منابع مشابه
Saltation impact as a means for raising dust on Mars
Experiments were conducted under atmospheric pressures appropriate for Earth and Mars to determine the e,ciency of sand in saltation as a means for raising dust into the atmosphere under wind speeds which would otherwise be too low for dust entrainment. Experiments involving intimate mixtures of sand and dust (1:1 ratio by mass) showed that after an initial .urry of activity of a few seconds du...
متن کاملDust-driven Winds Beyond Spherical Symmetry
New 2D dynamical models for the winds of AGB stars are presented which include hydrodynamics with radiation pressure on dust, equilibrium chemistry, time-dependent dust formation theory, and coupled frequency-dependent Monte Carlo radiative transfer. The simulations reveal a much more complicated picture of the dust formation and wind acceleration as compared to 1D spherical wind models. Trigge...
متن کاملReview the phenomenon of dust and study of effective winds on it (Case Study: Bandar Abbas, Hormozgan province)
Dust storms and high winds is a natural process that occurs in everywhere of arid and semi-arid land in the world. The phenomenon of dust is one of the most important consequences of the desertification that cause different damages. The aim of this study was to analyze the occurrence of dust in the city of Bandar Abbas. First, the frequency of monthly and annual dust from 1985-2005, in the city...
متن کاملNon-spherical dust driven winds of slowly rotating AGB stars
We propose a new mechanism to explain an asymmetric mass loss for C-rich asymptotic giant branch (AGB)stars based on the effect how rotation modifies dust driven winds. Even small deviations from spherical symmetry introduced by slow rotations are amplified in the zone of dust condensation due to the non-linear behaviour and the strong temperature and density dependence of the dust formation pr...
متن کامل2D Models for Dust-driven AGB Star Winds
New axisymmetric (2D) models for dust-driven winds of C-stars are presented which include hydrodynamics with radiation pressure on dust, equilibrium chemistry and time-dependent dust formation with coupled grey Monte Carlo radiative transfer. Considering the most simple case without stellar pulsation (hydrostatic inner boundary condition) these models reveal a more complex picture of the dust f...
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ژورنال
عنوان ژورنال: Monthly Weather Review
سال: 1922
ISSN: 0027-0644,1520-0493
DOI: 10.1175/1520-0493(1922)50<369c:odw>2.0.co;2