Arid
DOI10.1016/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
ISSN0012-821X
EISSN1385-013X
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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