| DOI: | 10.1002/2014GL060971
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| 论文题名: | Growth mechanisms and dune orientation on Titan |
| 作者: | Lucas A.; Rodriguez S.; Narteau C.; Charnay B.; Du Pont S.C.; Tokano T.; Garcia A.; Thiriet M.; Hayes A.G.; Lorenz R.D.; Aharonson O.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9805
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| EISSN: | 1944-9536
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| 出版年: | 2014
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| 卷: | 41, 期:17 | | 起始页码: | 6093
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| 结束页码: | 6100
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| 语种: | 英语
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| Scopus关键词: | Automated detection
; Comprehensive analysis
; Eastward propagation
; Equatorial belts
; Growth mechanisms
; Meridional transport
; Sediment flux
; Sediment supply
; Sediment transport
; climate modeling
; dune
; numerical model
; radar
; sediment transport
; Titan
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| 英文摘要: | Dune fields on Titan cover more than 17% of the moon's surface, constituting the largest known surface reservoir of organics. Their confinement to the equatorial belt, shape, and eastward direction of propagation offer crucial information regarding both the wind regime and sediment supply. Herein, we present a comprehensive analysis of Titan's dune orientations using automated detection techniques on nonlocal denoised radar images. By coupling a new dune growth mechanism with wind fields generated by climate modeling, we find that Titan's dunes grow by sediment transport on a nonmobile substratum. To be fully consistent with both the local crestline orientations and the eastward propagation of Titan's dunes, the sediment should be predominantly transported by strong eastward winds, most likely generated by equinoctial storms or occasional fast westerly gusts. Additionally, convergence of the meridional transport predicted in models can explain why Titan's dunes are confined within ±30° latitudes, where sediment fluxes converge. © 2014. American Geophysical Union. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84907919447&doi=10.1002%2f2014GL060971&partnerID=40&md5=71cf2eeca3093cec1d7d2bdeb3eeeb59
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/7069
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| Appears in Collections: | 气候减缓与适应
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作者单位: | AIM CEA-Saclay, Paris VII-Denis Diderot University, Paris, France
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| Recommended Citation: | |
Lucas A.,Rodriguez S.,Narteau C.,et al. Growth mechanisms and dune orientation on Titan[J]. Geophysical Research Letters,2014-01-01,41(17).
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