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

Cited 5 time in scopus
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Title
Bathymetry Estimation Using the Gravity-Geologic Method: An Investigation of Density Contrast Predicted by the Downward Continuation Method
Other Titles
중력-지질학적 방법에 따른 심도 평가-하향연속법에 의해 예측된 밀도대비
Authors
Cheinway Hwang
Lee, Bang Yong
Kwang Bae Kim
Jeong Woo Kim
Yu-Shen Hsiao
Subject
Geology; Meteorology & Atmospheric Sciences; Oceanography
Keywords
Density contrast; Downward continuation; Gravity-geologic method
Issue Date
2011
Publisher
TAO
Citation
Cheinway Hwang, et al. 2011. "Bathymetry Estimation Using the Gravity-Geologic Method: An Investigation of Density Contrast Predicted by the Downward Continuation Method". TERRESTRIAL ATMOSPHERIC AND OCEANIC SCIENCES, 22(3): 347-358.
Abstract
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°W and 50 - 60°N) and south of Alaska (Test Area #2: 140 - 150°W and 45 - 55°N). 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.ch are located south of Greenland (Test Area #1: 40 - 50°W and 50 - 60°N) and south of Alaska (Test Area #2: 140 - 150°W and 45 - 55°N). 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.
URI
http://repository.kopri.re.kr/handle/201206/5996
DOI
http://dx.doi.org/10.3319/TAO.2010.10.13.01(Oc)
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