Marine magnetic data from the northern Yucatan continental margin were used to
obtain the radially-averaged power-density spectra (RAPDS) of 34 grids, each with
dimensions of 128 by 128 km, overlapping 50 percent. Depths to the tops of three
magnetic horizons were estimated from the slopes of linear segments in the...
Using gravity, magnetic, bathymetric and seismic
refraction data, I have constructed a geophysical cross-section
of the central part of the northern Gulf of California. The
section exhibits a crustal thickness of 18 km and features an
anomalous block of high density lower basement (3.15 g/cm³)
which probably resulted from rifting...
The net mass balance fluctuations of Arctic and Sub-Arctic glaciers, north of 47.5°
North latitude, are described over a 45-year period from 1957 to 2002 using two
parameters derived from a gridded climatology reanalysis. Variability among 185
measured glaciers was represented according to two main components. The first
component represents...
Low-temperature hydrothermal activity in Iceland is
apparently mostly controlled by dikes and fractures.
Conventional methods of production data analysis are not
readily applicable in cases of heterogeneous/anisotropic
fracture dominated hydrothermal systems. Moreover, the
dikes and fractures may control the heat uptake mechanism
of low-temperature activity.
The free-surface response functions of...
The numerical analysis of thermal convection in porous media,
heated from below, and assuming Darcy flow conditions, involves the
solving of a set of non-linear equations for the temperature and flow
fields. The condition of criticality determining the onset of convection
is obtained by linearization and the solving of an...