Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016JD026132 |
An improved numerical model suggests potential differences of wind-blown sand between on Earth and Mars | |
Bo, T. L.1; Fu, L. T.1,2; Liu, L.1; Zheng, X. J.3 | |
2017-06-16 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2017 |
卷号 | 122期号:11 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | The studies on wind-blown sand are crucial for understanding the change of climate and landscape on Mars. However, the disadvantages of the saltation models may result in unreliable predictions. In this paper, the saltation model has been improved from two main aspects, the aerodynamic surface roughness and the lift-off parameters. The aerodynamic surface roughness is expressed as function of particle size, wind strength, air density, and air dynamic viscosity. The lift-off parameters are improved through including the dependence of restitution coefficient on incident parameters and the correlation between saltating speed and angle. The improved model proved to be capable of reproducing the observed data well in both stable stage and evolution process. The modeling of wind-blown sand is promoted by all improved aspects, and the dependence of restitution coefficient on incident parameters could not be ignored. The constant restitution coefficient and uncorrelated lift-off parameter distributions would lead to both the overestimation of the sand transport rate and apparent surface roughness and the delay of evolution process. The distribution of lift-off speed and the evolution of lift-off parameters on Mars are found to be different from those on Earth. This may thus suggest that it is inappropriate to predict the evolution of wind-blown sand by using the lift-off velocity obtained in steady state saltation. And it also may be problematic to predict the wind-blown sand on Mars through applying the lift-off velocity obtained upon terrestrial conditions directly. |
英文关键词 | Mars wind-blown sand lift-off speed lift-off angle transport rate saturation time |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000404131800017 |
WOS关键词 | SALTATING PARTICLES ; METHOD SIMULATIONS ; LIFT-OFF ; BED ; COEFFICIENT ; RESTITUTION ; PARAMETERS ; VELOCITIES ; COLLISIONS ; GRAINS |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/32683 |
专题 | 气候变化 |
作者单位 | 1.Lanzhou Univ, Dept Mech, Key Lab Mech Western Disaster & Environm, Lanzhou, Peoples R China; 2.Chengdu Univ, Sch Mech Engn, Chengdu, Peoples R China; 3.Xidian Univ, Sch Mechano Elect Engn, Xian, Peoples R China |
推荐引用方式 GB/T 7714 | Bo, T. L.,Fu, L. T.,Liu, L.,et al. An improved numerical model suggests potential differences of wind-blown sand between on Earth and Mars[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(11). |
APA | Bo, T. L.,Fu, L. T.,Liu, L.,&Zheng, X. J..(2017).An improved numerical model suggests potential differences of wind-blown sand between on Earth and Mars.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(11). |
MLA | Bo, T. L.,et al."An improved numerical model suggests potential differences of wind-blown sand between on Earth and Mars".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.11(2017). |
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