Accession Number : ADA311186

Title :   Nonlinear Dynamical Systems Analysis of Seafloor Topography.

Descriptive Note : Final technical rept. 15 May 91-30 Jun 92,

Corporate Author : WOODS HOLE OCEANOGRAPHIC INSTITUTION MA DEPT OF GEOLOGY AND GEOPHYSICS

Personal Author(s) : Little, Sarah A. ; Smith, Deborah K. ; Cawley, Robert

PDF Url : ADA311186

Report Date : 20 AUG 1995

Pagination or Media Count : 3

Abstract : In this project, nonlinear dynamical systems analysis was applied to bathymetric data from the Mid-Atlantic Ridge (MAR) in order to determine whether the processes generating seafloor crust can be explained with low-dimensional nonlinear models. The two phase project involved first the refinement and then the application of a noise reduction technique developed by Robert Cawley and Guan Hsu at the Naval Surface Warfare Center. The technique was successfully adapted to accept stacks of bathymetric profiles, and was applied to SeaBeam records collected between the Atlantic and Kane Fracture Zones. The results of the analysis indicated that the raw data is very high dimensional or nearly stochastic. This is interpreted to mean that the sum total of all processes generating seafloor topography can not be explained with a low dimensional model. This result led to the idea of isolating different seafloor generating processes before analysis. To this end, a wave-let decomposition technique was developed and applied to bathymetric data, which successfully isolated fault and seamount locations from the raw bathymetric data.

Descriptors :   *BATHYMETRY, *OCEAN BOTTOM TOPOGRAPHY, MATHEMATICAL MODELS, STOCHASTIC PROCESSES, DATA MANAGEMENT, NONLINEAR SYSTEMS, SYSTEMS ANALYSIS, NOISE REDUCTION, ATLANTIC OCEAN, OCEAN MODELS, SEDIMENTS, OCEANIC CRUST, SEAFLOOR SPREADING, LITHOSPHERE, MIDATLANTIC RIDGE.

Subject Categories : Physical and Dynamic Oceanography

Distribution Statement : APPROVED FOR PUBLIC RELEASE