Establishment of marine protected areas (MPAs) has been documented to effectively manage marine resource's diversity and enhance fisheries productivity. However, there must be a critical consideration of how these sites are selected and the actual description of the site itself. Its effectiveness is greatly dependent on understanding these habitats and...
Power spectral analysis using the maximum entropy method is
applied to the estimation of depth to the source of magnetic anomalies.
The method assumes that the source is two-dimensional and has a
magnetization with random intensity. The predictive ability of the
maximum entropy technique permits analysis of short segments of...
The Carnegie Ridge is a linear, aseismic, submarine ridge
lying between the Galapagos Islands and the coast of South America.
A 2300 meter deep saddle near 86°W. longitude divides the ridge into
western and eastern segments. Surface ship, near bottom, and grain
size studies from the saddle have been used...
In order to quantitatively examine the crustal structure of the
Panama Basin without the benefit of local seismic refraction data, the
following assumptions were made: (1) No significant lateral changes
in density take place below a depth of 50 km. (2) The densities of the
crustal layers are those of...
Detailed surveys of several segments of the Peru Trench show
that the region between 6° to 10⁰ S is an area of recent deformation.
Seismic reflection records across the axis of the trench show faulting,
uplift, and tilting of the sedimentary fill and the acoustic basement.
Uplift of the acoustic...
A proposed modeling technique that yields a best fit to observed wide-angle reflection profiles incorporates (1) the use of migrated vertical reflection profiles to provide topographic control, (2) ray tracing to produce theoretical wide-angle reflection profiles for hypothetical crustal sections, and (3) the iterative adjustment of crustal layer dip, thickness...
NASA’s ICESat-2 satellite, which launched in 2018, carries the Advanced Topographic Laser Altimeter System (ATLAS), a green-wavelength, photon-counting lidar. While ICESat-2’s primary mission focuses on measurement of elevation of ice sheets, glaciers, sea ice, and vegetation, ATLAS has also proven remarkably effective at measurement of bathymetry, or water depths. However,...
Waves are the primary input of energy in the nearshore region, and together with the currents forced through the transfer of momentum that occurs during the wave breaking process they are the principal mechanism for sediment transport in the nearshore. The basic physics of waves and currents are thought to...
