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- Title
改进的重力地质法及其在中国南海地区 海底地形反演中的应用.
- Authors
许闯; 黎晋博; 吴云龙
- Abstract
Objectives: The accuracy of the traditional gravity-geologic method (GGM) for inversion of seafloor topography should be improved. Methods: This paper proposes an improved GGM (iGGM) considering the nonlinear term. The 1 arc minute seafloor topography of the South China Sea is inverted by iGGM, and its accuracy is evaluated through check points to verify the effectiveness. Results: The results show that neglecting nonlinear term of seafloor topography results in a deviation of approximately 50 mGal in mountainous areas with undulation of approximately 2 km. The nonlinear term of seafloor topography could be recovered by the iGGM from short-wavelength gravity anomaly. Conclusions: Compared with the traditional GGM, ETPO1 and SIO V23.1, iGGM has the best accuracy. The root mean square of deviations between iGGM and check points is 130.4 m. Compared with traditional GGM, the improvement of iGGM is 10.8 m near the Huangyan seamount chain, and it is 4.7 m near the Zhongsha Islands.
- Subjects
SUBMARINE topography; ROOT-mean-squares; GRAVITY anomalies; INVERSION (Geophysics); ISLANDS
- Publication
Geomatics & Information Science of Wuhan University, 2023, Vol 48, Issue 6, p891
- ISSN
1671-8860
- Publication type
Article
- DOI
10.13203/j.whugis20220199