Bathymetry enhancement by altimetry-derived gravity anomalies in the East Sea (Sea of Japan)
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- Bathymetry enhancement by altimetry-derived gravity anomalies in the East Sea (Sea of Japan)
- Other Titles
- Altimetry derived gravity anomalies를 통한 동해 심도 증강
- Kwang Bae Kim
Jeong Woo Kim
Kim, Chang Hwan
Lee, Bang Yong
Yi Kyun Kwon
- Geochemistry & Geophysics; Oceanography
- Altimetry-derived free-air gra; Bathymetry enhancement; Density contrast; East Sea; Gravity-geologic method (GGM)
- Issue Date
- Kwang Bae Kim, et al. 2011. "Bathymetry enhancement by altimetry-derived gravity anomalies in the East Sea (Sea of Japan)". MARINE GEOPHYSICAL RESEARCH, 31(4): 285-298.
- The gravity-geologic method (GGM) was used to enhance the bathymetry of the East Sea (Sea of Japan) with satellite altimetry-derived free-air gravity anomalies and shipborne depth measurements. By comparison with the bathymetry model of Smith and Sandwell’s (SAS) approach (1994), GGM was found to have an advantage with short wavelength (B12 km) components, while SAS better predicts longer wavelength (C25 km) components, despite its dependency on density contrast. To mitigate this limitation, a tuning density contrast of 10.25 g/cm3 between seawater and the seafloor was primarily estimated by the downward continuation method and then validated by the check points method with GGM. Similarly, SAS is limited by the ‘‘A’’ value in low-pass part of the Wiener filter, which defines the effective range of the wavelength components on bathymetry. As a final result, we present an enhanced GGM bathymetry model by integrating all available data.
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