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Journal Article

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

Authors

Luong,  Thanh Thach
External Organizations;

Nguyen,  An Dinh
External Organizations;

Nguyen,  Dinh Hai
External Organizations;

Tran,  Van Hai
External Organizations;

/persons/resource/nhung

Nhung,  Le
1.1 Space Geodetic Techniques, 1.0 Geodesy, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Le,  Thi Thanh Tam
External Organizations;

Pham,  Thi Thanh Thuy
External Organizations;

Nguyen,  Dinh Thanh
External Organizations;

Do,  Thi-Nhung
External Organizations;

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Fulltext (public)

5026545.pdf
(Publisher version), 3MB

Supplementary Material (public)
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Citation

Luong, T. T., Nguyen, A. D., Nguyen, D. H., Tran, V. H., Nhung, L., Le, T. T. T., Pham, T. T. T., Nguyen, D. T., Do, T.-N. (2024): Reference the seabed topographic depth observations based on the national mean dynamic topography model. - MethodsX, 12, 102624.
https://doi.org/10.1016/j.mex.2024.102624


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5026545
Abstract
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 be- tween 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.