Reference the seabed topographic depth observations based on the national mean dynamic topography model

• DOI: 10.1016/j.mex.2024.102624
• Publication Date: 2024-02-22T05:47:29Z
• Authors: Thanh Thach Luong; An Dinh Nguyen; Dinh Hai Nguyen; Van Hai Tran; Nhung Le; Thi Thanh Tam Le; Thi Thanh Thuy Pham; Dinh Thanh Nguyen; Thi-Nhung Do
• Keywords: Science; Q; Earth and Planetary Science; 551; Mean dynamic topography Vietnam 22 (MDTVN22); 01 natural sciences; 0105 earth and related environmental sciences

The mean sea surface in different regions is non-equipotential, rendering Vietnam's traditional approach, which relies on the Hon-Dau tide gauge station as a reference, not yet scientifically invalid. To overcome this, our study utilized the Vietnam national mean dynamic topography model (MDTVN22) for depth observations, particularly in the Gulf of Tonkin. Covering 3430 monitoring sites in Hai Phong and 813 sites in Quang Ninh, our experiments highlighted a 5 to 6 mm difference between the mean sea surface and MDTVN22 references. •Our research establishes a resilient methodology, integrating shore tide gauge station data and the MDTVN22 model, aimed at enhancing precision in depth observations.•Validation experiments in Hai Phong demonstrate a minimal discrepancy of ±0.006 m between measurements obtained from the traditional mean sea surface and the MDTVN22 model.•These findings underscore the significance of adopting the MDTVN22 model for improved accuracy in assessing Vietnam's seabed topography.