Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/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 |
ISSN | 0019-1035 |
EISSN | 1090-2643 |
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/2XILL650/302901 |
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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