Arid
DOI10.1016/j.icarus.2013.08.009
Implications of dune pattern analysis for Titan's surface history
Savage, Christopher J.1; Radebaugh, Jani1; Christiansen, Eric H.1; Lorenz, Ralph D.2
通讯作者Radebaugh, Jani
会议名称3rd International Planetary Dunes Workshop
会议日期JUN 12-15, 2012
会议地点Flagstaff, AZ
英文摘要

Analysis of large-scale morphological parameters can reveal the reaction of dunes to changes in atmospheric and sedimentary conditions. Over 7000 dune width and 7000 dune spacing measurements were obtained for linear dunes in regions across Saturn's moon Titan from images T21, T23, T28, T44 and T48 collected by the Synthetic Aperture RADAR (SAR) aboard the Cassini spacecraft in order to reconstruct the aeolian surface history of Titan. Dunes in the five study areas are all linear in form, with a mean width of 1.3 km and mean crest spacing of 2.7 km, similar to dunes in the African Saharan and Namib deserts on Earth. At the resolution of Cassini SAR, the dunes have the morphology of large linear dunes, and they lack evidence for features of compound or complex dunes. The large size, spacing and uniform morphology are all indicators that Titan's dunes are mature features, in that they have grown toward a steady state for a long period of time. Dune width decreases to the north, perhaps from increased sediment stabilization caused by a net transport of moisture from south to north, or from increased maturity in dunes to the south. Cumulative probability plots of dune parameters measured at different locations across Titan indicate there is a single population of intermediate-to-large-sized dunes on Titan. This suggests that, unlike analogous dunes in the Namib and Agneitir Sand Seas, dune-forming conditions that generated the current set of dunes were stable and active long enough to erase any evidence of past conditions. (C) 2013 Elsevier Inc. All rights reserved.


英文关键词Titan, surface Atmospheres, dynamics Geological processes Radar observations Satellites, surfaces
来源出版物ICARUS
ISSN0019-1035
EISSN1090-2643
出版年2014
卷号230
页码180-190
出版者ACADEMIC PRESS INC ELSEVIER SCIENCE
类型Article;Proceedings Paper
语种英语
国家USA
收录类别SCI-E ; CPCI-S
WOS记录号WOS:000330333100015
WOS关键词CASSINI RADAR OBSERVATIONS ; LINEAR DUNES ; SIZE ; DESERT ; LAKES ; SAR
WOS类目Astronomy & Astrophysics
WOS研究方向Astronomy & Astrophysics
资源类型会议论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/302671
作者单位1.Brigham Young Univ, Dept Geol Sci, Provo, UT 84602 USA;
2.Johns Hopkins Univ, Appl Phys Lab, Laurel, MD 20723 USA
推荐引用方式
GB/T 7714
Savage, Christopher J.,Radebaugh, Jani,Christiansen, Eric H.,et al. Implications of dune pattern analysis for Titan's surface history[C]:ACADEMIC PRESS INC ELSEVIER SCIENCE,2014:180-190.
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