Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL076113 |
Drop Height and Volume Control the Mobility of Long-Runout Landslides on the Earth and Mars | |
Johnson, Brandon C.1; Campbell, Charles S.2 | |
2017-12-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:24 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Long-runout landslides are landslides with volumes of 10(5)m(3) or more, which move much farther from their source than expected. The observation that Martian landslides are generally less mobile than terrestrial landslides offers important evidence regarding the mechanism responsible for the high mobility of long-runout landslides. Here we simulate landslides as granular flow using a soft-particle discrete element model. We show that while surface gravity plays a negligible role, observed differences in fall height naturally reproduce the observed differences in mobility of Martian and terrestrial landslides. We also demonstrate that landslides on Iapetus may fit this trend. Our simulations do not include any fluid and indicate that a mechanism similar to acoustic fluidization can explain the high mobility of long-runout landslides. This implies that long-runout landslides on Mars should not be considered as evidence for ice, saturated clays, or liquid water. |
英文关键词 | landslides granular flow Mars Earth Iapetus |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000422954700027 |
WOS关键词 | VALLES-MARINERIS ; MASS MOVEMENTS ; ACOUSTIC FLUIDIZATION ; EMERGENT PHENOMENON ; MARTIAN LANDSLIDES ; GROUND ICE ; FRICTION ; REDUCTION ; STURZSTROMS ; AVALANCHES |
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/29127 |
专题 | 气候变化 |
作者单位 | 1.Brown Univ, Dept Earth Environm & Planetary Sci, Providence, RI 02912 USA; 2.Univ Southern Calif, Dept Aerosp & Mech Engn, Los Angeles, CA USA |
推荐引用方式 GB/T 7714 | Johnson, Brandon C.,Campbell, Charles S.. Drop Height and Volume Control the Mobility of Long-Runout Landslides on the Earth and Mars[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(24). |
APA | Johnson, Brandon C.,&Campbell, Charles S..(2017).Drop Height and Volume Control the Mobility of Long-Runout Landslides on the Earth and Mars.GEOPHYSICAL RESEARCH LETTERS,44(24). |
MLA | Johnson, Brandon C.,et al."Drop Height and Volume Control the Mobility of Long-Runout Landslides on the Earth and Mars".GEOPHYSICAL RESEARCH LETTERS 44.24(2017). |
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