標題: | Bathymetry enhancement by altimetry-derived gravity anomalies in the East Sea (Sea of Japan) |
作者: | Kim, Kwang Bae Hsiao, Yu-Shen Kim, Jeong Woo Lee, Bang Yong Kwon, Yi Kyun Kim, Chang Hwan 土木工程學系 Department of Civil Engineering |
關鍵字: | Bathymetry enhancement;Altimetry-derived free-air gravity anomalies;East Sea (Sea of Japan);Gravity-geologic method (GGM);Density contrast |
公開日期: | 1-十二月-2010 |
摘要: | 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 (<= 12 km) components, while SAS better predicts longer wavelength (>= 25 km) components, despite its dependency on density contrast. To mitigate this limitation, a tuning density contrast of 10.25 g/cm(3) 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. |
URI: | http://dx.doi.org/10.1007/s11001-010-9110-0 http://hdl.handle.net/11536/26258 |
ISSN: | 0025-3235 |
DOI: | 10.1007/s11001-010-9110-0 |
期刊: | MARINE GEOPHYSICAL RESEARCHES |
Volume: | 31 |
Issue: | 4 |
起始頁: | 285 |
結束頁: | 298 |
顯示於類別: | 期刊論文 |