Bathymetry Estimation Using the Gravity-Geologic Method: An Investigation of Density Contrast Predicted by the Downward Continuation Method

The downward continuation (DWC) method was used to determine the density contrast between the seawater and the ocean bottom topographic mass to estimate accurate bathymetry using the gravity-geologic method (GGM) in two study areas, which are located south of Greenland (Test Area #1: 40 - 50¢XW and...

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Bibliographic Details
Main Authors: Yu-Shen Hsiao, Jeong Woo Kim, Kwang Bae Kim, Bang Yong Lee, Cheinway Hwang
Format: Article in Journal/Newspaper
Language:English
Published: Springer 2011
Subjects:
Gravity-geologic method
Density contrast
Downward continuation
Geology
QE1-996.5
Geophysics. Cosmic physics
QC801-809
Greenland
Alaska
Online Access:https://doaj.org/article/4713ab69adcc46e09da32d04ed84c830
Description
Summary:The downward continuation (DWC) method was used to determine the density contrast between the seawater and the ocean bottom topographic mass to estimate accurate bathymetry using the gravity-geologic method (GGM) in two study areas, which are located south of Greenland (Test Area #1: 40 - 50¢XW and 50 - 60¢XN) and south of Alaska (Test Area #2: 140 - 150¢XW and 45 - 55¢XN). The data used in this study include altimetry-derived gravity anomalies, shipborne depths and gravity anomalies. Density contrasts of 1.47 and 1.30 g cm-3 were estimated by DWC for the two test areas. The considerations of predicted density contrasts can enhance the accuracy of 3 ~ 4 m for GGM.

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