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dc.contributor.authorHsiao, Yu-Shenen_US
dc.contributor.authorKim, Jeong Wooen_US
dc.contributor.authorKim, Kwang Baeen_US
dc.contributor.authorLee, Bang Yongen_US
dc.contributor.authorHwang, Cheinwayen_US
dc.date.accessioned2014-12-08T15:33:28Z-
dc.date.available2014-12-08T15:33:28Z-
dc.date.issued2011-06-01en_US
dc.identifier.issn1017-0839en_US
dc.identifier.urihttp://dx.doi.org/10.3319/TAO.2010.10.13.01(Oc)en_US
dc.identifier.urihttp://hdl.handle.net/11536/23235-
dc.description.abstractThe 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 degrees W and 50 - 60 degrees N) and south of Alaska (Test Area #2: 140 - 150 degrees W and 45 - 55 degrees 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(-1) were estimated by DWC for the two test areas. The considerations of predicted density contrasts can enhance the accuracy of 3 similar to 4 m for GGM. The GGM model provided results closer to the NGDC (National Geophysical Data Center) model than the ETOPO1 (Earth topographical database I) model. The differences along the shipborne tracks between the GGM and NGDC models for Test Areas #1 and #2 were 35.8 and 50.4 m in standard deviation, respectively. Furthermore, these differences were more strongly correlated with gravity anomalies than bathymetry in the test areas. It is shown that an accuracy of under 40 m can be obtained with comparisons to shipborne depths only in Test Area #1.en_US
dc.language.isoen_USen_US
dc.subjectGravity-geologic methoden_US
dc.subjectDensity contrasten_US
dc.subjectDownward continuationen_US
dc.titleBathymetry Estimation Using the Gravity-Geologic Method: An Investigation of Density Contrast Predicted by the Downward Continuation Methoden_US
dc.typeArticleen_US
dc.identifier.doi10.3319/TAO.2010.10.13.01(Oc)en_US
dc.identifier.journalTERRESTRIAL ATMOSPHERIC AND OCEANIC SCIENCESen_US
dc.citation.volume22en_US
dc.citation.issue3en_US
dc.citation.spage347en_US
dc.citation.epage358en_US
dc.contributor.department土木工程學系zh_TW
dc.contributor.departmentDepartment of Civil Engineeringen_US
dc.identifier.wosnumberWOS:000291140000009-
dc.citation.woscount0-
Appears in Collections:Articles