Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1038/NGEO2921 |
Electrification of sand on Titan and its influence on sediment transport | |
Harper, J. S. Mendez1,2; McDonald, G. D.1; Dufek, J.1; Malaska, M. J.3; Burr, D. M.4; Hayes, A. G.5; McAdams, J.1; Wray, J. J.1 | |
2017-04-01 | |
发表期刊 | NATURE GEOSCIENCE |
ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2017 |
卷号 | 10期号:4 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Triboelectric, or frictional, charging is a ubiquitous yet poorly understood phenomenon in granular flows. Recognized in terrestrial volcanic plumes and sand storms, such electrification mechanisms are possibly present on Titan. There, dunes and plains of low-density organic particles blanket extensive regions of the surface. Unlike Earth, Titan hosts granular reservoirs whose physical and chemical properties possibly enhance the effets of charging on particle motion. Here we demonstrate in laboratory tumbler experiments under atmospheric conditions and using organic materials analogous to Titan that Titan sands can readily charge triboelectrically. We suggest that the resulting electrostatic forces are strong enough to promote aggregation of granular materials and affect sediment transport on Titan. Indeed, our experiments show that electrostatic forces may increase the saltation threshold for grains by up to an order of magnitude. Efficient electrification may explain puzzling observations on Titan such as the mismatch between dune orientations and inferred wind fields. We conclude that, unlike other Solar System bodies, nanometre-scale electrostatic processes may shape the geomorphological features of Titan across the moon's surface. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000398162800011 |
WOS关键词 | IDENTICAL INSULATORS ; DUNE ORIENTATION ; CASSINI RADAR ; LINEAR DUNES ; LANDING SITE ; TRIBOELECTRIFICATION ; VIMS ; AGGREGATION ; ATMOSPHERE ; PARTICLES |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
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/34920 |
专题 | 地球科学 气候变化 |
作者单位 | 1.Georgia Inst Technol, Sch Earth & Atmospher Sci, Atlanta, GA 30332 USA; 2.Georgia Inst Technol, Sch Elect & Comp Engn, Atlanta, GA 30332 USA; 3.Jet Prop Lab, Pasadena, CA 91109 USA; 4.Univ Tennessee, Dept Earth & Planetary Sci, Knoxville, TN 37996 USA; 5.Cornell Univ, Dept Astron, Ithaca, NY 14853 USA |
推荐引用方式 GB/T 7714 | Harper, J. S. Mendez,McDonald, G. D.,Dufek, J.,et al. Electrification of sand on Titan and its influence on sediment transport[J]. NATURE GEOSCIENCE,2017,10(4). |
APA | Harper, J. S. Mendez.,McDonald, G. D..,Dufek, J..,Malaska, M. J..,Burr, D. M..,...&Wray, J. J..(2017).Electrification of sand on Titan and its influence on sediment transport.NATURE GEOSCIENCE,10(4). |
MLA | Harper, J. S. Mendez,et al."Electrification of sand on Titan and its influence on sediment transport".NATURE GEOSCIENCE 10.4(2017). |
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