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Sensitivity analysis of gravity anomalies and vertical gravity gradient data for bathymetry inversion

文献类型：期刊论文

作者Wan, Xiaoyun2,4; Ran, Jiangjun1; Jin, Shuanggen3
刊名MARINE GEOPHYSICAL RESEARCH
出版日期2019-03-01
卷号40期号:1页码:87-96
关键词Gravity anomaly Vertical gravity gradient Bathymetry inversion Accuracy requirement Seafloor topography
ISSN号0025-3235
DOI10.1007/s11001-018-9361-8
英文摘要Bathymetry is the measurement of the water depth similar to underwater topography. Gravity anomaly and vertical gravity gradient are important data used to inverse bathymetry. In this study, we investigate the sensitivities of the gravity anomalies and vertical gravity gradient data to bathymetry inversion. Firstly, the formulas of the gravity anomaly and vertical gravity gradient signals produced by the seabed terrain are derived, and then a series of numerical studies are designed to investigate the sensitivities. The results show that gravity anomalies and vertical gravity gradients have different sensitive bands to bathymetry inversion. Therefore, accuracy requirements for the gravity anomaly and vertical gravity gradient data are different for bathymetry inversion with different spatial resolutions and accuracies. With decreasing resolution, the accuracy requirement of the gravity anomaly gradually decreases, whereas the accuracy requirement of the vertical gravity gradient first decreases and then increases, indicating that the vertical gravity gradient is more sensitive to the short-wavelength signal than the gravity anomaly, especially in the 0-20km wavelength ranges. In addition, we perform a theoretical analysis that shows that the vertical gravity gradient has a band that is most sensitive to the seafloor topography. This study is capable to provide a reference for the design of future satellites to retrieve the bathymetry.
资助项目National Nature Science funds of China[41674026] ; National Nature Science funds of China[41404019] ; National Nature Science funds of China[41506076] ; Key Laboratory of Space Utilization, Chinese Academy of Sciences[CSU-WX-A-KJ-2016-044] ; China Ocean Mineral Resources R&D Association project[S2-2-06]
WOS研究方向Geochemistry & Geophysics ; Oceanography
语种英语
WOS记录号WOS:000460658100006
出版者SPRINGER
源URL[http://119.78.226.72/handle/331011/31895]  
专题中国科学院上海天文台
通讯作者Ran, Jiangjun; Jin, Shuanggen
作者单位1.Delft Univ Technol, Stevinweg 1, NL-2628 CN Delft, Netherlands
2.China Univ Geosci, Beijing 100083, Peoples R China
3.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China
4.Qian Xuesen Lab Space Technol, Beijing 100094, Peoples R China
推荐引用方式
GB/T 7714		 Wan, Xiaoyun,Ran, Jiangjun,Jin, Shuanggen. Sensitivity analysis of gravity anomalies and vertical gravity gradient data for bathymetry inversion[J]. MARINE GEOPHYSICAL RESEARCH,2019,40(1):87-96.
APA Wan, Xiaoyun,Ran, Jiangjun,&Jin, Shuanggen.(2019).Sensitivity analysis of gravity anomalies and vertical gravity gradient data for bathymetry inversion.MARINE GEOPHYSICAL RESEARCH,40(1),87-96.
MLA Wan, Xiaoyun,et al."Sensitivity analysis of gravity anomalies and vertical gravity gradient data for bathymetry inversion".MARINE GEOPHYSICAL RESEARCH 40.1(2019):87-96.

入库方式： OAI收割

来源：上海天文台

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