Solar heating of suspended particles and the dynamics of Martian dust devils

被引：34
|
作者：
Fuerstenau, Stephen D. [1 ]
机构：
[1] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA
来源：
GEOPHYSICAL RESEARCH LETTERS | 2006年 / 33卷 / 19期
关键词：
D O I：
10.1029/2006GL026798
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
The heat input to Martian dust devils due to solar warming of suspended particles is assessed based on a prior estimate of dust loading and from an analysis of shadows cast by dust devils in images taken from orbit. Estimated values for solar heating range from 0.12 to 0.57 W/m(3) with associated temperature increases of 0.011 to 0.051 degrees C per second. These warming rates are comparable to the adiabatic cooling rate expected for a gas parcel rising on Mars with a vertical velocity of 10 m/s. Solar warming of suspended dust serves to maintain buoyancy in a rising dust plume and may be one cause for the large scale of dust devils observed on Mars.
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页数：4
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