Persistent sand bars explained by geodynamic effects

Current effects on resonant reflection of surface water waves by sand bars

The effect of currents flowing across a bar field on resonant reflection of surface waves by the bars is investigated. Using a multiple-scale expansion, evolution equations for the amplitudes of linear waves are derived and used to investigate the reflection of periodic wave trains with steady amplitude for both normal and oblique incidence. The presence of a current is found to shift resonant ...

Global biomass variation and its geodynamic effects, 1982-1998

Redistribution of mass near Earth’s surface alters its rotation, gravity field, and geocenter location. Advanced techniques for measuring these geodetic variations now exist, hut the ability to attribute the observed modes to individual Earth system processes has been hampered by a shortage of reliable * Corresponding author address: M. Rodell, Hydrological Sciences Branch, NASA Goddard Space F...

Can Quasars Be Explained by Cosmological Waveguide Effects?

A sort of gravitational waveguide effect in cosmology could explain, in principle, the huge luminosities coming from quasars using the cosmological large scale structures as selfoc–type or planar waveguides. Furthermore, other anomalous phenomena connected with quasars, as the existence of “brothers” or “twins” objects having different brilliancy but similar spectra and redshifts, placed on the...

Sulphur geodynamic cycle

Evaluation of volcanic and hydrothermal fluxes to the surface environments is important to elucidate the geochemical cycle of sulphur and the evolution of ocean chemistry. This paper presents S/(3)He ratios of vesicles in mid-ocean ridge (MOR) basalt glass together with the ratios of high-temperature hydrothermal fluids to calculate the sulphur flux of 100 Gmol/y at MOR. The S/(3)He ratios of h...

A method for quantifying bird colonies in sand bars via GPS.