 | 87期号:2页码:U29-U41 |
| ISSN号 | 0016-8033 |
| DOI | 10.1190/GEO2021-0116.1 |
| 英文摘要 | First-arrival traveltime tomography has been widely used for upper crustal velocity modeling, but it usually suffers from the problem of complex surface topography. To overcome this problem, we have developed a new topography-dependent eikonal tomography scheme that combines a developed accurate and efficient traveltime modeling method and introduces a flexible and robust adjoint inversion scheme in the presence of irregular topography. A surface-flattening scheme is used to handle the irregular surface, where the real model is discretized by curvilinear grids and the irregular free surface is mathematically flattened through the transformation from Cartesian to curvilinear coordinates. Based on this parameterization, the forward traveltime modeling is conducted by a monotone fast-sweeping method that discretizes the factored topography-dependent eikonal equation with a point-source condition. This algorithm can circumvent the source-singularity problem and decrease the numerical error in the vicinity of a point source in the curvilinear system. Then, the gradient-based inversion is used to minimize the misfit function, which is achieved by a matrix-free adjointstate method without cumbersome ray tracing and explicit estimation of the Frechet derivative matrix in the curvilinear coordinate system. The new tomographic scheme is evaluated through numerical examples with different seismic structures with complex topography, and then applied to a wide-angle profile acquired in the northeastern Tibetan Plateau. The results validate the effectiveness and efficiency of our tomography scheme in constructing shallow crustal velocity models with irregular topography. |
| WOS关键词 | TRAVEL-TIME TOMOGRAPHY ; SAN-ANDREAS FAULT ; CRUSTAL STRUCTURE ; NORTHEASTERN TIBET ; WAVE ; INVERSION ; EQUATION ; BENEATH ; MEDIA ; TRANSMISSION |
| 资助项目 | National Natural Science Foundation of China[42022028] ; National Natural Science Foundation of China[41674095] ; National Natural Science Foundation of China[4184065] ; Open Fund Project State Key Laboratory of Lithospheric Evolution[SKLYT201802] ; Strategic Priority Research Program[XDA20070302] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000887918500019 |
| 出版者 | SOC EXPLORATION GEOPHYSICISTS |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; Open Fund Project State Key Laboratory of Lithospheric Evolution ; Open Fund Project State Key Laboratory of Lithospheric Evolution ; Strategic Priority Research Program ; Strategic Priority Research Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Open Fund Project State Key Laboratory of Lithospheric Evolution ; Open Fund Project State Key Laboratory of Lithospheric Evolution ; Strategic Priority Research Program ; Strategic Priority Research Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Open Fund Project State Key Laboratory of Lithospheric Evolution ; Open Fund Project State Key Laboratory of Lithospheric Evolution ; Strategic Priority Research Program ; Strategic Priority Research Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Open Fund Project State Key Laboratory of Lithospheric Evolution ; Open Fund Project State Key Laboratory of Lithospheric Evolution ; Strategic Priority Research Program ; Strategic Priority Research Program |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/107666]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 通讯作者 | Lan, Haiqiang |
| 作者单位 | 1.Univ Tulsa, Dept Geosci, Tulsa, OK 74104 USA 2.Chinese Acad Sci, State Key Lab Lithospher Evolut, Inst Geol & Geophys, Beijing 100029, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.King Fahd Univ Petr & Minerals, Coll Petr Engn & Geosci, Dhahran 31261, Saudi Arabia |
| 推荐引用方式 GB/T 7714 | Guo, Gaoshan,Lan, Haiqiang,Zhou, Xiaole,et al. Topography-dependent eikonal tomography based on the fast-sweeping scheme and the adjoint-state technique[J]. GEOPHYSICS,2022,87(2):U29-U41. |
| APA | Guo, Gaoshan,Lan, Haiqiang,Zhou, Xiaole,Liu, Youshan,Bin Waheed, Umair,&Chen, Jingyi.(2022).Topography-dependent eikonal tomography based on the fast-sweeping scheme and the adjoint-state technique.GEOPHYSICS,87(2),U29-U41. |
| MLA | Guo, Gaoshan,et al."Topography-dependent eikonal tomography based on the fast-sweeping scheme and the adjoint-state technique".GEOPHYSICS 87.2(2022):U29-U41. |
入库方式： OAI收割
来源：地质与地球物理研究所
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