Bathymetry inversion using the modified gravity-geologic method: application of the rectangular prism model and Tikhonov regularization

doi:10.1007/s11770-020-0821-y

CORC > 海洋研究所 > 中国科学院海洋研究所 > 海洋地质与环境重点实验室

	Bathymetry inversion using the modified gravity-geologic method: application of the rectangular prism model and Tikhonov regularization
	Xing, Jian 2; Chen, Xin-Xi 2; Ma, Long 1,3
刊名	APPLIED GEOPHYSICS
	2020-09-01
卷号	17 期号:3 页码:377-389
关键词	bathymetry gravity inversion Tikhonov regularization
ISSN号	1672-7975
DOI	10.1007/s11770-020-0821-y
通讯作者	Xing, Jian(xingjian@ecs.mnr.gov.cn)
英文摘要	Bathymetry data are usually obtained via single-beam or multibeam sounding; however, these methods exhibit low efficiency and coverage and are dependent on various parameters, including the condition of the vessel and sea state. To overcome these limitations, we propose a method for marine bathymetry inversion based on the satellite altimetry gravity anomaly data as a modification of the gravity-geologic method (GGM), which is a conventional terrain inversion method based on gravity data. In accordance with its principle, the modified method adopts a rectangular prism model for modeling the short-wavelength gravity anomaly and the Tikhonov regularization method to integrate the geophysical constraints, including the a priori water depth data and characteristics of the sea bottom relief. The a priori water depth data can be obtained based on the measurement data obtained from a ship, borehole information, etc., and the existing bathymetry/terrain model can be considered as the initial model. Marquardt's method is used during the inversion process, and the regularization parameter can be adaptively determined. The model test and application to the West Philippine Basin indicate the feasibility and effectiveness of the proposed method. The results indicate the capability of the proposed method to improve the overall accuracy of the water depth data. Then, the proposed method can be used to conduct a preliminary study of the ocean depths. Additionally, the results show that in the improved GGM, the density difference parameter has lost its original physical meaning, and it will not have a great impact on the inversion process. Based on the boundedness of the study area, the inversion result may exhibit a lower confidence level near the margin than that near the center. Furthermore, the modified GGM is time- and memory-intensive when compared with the conventional GGM.
资助项目	National Natural Science Foundation of China[91858212] ; National Natural Science Foundation of China[U1505232] ; Special Project of the National Program on Global Change and Air.Sea Interaction[GASIGEOGE-1] ; Supporting Project of the Youth Marine Science Foundation of East China Sea Branch of State Oceanic Administration[201704] ; Open Fund of the Key Laboratory of Marine Geology and Environment, Chinese Academy of Sciences[MGE2020KG02]
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000605213100005
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/169965]
专题	海洋研究所_海洋地质与环境重点实验室
通讯作者	Xing, Jian
作者单位	1.MNR, Inst Oceanog 1, Qingdao 266061, Peoples R China 2.State Ocean Adm China, East Sea Marine Environm Invest & Surveying Ctr, Shanghai 200137, Peoples R China 3.Chinese Acad Sci, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Xing, Jian,Chen, Xin-Xi,Ma, Long. Bathymetry inversion using the modified gravity-geologic method: application of the rectangular prism model and Tikhonov regularization[J]. APPLIED GEOPHYSICS,2020,17(3):377-389.
APA	Xing, Jian,Chen, Xin-Xi,&Ma, Long.(2020).Bathymetry inversion using the modified gravity-geologic method: application of the rectangular prism model and Tikhonov regularization.APPLIED GEOPHYSICS,17(3),377-389.
MLA	Xing, Jian,et al."Bathymetry inversion using the modified gravity-geologic method: application of the rectangular prism model and Tikhonov regularization".APPLIED GEOPHYSICS 17.3(2020):377-389.