Bathymetry enhancement by altimetry-derived gravity anomalies in the East Sea (Sea of Japan)

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/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.

[1]  S. Calmant,et al.  Modelling bathymetry by inverting satellite altimetry data: A review , 1996 .

[2]  C. Hwang A Bathymetric Model for the South China Sea from Satellite Altimetry and Depth Data , 1999 .

[3]  Timothy H. Dixon,et al.  Bathymetric prediction from Seasat altimeter data , 1983 .

[4]  G. Born,et al.  Seasat Mission Overview , 1979, Science.

[5]  Walter H. F. Smith,et al.  Bathymetric prediction from dense satellite altimetry and sparse shipboard bathymetry , 1994 .

[6]  E. J. Christensen,et al.  TOPEX/POSEIDON mission overview , 1994 .

[7]  D. Roman An integrated geophysical investigation of Greenland's tectonic history , 1999 .

[8]  Walter H. F. Smith,et al.  Chapter 12 Bathymetric Estimation , 2001 .

[9]  The ERS-2 spacecraft and its payload , 1995 .

[10]  S. Calmant Seamount topography by least-squares inversion of altimetric geoid heights and shipborne profiles of bathymetry and/or gravity anomalies , 1994 .

[11]  J. Adams,et al.  The Gravity-Geologic Technique of Mapping Buried Bedrock Topography , 1990 .

[12]  Y. Albouy,et al.  Precise location of unsurveyed seamounts in the Austral archipelago area using SEASAT data , 1987 .

[13]  A. Cazenave,et al.  Global seafloor topography from a least‐squares inversion of altimetry‐based high‐resolution mean sea surface and shipboard soundings , 2002 .

[14]  Robert L. Parker,et al.  The Rapid Calculation of Potential Anomalies , 1973 .

[15]  A. Bonneville,et al.  Prediction of bathymetry in French Polynesia constrained by shipboard data , 1996 .

[16]  Cheinway Hwang,et al.  Bathymetry Estimation Using the Gravity-Geologic Method: An Investigation of Density Contrast Predicted by the Downward Continuation Method , 2011 .

[17]  William J. Hinze,et al.  Mapping Buried Bedrock Topography with Gravity , 1972 .

[18]  D. Sandwell,et al.  Global distribution of seamounts from Seasat profiles , 1988 .

[19]  S. Calmant,et al.  3‐D modelling of seamount topography from satellite altimetry , 1991 .

[20]  A. N. Tikhonov,et al.  Solutions of ill-posed problems , 1977 .

[21]  S. Ward Geotechnical and environmental geophysics , 1990 .

[22]  Walter H. F. Smith,et al.  Global gravity, bathymetry, and the distribution of submarine volcanism through space and time , 2005 .

[23]  A. Cazenave,et al.  Global bathymetry derived from altimeter data of the ERS-1 geodetic mission , 1997 .

[24]  C. Amante,et al.  ETOPO1 arc-minute global relief model : procedures, data sources and analysis , 2009 .

[25]  Bruce C. Douglas,et al.  The GEOSAT Altimeter Mission: A milestone in satellite oceanography , 1986 .

[26]  C. Kilgus GEOSAT Gulf Stream region synthetic geoid available , 1991 .

[27]  R. Parker Understanding Inverse Theory , 1977 .

[28]  Walter H. F. Smith,et al.  Global marine gravity from retracked Geosat and ERS‐1 altimetry: Ridge segmentation versus spreading rate , 2009 .

[29]  Walter H. F. Smith,et al.  New, improved version of generic mapping tools released , 1998 .

[30]  Estimation of the mass density contrasts and the 3D geometrical shape of the source bodies in the Yilgarn area, Eastern Goldfields, Western Australia , 2005 .

[31]  Bang Yong Lee,et al.  Altimetry-Derived Gravity Predictions of Bathymetry by the Gravity-Geologic Method , 2011 .

[32]  P. Vogt,et al.  Satellite radar altimetry aids seafloor mapping , 1991 .

[33]  P. Vogt,et al.  Predicting bathymetry from Geosat-ERM and shipborne profiles in the South Atlantic Ocean , 1992 .