Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.epsl.2013.09.033 |
Formation of cycloidal dust devil tracks by redeposition of coarse sands in southern Peru: Implications for Mars | |
Reiss, Dennis1; Zimmerman, Michael I.2,3; Lewellen, David C.4 | |
通讯作者 | Reiss, Dennis |
来源期刊 | EARTH AND PLANETARY SCIENCE LETTERS
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ISSN | 0012-821X |
EISSN | 1385-013X |
出版年 | 2013 |
卷号 | 383页码:7-15 |
英文摘要 | Aeolian processes are the most active processes modifying the surface of Mars under present day climatic conditions. Besides wind streak changes and dune and ripple migrations, active dust devils occur frequently leaving numerous tracks on the Martian surface. These dust devil tracks (DDTs) are characterized by albedo changes with respect to their surroundings and are suggested to be caused by erosion of dust exposing coarser grained material. Here we show that DDTs with a cycloidal pattern analyzed in situ in southern Peru are formed by erosion of very coarse sands at the outer margins and its subsequent annular deposition in the central parts of dust devils. Field observations are supported by large-eddy simulations using typical dust devil parameters resembling the cycloidal morphology of the DDTs. Cycloidal DDTs observed on Mars resembling the Peruvian DDTs suggest an equivalent formation mechanism. Our results imply that the formation of DDTs on Mars are not solely due to dust erosion but also depositional processes and dust devils are strong enough to redistribute coarser grained material such as sands; hence they might contribute to the modification of the present day Martian landscape. (C) 2013 Elsevier B.V. All rights reserved. |
英文关键词 | Earth, Mars, dust devil dust devil tracks geomorphology soil surface atmosphere |
类型 | Article |
语种 | 英语 |
国家 | Germany ; USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000328593500002 |
WOS关键词 | RESOLUTION STEREO CAMERA ; ORBITER CAMERA ; SURFACE ; INTENSIFICATION ; DESERT ; DIRECTIONS ; VORTICES ; MOTION |
WOS类目 | Geochemistry & Geophysics |
WOS研究方向 | Geochemistry & Geophysics |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/176626 |
作者单位 | 1.Univ Munster, Inst Planetol, D-48149 Munster, Germany; 2.NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA; 3.Johns Hopkins Univ, Appl Phys Lab, Laurel, MD USA; 4.W Virginia Univ, Morgantown, WV 26506 USA |
推荐引用方式 GB/T 7714 | Reiss, Dennis,Zimmerman, Michael I.,Lewellen, David C.. Formation of cycloidal dust devil tracks by redeposition of coarse sands in southern Peru: Implications for Mars[J],2013,383:7-15. |
APA | Reiss, Dennis,Zimmerman, Michael I.,&Lewellen, David C..(2013).Formation of cycloidal dust devil tracks by redeposition of coarse sands in southern Peru: Implications for Mars.EARTH AND PLANETARY SCIENCE LETTERS,383,7-15. |
MLA | Reiss, Dennis,et al."Formation of cycloidal dust devil tracks by redeposition of coarse sands in southern Peru: Implications for Mars".EARTH AND PLANETARY SCIENCE LETTERS 383(2013):7-15. |
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