منابع مشابه
Thermal conductivity minimum: a new water anomaly.
We investigate the thermal conductivity of liquid water using computer simulations of the TIP5P model of water. Our simulations show that, in addition to the maximum at high temperatures at constant pressure that it exhibits in experiments, the thermal conductivity also displays a minimum at low temperatures. We find that the temperature of minimum thermal conductivity in supercooled liquid wat...
متن کاملWater and the Electrical Conductivity of the Lunar Mantle
Introduction. The electrical conductivity of minerals increases with temperature and impurity content [e.g., 1]. Aluminum in orthopyroxene is one such impurity that has been invoked to fit the electrical conductivity of the deep interior of the Moon while maintaining subsolidus temperatures [2-4]. However, the required bulk alumina abundance in pyroxene is comparable to that inferred for the en...
متن کاملConstraints on Mantle Electrical Conductivity from Field and Laboratory Measurements
A global geomagnetic response function, sensitive to the average radial electrical conductivity structure of Earth’s mantle to depths of at least 1800 km, is obtained by averaging published, single-site response functions estimated at periods between 10 – 10 seconds from magnetic observatory records. Although the error bars on the global response function are mostly smaller than 5%, Parker’s D ...
متن کاملRadiative Thermal Diffusivity and Conductivity of the Upper Mantle
Olivine comprises >60% of the upper mantle, making it the dominant control on heat transport through the lithosphere. Accurate estimates of the thermal diffusivity and thermal conductivity are important to modeling geotherms, estimating lithospheric thickness, determining the depth range of melt generation, etc. Diffusivity and conductivity result from lattice vibration and radiative transport ...
متن کاملSeismic anisotropy in the lowermost mantle near the Perm Anomaly
The lower mantle is dominated by two large structures with anomalously low shear wave velocities, known as Large Low-Shear Velocity Provinces (LLSVPs). Several studies have documented evidence for strong seismic anisotropy at the base of the mantle near the edges of the African LLSVP. Recent work has identified a smaller structure with similar low-shear wave velocities beneath Eurasia, dubbed t...
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ژورنال
عنوان ژورنال: Journal of geomagnetism and geoelectricity
سال: 1965
ISSN: 0022-1392
DOI: 10.5636/jgg.17.473